| 1 | /******************************************************************************* |
| 2 | * Copyright (c) 2000, 2006 IBM Corporation and others. |
| 3 | * All rights reserved. This program and the accompanying materials |
| 4 | * are made available under the terms of the Eclipse Public License v1.0 |
| 5 | * which accompanies this distribution, and is available at |
| 6 | * http://www.eclipse.org/legal/epl-v10.html |
| 7 | * |
| 8 | * Contributors: |
| 9 | * IBM Corporation - initial API and implementation |
| 10 | *******************************************************************************/ |
| 11 | package org.eclipse.ui.internal.ide.model; |
| 12 | |
| 13 | import org.eclipse.core.commands.operations.IUndoContext; |
| 14 | import org.eclipse.core.resources.IMarker; |
| 15 | import org.eclipse.core.resources.IResource; |
| 16 | import org.eclipse.core.resources.IWorkspace; |
| 17 | import org.eclipse.core.resources.IWorkspaceRoot; |
| 18 | import org.eclipse.core.runtime.IAdapterFactory; |
| 19 | import org.eclipse.ui.IActionFilter; |
| 20 | import org.eclipse.ui.IElementFactory; |
| 21 | import org.eclipse.ui.IPersistableElement; |
| 22 | import org.eclipse.ui.PlatformUI; |
| 23 | import org.eclipse.ui.model.IWorkbenchAdapter; |
| 24 | |
| 25 | /** |
| 26 | * Dispenses adapters for various core objects. |
| 27 | * Returns IWorkbenchAdapter adapters, used for displaying, |
| 28 | * navigating, and populating menus for core objects. |
| 29 | */ |
| 30 | class WorkbenchAdapterFactory implements IAdapterFactory { |
| 31 | private Object workspaceAdapter = new WorkbenchWorkspace(); |
| 32 | |
| 33 | private Object rootAdapter = new WorkbenchRootResource(); |
| 34 | |
| 35 | private Object projectAdapter = new WorkbenchProject(); |
| 36 | |
| 37 | private Object folderAdapter = new WorkbenchFolder(); |
| 38 | |
| 39 | private Object fileAdapter = new WorkbenchFile(); |
| 40 | |
| 41 | private Object markerAdapter = new WorkbenchMarker(); |
| 42 | |
| 43 | private Object resourceFactory = new ResourceFactory(); |
| 44 | |
| 45 | private Object workspaceFactory = new WorkspaceFactory(); |
| 46 | |
| 47 | /** |
| 48 | * Returns the IActionFilter for an object. |
| 49 | */ |
| 50 | protected Object getActionFilter(Object o) { |
| 51 | if (o instanceof IResource) { |
| 52 | switch (((IResource) o).getType()) { |
| 53 | case IResource.FILE: |
| 54 | return fileAdapter; |
| 55 | case IResource.FOLDER: |
| 56 | return folderAdapter; |
| 57 | case IResource.PROJECT: |
| 58 | return projectAdapter; |
| 59 | } |
| 60 | } |
| 61 | if (o instanceof IMarker) { |
| 62 | return markerAdapter; |
| 63 | } |
| 64 | return null; |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * Returns an object which is an instance of the given class |
| 69 | * associated with the given object. Returns <code>null</code> if |
| 70 | * no such object can be found. |
| 71 | * |
| 72 | * @param o the adaptable object being queried |
| 73 | * (usually an instance of <code>IAdaptable</code>) |
| 74 | * @param adapterType the type of adapter to look up |
| 75 | * @return a object castable to the given adapter type, |
| 76 | * or <code>null</code> if this adapter provider |
| 77 | * does not have an adapter of the given type for the |
| 78 | * given object |
| 79 | */ |
| 80 | public Object getAdapter(Object o, Class adapterType) { |
| 81 | if (adapterType.isInstance(o)) { |
| 82 | return o; |
| 83 | } |
| 84 | if (adapterType == IWorkbenchAdapter.class) { |
| 85 | return getWorkbenchElement(o); |
| 86 | } |
| 87 | if (adapterType == IPersistableElement.class) { |
| 88 | return getPersistableElement(o); |
| 89 | } |
| 90 | if (adapterType == IElementFactory.class) { |
| 91 | return getElementFactory(o); |
| 92 | } |
| 93 | if (adapterType == IActionFilter.class) { |
| 94 | return getActionFilter(o); |
| 95 | } |
| 96 | if (adapterType == IUndoContext.class) { |
| 97 | return getUndoContext(o); |
| 98 | } |
| 99 | return null; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Returns the collection of adapter types handled by this |
| 104 | * provider. |
| 105 | * <p> |
| 106 | * This method is generally used by an adapter manager |
| 107 | * to discover which adapter types are supported, in advance |
| 108 | * of dispatching any actual <code>getAdapter</code> requests. |
| 109 | * </p> |
| 110 | * |
| 111 | * @return the collection of adapter types |
| 112 | */ |
| 113 | public Class[] getAdapterList() { |
| 114 | return new Class[] { IWorkbenchAdapter.class, IElementFactory.class, |
| 115 | IPersistableElement.class, IActionFilter.class, IUndoContext.class }; |
| 116 | } |
| 117 | |
| 118 | /** |
| 119 | * Returns an object which is an instance of IElementFactory |
| 120 | * associated with the given object. Returns <code>null</code> if |
| 121 | * no such object can be found. |
| 122 | */ |
| 123 | protected Object getElementFactory(Object o) { |
| 124 | if (o instanceof IResource) { |
| 125 | return resourceFactory; |
| 126 | } |
| 127 | if (o instanceof IWorkspace) { |
| 128 | return workspaceFactory; |
| 129 | } |
| 130 | return null; |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Returns an object which is an instance of IPersistableElement |
| 135 | * associated with the given object. Returns <code>null</code> if |
| 136 | * no such object can be found. |
| 137 | */ |
| 138 | protected Object getPersistableElement(Object o) { |
| 139 | if (o instanceof IResource) { |
| 140 | return new ResourceFactory((IResource) o); |
| 141 | } |
| 142 | if (o instanceof IWorkspace) { |
| 143 | return workspaceFactory; |
| 144 | } |
| 145 | return null; |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Returns an object which is an instance of IWorkbenchAdapter |
| 150 | * associated with the given object. Returns <code>null</code> if |
| 151 | * no such object can be found. |
| 152 | */ |
| 153 | protected Object getWorkbenchElement(Object o) { |
| 154 | if (o instanceof IResource) { |
| 155 | switch (((IResource) o).getType()) { |
| 156 | case IResource.FILE: |
| 157 | return fileAdapter; |
| 158 | case IResource.FOLDER: |
| 159 | return folderAdapter; |
| 160 | case IResource.PROJECT: |
| 161 | return projectAdapter; |
| 162 | } |
| 163 | } |
| 164 | if (o instanceof IWorkspaceRoot) { |
| 165 | return rootAdapter; |
| 166 | } |
| 167 | if (o instanceof IWorkspace) { |
| 168 | return workspaceAdapter; |
| 169 | } |
| 170 | if (o instanceof IMarker) { |
| 171 | return markerAdapter; |
| 172 | } |
| 173 | return null; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Returns the IUndoContext for an object. |
| 178 | */ |
| 179 | protected Object getUndoContext(Object o) { |
| 180 | if (o instanceof IWorkspace) { |
| 181 | return PlatformUI.getWorkbench().getOperationSupport().getUndoContext(); |
| 182 | } |
| 183 | return null; |
| 184 | } |
| 185 | } |