| [OCL-Java] java.lang.NoClassDefFoundError: lpg/runtime/RuleAction [message #632093] |
Mon, 11 October 2010 14:27  |
 Dave 
Messages: 37
Registered: September 2010 |
Member |
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Hi all,
I'm working on a Java project that must execute some OCL Queries on an Ecore model.
I've written the foolowing class for trying a simple OCL Query execution:
import java.io.IOException;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EClassifier;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.impl.ResourceImpl;
import org.eclipse.emf.query.conditions.Condition;
import org.eclipse.emf.query.conditions.eobjects.EObjectCondition;
import org.eclipse.emf.query.ocl.conditions.BooleanOCLCondition;
import org.eclipse.emf.query.statements.FROM;
import org.eclipse.emf.query.statements.IQueryResult;
import org.eclipse.emf.query.statements.SELECT;
import org.eclipse.emf.query.statements.WHERE;
import org.eclipse.ocl.ParserException;
import org.eclipse.ocl.ecore.EcoreEnvironmentFactory;
import org.eclipse.ocl.ecore.OCL;
public class QueryExecutor {
/**
* The method thats execute ocl queries
* @param query the ocl query that must be executed
*/
public static IQueryResult execute(Resource ecoreResource, String query) {
OCL ocl = OCL.newInstance(EcoreEnvironmentFactory.INSTANCE);
Condition condition;
IQueryResult results = null;
try {
condition = new BooleanOCLCondition<EClassifier, EClass, EObject>(ocl.getEnvironment(),query,null);
SELECT statement = new SELECT(SELECT.UNBOUNDED, false,
new FROM(ecoreResource.getContents()), new WHERE((EObjectCondition) condition) );
results = statement.execute();
} catch (ParserException e) {
e.printStackTrace();
}
return results;
}
public static void main(String[] args) {
Resource ecoreResource = new ResourceImpl();
ecoreResource.setURI(org.eclipse.emf.common.util.URI.createFileURI("systemModel2.ecore")); //systemModel.ecore is the ecore model on which an col query is executed
System.out.println(ecoreResource.toString());
IQueryResult res = execute(ecoreResource, "self->debug('self')");
System.out.println(res.toString());
}
}
but it returns the error:
Exception in thread "main" java.lang.NoClassDefFoundError: lpg/runtime/RuleAction
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
at java.security.SecureClassLoader.defineClass(SecureClassLoade r.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301 )
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at failuresdetector.QueryExecutor.execute(QueryExecutor.java:35 )
at failuresdetector.QueryExecutor.main(QueryExecutor.java:51)
Caused by: java.lang.ClassNotFoundException: lpg.runtime.RuleAction
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301 )
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
... 14 more
Investigating on the web, I relized that this happens when the lpg Java Runtime library library is missing, but I've added this library to my project. In fact, its Java Build Path includes the file net.sourceforge.lpg.lpgjavaruntime_1.1.0.v201004271650.jar .
So, I don't know what's the problem. Anyone could help me, please?
Many thanks in advance,
Dave.
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