plugins/org.eclipse.acceleo.common.ide/src/org/eclipse/acceleo/common/ide/AcceleoCommonIDEPlugin.java - acceleo/org.eclipse.acceleo - Git at Google

 /*******************************************************************************
  * Copyright (c) 2015 Obeo.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     Obeo - initial API and implementation
  *******************************************************************************/
 package org.eclipse.acceleo.common.ide;

 import java.util.ArrayList;
 import java.util.List;

 import org.eclipse.acceleo.common.AcceleoCommonPlugin;
 import org.eclipse.acceleo.common.IAcceleoConstants;
 import org.eclipse.acceleo.common.ide.authoring.AcceleoModelManager;
 import org.eclipse.acceleo.common.internal.utils.AcceleoDynamicMetamodelResourceSetImpl;
 import org.eclipse.acceleo.common.internal.utils.AcceleoPackageRegistry;
 import org.eclipse.core.resources.IContainer;
 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IResourceChangeEvent;
 import org.eclipse.core.resources.IResourceChangeListener;
 import org.eclipse.core.resources.IResourceDelta;
 import org.eclipse.core.resources.IResourceVisitor;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.Platform;
 import org.osgi.framework.Bundle;
 import org.osgi.framework.BundleActivator;
 import org.osgi.framework.BundleContext;

 /**
  * Plugin activator for the common IDE plugin of Acceleo.
  *
  * @author <a href="mailto:cedric.brun@obeo.fr">Cedric Brun</a>
  * @since 3.6
  */
 public class AcceleoCommonIDEPlugin implements BundleActivator {

 	/** Listener tracking changes with the workspace ecore files. */
 	private final WorkspaceEcoreListener workspaceEcoreListener = new WorkspaceEcoreListener();

 	@Override
 	public void start(BundleContext context) throws Exception {
 		Bundle pdeCoreBundle = Platform.getBundle("org.eclipse.pde.core"); //$NON-NLS-1$
 		if (pdeCoreBundle != null) {
 			ResourcesPlugin.getWorkspace().addResourceChangeListener(
 					workspaceEcoreListener,
 					IResourceChangeEvent.PRE_CLOSE | IResourceChangeEvent.PRE_DELETE
 							| IResourceChangeEvent.POST_CHANGE);
 		}

 		ResourcesPlugin.getWorkspace().getRoot().accept(new IResourceVisitor() {

 			public boolean visit(IResource resource) throws CoreException {
 				if (resource instanceof IFile) {
 					if (resource instanceof IFile
 							&& ((IFile)resource).getFileExtension() != null
 							&& ((IFile)resource).getFileExtension().equals(
 									IAcceleoConstants.ECORE_FILE_EXTENSION)) {
 						if (mightBeInAcceleoScope((IFile)resource)) {
 							org.eclipse.emf.common.util.URI uri = org.eclipse.emf.common.util.URI
 									.createPlatformResourceURI(resource.getFullPath().toString(), true);
 							AcceleoPackageRegistry.INSTANCE.registerEcorePackages(uri.toString(),
 									AcceleoDynamicMetamodelResourceSetImpl.DYNAMIC_METAMODEL_RESOURCE_SET);
 						}
 					}
 				}
 				return true;
 			}
 		});

 		AcceleoModelManager.getManager().startup();
 	}

 	@Override
 	public void stop(BundleContext context) throws Exception {
 		Bundle pdeCoreBundle = Platform.getBundle("org.eclipse.pde.core"); //$NON-NLS-1$
 		if (pdeCoreBundle != null) {
 			ResourcesPlugin.getWorkspace().removeResourceChangeListener(workspaceEcoreListener);
 		}
 		AcceleoModelManager.getManager().shutdown();
 	}

 	/**
 	 * return true if the given ecore file might be used by an Acceleo generator meaning : it is at least in a
 	 * plugin project.
 	 *
 	 * @param ecoreFile
 	 *            an IFile which is a .ecore.
 	 * @return true if the given ecore file might be used by an Acceleo generator meaning : it is at least in
 	 *         a plugin project.
 	 */
 	private boolean mightBeInAcceleoScope(IFile ecoreFile) {
 		try {
 			if (ecoreFile.getProject() != null && ecoreFile.getProject().getDescription() != null) {
 				for (String nature : ecoreFile.getProject().getDescription().getNatureIds()) {
 					if (IAcceleoConstants.PLUGIN_NATURE_ID.equals(nature)) {
 						return true;
 					}
 				}
 			}
 		} catch (CoreException e) {
 			/*
 			 * If there is a problem accessing the project description we probably just want to ignore this
 			 * file.
 			 */
 		}

 		return false;
 	}

 	/**
 	 * Allows us to react to changes in the dynamic ecore models.
 	 *
 	 * @author <a href="mailto:laurent.goubet@obeo.fr">Laurent Goubet</a>
 	 */
 	private class WorkspaceEcoreListener implements IResourceChangeListener {
 		/**
 		 * Default constructor.
 		 */
 		WorkspaceEcoreListener() {
 			// Increases visibility
 		}

 		/**
 		 * {@inheritDoc}
 		 *
 		 * @see org.eclipse.core.resources.IResourceChangeListener#resourceChanged(org.eclipse.core.resources.IResourceChangeEvent)
 		 */
 		public void resourceChanged(IResourceChangeEvent event) {
 			switch (event.getType()) {
 			/*
 			 * Project closing and deletion must trigger the removal of its models from the dynamic registry.
 			 * Model deletion must trigger its removal from the dynamic registry. Model change must trigger
 			 * its removal and re-adding in the registry. Model creation must trigger its addition in the
 			 * registry.
 			 */
 				case IResourceChangeEvent.PRE_CLOSE:
 				case IResourceChangeEvent.PRE_DELETE:
 					if (event.getResource() instanceof IProject) {
 						try {
 							List<IFile> ecoreFiles = members((IContainer)event.getResource(),
 									IAcceleoConstants.ECORE_FILE_EXTENSION);
 							if (!ecoreFiles.isEmpty()) {
 								for (IFile ecoreFile : ecoreFiles) {
 									AcceleoPackageRegistry.INSTANCE.unregisterEcorePackages(ecoreFile
 											.getFullPath().toString());
 								}
 							}
 						} catch (CoreException e) {
 							AcceleoCommonPlugin.log(e, false);
 						}
 					}
 					break;
 				case IResourceChangeEvent.POST_CHANGE:
 					IResource resource = null;
 					if (event.getResource() != null) {
 						resource = event.getResource();
 					} else if (getResources(event.getDelta()).size() > 0) {
 						List<IResource> resources = getResources(event.getDelta());
 						resource = resources.get(0);
 					}
 					if (resource != null && resource.isAccessible() && resource.getFileExtension() != null
 							&& resource.getFileExtension().endsWith(IAcceleoConstants.ECORE_FILE_EXTENSION)) {
 						if (resource instanceof IFile && mightBeInAcceleoScope((IFile)resource)) {
 							org.eclipse.emf.common.util.URI uri = org.eclipse.emf.common.util.URI
 									.createPlatformResourceURI(resource.getFullPath().toString(), true);
 							AcceleoPackageRegistry.INSTANCE.registerEcorePackages(uri.toString(),
 									AcceleoDynamicMetamodelResourceSetImpl.DYNAMIC_METAMODEL_RESOURCE_SET);
 						}
 					}
 					break;
 				default:
 					// no default action
 			}
 		}

 		/**
 		 * Computes the resources available in a resource delta.
 		 *
 		 * @param delta
 		 *            the resource delta.
 		 * @return The lsit of resources in a resource delta.
 		 */
 		private List<IResource> getResources(IResourceDelta delta) {
 			List<IResource> resources = new ArrayList<IResource>();
 			IResourceDelta[] affectedChildren = delta.getAffectedChildren();
 			for (IResourceDelta iResourceDelta : affectedChildren) {
 				IResource resource = iResourceDelta.getResource();
 				if (resource instanceof IFile
 						&& ((IFile)resource).getFileExtension() != null
 						&& ((IFile)resource).getFileExtension()
 								.equals(IAcceleoConstants.ECORE_FILE_EXTENSION)) {
 					resources.add(resource);
 				}

 				resources.addAll(getResources(iResourceDelta));
 			}
 			return resources;
 		}

 		/**
 		 * Returns a list of existing member files (that validate the file extension) in this resource.
 		 *
 		 * @param container
 		 *            The container to browse for files with the given extension.
 		 * @param extension
 		 *            The file extension to browse for.
 		 * @return The List of files of the given extension contained by <code>container</code>.
 		 * @throws CoreException
 		 *             Thrown if we couldn't retrieve the children of <code>container</code>.
 		 */
 		private List<IFile> members(IContainer container, String extension) throws CoreException {
 			List<IFile> output = new ArrayList<IFile>();
 			if (container != null && container.isAccessible()) {
 				IResource[] children = container.members();
 				if (children != null) {
 					for (int i = 0; i < children.length; ++i) {
 						IResource resource = children[i];
 						if (resource instanceof IFile
 								&& extension.equals(((IFile)resource).getFileExtension())) {
 							output.add((IFile)resource);
 						} else if (resource instanceof IContainer) {
 							output.addAll(members((IContainer)resource, extension));
 						}
 					}
 				}
 			}
 			return output;
 		}
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2015 Obeo.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* Obeo - initial API and implementation
	*******************************************************************************/
	package org.eclipse.acceleo.common.ide;

	import java.util.ArrayList;
	import java.util.List;

	import org.eclipse.acceleo.common.AcceleoCommonPlugin;
	import org.eclipse.acceleo.common.IAcceleoConstants;
	import org.eclipse.acceleo.common.ide.authoring.AcceleoModelManager;
	import org.eclipse.acceleo.common.internal.utils.AcceleoDynamicMetamodelResourceSetImpl;
	import org.eclipse.acceleo.common.internal.utils.AcceleoPackageRegistry;
	import org.eclipse.core.resources.IContainer;
	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.resources.IResourceChangeEvent;
	import org.eclipse.core.resources.IResourceChangeListener;
	import org.eclipse.core.resources.IResourceDelta;
	import org.eclipse.core.resources.IResourceVisitor;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.Platform;
	import org.osgi.framework.Bundle;
	import org.osgi.framework.BundleActivator;
	import org.osgi.framework.BundleContext;

	/**
	* Plugin activator for the common IDE plugin of Acceleo.
	*
	* @author <a href="mailto:cedric.brun@obeo.fr">Cedric Brun</a>
	* @since 3.6
	*/
	public class AcceleoCommonIDEPlugin implements BundleActivator {

	/** Listener tracking changes with the workspace ecore files. */
	private final WorkspaceEcoreListener workspaceEcoreListener = new WorkspaceEcoreListener();

	@Override
	public void start(BundleContext context) throws Exception {
	Bundle pdeCoreBundle = Platform.getBundle("org.eclipse.pde.core"); //$NON-NLS-1$
	if (pdeCoreBundle != null) {
	ResourcesPlugin.getWorkspace().addResourceChangeListener(
	workspaceEcoreListener,
	IResourceChangeEvent.PRE_CLOSE \| IResourceChangeEvent.PRE_DELETE
	\| IResourceChangeEvent.POST_CHANGE);
	}

	ResourcesPlugin.getWorkspace().getRoot().accept(new IResourceVisitor() {

	public boolean visit(IResource resource) throws CoreException {
	if (resource instanceof IFile) {
	if (resource instanceof IFile
	&& ((IFile)resource).getFileExtension() != null
	&& ((IFile)resource).getFileExtension().equals(
	IAcceleoConstants.ECORE_FILE_EXTENSION)) {
	if (mightBeInAcceleoScope((IFile)resource)) {
	org.eclipse.emf.common.util.URI uri = org.eclipse.emf.common.util.URI
	.createPlatformResourceURI(resource.getFullPath().toString(), true);
	AcceleoPackageRegistry.INSTANCE.registerEcorePackages(uri.toString(),
	AcceleoDynamicMetamodelResourceSetImpl.DYNAMIC_METAMODEL_RESOURCE_SET);
	}
	}
	}
	return true;
	}
	});

	AcceleoModelManager.getManager().startup();
	}

	@Override
	public void stop(BundleContext context) throws Exception {
	Bundle pdeCoreBundle = Platform.getBundle("org.eclipse.pde.core"); //$NON-NLS-1$
	if (pdeCoreBundle != null) {
	ResourcesPlugin.getWorkspace().removeResourceChangeListener(workspaceEcoreListener);
	}
	AcceleoModelManager.getManager().shutdown();
	}

	/**
	* return true if the given ecore file might be used by an Acceleo generator meaning : it is at least in a
	* plugin project.
	*
	* @param ecoreFile
	* an IFile which is a .ecore.
	* @return true if the given ecore file might be used by an Acceleo generator meaning : it is at least in
	* a plugin project.
	*/
	private boolean mightBeInAcceleoScope(IFile ecoreFile) {
	try {
	if (ecoreFile.getProject() != null && ecoreFile.getProject().getDescription() != null) {
	for (String nature : ecoreFile.getProject().getDescription().getNatureIds()) {
	if (IAcceleoConstants.PLUGIN_NATURE_ID.equals(nature)) {
	return true;
	}
	}
	}
	} catch (CoreException e) {
	/*
	* If there is a problem accessing the project description we probably just want to ignore this
	* file.
	*/
	}

	return false;
	}

	/**
	* Allows us to react to changes in the dynamic ecore models.
	*
	* @author <a href="mailto:laurent.goubet@obeo.fr">Laurent Goubet</a>
	*/
	private class WorkspaceEcoreListener implements IResourceChangeListener {
	/**
	* Default constructor.
	*/
	WorkspaceEcoreListener() {
	// Increases visibility
	}

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.core.resources.IResourceChangeListener#resourceChanged(org.eclipse.core.resources.IResourceChangeEvent)
	*/
	public void resourceChanged(IResourceChangeEvent event) {
	switch (event.getType()) {
	/*
	* Project closing and deletion must trigger the removal of its models from the dynamic registry.
	* Model deletion must trigger its removal from the dynamic registry. Model change must trigger
	* its removal and re-adding in the registry. Model creation must trigger its addition in the
	* registry.
	*/
	case IResourceChangeEvent.PRE_CLOSE:
	case IResourceChangeEvent.PRE_DELETE:
	if (event.getResource() instanceof IProject) {
	try {
	List<IFile> ecoreFiles = members((IContainer)event.getResource(),
	IAcceleoConstants.ECORE_FILE_EXTENSION);
	if (!ecoreFiles.isEmpty()) {
	for (IFile ecoreFile : ecoreFiles) {
	AcceleoPackageRegistry.INSTANCE.unregisterEcorePackages(ecoreFile
	.getFullPath().toString());
	}
	}
	} catch (CoreException e) {
	AcceleoCommonPlugin.log(e, false);
	}
	}
	break;
	case IResourceChangeEvent.POST_CHANGE:
	IResource resource = null;
	if (event.getResource() != null) {
	resource = event.getResource();
	} else if (getResources(event.getDelta()).size() > 0) {
	List<IResource> resources = getResources(event.getDelta());
	resource = resources.get(0);
	}
	if (resource != null && resource.isAccessible() && resource.getFileExtension() != null
	&& resource.getFileExtension().endsWith(IAcceleoConstants.ECORE_FILE_EXTENSION)) {
	if (resource instanceof IFile && mightBeInAcceleoScope((IFile)resource)) {
	org.eclipse.emf.common.util.URI uri = org.eclipse.emf.common.util.URI
	.createPlatformResourceURI(resource.getFullPath().toString(), true);
	AcceleoPackageRegistry.INSTANCE.registerEcorePackages(uri.toString(),
	AcceleoDynamicMetamodelResourceSetImpl.DYNAMIC_METAMODEL_RESOURCE_SET);
	}
	}
	break;
	default:
	// no default action
	}
	}

	/**
	* Computes the resources available in a resource delta.
	*
	* @param delta
	* the resource delta.
	* @return The lsit of resources in a resource delta.
	*/
	private List<IResource> getResources(IResourceDelta delta) {
	List<IResource> resources = new ArrayList<IResource>();
	IResourceDelta[] affectedChildren = delta.getAffectedChildren();
	for (IResourceDelta iResourceDelta : affectedChildren) {
	IResource resource = iResourceDelta.getResource();
	if (resource instanceof IFile
	&& ((IFile)resource).getFileExtension() != null
	&& ((IFile)resource).getFileExtension()
	.equals(IAcceleoConstants.ECORE_FILE_EXTENSION)) {
	resources.add(resource);
	}

	resources.addAll(getResources(iResourceDelta));
	}
	return resources;
	}

	/**
	* Returns a list of existing member files (that validate the file extension) in this resource.
	*
	* @param container
	* The container to browse for files with the given extension.
	* @param extension
	* The file extension to browse for.
	* @return The List of files of the given extension contained by <code>container</code>.
	* @throws CoreException
	* Thrown if we couldn't retrieve the children of <code>container</code>.
	*/
	private List<IFile> members(IContainer container, String extension) throws CoreException {
	List<IFile> output = new ArrayList<IFile>();
	if (container != null && container.isAccessible()) {
	IResource[] children = container.members();
	if (children != null) {
	for (int i = 0; i < children.length; ++i) {
	IResource resource = children[i];
	if (resource instanceof IFile
	&& extension.equals(((IFile)resource).getFileExtension())) {
	output.add((IFile)resource);
	} else if (resource instanceof IContainer) {
	output.addAll(members((IContainer)resource, extension));
	}
	}
	}
	}
	return output;
	}
	}

	}