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package org.eclipse.papyrus.infra.gmfdiag.xtext.glue.concurrency;
import java.util.List;
import java.util.Map;
import org.apache.log4j.Logger;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.common.notify.Notifier;
import org.eclipse.emf.common.notify.impl.AdapterFactoryImpl;
import org.eclipse.emf.common.notify.impl.AdapterImpl;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.transaction.NotificationFilter;
import org.eclipse.emf.transaction.ResourceSetChangeEvent;
import org.eclipse.emf.transaction.ResourceSetListener;
import org.eclipse.emf.transaction.RollbackException;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.emf.transaction.TransactionalEditingDomain.Lifecycle;
import org.eclipse.emf.transaction.TransactionalEditingDomainEvent;
import org.eclipse.emf.transaction.TransactionalEditingDomainListener;
import org.eclipse.emf.transaction.util.TransactionUtil;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.papyrus.infra.gmfdiag.xtext.glue.Activator;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.xtext.resource.IResourceServiceProvider;
import org.eclipse.xtext.resource.XtextResource;
import org.eclipse.xtext.ui.editor.IDirtyResource;
import org.eclipse.xtext.ui.editor.IDirtyStateManager;
import org.eclipse.xtext.ui.shared.Access;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
/**
* This element comes from the XText/GMF integration example, and was not originally documented.
*/
public class EditingDomainAdapter extends AdapterImpl implements ResourceSetListener,
TransactionalEditingDomainListener {
/**
* This element comes from the XText/GMF integration example, and was not originally documented.
*/
public static class Factory extends AdapterFactoryImpl {
@Override
public boolean isFactoryForType(Object type) {
return super.isFactoryForType(type == EditingDomainAdapter.class);
}
@Override
protected Object resolve(Object object, Object type) {
if (object instanceof TransactionalEditingDomain) {
return adapt(((TransactionalEditingDomain) object).getResourceSet(), type);
}
return super.resolve(object, type);
}
@Override
protected Adapter createAdapter(Notifier target) {
if (target instanceof ResourceSet) {
return new EditingDomainAdapter(TransactionUtil.getEditingDomain(target));
} else {
return null;
}
}
}
private final TransactionalEditingDomain editingDomain;
private IDirtyStateManager dirtyStateManager;
private Map<URI, IDirtyResource> uri2dirtyResource;
private static final Logger LOG = Logger.getLogger(EditingDomainAdapter.class);
protected EditingDomainAdapter(TransactionalEditingDomain editingDomain) {
this.editingDomain = editingDomain;
editingDomain.addResourceSetListener(this);
dirtyStateManager = Access.getIDirtyStateManager().get();
uri2dirtyResource = Maps.newHashMap();
Lifecycle lifecycle = TransactionUtil.getAdapter(editingDomain, Lifecycle.class);
lifecycle.addTransactionalEditingDomainListener(this);
}
public NotificationFilter getFilter() {
return null;
}
public boolean isAggregatePrecommitListener() {
return true;
}
public boolean isPostcommitOnly() {
return false;
}
public boolean isPrecommitOnly() {
return false;
}
public void resourceSetChanged(ResourceSetChangeEvent event) {
List<URI> remainingURIs = Lists.newArrayList(uri2dirtyResource.keySet());
for (Resource resource : editingDomain.getResourceSet().getResources()) {
if (resource instanceof XtextResource) {
XtextResource xtextResource = (XtextResource) resource;
remainingURIs.remove(xtextResource.getURI());
IDirtyResource dirtyResource = uri2dirtyResource.get(xtextResource.getURI());
if (xtextResource.isModified()) {
if (dirtyResource == null) {
createAndRegisterDirtyState(xtextResource);
}
} else {
if (dirtyResource != null) {
uri2dirtyResource.remove(xtextResource.getURI());
dirtyStateManager.discardDirtyState(dirtyResource);
}
}
}
}
// removed resources
for (URI remainingURI : remainingURIs) {
IDirtyResource dirtyResource = uri2dirtyResource.get(remainingURI);
dirtyStateManager.discardDirtyState(dirtyResource);
uri2dirtyResource.remove(remainingURI);
}
}
public Command transactionAboutToCommit(ResourceSetChangeEvent event) throws RollbackException {
List<XtextResource> resourcesWithConflicts = null;
for (Resource resource : editingDomain.getResourceSet().getResources()) {
if (resource instanceof XtextResource && resource.isModified()) {
XtextResource xtextResource = (XtextResource) resource;
IDirtyResource dirtyResource = uri2dirtyResource.get(xtextResource.getURI());
if (dirtyResource == null) {
if (!createAndRegisterDirtyState(xtextResource)) {
if (resourcesWithConflicts == null) {
resourcesWithConflicts = Lists.newArrayList();
}
resourcesWithConflicts.add(xtextResource);
}
}
}
}
if (resourcesWithConflicts != null) {
if (queryApplyChanges()) {
for (XtextResource resourceWithConflicts : resourcesWithConflicts) {
try {
IDirtyResource dirtyResource = createDirtyResource(resourceWithConflicts);
// assert resource is serializable
dirtyResource.getContents();
dirtyStateManager.announceDirtyStateChanged(dirtyResource);
} catch (Exception exc) {
LOG.error("Error serializing resource", exc);
}
}
} else {
throw new RollbackException(new Status(IStatus.ERROR, Activator.PLUGIN_ID,
"Transaction aborted by user"));
}
}
return null;
}
protected boolean createAndRegisterDirtyState(XtextResource xtextResource) {
IDirtyResource dirtyResource = createDirtyResource(xtextResource);
if (dirtyResource == null) {
return true;
} else {
boolean isSuccess = dirtyStateManager.manageDirtyState(dirtyResource);
if (isSuccess) {
uri2dirtyResource.put(xtextResource.getURI(), dirtyResource);
}
return isSuccess;
}
}
protected IDirtyResource createDirtyResource(XtextResource xtextResource) {
IResourceServiceProvider resourceServiceProvider = IResourceServiceProvider.Registry.INSTANCE
.getResourceServiceProvider(xtextResource.getURI());
if (resourceServiceProvider == null) {
return null;
}
return new SimpleDirtyResource(xtextResource, resourceServiceProvider);
}
public void editingDomainDisposing(TransactionalEditingDomainEvent event) {
dispose();
}
/**
* This element comes from the XText/GMF integration example, and was not originally documented.
*/
public void dispose() {
if (uri2dirtyResource != null) {
for (IDirtyResource dirtyResource : uri2dirtyResource.values()) {
dirtyStateManager.discardDirtyState(dirtyResource);
}
uri2dirtyResource = null;
}
Lifecycle lifecycle = TransactionUtil.getAdapter(editingDomain, Lifecycle.class);
if (lifecycle != null) {
lifecycle.removeTransactionalEditingDomainListener(this);
}
editingDomain.removeResourceSetListener(this);
}
protected boolean queryApplyChanges() {
DialogPrompter dialogPrompter = new DialogPrompter();
Display.getDefault().syncExec(dialogPrompter);
boolean yesResult = dialogPrompter.isYesResult();
return yesResult;
}
protected class DialogPrompter implements Runnable {
private boolean isYesResult;
public boolean isYesResult() {
return isYesResult;
}
public void run() {
Shell shell = Display.getDefault().getActiveShell();
isYesResult = MessageDialog.open(MessageDialog.QUESTION, shell, "Concurrent Modification",
"Other editors have a modified version of models you are going to change.\n"
+ "If apply your changes you are loosing the possibility to save the others.\n"
+ "Apply changes anyway?", SWT.NONE);
}
}
public void transactionClosed(TransactionalEditingDomainEvent event) {
// do nothing
}
public void transactionClosing(TransactionalEditingDomainEvent event) {
// do nothing
}
public void transactionInterrupted(TransactionalEditingDomainEvent event) {
// do nothing
}
public void transactionStarted(TransactionalEditingDomainEvent event) {
// do nothing
}
public void transactionStarting(TransactionalEditingDomainEvent event) {
// do nothing
}
}
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