jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/resource/AbstractXmlResourceProvider.java - dali/webtools.dali - Git at Google

 /*******************************************************************************
  * Copyright (c) 2008, 2009 Oracle. 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:
  *     Oracle - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jpt.core.resource;

 import java.io.IOException;
 import java.util.Collections;
 import java.util.List;
 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IWorkspace;
 import org.eclipse.core.resources.IWorkspaceRunnable;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.Assert;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.ISafeRunnable;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.core.runtime.SafeRunner;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.core.runtime.content.IContentType;
 import org.eclipse.emf.common.notify.Notification;
 import org.eclipse.emf.common.notify.impl.AdapterImpl;
 import org.eclipse.emf.common.util.EList;
 import org.eclipse.emf.common.util.URI;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.emf.ecore.resource.Resource;
 import org.eclipse.emf.ecore.resource.URIConverter;
 import org.eclipse.jem.util.emf.workbench.FlexibleProjectResourceSet;
 import org.eclipse.jem.util.emf.workbench.ProjectResourceSet;
 import org.eclipse.jem.util.emf.workbench.WorkbenchResourceHelperBase;
 import org.eclipse.jpt.core.JptCorePlugin;
 import org.eclipse.jpt.core.resource.xml.JpaXmlResource;
 import org.eclipse.jpt.utility.internal.ListenerList;
 import org.eclipse.wst.common.componentcore.internal.impl.ModuleURIUtil;
 import org.eclipse.wst.common.componentcore.internal.impl.PlatformURLModuleConnection;
 import org.eclipse.wst.common.componentcore.internal.impl.WTPResourceFactoryRegistry;
 import org.eclipse.wst.common.internal.emfworkbench.WorkbenchResourceHelper;
 import org.eclipse.wst.common.internal.emfworkbench.validateedit.ResourceStateInputProvider;
 import org.eclipse.wst.common.internal.emfworkbench.validateedit.ResourceStateValidator;
 import org.eclipse.wst.common.internal.emfworkbench.validateedit.ResourceStateValidatorImpl;
 import org.eclipse.wst.common.internal.emfworkbench.validateedit.ResourceStateValidatorPresenter;

 /**
  * Provisional API: This interface is part of an interim API that is still
  * under development and expected to change significantly before reaching
  * stability. It is available at this early stage to solicit feedback from
  * pioneering adopters on the understanding that any code that uses this API
  * will almost certainly be broken (repeatedly) as the API evolves.
  */
 public abstract class AbstractXmlResourceProvider
 	implements JpaXmlResourceProvider, ResourceStateInputProvider, ResourceStateValidator
 {
 	protected IProject project;

 	protected URI fileUri;

 	protected JpaXmlResource resource;

 	protected IContentType contentType;

 	protected final ResourceAdapter resourceAdapter = new ResourceAdapter();

 	protected final ListenerList<JpaXmlResourceProviderListener> listenerList = new ListenerList<JpaXmlResourceProviderListener>(JpaXmlResourceProviderListener.class);

 	protected ResourceStateValidator stateValidator;


 	/**
 	 * Create a new AbstractResourceModelProvider for the given project and
 	 * resourcePath.  The resourcePath may be either a) an absolute platform
 	 * resource path (e.g. "MyProject/src/META-INF/foobar.xml") or b) a relative
 	 * deploy path (e.g. "META-INF/foobar.xml".)  In either case,
 	 * {@link #buildFileUri(IPath)} will attempt to build an absolutely pathed
 	 * URI for the given path.
 	 */
 	public AbstractXmlResourceProvider(IProject project, IPath resourcePath, IContentType contentType) {
 		super();
 		this.project = project;
 		this.fileUri = buildFileUri(resourcePath);
 		this.contentType = contentType;
 	}

 	protected URI buildFileUri(IPath resourcePath) {
 		URI resourceUri = null;

 		if (resourcePath.isAbsolute()) {
 			resourceUri = URI.createPlatformResourceURI(resourcePath.toString(), false);
 		}
 		else {
 			resourceUri = getModuleURI(URI.createURI(resourcePath.toString()));
 		}

 		URIConverter uriConverter = getResourceSet().getURIConverter();
 		return uriConverter.normalize(resourceUri);
 	}

 	/**
 	 * Return the resource, if it exists.  If no file exists for this resource,
 	 * this will return a stub resource.  You must call #createResource() to
 	 * create the file on the file system.
 	 */
 	public JpaXmlResource getXmlResource() {
 		if (this.resource == null) {
 			JpaXmlResource newResource = (JpaXmlResource) WorkbenchResourceHelper.getOrCreateResource(this.fileUri, getResourceSet());
 			//EMF caches resources based on URI.  If the resource has changed content types (say the schema was changed
 			//from orm to eclipselink-orm), then the resource will be of the wrong type and we need to create a new one.
 			if (newResource.getContentType().equals(this.contentType)) {
 				this.resource = newResource;
 			}
 			else {
 				this.createResourceAndLoad();
 			}
 		}
 		return this.resource;
 	}

 	protected JpaXmlResource createResourceAndLoad() {
 		this.resource = createResource();
 		this.loadResource();
 		return this.resource;
 	}

 	protected JpaXmlResource createResource() {
 		Resource.Factory resourceFactory =
 			WTPResourceFactoryRegistry.INSTANCE.getFactory(this.fileUri, this.contentType.getDefaultDescription());
 		return (JpaXmlResource) ((FlexibleProjectResourceSet) getResourceSet()).createResource(this.fileUri, resourceFactory);
 	}

 	protected void loadResource() {
 		try {
 			this.resource.load(((FlexibleProjectResourceSet) getResourceSet()).getLoadOptions());
 		}
 		catch (IOException e) {
 			JptCorePlugin.log(e);
 		}
 	}

 	protected void createResourceAndUnderlyingFile(Object config) {
 		this.resource = createResource();
 		if (this.resource.fileExists()) { //always possible that the file already exists when the jpa facet is added
 			loadResource();
 		}
 		else {
 			populateRoot(config);
 			try {
 				this.resource.saveIfNecessary(); //this writes out the file
 			}
 			catch (Exception e) {
 				JptCorePlugin.log(e);
 			}
 		}
 	}

 	/**
 	 * This will actually create the underlying file and the JpaXmlResource that corresponds to it.
 	 * It also populates the root of the file.
 	 * @param config - A configuration object used to specify options for creation of the resource
 	 */
 	public JpaXmlResource createFileAndResource(final Object config) throws CoreException {
 		IWorkspace workspace = ResourcesPlugin.getWorkspace();
 		IWorkspaceRunnable runnable = new IWorkspaceRunnable() {
 			public void run(IProgressMonitor monitor) {
 				createResourceAndUnderlyingFile(config);
 			}
 		};
 		workspace.run(runnable, this.project, IWorkspace.AVOID_UPDATE, null);
 		return this.resource;
 	}

 	protected URI getModuleURI(URI uri) {
 		URI moduleuri = ModuleURIUtil.fullyQualifyURI(this.project);
 		IPath requestPath = new Path(moduleuri.path()).append(new Path(uri.path()));
 		URI resourceURI = URI.createURI(PlatformURLModuleConnection.MODULE_PROTOCOL + requestPath.toString());
 		return resourceURI;
 	}

 	/**
 	 * Used to optionally fill in the root information of a resource if it does not
 	 * exist as a file
 	 */
 	protected void populateRoot(Object config) {
 		//TODO potentially call resource.populateRoot() instead of the resourceProvider doing this
 	}


 	/**
 	 * minimize the scope of the suppressed warnings
 	 */
 	protected EList<EObject> getResourceContents() {
 		return this.resource.getContents();
 	}

 	public void addListener(JpaXmlResourceProviderListener listener) {
 		if (this.listenerList.isEmpty()) {
 			engageResource();
 		}
 		this.listenerList.add(listener);
 	}

 	public void removeListener(JpaXmlResourceProviderListener listener) {
 		this.listenerList.remove(listener);
 		if (this.listenerList.isEmpty()) {
 			disengageResource();
 		}
 	}

 	private void engageResource() {
 		if (this.resource != null) {
 			this.resource.eAdapters().add(this.resourceAdapter);
 		}
  	}

 	private void disengageResource() {
 		if (this.resource != null) {
 			this.resource.eAdapters().remove(this.resourceAdapter);
 		}
 	}

 	protected ProjectResourceSet getResourceSet() {
 		return (ProjectResourceSet) WorkbenchResourceHelperBase.getResourceSet(project);
 	}

 	public IProject getProject() {
 		return this.project;
 	}

 	protected void resourceIsLoadedChanged(Resource aResource, boolean oldValue, boolean newValue) {
 		if ( ! this.listenerList.isEmpty()) {
 			int eventType= newValue ? JpaXmlResourceProviderEvent.RESOURCE_LOADED : JpaXmlResourceProviderEvent.RESOURCE_UNLOADED;
 			JpaXmlResourceProviderEvent evt = new JpaXmlResourceProviderEvent(this, eventType);
 			notifyListeners(evt);
 		}
 	}

 	protected void notifyListeners(JpaXmlResourceProviderEvent event) {
 		NotifyRunner notifier = new NotifyRunner(event);
 		for (JpaXmlResourceProviderListener listener : this.listenerList.getListeners()) {
 			notifier.setListener(listener);
 			SafeRunner.run(notifier);
 		}
 	}

 	public IStatus validateEdit(Object context) {
 		IWorkspace work = ResourcesPlugin.getWorkspace();
 		IFile file = WorkbenchResourceHelper.getFile(this.resource);
 		if (file != null) {
 			IFile[] files = { file };
 			if (context == null) {
 				context = IWorkspace.VALIDATE_PROMPT;
 			}
 			return work.validateEdit(files, context);
 		}
 		return Status.OK_STATUS;
 	}

 	// **************** ResourceStateValidator impl ****************************

 	public ResourceStateValidator getStateValidator() {
 		if (this.stateValidator == null) {
 			this.stateValidator = createStateValidator();
 		}
 		return this.stateValidator;
 	}

 	private ResourceStateValidator createStateValidator() {
 		return new ResourceStateValidatorImpl(this);
 	}

 	public void checkActivation(ResourceStateValidatorPresenter presenter) throws CoreException {
 		getStateValidator().checkActivation(presenter);
 	}

 	public void lostActivation(ResourceStateValidatorPresenter presenter) throws CoreException {
 		getStateValidator().lostActivation(presenter);
 	}

 	public IStatus validateState(ResourceStateValidatorPresenter presenter) throws CoreException {
 		if (presenter == null) {
 			return Status.OK_STATUS;
 		}
 		return getStateValidator().validateState(presenter);
 	}

 	public boolean checkSave(ResourceStateValidatorPresenter presenter) throws CoreException {
 		return getStateValidator().checkSave(presenter);
 	}

 	public boolean checkReadOnly() {
 		return getStateValidator().checkReadOnly();
 	}


 	// **************** ResourceStateInputProvider impl ************************

 	public boolean isDirty() {
 		return this.resource.isModified();
 	}

 	@SuppressWarnings("unchecked")
 	public List getNonResourceFiles() {
 		return Collections.emptyList();
 	}

 	@SuppressWarnings("unchecked")
 	public List getNonResourceInconsistentFiles() {
 		return Collections.emptyList();
 	}

 	@SuppressWarnings("unchecked")
 	public List getResources() {
 		return Collections.singletonList(getXmlResource());
 	}

 	@SuppressWarnings("unchecked")
 	public void cacheNonResourceValidateState(List roNonResourceFiles) {
 		// do nothing
 	}


 	// **************** member classes *****************************************

 	protected class ResourceAdapter extends AdapterImpl {
 		@Override
 		public void notifyChanged(Notification notification) {
 			if ( notification.getEventType() == Notification.SET && notification.getFeatureID(null) == Resource.RESOURCE__IS_LOADED) {
 				resourceIsLoadedChanged((Resource) notification.getNotifier(), notification.getOldBooleanValue(), notification.getNewBooleanValue());
 			}
 		}
 	}


 	public static class NotifyRunner implements ISafeRunnable
 	{
 		private final JpaXmlResourceProviderEvent event;

 		private JpaXmlResourceProviderListener listener;


 		public NotifyRunner(JpaXmlResourceProviderEvent event) {
 			Assert.isNotNull(event);
 			this.event = event;
 		}


 		public void setListener(JpaXmlResourceProviderListener listener) {
 			this.listener = listener;
 		}

 		public void run() throws Exception {
 			if (listener != null) {
 				listener.modelChanged(event);
 			}
 		}

 		public void handleException(Throwable exception) {
 			JptCorePlugin.log(exception);
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2008, 2009 Oracle. 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:
	* Oracle - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jpt.core.resource;

	import java.io.IOException;
	import java.util.Collections;
	import java.util.List;
	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.resources.IWorkspace;
	import org.eclipse.core.resources.IWorkspaceRunnable;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.Assert;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.IProgressMonitor;
	import org.eclipse.core.runtime.ISafeRunnable;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Path;
	import org.eclipse.core.runtime.SafeRunner;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.core.runtime.content.IContentType;
	import org.eclipse.emf.common.notify.Notification;
	import org.eclipse.emf.common.notify.impl.AdapterImpl;
	import org.eclipse.emf.common.util.EList;
	import org.eclipse.emf.common.util.URI;
	import org.eclipse.emf.ecore.EObject;
	import org.eclipse.emf.ecore.resource.Resource;
	import org.eclipse.emf.ecore.resource.URIConverter;
	import org.eclipse.jem.util.emf.workbench.FlexibleProjectResourceSet;
	import org.eclipse.jem.util.emf.workbench.ProjectResourceSet;
	import org.eclipse.jem.util.emf.workbench.WorkbenchResourceHelperBase;
	import org.eclipse.jpt.core.JptCorePlugin;
	import org.eclipse.jpt.core.resource.xml.JpaXmlResource;
	import org.eclipse.jpt.utility.internal.ListenerList;
	import org.eclipse.wst.common.componentcore.internal.impl.ModuleURIUtil;
	import org.eclipse.wst.common.componentcore.internal.impl.PlatformURLModuleConnection;
	import org.eclipse.wst.common.componentcore.internal.impl.WTPResourceFactoryRegistry;
	import org.eclipse.wst.common.internal.emfworkbench.WorkbenchResourceHelper;
	import org.eclipse.wst.common.internal.emfworkbench.validateedit.ResourceStateInputProvider;
	import org.eclipse.wst.common.internal.emfworkbench.validateedit.ResourceStateValidator;
	import org.eclipse.wst.common.internal.emfworkbench.validateedit.ResourceStateValidatorImpl;
	import org.eclipse.wst.common.internal.emfworkbench.validateedit.ResourceStateValidatorPresenter;

	/**
	* Provisional API: This interface is part of an interim API that is still
	* under development and expected to change significantly before reaching
	* stability. It is available at this early stage to solicit feedback from
	* pioneering adopters on the understanding that any code that uses this API
	* will almost certainly be broken (repeatedly) as the API evolves.
	*/
	public abstract class AbstractXmlResourceProvider
	implements JpaXmlResourceProvider, ResourceStateInputProvider, ResourceStateValidator
	{
	protected IProject project;

	protected URI fileUri;

	protected JpaXmlResource resource;

	protected IContentType contentType;

	protected final ResourceAdapter resourceAdapter = new ResourceAdapter();

	protected final ListenerList<JpaXmlResourceProviderListener> listenerList = new ListenerList<JpaXmlResourceProviderListener>(JpaXmlResourceProviderListener.class);

	protected ResourceStateValidator stateValidator;


	/**
	* Create a new AbstractResourceModelProvider for the given project and
	* resourcePath. The resourcePath may be either a) an absolute platform
	* resource path (e.g. "MyProject/src/META-INF/foobar.xml") or b) a relative
	* deploy path (e.g. "META-INF/foobar.xml".) In either case,
	* {@link #buildFileUri(IPath)} will attempt to build an absolutely pathed
	* URI for the given path.
	*/
	public AbstractXmlResourceProvider(IProject project, IPath resourcePath, IContentType contentType) {
	super();
	this.project = project;
	this.fileUri = buildFileUri(resourcePath);
	this.contentType = contentType;
	}

	protected URI buildFileUri(IPath resourcePath) {
	URI resourceUri = null;

	if (resourcePath.isAbsolute()) {
	resourceUri = URI.createPlatformResourceURI(resourcePath.toString(), false);
	}
	else {
	resourceUri = getModuleURI(URI.createURI(resourcePath.toString()));
	}

	URIConverter uriConverter = getResourceSet().getURIConverter();
	return uriConverter.normalize(resourceUri);
	}

	/**
	* Return the resource, if it exists. If no file exists for this resource,
	* this will return a stub resource. You must call #createResource() to
	* create the file on the file system.
	*/
	public JpaXmlResource getXmlResource() {
	if (this.resource == null) {
	JpaXmlResource newResource = (JpaXmlResource) WorkbenchResourceHelper.getOrCreateResource(this.fileUri, getResourceSet());
	//EMF caches resources based on URI. If the resource has changed content types (say the schema was changed
	//from orm to eclipselink-orm), then the resource will be of the wrong type and we need to create a new one.
	if (newResource.getContentType().equals(this.contentType)) {
	this.resource = newResource;
	}
	else {
	this.createResourceAndLoad();
	}
	}
	return this.resource;
	}

	protected JpaXmlResource createResourceAndLoad() {
	this.resource = createResource();
	this.loadResource();
	return this.resource;
	}

	protected JpaXmlResource createResource() {
	Resource.Factory resourceFactory =
	WTPResourceFactoryRegistry.INSTANCE.getFactory(this.fileUri, this.contentType.getDefaultDescription());
	return (JpaXmlResource) ((FlexibleProjectResourceSet) getResourceSet()).createResource(this.fileUri, resourceFactory);
	}

	protected void loadResource() {
	try {
	this.resource.load(((FlexibleProjectResourceSet) getResourceSet()).getLoadOptions());
	}
	catch (IOException e) {
	JptCorePlugin.log(e);
	}
	}

	protected void createResourceAndUnderlyingFile(Object config) {
	this.resource = createResource();
	if (this.resource.fileExists()) { //always possible that the file already exists when the jpa facet is added
	loadResource();
	}
	else {
	populateRoot(config);
	try {
	this.resource.saveIfNecessary(); //this writes out the file
	}
	catch (Exception e) {
	JptCorePlugin.log(e);
	}
	}
	}

	/**
	* This will actually create the underlying file and the JpaXmlResource that corresponds to it.
	* It also populates the root of the file.
	* @param config - A configuration object used to specify options for creation of the resource
	*/
	public JpaXmlResource createFileAndResource(final Object config) throws CoreException {
	IWorkspace workspace = ResourcesPlugin.getWorkspace();
	IWorkspaceRunnable runnable = new IWorkspaceRunnable() {
	public void run(IProgressMonitor monitor) {
	createResourceAndUnderlyingFile(config);
	}
	};
	workspace.run(runnable, this.project, IWorkspace.AVOID_UPDATE, null);
	return this.resource;
	}

	protected URI getModuleURI(URI uri) {
	URI moduleuri = ModuleURIUtil.fullyQualifyURI(this.project);
	IPath requestPath = new Path(moduleuri.path()).append(new Path(uri.path()));
	URI resourceURI = URI.createURI(PlatformURLModuleConnection.MODULE_PROTOCOL + requestPath.toString());
	return resourceURI;
	}

	/**
	* Used to optionally fill in the root information of a resource if it does not
	* exist as a file
	*/
	protected void populateRoot(Object config) {
	//TODO potentially call resource.populateRoot() instead of the resourceProvider doing this
	}


	/**
	* minimize the scope of the suppressed warnings
	*/
	protected EList<EObject> getResourceContents() {
	return this.resource.getContents();
	}

	public void addListener(JpaXmlResourceProviderListener listener) {
	if (this.listenerList.isEmpty()) {
	engageResource();
	}
	this.listenerList.add(listener);
	}

	public void removeListener(JpaXmlResourceProviderListener listener) {
	this.listenerList.remove(listener);
	if (this.listenerList.isEmpty()) {
	disengageResource();
	}
	}

	private void engageResource() {
	if (this.resource != null) {
	this.resource.eAdapters().add(this.resourceAdapter);
	}
	}

	private void disengageResource() {
	if (this.resource != null) {
	this.resource.eAdapters().remove(this.resourceAdapter);
	}
	}

	protected ProjectResourceSet getResourceSet() {
	return (ProjectResourceSet) WorkbenchResourceHelperBase.getResourceSet(project);
	}

	public IProject getProject() {
	return this.project;
	}

	protected void resourceIsLoadedChanged(Resource aResource, boolean oldValue, boolean newValue) {
	if ( ! this.listenerList.isEmpty()) {
	int eventType= newValue ? JpaXmlResourceProviderEvent.RESOURCE_LOADED : JpaXmlResourceProviderEvent.RESOURCE_UNLOADED;
	JpaXmlResourceProviderEvent evt = new JpaXmlResourceProviderEvent(this, eventType);
	notifyListeners(evt);
	}
	}

	protected void notifyListeners(JpaXmlResourceProviderEvent event) {
	NotifyRunner notifier = new NotifyRunner(event);
	for (JpaXmlResourceProviderListener listener : this.listenerList.getListeners()) {
	notifier.setListener(listener);
	SafeRunner.run(notifier);
	}
	}

	public IStatus validateEdit(Object context) {
	IWorkspace work = ResourcesPlugin.getWorkspace();
	IFile file = WorkbenchResourceHelper.getFile(this.resource);
	if (file != null) {
	IFile[] files = { file };
	if (context == null) {
	context = IWorkspace.VALIDATE_PROMPT;
	}
	return work.validateEdit(files, context);
	}
	return Status.OK_STATUS;
	}

	// ************** ResourceStateValidator impl **************************

	public ResourceStateValidator getStateValidator() {
	if (this.stateValidator == null) {
	this.stateValidator = createStateValidator();
	}
	return this.stateValidator;
	}

	private ResourceStateValidator createStateValidator() {
	return new ResourceStateValidatorImpl(this);
	}

	public void checkActivation(ResourceStateValidatorPresenter presenter) throws CoreException {
	getStateValidator().checkActivation(presenter);
	}

	public void lostActivation(ResourceStateValidatorPresenter presenter) throws CoreException {
	getStateValidator().lostActivation(presenter);
	}

	public IStatus validateState(ResourceStateValidatorPresenter presenter) throws CoreException {
	if (presenter == null) {
	return Status.OK_STATUS;
	}
	return getStateValidator().validateState(presenter);
	}

	public boolean checkSave(ResourceStateValidatorPresenter presenter) throws CoreException {
	return getStateValidator().checkSave(presenter);
	}

	public boolean checkReadOnly() {
	return getStateValidator().checkReadOnly();
	}


	// ************** ResourceStateInputProvider impl **********************

	public boolean isDirty() {
	return this.resource.isModified();
	}

	@SuppressWarnings("unchecked")
	public List getNonResourceFiles() {
	return Collections.emptyList();
	}

	@SuppressWarnings("unchecked")
	public List getNonResourceInconsistentFiles() {
	return Collections.emptyList();
	}

	@SuppressWarnings("unchecked")
	public List getResources() {
	return Collections.singletonList(getXmlResource());
	}

	@SuppressWarnings("unchecked")
	public void cacheNonResourceValidateState(List roNonResourceFiles) {
	// do nothing
	}


	// ************** member classes ***************************************

	protected class ResourceAdapter extends AdapterImpl {
	@Override
	public void notifyChanged(Notification notification) {
	if ( notification.getEventType() == Notification.SET && notification.getFeatureID(null) == Resource.RESOURCE__IS_LOADED) {
	resourceIsLoadedChanged((Resource) notification.getNotifier(), notification.getOldBooleanValue(), notification.getNewBooleanValue());
	}
	}
	}


	public static class NotifyRunner implements ISafeRunnable
	{
	private final JpaXmlResourceProviderEvent event;

	private JpaXmlResourceProviderListener listener;


	public NotifyRunner(JpaXmlResourceProviderEvent event) {
	Assert.isNotNull(event);
	this.event = event;
	}


	public void setListener(JpaXmlResourceProviderListener listener) {
	this.listener = listener;
	}

	public void run() throws Exception {
	if (listener != null) {
	listener.modelChanged(event);
	}
	}

	public void handleException(Throwable exception) {
	JptCorePlugin.log(exception);
	}
	}
	}