org.modeshape.jcr.cache.PathCache Maven / Gradle / Ivy
/*
* ModeShape (http://www.modeshape.org)
*
* 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 org.modeshape.jcr.cache;
import java.util.HashMap;
import java.util.Map;
import org.modeshape.jcr.value.Path;
/**
* A simple cache of node paths, useful when obtaining the path for many nodes on a subgraph.
*/
public class PathCache {
private final NodeCache cache;
private final Map paths = new HashMap();
public PathCache( NodeCache cache ) {
this.cache = cache;
}
public NodeCache getCache() {
return cache;
}
public Path getPath( CachedNode node ) {
NodeKey key = node.getKey();
Path path = paths.get(key);
if (path == null) {
path = node.getPath(this);
paths.put(key, path); // even if null
}
return path;
}
public boolean removePath( NodeKey key ) {
return paths.remove(key) != null;
}
}
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