/*******************************************************************************
* Copyright (c) 2000, 2007 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
*
*******************************************************************************/
/*
* Created on Apr 13, 2004
*
* TODO To change the template for this generated file go to Window -
* Preferences - Script - Code Generation - Code and Comments
*/
package org.eclipse.dltk.internal.ui.search;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.dltk.ui.DLTKUIPlugin;
import org.eclipse.dltk.ui.search.ScriptSearchPage;
public class SearchParticipantsExtensionPoint {
private Set fActiveParticipants= null;
private static SearchParticipantsExtensionPoint fgInstance;
public boolean hasAnyParticipants() {
return Platform.getExtensionRegistry().getConfigurationElementsFor(ScriptSearchPage.PARTICIPANT_EXTENSION_POINT).length > 0;
}
private synchronized Set getAllParticipants() {
if (fActiveParticipants != null)
return fActiveParticipants;
IConfigurationElement[] allParticipants= Platform.getExtensionRegistry().getConfigurationElementsFor(ScriptSearchPage.PARTICIPANT_EXTENSION_POINT);
fActiveParticipants= new HashSet(allParticipants.length);
for (int i= 0; i < allParticipants.length; i++) {
SearchParticipantDescriptor descriptor= new SearchParticipantDescriptor(allParticipants[i]);
IStatus status= descriptor.checkSyntax();
if (status.isOK()) {
fActiveParticipants.add(descriptor);
} else {
DLTKUIPlugin.log(status);
}
}
return fActiveParticipants;
}
private void collectParticipants(Set participants, IProject[] projects) {
Iterator activeParticipants= getAllParticipants().iterator();
Set seenParticipants= new HashSet();
while (activeParticipants.hasNext()) {
SearchParticipantDescriptor participant= (SearchParticipantDescriptor) activeParticipants.next();
if (participant.isEnabled()) {
String id= participant.getID();
for (int i= 0; i < projects.length; i++) {
if (seenParticipants.contains(id))
continue;
try {
if (projects[i].hasNature(participant.getNature())) {
participants.add(new SearchParticipantRecord(participant, participant.create()));
seenParticipants.add(id);
}
} catch (CoreException e) {
DLTKUIPlugin.log(e.getStatus());
participant.disable();
}
}
}
}
}
public SearchParticipantRecord[] getSearchParticipants(IProject[] concernedProjects) throws CoreException {
Set participantSet= new HashSet();
collectParticipants(participantSet, concernedProjects);
SearchParticipantRecord[] participants= new SearchParticipantRecord[participantSet.size()];
return (SearchParticipantRecord[]) participantSet.toArray(participants);
}
public static synchronized SearchParticipantsExtensionPoint getInstance() {
if (fgInstance == null)
fgInstance= new SearchParticipantsExtensionPoint();
return fgInstance;
}
public static void debugSetInstance(SearchParticipantsExtensionPoint instance) {
fgInstance= instance;
}
}