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/*******************************************************************************
* Copyright (c) 2008 Oracle Corporation.
* 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:
* Cameron Bateman - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.jsf.facelet.core.internal.registry.taglib;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.ISafeRunnable;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.SafeRunner;
import org.eclipse.jem.internal.proxy.core.IConfigurationContributor;
import org.eclipse.jem.internal.proxy.core.ProxyFactoryRegistry;
import org.eclipse.jem.internal.proxy.ide.IDERegistration;
import org.eclipse.jst.jsf.core.JSFVersion;
import org.eclipse.jst.jsf.facelet.core.internal.FaceletCorePlugin;
import org.eclipse.jst.jsf.facelet.core.internal.registry.ELProxyContributor;
import org.eclipse.jst.jsf.facelet.core.internal.registry.ServletBeanProxyContributor;
class ProjectTaglibDescriptor implements IProjectTaglibDescriptor
{
private ProxyFactoryRegistry _registry;
private final AtomicInteger _isInitialized = new AtomicInteger(
0);
private final IProject _project;
private final List<AbstractFaceletTaglibLocator> _locators;
private final MyChangeListener _libChangeListener;
private final Map<String, IFaceletTagRecord> _tagRecords;
public ProjectTaglibDescriptor(final IProject project)
{
_project = project;
_locators = new ArrayList<AbstractFaceletTaglibLocator>();
_tagRecords = new HashMap<String, IFaceletTagRecord>();
try
{
_registry = createProxyRegistry(_project);
}
catch (final CoreException e)
{
FaceletCorePlugin.log("While creatinng proxy", e); //$NON-NLS-1$
}
final TagRecordFactory factory = new TagRecordFactory(project,
_registry);
_locators.add(new JarFileFaceletTaglibLocator(factory));
_locators.add(new ContextParamSpecifiedFaceletTaglibLocator(_project,
factory));
_libChangeListener = new MyChangeListener();
}
private static ProxyFactoryRegistry createProxyRegistry(
final IProject project) throws CoreException
{
final IConfigurationContributor[] contributor = new IConfigurationContributor[]
{ new ServletBeanProxyContributor(JSFVersion.V1_1),
new ELProxyContributor(project) };
return IDERegistration.startAnImplementation(contributor, false,
project, project.getName(), FaceletCorePlugin.PLUGIN_ID,
new NullProgressMonitor());
}
private void initialize()
{
if (_isInitialized.addAndGet(1) == 1)
{
synchronized (this)
{
for (final AbstractFaceletTaglibLocator locator : _locators)
{
SafeRunner.run(new ISafeRunnable()
{
public void handleException(final Throwable exception)
{
FaceletCorePlugin
.log(
"While locating facelet libraries on project: " + _project.getName(), new Exception(exception)); //$NON-NLS-1$
}
public void run() throws Exception
{
locator.addListener(_libChangeListener);
locator.start(_project);
_tagRecords.putAll(locator.locate(_project));
}
});
}
}
}
}
public Collection<? extends IFaceletTagRecord> getTagLibraries()
{
initialize();
return Collections.unmodifiableCollection(_tagRecords.values());
}
void maybeLog(final Exception e)
{
if (_isInitialized.get() <= 1)
{
FaceletCorePlugin.log("Failed initializing taglib descriptor", e); //$NON-NLS-1$
}
}
public IFaceletTagRecord getTagLibrary(final String uri)
{
initialize();
return _tagRecords.get(uri);
}
public void addListener(final Listener listener)
{
for (final AbstractFaceletTaglibLocator locator : _locators)
{
locator.addListener(listener);
}
}
public void removeListener(final Listener listener)
{
for (final AbstractFaceletTaglibLocator locator : _locators)
{
locator.removeListener(listener);
}
}
public void checkpoint()
{
// TODO Auto-generated method stub
}
public void destroy()
{
// TODO Auto-generated method stub
}
public void dispose()
{
if (_registry != null)
{
_registry.terminateRegistry(false);
for (final AbstractFaceletTaglibLocator locator : _locators)
{
locator.stop();
}
}
}
private class MyChangeListener extends Listener
{
@Override
public void changed(final TaglibChangedEvent event)
{
switch (event.getChangeType())
{
case ADDED:
_tagRecords.put(event.getNewValue().getURI(), event
.getNewValue());
break;
case CHANGED:
_tagRecords.put(event.getNewValue().getURI(), event
.getNewValue());
break;
case REMOVED:
_tagRecords.remove(event.getOldValue());
break;
}
}
}
}
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