[cdt-patch] Indexer patch

[Bogdan Gheorghe <gheorghe@xxxxxxxxxx>]

This patch:

- refactors the indexer to make proper
use of the CDescriptor service to manage the indexer extension point persistance/creation

- corrects some synchronization problems
between the IndexManager and the TypeCacheManager
- Updates the Indexer UI to make use
of the CDescriptor service
- Updates the tests
- Updates the Make/Managed Make projects
to handle Indexer setting persistance (a la Binary Parser)

Since it has Make and Managed Make components,
I need someone with commit privileges in all areas to apply these changes.
(Hi Doug!)

Thanks,
Bogdan


Index: src/org/eclipse/cdt/make/internal/core/MakeProject.java
===================================================================
RCS file: /home/tools/org.eclipse.cdt-build/org.eclipse.cdt.make.core/src/org/eclipse/cdt/make/internal/core/MakeProject.java,v
retrieving revision 1.11
diff -u -r1.11 MakeProject.java
--- src/org/eclipse/cdt/make/internal/core/MakeProject.java	25 Jun 2004 14:49:42 -0000	1.11
+++ src/org/eclipse/cdt/make/internal/core/MakeProject.java	21 Mar 2005 04:57:51 -0000
@@ -26,12 +26,17 @@
 		cDescriptor.remove(CCorePlugin.BUILD_SCANNER_INFO_UNIQ_ID);
 		cDescriptor.remove(CCorePlugin.BUILDER_MODEL_ID);
 		updateBinaryParsers(cDescriptor);
+		updateIndexers(cDescriptor);
 	}
 
 	public void update(ICDescriptor cDescriptor, String extensionID) throws CoreException {
 		if (extensionID.equals(CCorePlugin.BINARY_PARSER_UNIQ_ID)) {
 			updateBinaryParsers(cDescriptor);
 		}
+		
+		if (extensionID.equals(CCorePlugin.INDEXER_UNIQ_ID)) {
+			updateIndexers(cDescriptor);
+		}
 	}
 
 	private void updateBinaryParsers(ICDescriptor cDescriptor) throws CoreException {
@@ -45,7 +50,18 @@
 			}
 		}
 	}
-
+ 
+	private void updateIndexers(ICDescriptor cDescriptor) throws CoreException {
+		cDescriptor.remove(CCorePlugin.INDEXER_UNIQ_ID);
+		Preferences corePrefs = CCorePlugin.getDefault().getPluginPreferences();
+		String id = corePrefs.getString(CCorePlugin.PREF_INDEXER);
+		if (id != null && id.length() != 0) {
+			String[] ids = parseStringToArray(id);
+			for (int i = 0; i < ids.length; i++) {
+				cDescriptor.create(CCorePlugin.INDEXER_UNIQ_ID, ids[i]);
+			}
+		}
+	}
 	
 	private String[] parseStringToArray(String syms) {
 		if (syms != null && syms.length() > 0) {

Index: indexer/org/eclipse/cdt/core/indexer/tests/DependencyTests.java
===================================================================
RCS file: /home/tools/org.eclipse.cdt-core/org.eclipse.cdt.core.tests/indexer/org/eclipse/cdt/core/indexer/tests/DependencyTests.java,v
retrieving revision 1.20
diff -u -r1.20 DependencyTests.java
--- indexer/org/eclipse/cdt/core/indexer/tests/DependencyTests.java	15 Mar 2005 03:35:28 -0000	1.20
+++ indexer/org/eclipse/cdt/core/indexer/tests/DependencyTests.java	21 Mar 2005 04:57:32 -0000
@@ -106,7 +106,7 @@
 			indexFile.delete();
 		
 		testProject.setSessionProperty(IndexManager.indexerIDKey, SourceIndexerTests.sourceIndexerID);
-		testProject.setSessionProperty(SourceIndexer.activationKey,new Boolean(true));
+	    testProject.setSessionProperty(SourceIndexer.activationKey,new Boolean(true));
 		
 		if (testProject==null)
 			fail("Unable to create project");	
Index: search/org/eclipse/cdt/core/search/tests/BaseSearchTest.java
===================================================================
RCS file: /home/tools/org.eclipse.cdt-core/org.eclipse.cdt.core.tests/search/org/eclipse/cdt/core/search/tests/BaseSearchTest.java,v
retrieving revision 1.22
diff -u -r1.22 BaseSearchTest.java
--- search/org/eclipse/cdt/core/search/tests/BaseSearchTest.java	15 Mar 2005 03:35:28 -0000	1.22
+++ search/org/eclipse/cdt/core/search/tests/BaseSearchTest.java	21 Mar 2005 04:57:32 -0000
@@ -18,6 +18,8 @@
 import junit.framework.TestCase;
 
 import org.eclipse.cdt.core.CCorePlugin;
+import org.eclipse.cdt.core.ICDescriptor;
+import org.eclipse.cdt.core.ICExtensionReference;
 import org.eclipse.cdt.core.model.ICProject;
 import org.eclipse.cdt.core.search.BasicSearchResultCollector;
 import org.eclipse.cdt.core.search.ICSearchConstants;
@@ -55,13 +57,14 @@
 	static protected SearchEngine				searchEngine;
 	static protected FileManager 				fileManager;
 	static final 	 String 					sourceIndexerID = "org.eclipse.cdt.core.originalsourceindexer"; //$NON-NLS-1$
-	
+	static protected SourceIndexer				sourceIndexer;
 	{
 		
 		//(CCorePlugin.getDefault().getCoreModel().getIndexManager()).reset();
 		monitor = new NullProgressMonitor();
 		
 		workspace = ResourcesPlugin.getWorkspace();
+		CCorePlugin.getDefault().getPluginPreferences().setValue(CCorePlugin.PREF_INDEXER, CCorePlugin.DEFAULT_INDEXER_UNIQ_ID);
 		
 		try {
 			//Create temp project
@@ -71,7 +74,9 @@
 			
 			//Set the id of the source indexer extension point as a session property to allow
 			//index manager to instantiate it
-			testProject.setSessionProperty(IndexManager.indexerIDKey, sourceIndexerID);
+			//testProject.setSessionProperty(IndexManager.indexerIDKey, sourceIndexerID);
+			sourceIndexer = (SourceIndexer) CCorePlugin.getDefault().getCoreModel().getIndexManager().getIndexerForProject(testProject);
+			int x=0;
 		} catch (CoreException e) {}
 		
 		
@@ -107,7 +112,6 @@
 	}
 
 	protected void setUp() throws Exception {
-	
 	}
 
 	protected void tearDown() {
Index: suite/org/eclipse/cdt/core/suite/AutomatedIntegrationSuite.java
===================================================================
RCS file: /home/tools/org.eclipse.cdt-core/org.eclipse.cdt.core.tests/suite/org/eclipse/cdt/core/suite/AutomatedIntegrationSuite.java,v
retrieving revision 1.39
diff -u -r1.39 AutomatedIntegrationSuite.java
--- suite/org/eclipse/cdt/core/suite/AutomatedIntegrationSuite.java	18 Mar 2005 19:17:42 -0000	1.39
+++ suite/org/eclipse/cdt/core/suite/AutomatedIntegrationSuite.java	21 Mar 2005 04:57:33 -0000
@@ -50,9 +50,6 @@
 	public static Test suite() {
 		final AutomatedIntegrationSuite suite = new AutomatedIntegrationSuite();
 		
-		//TODO: BOG Take this out once null indexer id added to suite project creation
-		CCorePlugin.getDefault().getCoreModel().getIndexManager().setEnableUpdates(false);
-		
 		// Add all success tests
 		suite.addTest(CDescriptorTests.suite());
 		//suite.addTest(GCCErrorParserTests.suite());

Index: plugin.xml
===================================================================
RCS file: /home/tools/org.eclipse.cdt-core/org.eclipse.cdt.core/plugin.xml,v
retrieving revision 1.75
diff -u -r1.75 plugin.xml
--- plugin.xml	18 Mar 2005 20:25:58 -0000	1.75
+++ plugin.xml	21 Mar 2005 04:57:03 -0000
@@ -529,24 +529,14 @@
       <initializer class="org.eclipse.cdt.internal.core.CCorePreferenceInitializer"/>
    </extension>
    <extension
+   		 name="Original C/C++ Indexer"
+         id="originalsourceindexer"
          point="org.eclipse.cdt.core.CIndexer">
-      <indexer
-            class="org.eclipse.cdt.internal.core.index.sourceindexer.SourceIndexer"
-            name="Original C/C++ Indexer"
-            id="org.eclipse.cdt.core.originalsourceindexer">
-      </indexer>
+      <cextension>
+         <run
+               class="org.eclipse.cdt.internal.core.index.sourceindexer.SourceIndexer">
+         </run>
+      </cextension>
    </extension>
-
-<!-- =================================================================================== -->
-<!-- Dynamic Variables                                                          -->	
-<!-- =================================================================================== -->
-   <extension
-         point="org.eclipse.core.variables.dynamicVariables">
-      <variable
-            name="cdt_pathentry_var"
-            resolver="org.eclipse.cdt.internal.core.PathEntryVariableResolver"
-            description="%cdt_pathentry_var.description">
-      </variable>
-   </extension>
-
+ 
 </plugin>
Index: index/org/eclipse/cdt/internal/core/index/sourceindexer/SourceIndexer.java
===================================================================
RCS file: /home/tools/org.eclipse.cdt-core/org.eclipse.cdt.core/index/org/eclipse/cdt/internal/core/index/sourceindexer/SourceIndexer.java,v
retrieving revision 1.1
diff -u -r1.1 SourceIndexer.java
--- index/org/eclipse/cdt/internal/core/index/sourceindexer/SourceIndexer.java	14 Mar 2005 05:32:06 -0000	1.1
+++ index/org/eclipse/cdt/internal/core/index/sourceindexer/SourceIndexer.java	21 Mar 2005 04:57:04 -0000
@@ -16,8 +16,10 @@
 import java.util.HashSet;
 import java.util.List;
 
+import org.eclipse.cdt.core.AbstractCExtension;
 import org.eclipse.cdt.core.CCorePlugin;
 import org.eclipse.cdt.core.ICDescriptor;
+import org.eclipse.cdt.core.ICExtensionReference;
 import org.eclipse.cdt.core.ICLogConstants;
 import org.eclipse.cdt.core.index.ICDTIndexer;
 import org.eclipse.cdt.core.index.IIndexChangeListener;
@@ -49,13 +51,11 @@
 import org.eclipse.core.runtime.QualifiedName;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.core.runtime.jobs.Job;
-import org.w3c.dom.Element;
-import org.w3c.dom.Node;
 
 /**
  * @author Bogdan Gheorghe
  */
-public class SourceIndexer implements ICDTIndexer {
+public class SourceIndexer extends AbstractCExtension implements ICDTIndexer {
 	
 	public static boolean VERBOSE = false;
 	
@@ -73,21 +73,27 @@
 	public final static QualifiedName activationKey = new QualifiedName(INDEX_MODEL_ID, ACTIVATION);
 	public final static QualifiedName problemsActivationKey = new QualifiedName( INDEX_MODEL_ID, PROBLEM_ACTIVATION );
 	
-	public static final String INDEXER_ENABLED = "indexEnabled"; //$NON-NLS-1$
+	/*public static final String INDEXER_ENABLED = "indexEnabled"; //$NON-NLS-1$
 	public static final String INDEXER_PROBLEMS_ENABLED = "indexerProblemsEnabled"; //$NON-NLS-1$
 	public static final String SOURCE_INDEXER = "cdt_source_indexer"; //$NON-NLS-1$
 	public static final String INDEXER_VALUE = "indexValue"; //$NON-NLS-1$
 	public static final String INDEXER_PROBLEMS_VALUE = "indexProblemsValue"; //$NON-NLS-1$
-	
+	*/
 	public static final int PREPROCESSOR_PROBLEMS_BIT = 1;
 	public static final int SEMANTIC_PROBLEMS_BIT = 1 << 1;
 	public static final int SYNTACTIC_PROBLEMS_BIT = 1 << 2;
 
+	public static final String SOURCE_INDEXER_ID = "originalsourceindexer"; //$NON-NLS-1$
+	public static final String SOURCE_INDEXER_UNIQUE_ID = CCorePlugin.PLUGIN_ID + "." + SOURCE_INDEXER_ID; //$NON-NLS-1$;
+	
+	
 	private CIndexStorage		indexStorage = null;
 	public 	ReadWriteMonitor	storageMonitor = null;
 	private IndexManager  		indexManager = null; 
 	
 	private HashSet 			jobSet = null;
+	private boolean				indexEnabled = false;
+	
 	
     public SourceIndexer(){
     	this.indexManager = CCorePlugin.getDefault().getCoreModel().getIndexManager();
@@ -211,10 +217,6 @@
 		}
 	}
 	
-
-	
-	
-
 	/**
 	 * @param project
 	 * @return
@@ -227,59 +229,65 @@
 		
 		try {
 			indexValue = (Boolean) project.getSessionProperty(activationKey);
-		} catch (CoreException e) {
-		}
+		} catch (CoreException e) {}
 		
 		if (indexValue != null)
 			return indexValue.booleanValue();
 		
 		try {
-			//Load value for project
-			indexValue = loadIndexerEnabledFromCDescriptor(project);
-			if (indexValue != null){
-				project.setSessionProperty(SourceIndexer.activationKey, indexValue);
-				return indexValue.booleanValue();
+			ICDescriptor cdesc = CCorePlugin.getDefault().getCProjectDescription(project, false);
+			if (cdesc == null)
+				return false;
+			
+			ICExtensionReference[] cext = cdesc.get(CCorePlugin.INDEXER_UNIQ_ID);
+			if (cext.length > 0) {
+				//initializeIndexerId();
+				for (int i = 0; i < cext.length; i++) {
+					String id = cext[i].getID();
+						String orig = cext[i].getExtensionData("indexenabled"); //$NON-NLS-1$
+						if (orig != null){
+							Boolean tempBool = new Boolean(orig);
+							indexEnabled = tempBool.booleanValue();
+						}
+				}
 			}
+		
 			
-//			TODO: Indexer Block Place holder for Managed Make - take out
-			indexValue = new Boolean(true);
-			project.setSessionProperty(SourceIndexer.activationKey, indexValue);
-			return indexValue.booleanValue();
-		} catch (CoreException e1) {
-		}
+		} catch (CoreException e) {}
 		
-		return false;
+		return indexEnabled;
 	}
 	
 
 	
 	public int indexProblemsEnabled(IProject project) {
-		Integer value = null;
 		
-		try {
-			value = (Integer) project.getSessionProperty(problemsActivationKey);
-		} catch (CoreException e) {
-		}
-		
-		if (value != null)
-			return value.intValue();
+		if( project == null || !project.exists() || !project.isOpen() )
+			return 0;
 		
+		int indexProblemsEnabled = 0;
 		try {
-			//Load value for project
-			value = loadIndexerProblemsEnabledFromCDescriptor(project);
-			if (value != null){
-				project.setSessionProperty(SourceIndexer.problemsActivationKey, value);
-				return value.intValue();
+			ICDescriptor cdesc = CCorePlugin.getDefault().getCProjectDescription(project, false);
+			if (cdesc == null)
+				return 0;
+			
+			ICExtensionReference[] cext = cdesc.get(CCorePlugin.INDEXER_UNIQ_ID);
+			if (cext.length > 0) {
+				//initializeIndexerId();
+				for (int i = 0; i < cext.length; i++) {
+					String id = cext[i].getID();
+						String orig = cext[i].getExtensionData("indexmarkers"); //$NON-NLS-1$
+						if (orig != null){
+							Integer tempInt = new Integer(orig);
+							indexProblemsEnabled = tempInt.intValue();
+						}
+				}
 			}
+		
 			
-			//TODO: Indexer Block Place holder for Managed Make - take out
-			value = new Integer(0);
-			project.setSessionProperty(SourceIndexer.problemsActivationKey, value);
-			return value.intValue();
-		} catch (CoreException e1) {
-		}
+		} catch (CoreException e) {}
 		
-		return 0;
+		return indexProblemsEnabled;
 	}
 	/**
 	 * Index the content of the given source folder.
@@ -332,56 +340,6 @@
 	public void jobFinishedNotification(IIndexJob job) {
 		this.indexJobFinishedNotification(job);
 		
-	}
-	
-
-	
-	private Boolean loadIndexerEnabledFromCDescriptor(IProject project) throws CoreException {
-		// Check if we have the property in the descriptor
-		// We pass false since we do not want to create the descriptor if it does not exists.
-		ICDescriptor descriptor = CCorePlugin.getDefault().getCProjectDescription(project, false);
-		Boolean strBool = null;
-		if (descriptor != null) {
-			Node child = descriptor.getProjectData(SOURCE_INDEXER).getFirstChild();
-		
-			while (child != null) {
-				if (child.getNodeName().equals(INDEXER_ENABLED)) 
-					strBool = Boolean.valueOf(((Element)child).getAttribute(INDEXER_VALUE));
-			
-			
-				child = child.getNextSibling();
-			}
-		}
-		
-		return strBool;
-	}
-	private Integer loadIndexerProblemsEnabledFromCDescriptor(IProject project) throws CoreException {
-	// we are only checking for the settings do not create the descriptor.
-		ICDescriptor descriptor = CCorePlugin.getDefault().getCProjectDescription(project, false);
-		Integer strInt = null;
-		if( descriptor != null ){
-			Node child = descriptor.getProjectData(SourceIndexer.SOURCE_INDEXER).getFirstChild();
-			
-			while (child != null) {
-				if (child.getNodeName().equals(INDEXER_PROBLEMS_ENABLED)){
-					String val = ((Element)child).getAttribute(INDEXER_PROBLEMS_VALUE);
-					try{
-						strInt = Integer.valueOf( val );
-					} catch( NumberFormatException e ){
-						//some old projects might have a boolean stored, translate that into just preprocessors
-						Boolean bool = Boolean.valueOf( val );
-						if( bool.booleanValue() )
-							strInt = new Integer( SourceIndexer.PREPROCESSOR_PROBLEMS_BIT );
-						else 
-							strInt = new Integer( 0 );
-					}
-					break;
-				}
-				child = child.getNextSibling();
-			}
-		}
-		
-		return strInt;
 	}
 	
 	static private class RemoveIndexMarkersJob extends Job{
Index: index/org/eclipse/cdt/internal/core/search/indexing/IndexManager.java
===================================================================
RCS file: /home/tools/org.eclipse.cdt-core/org.eclipse.cdt.core/index/org/eclipse/cdt/internal/core/search/indexing/IndexManager.java,v
retrieving revision 1.41
diff -u -r1.41 IndexManager.java
--- index/org/eclipse/cdt/internal/core/search/indexing/IndexManager.java	18 Mar 2005 19:06:22 -0000	1.41
+++ index/org/eclipse/cdt/internal/core/search/indexing/IndexManager.java	21 Mar 2005 04:57:04 -0000
@@ -16,6 +16,7 @@
 
 import org.eclipse.cdt.core.CCorePlugin;
 import org.eclipse.cdt.core.ICDescriptor;
+import org.eclipse.cdt.core.ICExtensionReference;
 import org.eclipse.cdt.core.index.ICDTIndexer;
 import org.eclipse.cdt.core.index.IIndexStorage;
 import org.eclipse.cdt.core.model.ICElement;
@@ -27,21 +28,16 @@
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IResourceDelta;
-import org.eclipse.core.resources.IWorkspaceRunnable;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.IExtension;
 import org.eclipse.core.runtime.IExtensionPoint;
 import org.eclipse.core.runtime.IPath;
-import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.QualifiedName;
 import org.eclipse.core.runtime.Status;
-import org.eclipse.core.runtime.jobs.Job;
-import org.w3c.dom.Document;
-import org.w3c.dom.Element;
-import org.w3c.dom.Node;
 
 /**
  * @author Bogdan Gheorghe
@@ -60,198 +56,30 @@
 
 	public static boolean VERBOSE = false;
 	
-    //Map of Contributed Indexers; keyed by project
-    private HashMap contributedIndexerMap = null;
-   
     //Map of Persisted Indexers; keyed by project
     private HashMap indexerMap = null;
-   
-    //Upgrade index version
-    private boolean upgradeIndexEnabled = false;
-    private int		upgradeIndexProblems = 0;
-   
-	private ReadWriteMonitor monitor = new ReadWriteMonitor();
-	private boolean enableUpdates = true;
-	
-    /**
-     * Create an indexer only on request
-     */
-    protected static class CDTIndexer {
 
-        IConfigurationElement element;
-        ICDTIndexer indexer;
-        
-        public CDTIndexer(IConfigurationElement _element) {
-            element = _element;
-        }
-
-        public ICDTIndexer getIndexer() throws CoreException {
-            if (indexer == null) {
-            	indexer = (ICDTIndexer) element.createExecutableExtension("class"); //$NON-NLS-1$
-            }
-            return indexer;
-        }
-
-        public String getName() {
-            return element.getAttribute("name"); //$NON-NLS-1$
-        }
-        
-    }
-    
-    private class UpdateIndexVersionJob extends Job{
-		private final IProject project;
-		public UpdateIndexVersionJob( IProject project, String name ){
-			super( name );
-			this.project = project;
-		}
+	private ReadWriteMonitor monitor = new ReadWriteMonitor();
 
-		protected IStatus run(IProgressMonitor monitor) {
-			IWorkspaceRunnable job = new IWorkspaceRunnable( ){
-				public void run(IProgressMonitor monitor){
-					doProjectUpgrade(project);
-					doSourceIndexerUpgrade(project);
-				}
-			};
-			try {
-				CCorePlugin.getWorkspace().run(job, project, 0, null);
-			} catch (CoreException e) {
-			}
-			return Status.OK_STATUS;
-		}
-	}
-	
-    
-    
 	/**
 	 * Flush current state
 	 */
-	public synchronized void reset() {
-		super.reset();
-		
-		initializeIndexersMap();
-		this.indexerMap = new HashMap(5);
+	public void reset() {
 		try{
-		monitor.enterWrite();
-		initializeIndexerID();
-		} finally {
-		monitor.exitWrite();
-		}
-	}
-	
-
-
-	
-	/**
-	 * 
-	 */
-	private void initializeIndexerID() {
-		IProject[] projects = CCorePlugin.getWorkspace().getRoot().getProjects();
-		//Make sure that all projects are added to the indexer map and updated
-		//where neccesary
-		for (int i=0; i<projects.length; i++){
-			try {
-				if (projects[i].isAccessible())
-					initializeIndexer(projects[i]);
-			} catch (CoreException e) {}
-		}
-		
-	}
-
-	private ICDTIndexer initializeIndexer(IProject project) throws CoreException {
-
-		ICDTIndexer indexer = null;
-		indexer = (ICDTIndexer) indexerMap.get(project);
-		
-		if (indexer == null){
-			String indexerID = null;
-			try {
-				//Indexer has not been created yet for this session
-				//Check to see if the indexer has been set in a session property 
-				indexerID = (String) project.getSessionProperty(indexerIDKey);
-			} catch (CoreException e) {}
-			
-			if (indexerID == null){
-				try{
-				//Need to load the indexer from descriptor
-				indexerID = loadIndexerIDFromCDescriptor(project);
-				} catch (CoreException e){}
-			}
-			
-			//Make sure that we have an indexer ID
-			if (indexerID == null && 
-				enableUpdates) {
-				//No persisted info on file? Must be old project - run temp. upgrade
-					UpdateIndexVersionJob job = new UpdateIndexVersionJob(project, "Update Index Version" ); //$NON-NLS-1$
-				
-					IProgressMonitor group = this.getIndexJobProgressGroup();
-					
-					job.setRule( project );
-					if( group != null )
-						job.setProgressGroup( group, 0 );
-					job.setPriority( Job.SHORT );
-					job.schedule();	
-			}
-			
-			//If we're asking for the null indexer,return null
-			if (indexerID == null ||
-				indexerID.equals(nullIndexerID)) 
-				return null;
-			
-			//Create the indexer and store it
-			indexer = getIndexer(indexerID);
-			indexerMap.put(project,indexer);
-			
-		}
-		return indexer;
-	}
-	
-	/**
-	 * Loads indexerID from .cdtproject file
-	 * @param project
-	 * @param includes
-	 * @param symbols
-	 * @throws CoreException
-	 */
-	private String loadIndexerIDFromCDescriptor(IProject project) throws CoreException {
-		ICDescriptor descriptor = CCorePlugin.getDefault().getCProjectDescription(project, true);
-		
-		Node child = descriptor.getProjectData(CDT_INDEXER).getFirstChild();
-		
-		String indexerID = null;
-		
-		while (child != null) {
-			if (child.getNodeName().equals(INDEXER_ID)) 
-				  indexerID = ((Element)child).getAttribute(INDEXER_ID_VALUE);
-			
-			child = child.getNextSibling();
+			monitor.enterWrite();
+			super.reset();
+			//Set default upgrade values
+			CCorePlugin.getDefault().getPluginPreferences().setValue(CCorePlugin.PREF_INDEXER, CCorePlugin.DEFAULT_INDEXER_UNIQ_ID);
+			this.indexerMap = new HashMap(5);
+		} finally{
+			monitor.exitWrite();
 		}
-		
-		return indexerID;
 	}
-	
-	
-	  /**
-     * Adds all the contributed Indexer Pages to a map
-     */
-    private void initializeIndexersMap() {
-    	
-        contributedIndexerMap = new HashMap(5);
-        
-        IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(CCorePlugin.PLUGIN_ID, "CIndexer"); //$NON-NLS-1$
-        IConfigurationElement[] infos = extensionPoint.getConfigurationElements();
-        for (int i = 0; i < infos.length; i++) {
-            if (infos[i].getName().equals("indexer")) { //$NON-NLS-1$
-                String id = infos[i].getAttribute("id"); //$NON-NLS-1$
-                contributedIndexerMap.put(id, new CDTIndexer(infos[i]));
-            }
-        }
-    }
-
-	/**
+	 /**
 	 * Notify indexer which scheduled this job that the job has completed  
 	 * 
 	 */
-	protected synchronized void jobFinishedNotification(IIndexJob job) {
+	protected void jobFinishedNotification(IIndexJob job) {
 		if (job instanceof IndexRequest ){
 			IndexRequest indexRequest = (IndexRequest) job;
 			IPath path = indexRequest.getIndexPath();
@@ -262,10 +90,6 @@
 				indexer.indexJobFinishedNotification(job);
 		}
 	}
-
-
-
-
 	/**
 	 * @param project
 	 * @param element
@@ -277,13 +101,6 @@
 		
 		if (indexer != null)
 			indexer.addRequest(element, delta);
-		else{
-		//Maybe indexer hasn't been created for this project yet
-		//Scenarios:
-		//1) New Project created - UI has set env var telling which indexer to use
-		//2) Existing Project - the indexer has been persisted to file, need to load it up from CCorePlugin
-			
-		}
 	}
 
 	/**
@@ -375,26 +192,21 @@
 		return new CIndexStorage(indexer);
 	}
 	
-	public synchronized int getJobStart(){
+	public int getJobStart(){
 		return jobStart;
 	}
 	
-	public synchronized int getJobEnd(){
+	public int getJobEnd(){
 		return jobEnd;
 	}
-
 	/**
 	 * Returns the job at position in the awaiting job queue
 	 * @param position
 	 * @return
 	 */
-	public synchronized IIndexJob getAwaitingJobAt(int position){
+	public IIndexJob getAwaitingJobAt(int position){
 		return this.awaitingJobs[position];
 	}
-
-
-
-
 	/**
 	 * Check to see if the indexer associated with this project
 	 * requires dependency update notifications
@@ -408,238 +220,95 @@
 		
 	}
 	
-	public synchronized ICDTIndexer getIndexerForProject(IProject project){
-		//Make sure we're not updating list
-		monitor.enterRead();
-		//All indexers that were previously persisted should have been loaded at 
-		//this point
+	public ICDTIndexer getIndexerForProject(IProject project){
 		ICDTIndexer indexer = null;
-		indexer = (ICDTIndexer) indexerMap.get(project);
 		try {
-			if (indexer == null){
-				String indexerID = null;
+			//Make sure we're not updating list
+			monitor.enterRead();
+			
+			//See if indexer exists already
+			indexer = (ICDTIndexer) indexerMap.get(project);
+			
+			//Create the indexer and store it
+			if (indexer == null) {
+				monitor.exitRead();
 				try {
-					//Indexer has not been created yet for this session
-					//Check to see if the indexer has been set in a session property 
-					indexerID = (String) project.getSessionProperty(indexerIDKey);
-				} catch (CoreException e) {}
-				
-				//Project was either closed at startup or imported
-				if (indexerID == null &&
-						project.isAccessible()){
-					try {
-						indexer=initializeIndexer(project);
-					} catch (CoreException e1) {}
-				}
-				else{
-					//Create the indexer and store it
-					indexer = getIndexer(indexerID);
+					monitor.enterWrite();
+					indexer = getIndexer(project);
+					//Make sure we're not putting null in map
+					if (indexer != null)
+						indexerMap.put(project,indexer);
+				} finally{
+					monitor.exitWriteEnterRead();
 				}
+			}
+			return indexer;
 				
-				//Make sure we're not putting null in map
-				if (indexer != null)
-					indexerMap.put(project,indexer);
+			}finally {
+				monitor.exitRead();
 			}
-		} finally {	
-			monitor.exitRead();
-		}
-		
-		return indexer;
 	}
 	
-   /**
-	 * @param project
-	 */
-	private synchronized void doSourceIndexerUpgrade(IProject project) {
-		ICDescriptor descriptor = null;
-		Element rootElement = null;
-		IProject newProject = null;
-		
-		try {
-			newProject = project;
-			descriptor = CCorePlugin.getDefault().getCProjectDescription(newProject, true);
-			rootElement = descriptor.getProjectData(SourceIndexer.SOURCE_INDEXER);
-		
-			// Clear out all current children
-			Node child = rootElement.getFirstChild();
-			while (child != null) {
-				rootElement.removeChild(child);
-				child = rootElement.getFirstChild();
-			}
-			Document doc = rootElement.getOwnerDocument();
-	
-					
-			saveIndexerEnabled(upgradeIndexEnabled, rootElement, doc);
-			saveIndexerProblemsEnabled( upgradeIndexProblems, rootElement, doc );
-			
-			descriptor.saveProjectData();
-			
-			//Update project session property
-			
-			project.setSessionProperty(SourceIndexer.activationKey,new Boolean(upgradeIndexEnabled));
-			project.setSessionProperty(SourceIndexer.problemsActivationKey, new Integer( upgradeIndexProblems ));	
-	
-		} catch (CoreException e) {}
-	}
-
-	private static void saveIndexerEnabled (boolean indexerEnabled, Element rootElement, Document doc ) {
-		
-		Element indexEnabled = doc.createElement(SourceIndexer.INDEXER_ENABLED);
-		Boolean tempValue= new Boolean(indexerEnabled);
-		
-		indexEnabled.setAttribute(SourceIndexer.INDEXER_VALUE,tempValue.toString());
-		rootElement.appendChild(indexEnabled);
-
-	}
-	private static void saveIndexerProblemsEnabled ( int problemValues, Element rootElement, Document doc ) {
-		
-		Element enabled = doc.createElement(SourceIndexer.INDEXER_PROBLEMS_ENABLED);
-		Integer tempValue= new Integer( problemValues );
-		
-		enabled.setAttribute(SourceIndexer.INDEXER_PROBLEMS_VALUE, tempValue.toString());
-		rootElement.appendChild(enabled);
-	}
-
-/**
-	 * @return
-	 */
-	private synchronized String doProjectUpgrade(IProject project) {
-		ICDescriptor descriptor = null;
-		Element rootElement = null;
-		IProject newProject = null;
-		
-		try {
-			//Get the old values from .cdtproject before upgrading
-			Boolean tempEnabled = loadIndexerEnabledFromCDescriptor(project);
-			if (tempEnabled != null)
-				upgradeIndexEnabled = tempEnabled.booleanValue();
-			
-			Integer tempProblems = loadIndexerProblemsEnabledFromCDescriptor(project);
-			if (tempProblems != null)
-				upgradeIndexProblems = tempProblems.intValue();
-			
-		} catch (CoreException e1) {}
-		
-		
-		//For now all upgrades will be to the old source indexer
-		String indexerPageID = "org.eclipse.cdt.ui.originalSourceIndexerUI"; //$NON-NLS-1$
-		String indexerID = "org.eclipse.cdt.core.originalsourceindexer"; //$NON-NLS-1$
-		
-		try {
-			newProject = project;
-			descriptor = CCorePlugin.getDefault().getCProjectDescription(newProject, true);
-			rootElement = descriptor.getProjectData(IndexManager.CDT_INDEXER);
-		
-			// Clear out all current children
-			Node child = rootElement.getFirstChild();
-			while (child != null) {
-				rootElement.removeChild(child);
-				child = rootElement.getFirstChild();
-			}
-			Document doc = rootElement.getOwnerDocument();
-			
-			saveIndexerInfo(indexerID, indexerPageID, rootElement, doc);
-		
-			descriptor.saveProjectData();
-			
-			//Update project session property
-			
-			project.setSessionProperty(IndexManager.indexerIDKey, indexerID);	
-			//project.setSessionProperty(indexerUIIDKey, indexerPageID);
-	
-		} catch (CoreException e) {}
-		
-		return indexerID;
-	}
-
-
-	private static void saveIndexerInfo (String indexerID, String indexerUIID, Element rootElement, Document doc ) {
-		
-		//Save the indexer id
-		Element indexerIDElement = doc.createElement(IndexManager.INDEXER_ID);
-		indexerIDElement.setAttribute(IndexManager.INDEXER_ID_VALUE,indexerID);
-		rootElement.appendChild(indexerIDElement);
-		
-		//Save the indexer UI id
-		Element indexerUIIDElement = doc.createElement("indexerUI"); //$NON-NLS-1$
-		indexerUIIDElement.setAttribute("indexerUIValue",indexerUIID); //$NON-NLS-1$
-		rootElement.appendChild(indexerUIIDElement);
-	}
-
-	private Boolean loadIndexerEnabledFromCDescriptor(IProject project) throws CoreException {
-		// Check if we have the property in the descriptor
-		// We pass false since we do not want to create the descriptor if it does not exists.
-		ICDescriptor descriptor = CCorePlugin.getDefault().getCProjectDescription(project, false);
-		Boolean strBool = null;
-		if (descriptor != null) {
-			Node child = descriptor.getProjectData(CDT_INDEXER).getFirstChild();
-		
-			while (child != null) {
-				if (child.getNodeName().equals(SourceIndexer.INDEXER_ENABLED)) 
-					strBool = Boolean.valueOf(((Element)child).getAttribute(SourceIndexer.INDEXER_VALUE));
-			
-			
-				child = child.getNextSibling();
-			}
+	public ICDTIndexer getDefaultIndexer(IProject project) throws CoreException {
+		ICDTIndexer indexer = null;
+		String id = CCorePlugin.getDefault().getPluginPreferences().getDefaultString(CCorePlugin.PREF_INDEXER);
+		if (id == null || id.length() == 0) {
+			id = CCorePlugin.DEFAULT_INDEXER_UNIQ_ID;
 		}
 		
-		return strBool;
-	}
-	private Integer loadIndexerProblemsEnabledFromCDescriptor(IProject project) throws CoreException {
-	// we are only checking for the settings do not create the descriptor.
-		ICDescriptor descriptor = CCorePlugin.getDefault().getCProjectDescription(project, false);
-		Integer strInt = null;
-		if( descriptor != null ){
-			Node child = descriptor.getProjectData(CDT_INDEXER).getFirstChild();
-			
-			while (child != null) {
-				if (child.getNodeName().equals(SourceIndexer.INDEXER_PROBLEMS_ENABLED)){
-					String val = ((Element)child).getAttribute(SourceIndexer.INDEXER_PROBLEMS_VALUE);
-					try{
-						strInt = Integer.valueOf( val );
-					} catch( NumberFormatException e ){
-						//some old projects might have a boolean stored, translate that into just preprocessors
-						Boolean bool = Boolean.valueOf( val );
-						if( bool.booleanValue() )
-							strInt = new Integer( SourceIndexer.PREPROCESSOR_PROBLEMS_BIT );
-						else 
-							strInt = new Integer( 0 );
-					}
+        IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(CCorePlugin.PLUGIN_ID, CCorePlugin.INDEXER_SIMPLE_ID);
+		IExtension extension = extensionPoint.getExtension(id);
+		if (extension != null) {
+			IConfigurationElement element[] = extension.getConfigurationElements();
+			for (int i = 0; i < element.length; i++) {
+				if (element[i].getName().equalsIgnoreCase("cextension")) { //$NON-NLS-1$
+					indexer = (ICDTIndexer) element[i].createExecutableExtension("run"); //$NON-NLS-1$
 					break;
 				}
-				child = child.getNextSibling();
 			}
+		} else {
+			IStatus s = new Status(IStatus.ERROR, CCorePlugin.PLUGIN_ID, -1,"No Indexer Found", null); //$NON-NLS-1$
+			throw new CoreException(s);
 		}
-		
-		return strInt;
+		return indexer;
 	}
-
-protected ICDTIndexer getIndexer(String indexerId) {
-	    CDTIndexer configElement = (CDTIndexer) contributedIndexerMap.get(indexerId);
-	    if (configElement != null) {
-	        try {
-	            return configElement.getIndexer();
-	        } catch (CoreException e) {}
-	    }
-	    return null;
+	
+   protected ICDTIndexer getIndexer(IProject project) {
+   	ICDTIndexer indexer = null;
+   	try{
+		ICDescriptor cdesc = CCorePlugin.getDefault().getCProjectDescription(project,true);
+		ICExtensionReference[] cextensions = cdesc.get(CCorePlugin.INDEXER_UNIQ_ID, true);
+		
+		if (cextensions != null && cextensions.length > 0)
+			indexer = (ICDTIndexer) cextensions[0].createExtension();
+	
+   	} catch (CoreException e){}
+   	
+	if (indexer == null)
+		try {
+			indexer = getDefaultIndexer(project);
+		} catch (CoreException e1) {}
+	
+	 return indexer;
    }
    
    protected void notifyIdle(long idlingTime) {
    	//Notify all indexers
-   	if (indexerMap == null)
-   		return;
-   		
-   	Set mapKeys = indexerMap.keySet();
-   	Iterator i = mapKeys.iterator();
-   	while (i.hasNext()){
-   		IProject tempProject = (IProject) i.next();
-   		ICDTIndexer indexer = (ICDTIndexer) indexerMap.get(tempProject);
-   		if (indexer != null)
-   			indexer.notifyIdle(idlingTime);
+   	monitor.enterRead();
+   	try{
+	   	if (indexerMap == null)
+	   		return;
+	   		
+	   	Set mapKeys = indexerMap.keySet();
+	   	Iterator i = mapKeys.iterator();
+	   	while (i.hasNext()){
+	   		IProject tempProject = (IProject) i.next();
+	   		ICDTIndexer indexer = (ICDTIndexer) indexerMap.get(tempProject);
+	   		if (indexer != null)
+	   			indexer.notifyIdle(idlingTime);
+	   	}
+   	} finally{
+   		monitor.exitRead();
    	}
    }
-   
-	public void setEnableUpdates(boolean enableUpdates) {
-		this.enableUpdates = enableUpdates;
-	}
 }
Index: src/org/eclipse/cdt/core/CCorePlugin.java
===================================================================
RCS file: /home/tools/org.eclipse.cdt-core/org.eclipse.cdt.core/src/org/eclipse/cdt/core/CCorePlugin.java,v
retrieving revision 1.77
diff -u -r1.77 CCorePlugin.java
--- src/org/eclipse/cdt/core/CCorePlugin.java	15 Mar 2005 19:55:34 -0000	1.77
+++ src/org/eclipse/cdt/core/CCorePlugin.java	21 Mar 2005 04:57:07 -0000
@@ -76,6 +76,12 @@
 	public final static String DEFAULT_BINARY_PARSER_UNIQ_ID = PLUGIN_ID + "." + DEFAULT_BINARY_PARSER_SIMPLE_ID; //$NON-NLS-1$
 	public final static String PREF_USE_STRUCTURAL_PARSE_MODE = "useStructualParseMode"; //$NON-NLS-1$
 	
+	public static final String INDEXER_SIMPLE_ID = "CIndexer"; //$NON-NLS-1$
+	public static final String INDEXER_UNIQ_ID = PLUGIN_ID + "." + INDEXER_SIMPLE_ID; //$NON-NLS-1$
+	public final static String PREF_INDEXER = "indexer"; //$NON-NLS-1$
+	public final static String DEFAULT_INDEXER_SIMPLE_ID = "originalsourceindexer"; //$NON-NLS-1$
+	public final static String DEFAULT_INDEXER_UNIQ_ID =  PLUGIN_ID + "." + DEFAULT_INDEXER_SIMPLE_ID; //$NON-NLS-1$
+	
 	public final static String ERROR_PARSER_SIMPLE_ID = "ErrorParser"; //$NON-NLS-1$
 
 	// default store for pathentry

Index: src/org/eclipse/cdt/internal/ui/CUIMessages.properties
===================================================================
RCS file: /home/tools/org.eclipse.cdt-core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/CUIMessages.properties,v
retrieving revision 1.15
diff -u -r1.15 CUIMessages.properties
--- src/org/eclipse/cdt/internal/ui/CUIMessages.properties	24 Jan 2005 18:49:21 -0000	1.15
+++ src/org/eclipse/cdt/internal/ui/CUIMessages.properties	21 Mar 2005 04:59:08 -0000
@@ -62,6 +62,7 @@
 IndexerOptions.enablePreprocessor = Report &preprocessor problems
 IndexerOptions.enableSemantic = Report &semantic problems
 IndexerOptions.enableSyntactic = Report s&yntactic problems
+IndexerOptiosn.task.savingAttributes = Saving Attributes
 
 StatusBarUpdater.num_elements_selected={0} items selected
 
Index: src/org/eclipse/cdt/ui/dialogs/IndexerBlock.java
===================================================================
RCS file: /home/tools/org.eclipse.cdt-core/org.eclipse.cdt.ui/src/org/eclipse/cdt/ui/dialogs/IndexerBlock.java,v
retrieving revision 1.9
diff -u -r1.9 IndexerBlock.java
--- src/org/eclipse/cdt/ui/dialogs/IndexerBlock.java	14 Mar 2005 21:08:20 -0000	1.9
+++ src/org/eclipse/cdt/ui/dialogs/IndexerBlock.java	21 Mar 2005 04:59:10 -0000
@@ -17,7 +17,8 @@
 
 import org.eclipse.cdt.core.CCorePlugin;
 import org.eclipse.cdt.core.ICDescriptor;
-import org.eclipse.cdt.internal.core.search.indexing.IndexManager;
+import org.eclipse.cdt.core.ICDescriptorOperation;
+import org.eclipse.cdt.internal.ui.CUIMessages;
 import org.eclipse.cdt.ui.CUIPlugin;
 import org.eclipse.cdt.ui.index.AbstractIndexerPage;
 import org.eclipse.cdt.utils.ui.controls.ControlFactory;
@@ -27,8 +28,11 @@
 import org.eclipse.core.runtime.IConfigurationElement;
 import org.eclipse.core.runtime.IExtensionPoint;
 import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.NullProgressMonitor;
 import org.eclipse.core.runtime.Platform;
+import org.eclipse.core.runtime.Preferences;
 import org.eclipse.core.runtime.QualifiedName;
+import org.eclipse.core.runtime.SubProgressMonitor;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Font;
@@ -37,9 +41,6 @@
 import org.eclipse.swt.widgets.Combo;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Group;
-import org.w3c.dom.Document;
-import org.w3c.dom.Element;
-import org.w3c.dom.Node;
 
 /**
  * @author Bogdan Gheorghe
@@ -71,7 +72,8 @@
 	private Composite 				parentComposite;
     private ICOptionPage 		 	currentPage;
     
-    
+	String initialSelected;
+	
     public IndexerBlock(){
 		super(INDEXER_LABEL);
 		setDescription(INDEXER_DESCRIPTION);
@@ -104,10 +106,6 @@
         }
     }
 
-    
-    /* (non-Javadoc)
-     * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite)
-     */
     public void createControl(Composite parent) {
        
         
@@ -147,9 +145,6 @@
         }
         parent.layout(true);
     }
-
- 
-
 	/**
 	 * 
 	 */
@@ -176,7 +171,6 @@
 		setCurrentPage(page);
 	}
 
-
 	/**
 	 * @param page
 	 */
@@ -184,15 +178,15 @@
 		currentPage = page;
 	}
 
-
-
 	protected String getCurrentIndexPageId() {
         String selectedIndexPageName = getSelectedIndexerID();
         
         if (selectedIndexPageName == null)
         	return null;
         
+        
         String selectedIndexPageId = getIndexerPageId(selectedIndexPageName);
+
         return selectedIndexPageId;
     }
 	/**
@@ -239,9 +233,6 @@
         return true;
     }
     
-    
-    
-    
     /**
      * Adds all the contributed Indexer Pages to a map
      */
@@ -252,7 +243,7 @@
         IConfigurationElement[] infos = extensionPoint.getConfigurationElements();
         for (int i = 0; i < infos.length; i++) {
             if (infos[i].getName().equals("indexerUI")) { //$NON-NLS-1$
-                String id = infos[i].getAttribute("id"); //$NON-NLS-1$
+                String id = infos[i].getAttribute("indexerID"); //$NON-NLS-1$
                 indexerPageMap.put(id, new IndexerPageConfiguration(infos[i]));
             }
         }
@@ -322,10 +313,77 @@
     }
     
     public void performApply(IProgressMonitor monitor) throws CoreException {
-    	IProject newProject = null;
-		newProject = getContainer().getProject();
+		//Get the currently selected indexer from the UI
+		String indexerName = getSelectedIndexerID();
+		//If no indexer has been selected, return
+		if (indexerName == null)
+			return; 
+		
+		//Match up the selected indexer in the UI to a corresponding 
+		//contributed Indexer Page ID
+		String indexerPageID = getIndexerPageId(indexerName);
+		
+		if (indexerPageID == null)
+			return;
 	
-		persistIndexerSettings(newProject, monitor);
+		//Get the id of the indexer that goes along with this UI page - this gets persisted
+		final String indexerID = getIndexerIdName(indexerPageID);
+    	//
+    	if (monitor == null) {
+			monitor = new NullProgressMonitor();
+		}
+		monitor.beginTask(CUIMessages.getString("IndexerOptions.task.savingAttributes"), 2); //$NON-NLS-1$
+		final String selected = indexerID;
+		
+		if (indexerID != null) {
+			ICOptionContainer container = getContainer();
+			IProject project = null;
+			if (container != null){
+				project=container.getProject();
+			} else {
+				project = ((AbstractIndexerPage) currentPage).getCurrentProject();
+			}
+		
+			if ( project != null) {
+				ICDescriptorOperation op = new ICDescriptorOperation() {
+
+					public void execute(ICDescriptor descriptor, IProgressMonitor monitor) throws CoreException {
+						if (initialSelected == null || !selected.equals(initialSelected)) {
+							descriptor.remove(CCorePlugin.INDEXER_UNIQ_ID);
+							descriptor.create(CCorePlugin.INDEXER_UNIQ_ID,indexerID);
+						}
+						monitor.worked(1);
+						// Give a chance to the contributions to save.
+						// We have to do it last to make sure the indexer id
+						// is saved in .cdtproject
+						ICOptionPage page = currentPage; //egetBinaryParserPage(((BinaryParserConfiguration) selected.get(i)).getID());
+						if (page != null && page.getControl() != null) {
+							page.performApply(new SubProgressMonitor(monitor, 1));
+						}
+					
+					}
+				};
+ 				CCorePlugin.getDefault().getCDescriptorManager().runDescriptorOperation(project, op, monitor);
+			} else {
+				if (initialSelected == null || !selected.equals(initialSelected)) {
+					if (container != null){
+						Preferences store = container.getPreferences();
+						if (store != null) {
+							store.setValue(CCorePlugin.PREF_INDEXER, indexerID);
+						}
+					}
+				}
+				monitor.worked(1);
+				// Give a chance to the contributions to save.
+				ICOptionPage page = currentPage;
+				if (page != null && page.getControl() != null) {
+					page.performApply(new SubProgressMonitor(monitor, 1));
+				}
+			
+			}
+			initialSelected = selected;
+		}
+		monitor.done();
     }
 
     /**
@@ -334,21 +392,18 @@
      * property page.
      */
     public void persistIndexerSettings(IProject project, IProgressMonitor monitor) throws CoreException{
-    	
-    	persistIndexerValues(project);
-		
     	if (currentPage instanceof AbstractIndexerPage)
     		((AbstractIndexerPage)currentPage).setCurrentProject(project);
     	
-		//Give the chosen indexer a chance to persist its values
+    	this.performApply(monitor);
+		/*//Give the chosen indexer a chance to persist its values
 		if (currentPage != null){
-			currentPage.performApply(monitor);
-		}
+			currentPage.performApply(monitor);*/
+		
     }
-    
+
     public void performDefaults() {
-        // TODO Auto-generated method stub
-        
+        // TODO Auto-generated method stub     
     }
 
 	/**
@@ -359,56 +414,6 @@
 		return false;
 	}
 
-	//Storage section
-	
-	public void persistIndexerValues(IProject project){
-		ICDescriptor descriptor = null;
-		Element rootElement = null;
-		IProject newProject = null;
-		
-		//Get the currently selected indexer from the UI
-		String indexerName = getSelectedIndexerID();
-		//If no indexer has been selected, return
-		if (indexerName == null)
-			return; 
-		
-		//Match up the selected indexer in the UI to a corresponding 
-		//contributed Indexer Page ID
-		String indexerPageID = getIndexerPageId(indexerName);
-		
-		if (indexerPageID == null)
-			return;
-	
-		//Get the id of the indexer that goes along with this UI page - this gets persisted
-		String indexerID = getIndexerIdName(indexerPageID);
-		
-		try {
-			newProject = project;
-			descriptor = CCorePlugin.getDefault().getCProjectDescription(newProject, true);
-			rootElement = descriptor.getProjectData(IndexManager.CDT_INDEXER);
-		
-			// Clear out all current children
-			Node child = rootElement.getFirstChild();
-			while (child != null) {
-				rootElement.removeChild(child);
-				child = rootElement.getFirstChild();
-			}
-			Document doc = rootElement.getOwnerDocument();
-			
-			saveIndexerInfo(indexerID, indexerPageID, rootElement, doc);
-		
-			descriptor.saveProjectData();
-			
-			//Update project session property
-			
-			project.setSessionProperty(IndexManager.indexerIDKey, indexerID);	
-			project.setSessionProperty(indexerUIIDKey, indexerPageID);
-	
-		} catch (CoreException e) {
-			e.printStackTrace();
-		}
-	}
-
 	/**
 	 * @param oldIndexerID
 	 * @param project
@@ -416,7 +421,12 @@
 	public void setIndexerID(String oldIndexerID, IProject project) {
 		//Get the corresponding text for the given indexer id
 		selectedIndexerId = getIndexerPageName(oldIndexerID);
-
+		
+		if (selectedIndexerId == null){
+			CCorePlugin.getDefault().getPluginPreferences().setValue(CCorePlugin.PREF_INDEXER, CCorePlugin.DEFAULT_INDEXER_UNIQ_ID);
+			selectedIndexerId = CCorePlugin.DEFAULT_INDEXER_UNIQ_ID;
+		}
+		
 		//Set the appropriate indexer in the combo box
 		indexersComboBox.setText(selectedIndexerId);
 		//Load the appropriate page
@@ -428,19 +438,6 @@
 	}
 	
 	 
-	private static void saveIndexerInfo (String indexerID, String indexerUIID, Element rootElement, Document doc ) {
-		
-		//Save the indexer id
-		Element indexerIDElement = doc.createElement(IndexManager.INDEXER_ID);
-		indexerIDElement.setAttribute(IndexManager.INDEXER_ID_VALUE,indexerID);
-		rootElement.appendChild(indexerIDElement);
-		
-		//Save the indexer UI id
-		Element indexerUIIDElement = doc.createElement(INDEXER_UI); 
-		indexerUIIDElement.setAttribute(INDEXER_UI_VALUE,indexerUIID);
-		rootElement.appendChild(indexerUIIDElement);
-	}
-	
 	public String getSelectedIndexerID(){
 		String indexerID = null;
 		
Index: src/org/eclipse/cdt/ui/dialogs/IndexerOptionPropertyPage.java
===================================================================
RCS file: /home/tools/org.eclipse.cdt-core/org.eclipse.cdt.ui/src/org/eclipse/cdt/ui/dialogs/IndexerOptionPropertyPage.java,v
retrieving revision 1.9
diff -u -r1.9 IndexerOptionPropertyPage.java
--- src/org/eclipse/cdt/ui/dialogs/IndexerOptionPropertyPage.java	14 Mar 2005 05:31:50 -0000	1.9
+++ src/org/eclipse/cdt/ui/dialogs/IndexerOptionPropertyPage.java	21 Mar 2005 04:59:10 -0000
@@ -13,6 +13,7 @@
 
 import org.eclipse.cdt.core.CCorePlugin;
 import org.eclipse.cdt.core.ICDescriptor;
+import org.eclipse.cdt.core.ICExtensionReference;
 import org.eclipse.cdt.internal.core.search.indexing.IndexManager;
 import org.eclipse.cdt.internal.ui.ICHelpContextIds;
 import org.eclipse.core.resources.IProject;
@@ -116,23 +117,13 @@
 	}
 	
 	public String getIndexerID(IProject project) throws CoreException {
-		//See if there's already one associated with the resource for this session
-		 String indexerID = (String) project.getSessionProperty(IndexerBlock.indexerUIIDKey);
-
-		 if (indexerID != null)
-		 	return indexerID;
-		 
-		// Try to load one for the project
-		 indexerID = loadIndexerIDFromCDescriptor(project);
-		
-		// There is nothing persisted for the session, or saved in a file so
-		// create a build info object
-		if (indexerID != null) {
-			project.setSessionProperty(IndexerBlock.indexerUIIDKey, indexerID);
-		}
-		else{
-			//Hmm, no persisted indexer value. Could be an old project - need to run project
-			//update code here	
+		
+	
+		ICDescriptor desc = CCorePlugin.getDefault().getCProjectDescription(project, true);
+		ICExtensionReference[] ref = desc.get(CCorePlugin.INDEXER_UNIQ_ID);
+		String indexerID = null;
+		for (int i = 0; i < ref.length; i++) {
+			indexerID = ref[i].getID();
 		}
 		
 		return indexerID;
Index: src/org/eclipse/cdt/ui/dialogs/SourceIndexerBlock.java
===================================================================
RCS file: /home/tools/org.eclipse.cdt-core/org.eclipse.cdt.ui/src/org/eclipse/cdt/ui/dialogs/SourceIndexerBlock.java,v
retrieving revision 1.2
diff -u -r1.2 SourceIndexerBlock.java
--- src/org/eclipse/cdt/ui/dialogs/SourceIndexerBlock.java	14 Mar 2005 21:08:20 -0000	1.2
+++ src/org/eclipse/cdt/ui/dialogs/SourceIndexerBlock.java	21 Mar 2005 04:59:10 -0000
@@ -13,25 +13,29 @@
 
 import org.eclipse.cdt.core.CCorePlugin;
 import org.eclipse.cdt.core.ICDescriptor;
+import org.eclipse.cdt.core.ICExtensionReference;
 import org.eclipse.cdt.core.index.ICDTIndexer;
 import org.eclipse.cdt.internal.core.index.sourceindexer.SourceIndexer;
 import org.eclipse.cdt.internal.ui.CUIMessages;
+import org.eclipse.cdt.ui.CUIPlugin;
 import org.eclipse.cdt.ui.index.AbstractIndexerPage;
 import org.eclipse.cdt.utils.ui.controls.ControlFactory;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.NullProgressMonitor;
+import org.eclipse.core.runtime.Preferences;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Group;
-import org.w3c.dom.Document;
-import org.w3c.dom.Element;
-import org.w3c.dom.Node;
 
 
 public class SourceIndexerBlock extends AbstractIndexerPage {
 	
+	public final static String PREF_INDEX_ENABLED = CUIPlugin.PLUGIN_ID + ".indexenabled"; //$NON-NLS-1$
+	public final static String PREF_INDEX_MARKERS = CUIPlugin.PLUGIN_ID + ".indexmarkers"; //$NON-NLS-1$
+	
 	private static final String ENABLE_PREPROCESSOR_PROBLEMS = CUIMessages.getString( "IndexerOptions.enablePreprocessor" ); //$NON-NLS-1$
 	private static final String ENABLE_SEMANTIC_PROBLEMS = CUIMessages.getString( "IndexerOptions.enableSemantic" ); //$NON-NLS-1$
 	private static final String ENABLE_SYNTACTIC_PROBLEMS = CUIMessages.getString( "IndexerOptions.enableSyntactic" ); //$NON-NLS-1$
@@ -44,15 +48,63 @@
 	private Button syntacticProblemsEnabled;
 	private Button semanticProblemsEnabled;
 	
-	private boolean oldIndexerValue;
-	private int oldIndexerProblemsValue;
+	private boolean oldIndexerValue = false;
+	private int oldIndexerProblemsValue = 0;
 	
 	/* (non-Javadoc)
 	 * @see org.eclipse.cdt.ui.dialogs.ICOptionPage#performApply(org.eclipse.core.runtime.IProgressMonitor)
 	 */
 	public void performApply(IProgressMonitor monitor) throws CoreException {
 	
-		this.persistIndexerValues(currentProject);
+		if (monitor == null) {
+			monitor = new NullProgressMonitor();
+		}
+
+		monitor.beginTask(CUIMessages.getString("IndexerOptiosn.task.savingAttributes "), 1);  //$NON-NLS-1$
+		ICOptionContainer container = getContainer();
+		IProject proj = null;
+		
+		if (container != null){
+			proj = container.getProject();
+		}
+		else{
+			proj = currentProject;
+		}
+		
+		if (proj != null) {
+			ICDescriptor cdesc = CCorePlugin.getDefault().getCProjectDescription(proj, false);
+			ICExtensionReference[] cext = cdesc.get(CCorePlugin.INDEXER_UNIQ_ID);
+			if (cext.length > 0) {
+				//initializeIndexerId();
+				for (int i = 0; i < cext.length; i++) {
+					String id = cext[i].getID();
+					//if (cext[i].getID().equals(parserID)) {
+						String orig = cext[i].getExtensionData("indexenabled"); //$NON-NLS-1$
+						String indexEnabled = getIndexerEnabledString();
+						if (orig == null || !orig.equals(indexEnabled)) {
+							cext[i].setExtensionData("indexenabled", indexEnabled); //$NON-NLS-1$
+						}
+						orig = cext[i].getExtensionData("indexmarkers"); //$NON-NLS-1$
+						String indexProblems = getIndexerProblemsValuesString();
+						if (orig == null || !orig.equals(indexProblems)) {
+							cext[i].setExtensionData("indexmarkers", indexProblems); //$NON-NLS-1$
+						}
+					//}
+				}
+			}
+		} else {
+			Preferences store = null;
+			if (container != null){
+				store = container.getPreferences();
+			}
+			
+			if (store != null) {
+				String indexEnabled = getIndexerEnabledString();
+				String indexMarkers = getIndexerProblemsValuesString();
+				store.setValue(PREF_INDEX_ENABLED, indexEnabled);
+				store.setValue(PREF_INDEX_MARKERS, indexMarkers);
+			}
+		}
 		
 		boolean indexProject = getIndexerValue();
 		
@@ -102,82 +154,35 @@
 		
 	}
 	
-	public void persistIndexerValues(IProject project){
-		ICDescriptor descriptor = null;
-		Element rootElement = null;
-		IProject newProject = null;
-		
-		try {
-			newProject = project;
-			descriptor = CCorePlugin.getDefault().getCProjectDescription(newProject, true);
-			rootElement = descriptor.getProjectData(SourceIndexer.SOURCE_INDEXER);
-		
-			// Clear out all current children
-			Node child = rootElement.getFirstChild();
-			while (child != null) {
-				rootElement.removeChild(child);
-				child = rootElement.getFirstChild();
-			}
-			Document doc = rootElement.getOwnerDocument();
-	
-			boolean indexProject = getIndexerValue();
-			int problemValues = getIndexerProblemsValues();
-					
-			saveIndexerEnabled(indexProject, rootElement, doc);
-			saveIndexerProblemsEnabled( problemValues, rootElement, doc );
-			
-			descriptor.saveProjectData();
-			
-			//Update project session property
-			
-			project.setSessionProperty(SourceIndexer.activationKey,new Boolean(indexProject));
-			project.setSessionProperty(SourceIndexer.problemsActivationKey, new Integer( problemValues ));	
-	
-		} catch (CoreException e) {
-			e.printStackTrace();
-		}
-	}
-	
-	
 	public boolean getIndexerValue(){
 		return indexerEnabled.getSelection();
 	}
 	
-	public int getIndexerProblemsValues(){
+	public String getIndexerProblemsValuesString(){
 		int result = 0;
 		result |= preprocessorProblemsEnabled.getSelection() ? SourceIndexer.PREPROCESSOR_PROBLEMS_BIT : 0;
 		if( syntacticProblemsEnabled != null )
 			result |= syntacticProblemsEnabled.getSelection() ? SourceIndexer.SYNTACTIC_PROBLEMS_BIT : 0;
 		result |= semanticProblemsEnabled.getSelection() ? SourceIndexer.SEMANTIC_PROBLEMS_BIT : 0;
-		return result;
+		Integer tempInt = new Integer(result);
+		
+		return tempInt.toString();
 	}
 	
-	private static void saveIndexerEnabled (boolean indexerEnabled, Element rootElement, Document doc ) {
-		
-		Element indexEnabled = doc.createElement(SourceIndexer.INDEXER_ENABLED);
-		Boolean tempValue= new Boolean(indexerEnabled);
+	private String getIndexerEnabledString(){
+		if (indexerEnabled.getSelection())
+			return "true"; //$NON-NLS-1$
 		
-		indexEnabled.setAttribute(SourceIndexer.INDEXER_VALUE,tempValue.toString());
-		rootElement.appendChild(indexEnabled);
-
+		return "false"; //$NON-NLS-1$
 	}
-	private static void saveIndexerProblemsEnabled ( int problemValues, Element rootElement, Document doc ) {
-		
-		Element enabled = doc.createElement(SourceIndexer.INDEXER_PROBLEMS_ENABLED);
-		Integer tempValue= new Integer( problemValues );
 		
-		enabled.setAttribute(SourceIndexer.INDEXER_PROBLEMS_VALUE, tempValue.toString());
-		rootElement.appendChild(enabled);
-	}
-	
 	/* (non-Javadoc)
 	 * @see org.eclipse.cdt.ui.index2.AbstractIndexerPage#initialize(org.eclipse.core.resources.IProject)
 	 */
 	public void initialize(IProject project) {
 		
 		try {
-			oldIndexerValue = getIndexerEnabled(project);
-			oldIndexerProblemsValue = getIndexerProblemsEnabled( project );
+			loadPersistedValues(project);
 			this.currentProject = project;
 		} catch (CoreException e) {
 			e.printStackTrace();
@@ -190,53 +195,30 @@
 		setIndexerProblemValues(oldIndexerProblemsValue);
 	}
 	
-	public boolean getIndexerEnabled(IProject project) throws CoreException {
-		// See if there's already one associated with the resource for this
-		// session
-		 Boolean indexValue = (Boolean) project.getSessionProperty(SourceIndexer.activationKey);
-
-		// Try to load one for the project
-		if (indexValue == null) {
-			indexValue = loadIndexerEnabledFromCDescriptor(project);
-		}
-	
-		// There is nothing persisted for the session, or saved in a file so
-		// create a build info object
-		if (indexValue != null) {
-			project.setSessionProperty(SourceIndexer.activationKey, indexValue);
-		}
-		else{
-			//Hmm, no persisted indexer value. Could be an old project - set to true and persist
-			indexValue = new Boolean(true);
-			setIndexerValue(true);
-			persistIndexerValues(project);
-		}
+	public void loadPersistedValues(IProject project) throws CoreException {
 		
-		return indexValue.booleanValue();
-	}
-	
-	public int getIndexerProblemsEnabled( IProject project ) throws CoreException 
-	{		
-		// See if there's already one associated with the resource for this session
-		 Integer value = (Integer) project.getSessionProperty( SourceIndexer.problemsActivationKey );
-
-		// Try to load one for the project
-		if (value == null) {
-			value = loadIndexerProblemsEnabledFromCDescriptor(project);
+		ICDescriptor cdesc = CCorePlugin.getDefault().getCProjectDescription(project, false);
+		ICExtensionReference[] cext = cdesc.get(CCorePlugin.INDEXER_UNIQ_ID);
+		if (cext.length > 0) {
+			//initializeIndexerId();
+			for (int i = 0; i < cext.length; i++) {
+				String id = cext[i].getID();
+				//if (cext[i].getID().equals(parserID)) {
+					String orig = cext[i].getExtensionData("indexenabled"); //$NON-NLS-1$
+					if (orig != null){
+						Boolean tempBool = new Boolean(orig);
+						oldIndexerValue = tempBool.booleanValue();
+					}
+	
+					orig = cext[i].getExtensionData("indexmarkers"); //$NON-NLS-1$
+					if (orig != null){
+						Integer tempInt = new Integer(orig);
+						oldIndexerProblemsValue = tempInt.intValue();
+					}
+				//}
+			}
 		}
 	
-		// There is nothing persisted for the session, or saved in a file so
-		// create a build info object
-		if (value != null) {
-			project.setSessionProperty(SourceIndexer.problemsActivationKey, value);
-		} else {
-			//Hmm, no persisted indexer value. Could be an old project - set all to false and persist
-			value = new Integer( 0 );
-			setIndexerProblemValues( 0 );
-			persistIndexerValues(project);
-		}
-		
-		return value.intValue();
 	}
 	
 	public void setIndexerValue(boolean value){
@@ -250,55 +232,4 @@
 		semanticProblemsEnabled.setSelection( (value & SourceIndexer.SEMANTIC_PROBLEMS_BIT) != 0 );
 	}
 	
-	/**
-	 * Loads dis from .cdtproject file
-	 * @param project
-	 * @param includes
-	 * @param symbols
-	 * @throws CoreException
-	 */
-	private Boolean loadIndexerEnabledFromCDescriptor(IProject project) throws CoreException {
-		ICDescriptor descriptor = CCorePlugin.getDefault().getCProjectDescription(project, true);
-		
-		Node child = descriptor.getProjectData(SourceIndexer.SOURCE_INDEXER).getFirstChild();
-		Boolean strBool = null;
-		
-		while (child != null) {
-			if (child.getNodeName().equals(SourceIndexer.INDEXER_ENABLED)) 
-				 strBool = Boolean.valueOf(((Element)child).getAttribute(SourceIndexer.INDEXER_VALUE));
-			
-			
-			child = child.getNextSibling();
-		}
-		
-		return strBool;
-	}
-	
-	private Integer loadIndexerProblemsEnabledFromCDescriptor( IProject project ) throws CoreException
-	{
-		ICDescriptor descriptor = CCorePlugin.getDefault().getCProjectDescription(project, true);
-		
-		Node child = descriptor.getProjectData(SourceIndexer.SOURCE_INDEXER).getFirstChild();
-		Integer strInt = null;
-		
-		while (child != null) {
-			if (child.getNodeName().equals(SourceIndexer.INDEXER_PROBLEMS_ENABLED)) {
-				String val = ((Element)child).getAttribute(SourceIndexer.INDEXER_PROBLEMS_VALUE);
-				try{
-					strInt = Integer.valueOf( val );
-				} catch( NumberFormatException e ){
-					//some old projects might have a boolean stored, translate that into just preprocessors
-					Boolean bool = Boolean.valueOf( val );
-					if( bool.booleanValue() )
-						strInt = new Integer( SourceIndexer.PREPROCESSOR_PROBLEMS_BIT );
-					else 
-						strInt = new Integer( 0 );
-				}
-				break;
-			}
-			
-			child = child.getNextSibling();
-		}
-		return strInt;
-	}
 }

Index: src/org/eclipse/cdt/managedbuilder/internal/core/ManagedMakeProject.java
===================================================================
RCS file: /home/tools/org.eclipse.cdt-build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/ManagedMakeProject.java,v
retrieving revision 1.1
diff -u -r1.1 ManagedMakeProject.java
--- src/org/eclipse/cdt/managedbuilder/internal/core/ManagedMakeProject.java	24 Jun 2004 15:57:05 -0000	1.1
+++ src/org/eclipse/cdt/managedbuilder/internal/core/ManagedMakeProject.java	21 Mar 2005 04:58:54 -0000
@@ -11,10 +11,14 @@
 
 package org.eclipse.cdt.managedbuilder.internal.core;
 
+import java.util.ArrayList;
+import java.util.StringTokenizer;
+
 import org.eclipse.cdt.core.CCorePlugin;
 import org.eclipse.cdt.core.ICDescriptor;
 import org.eclipse.cdt.core.ICOwner;
 import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.Preferences;
 
 /**
  * @since 2.0
@@ -36,6 +40,8 @@
 		cproject.remove(CCorePlugin.BUILD_SCANNER_INFO_UNIQ_ID);
 		cproject.remove(CCorePlugin.BUILDER_MODEL_ID);
 		cproject.remove(CCorePlugin.BINARY_PARSER_UNIQ_ID);
+		
+		updateIndexers(cproject);
 	}
 
 	/* (non-Javadoc)
@@ -43,10 +49,37 @@
 	 */
 	public void update(ICDescriptor cproject, String extensionID)
 			throws CoreException {
-		// TODO Auto-generated method stub
+		
+		if (extensionID.equals(CCorePlugin.INDEXER_UNIQ_ID)) {
+			updateIndexers(cproject);
+		}
 
 	}
 	
 	private void updateBinaryParsers(ICDescriptor cproject) throws CoreException {
+	}
+	
+	private void updateIndexers(ICDescriptor cDescriptor) throws CoreException {
+		cDescriptor.remove(CCorePlugin.INDEXER_UNIQ_ID);
+		Preferences corePrefs = CCorePlugin.getDefault().getPluginPreferences();
+		String id = corePrefs.getString(CCorePlugin.PREF_INDEXER);
+		if (id != null && id.length() != 0) {
+			String[] ids = parseStringToArray(id);
+			for (int i = 0; i < ids.length; i++) {
+				cDescriptor.create(CCorePlugin.INDEXER_UNIQ_ID, ids[i]);
+			}
+		}
+	}
+	
+	private String[] parseStringToArray(String syms) {
+		if (syms != null && syms.length() > 0) {
+			StringTokenizer tok = new StringTokenizer(syms, ";"); //$NON-NLS-1$
+			ArrayList list = new ArrayList(tok.countTokens());
+			while (tok.hasMoreElements()) {
+				list.add(tok.nextToken());
+			}
+			return (String[]) list.toArray(new String[list.size()]);
+		}
+		return new String[0];
 	}
 }