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/*
* Copyright 2000-2009 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intellij.ide.plugins;
import com.intellij.openapi.extensions.PluginId;
import com.intellij.util.containers.HashMap;
import gnu.trove.TObjectIntHashMap;
import java.util.Comparator;
import java.util.Map;
import java.util.Stack;
/**
* @author Eugene Zhuravlev
* Date: Aug 3, 2004
*/
public class PluginDescriptorComparator implements Comparator<IdeaPluginDescriptor>{
private final TObjectIntHashMap<PluginId> myIdToNumberMap = new TObjectIntHashMap<PluginId>();
private int myAvailableNumber = 1;
public PluginDescriptorComparator(IdeaPluginDescriptor[] descriptors){
final Map<PluginId, IdeaPluginDescriptor> idToDescriptorMap = new HashMap<PluginId, IdeaPluginDescriptor>();
for (final IdeaPluginDescriptor descriptor : descriptors) {
idToDescriptorMap.put(descriptor.getPluginId(), descriptor);
}
myIdToNumberMap.put(PluginId.getId(PluginManagerCore.CORE_PLUGIN_ID), 0);
final Stack<PluginId> visited = new Stack<PluginId>();
for (int idx = 0; idx < descriptors.length && myIdToNumberMap.size() != descriptors.length; idx++) {
assignNumbers(descriptors[idx].getPluginId(), idToDescriptorMap, visited);
visited.clear();
}
}
private void assignNumbers(PluginId id, Map<PluginId, IdeaPluginDescriptor> idToDescriptorMap, Stack<PluginId> visited){
visited.push(id);
try {
final IdeaPluginDescriptor ideaPluginDescriptor = idToDescriptorMap.get(id);
if (ideaPluginDescriptor == null || !ideaPluginDescriptor.isEnabled()) {
// missing optional dependency or already disabled due to cycles
return;
}
final PluginId[] parentIds = ideaPluginDescriptor.getDependentPluginIds();
for (final PluginId parentId : parentIds) {
if (visited.contains(parentId)) {
//disable plugins in the cycle
ideaPluginDescriptor.setEnabled(false);
break;
}
}
for (PluginId parentId1 : parentIds) {
assignNumbers(parentId1, idToDescriptorMap, visited);
}
if (!myIdToNumberMap.contains(id)) {
myIdToNumberMap.put(id, myAvailableNumber++);
}
}
finally {
visited.pop();
}
}
public int compare(IdeaPluginDescriptor d1, IdeaPluginDescriptor d2) {
return myIdToNumberMap.get(d1.getPluginId()) - myIdToNumberMap.get(d2.getPluginId());
}
}
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