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/*******************************************************************************
* Copyright (c) 2000, 2006 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.team.internal.ui.registry;
import java.util.*;
import org.eclipse.core.runtime.*;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.team.core.mapping.ISynchronizationScope;
import org.eclipse.team.internal.ui.TeamUIPlugin;
import org.eclipse.team.ui.mapping.ITeamContentProviderDescriptor;
import org.eclipse.team.ui.mapping.ITeamContentProviderManager;
/**
* Manages the team content provider extension point
*/
public class TeamContentProviderManager implements ITeamContentProviderManager {
public static final String PT_TEAM_CONTENT_PROVIDERS = "teamContentProviders"; //$NON-NLS-1$
private static ITeamContentProviderManager instance;
Map descriptors;
private ListenerList listeners = new ListenerList(ListenerList.IDENTITY);
public static ITeamContentProviderManager getInstance() {
if (instance == null)
instance = new TeamContentProviderManager();
return instance;
}
/* (non-Javadoc)
* @see org.eclipse.team.internal.ui.registry.ITeamContentProviderManager#getDescriptors()
*/
@Override
public ITeamContentProviderDescriptor[] getDescriptors() {
lazyInitialize();
return (ITeamContentProviderDescriptor[]) descriptors.values().toArray(new ITeamContentProviderDescriptor[descriptors.size()]);
}
/* (non-Javadoc)
* @see org.eclipse.team.ui.mapping.ITeamContentProviderManager#getContentProviderIds(org.eclipse.team.core.mapping.ISynchronizationScope)
*/
@Override
public String[] getContentProviderIds(ISynchronizationScope scope) {
List result = new ArrayList();
ITeamContentProviderDescriptor[] descriptors = getDescriptors();
for (int i = 0; i < descriptors.length; i++) {
ITeamContentProviderDescriptor descriptor = descriptors[i];
if (descriptor.isEnabled() && scope.getMappings(descriptor.getModelProviderId()).length > 0)
result.add(descriptor.getContentExtensionId());
}
return (String[]) result.toArray(new String[result.size()]);
}
/* (non-Javadoc)
* @see org.eclipse.team.internal.ui.registry.ITeamContentProviderManager#getDescriptor(java.lang.String)
*/
@Override
public ITeamContentProviderDescriptor getDescriptor(String modelProviderId) {
lazyInitialize();
return (ITeamContentProviderDescriptor)descriptors.get(modelProviderId);
}
protected void lazyInitialize() {
if (descriptors != null)
return;
IExtensionPoint point = Platform.getExtensionRegistry().getExtensionPoint(TeamUIPlugin.ID, PT_TEAM_CONTENT_PROVIDERS);
IExtension[] extensions = point.getExtensions();
descriptors = new HashMap(extensions.length * 2);
for (int i = 0, imax = extensions.length; i < imax; i++) {
ITeamContentProviderDescriptor desc = null;
try {
desc = new TeamContentProviderDescriptor(extensions[i]);
} catch (CoreException e) {
TeamUIPlugin.log(e);
}
if (desc != null)
descriptors.put(desc.getModelProviderId(), desc);
}
}
@Override
public void addPropertyChangeListener(IPropertyChangeListener listener) {
listeners.add(listener);
}
@Override
public void removePropertyChangeListener(IPropertyChangeListener listener) {
listeners.remove(listener);
}
private void firePropertyChange(final PropertyChangeEvent event) {
Object[] allListeners = listeners.getListeners();
for (int i = 0; i < allListeners.length; i++) {
final IPropertyChangeListener listener = (IPropertyChangeListener)allListeners[i];
SafeRunner.run(new ISafeRunnable() {
@Override
public void run() throws Exception {
listener.propertyChange(event);
}
@Override
public void handleException(Throwable exception) {
// handler by runner
}
});
}
}
public void enablementChanged(ITeamContentProviderDescriptor[] oldEnabled, ITeamContentProviderDescriptor[] newEnabled) {
firePropertyChange(new PropertyChangeEvent(this, PROP_ENABLED_MODEL_PROVIDERS, oldEnabled, newEnabled));
}
@Override
public void setEnabledDescriptors(ITeamContentProviderDescriptor[] descriptors) {
List previouslyEnabled = new ArrayList();
for (Iterator iter = this.descriptors.values().iterator(); iter.hasNext();) {
TeamContentProviderDescriptor descriptor = (TeamContentProviderDescriptor) iter.next();
if (descriptor.isEnabled()) {
previouslyEnabled.add(descriptor);
descriptor.setEnabled(false);
}
}
for (int i = 0; i < descriptors.length; i++) {
TeamContentProviderDescriptor descriptor = (TeamContentProviderDescriptor)descriptors[i];
descriptor.setEnabled(true);
}
enablementChanged(
(ITeamContentProviderDescriptor[]) previouslyEnabled.toArray(new ITeamContentProviderDescriptor[previouslyEnabled.size()]),
descriptors);
}
}
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