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package org.eclipse.jst.jsf.facelet.core.internal.registry.taglib;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.eclipse.core.resources.IProject;
import org.eclipse.jst.jsf.common.internal.locator.ILocatorProvider;
import org.eclipse.jst.jsf.designtime.internal.resources.IJSFResource;
import org.eclipse.jst.jsf.designtime.internal.resources.IJSFResourceContainer;
import org.eclipse.jst.jsf.designtime.internal.resources.IJSFResourceFragment;
import org.eclipse.jst.jsf.designtime.internal.resources.IJSFResourceFragment.Type;
import org.eclipse.jst.jsf.designtime.internal.resources.IJSFResourceLocator;
import org.eclipse.jst.jsf.designtime.internal.resources.JSFResourceChangeListener;
import org.eclipse.jst.jsf.designtime.internal.resources.JSFResourceContainer;
import org.eclipse.jst.jsf.facelet.core.internal.registry.taglib.JSFResourceBasedTagRecord.Builder;
import org.eclipse.jst.jsf.facelet.core.internal.registry.taglib.Listener.TaglibChangedEvent;
import org.eclipse.jst.jsf.facelet.core.internal.registry.taglib.Listener.TaglibChangedEvent.CHANGE_TYPE;
/**
* A taglib locator that locates composite components, which a located as a type
* of JSF locatable resource.
*
* @author cbateman
*
*/
public class CompositeComponentTaglibLocator extends
AbstractFaceletTaglibLocator
{
private final class ResourceLocatorChangeListener extends
JSFResourceChangeListener
{
@Override
public void changed(final JSFResourceChangedEvent event)
{
final Builder builder = new Builder();
switch (event.getChangeType())
{
case ADDED:
case CHANGED:
{
handleAddAndChange(event, builder);
}
break;
case REMOVED:
{
handleRemove(event, builder);
}
break;
}
}
private void handleRemove(final JSFResourceChangedEvent event,
final Builder builder)
{
List<TaglibChangedEvent> events = Collections.EMPTY_LIST;
switch (event.getOldValue().getType())
{
case RESOURCE:
{
events = handleRemoveResource(event, builder);
}
break;
case CONTAINER:
{
events = handleRemoveContainer(event, builder);
}
break;
}
_records = builder.merge(events, _records);
for (final TaglibChangedEvent fireEvent : events)
{
fireChangeEvent(fireEvent);
}
}
private List<TaglibChangedEvent> handleRemoveContainer(
final JSFResourceChangedEvent event, final Builder builder)
{
final IJSFResourceFragment oldValue = event.getOldValue();
builder.addLibrary((IJSFResourceContainer) oldValue,
CHANGE_TYPE.REMOVED);
return builder.createRemove(CompositeComponentTaglibLocator.this,
_records);
}
private List<TaglibChangedEvent> handleRemoveResource(
final JSFResourceChangedEvent event, final Builder builder)
{
final IJSFResourceFragment oldValue = event.getOldValue();
builder.addTag((IJSFResource) oldValue, CHANGE_TYPE.REMOVED);
return builder.createRemove(CompositeComponentTaglibLocator.this,
_records);
}
private void handleAddAndChange(final JSFResourceChangedEvent event,
final Builder builder)
{
List<TaglibChangedEvent> events = Collections.EMPTY_LIST;
switch (event.getNewValue().getType())
{
case CONTAINER:
// if it's a fragment handle as a possible library add
events = handleFolderAddChange(event, builder);
break;
case RESOURCE:
// otherwise, handle as a file add.
events = handleFileAddChange(event, builder);
break;
}
_records = builder.merge(events, _records);
for (final TaglibChangedEvent fireEvent : events)
{
fireChangeEvent(fireEvent);
}
}
private List<TaglibChangedEvent> handleFolderAddChange(
final JSFResourceChangedEvent event, final Builder builder)
{
final JSFResourceContainer newValue = (JSFResourceContainer) event
.getNewValue();
builder.addLibrary(newValue, CHANGE_TYPE.ADDED);
return builder.createMerge(CompositeComponentTaglibLocator.this,
_records);
}
private List<TaglibChangedEvent> handleFileAddChange(
final JSFResourceChangedEvent event, final Builder builder)
{
final IJSFResource newValue = (IJSFResource) event.getNewValue();
builder.addTag(newValue, CHANGE_TYPE.ADDED);
return builder.createMerge(CompositeComponentTaglibLocator.this,
_records);
}
}
/**
* the id of the locator strategy.
*/
public static final String ID = CompositeComponentTaglibLocator.class
.getCanonicalName();
private static final String DISPLAY_NAME = "Composite Composite Tag Lib Locator"; //$NON-NLS-1$
private final ILocatorProvider<IJSFResourceLocator> _locatorProvider;
private Map<String, JSFResourceBasedTagRecord> _records;
private final ResourceLocatorChangeListener _listener;
/**
* @param locatorProvider
*/
public CompositeComponentTaglibLocator(
final ILocatorProvider<IJSFResourceLocator> locatorProvider)
{
super(ID, DISPLAY_NAME);
_locatorProvider = locatorProvider;
_locatorProvider.initialize();
_listener = new ResourceLocatorChangeListener();
}
@Override
public void start(final IProject initialContext)
{
for (final IJSFResourceLocator locator : _locatorProvider.getLocators())
{
locator.start(initialContext);
locator.addListener(_listener);
}
final Builder builder = new Builder();
for (final IJSFResourceLocator locator : _locatorProvider.getLocators())
{
final List<IJSFResourceFragment> resources = locator
.locate(initialContext);
for (final IJSFResourceFragment resource : resources)
{
if (resource.getType() == Type.RESOURCE)
{
builder.addTag((IJSFResource) resource, CHANGE_TYPE.ADDED);
}
}
}
_records = builder.build();
super.start(initialContext);
}
@Override
public void stop()
{
for (final IJSFResourceLocator locator : _locatorProvider.getLocators())
{
locator.stop();
}
super.stop();
}
@Override
protected Map<String, ? extends IFaceletTagRecord> doLocate(
final IProject context)
{
return Collections.unmodifiableMap(_records);
}
}
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