juzu.impl.asset.AssetGraph Maven / Gradle / Ivy
/*
* Copyright 2013 eXo Platform SAS
*
* 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 juzu.impl.asset;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;
/**
* @author Julien Viet
*/
class AssetGraph extends HashMap> {
AssetGraph() {
}
AssetGraph(AssetGraph that) {
super(that);
}
boolean register(String id, String deployedId) {
if (check(deployedId, id)) {
Set a = get(id);
if (a == null) {
put(id, Collections.singleton(deployedId));
} else if (!(a instanceof HashSet)) {
a = new HashSet(a);
a.add(deployedId);
put(id, Collections.unmodifiableSet(a));
}
return true;
} else {
return false;
}
}
void unregister(String id, String deployedId) {
Set a = new HashSet(get(id));
a.remove(deployedId);
put(id, Collections.unmodifiableSet(a));
}
private boolean check(String node, String id) {
Set s = get(node);
if (s != null && s.size() > 0) {
if (s.contains(id)) {
return false;
} else {
for (String t : s) {
if (!check(t, id)) {
return false;
}
}
}
}
return true;
}
}