/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.sling.resourceresolver.impl.providers.tree;
import static org.apache.commons.lang3.StringUtils.split;
import java.util.Iterator;
import java.util.List;
public class PathTree<T extends Pathable> {
private Node<T> root;
public PathTree(List<T> values) {
this.root = new Node<>();
for (T v : values) {
addNewValue(v);
}
}
private void addNewValue(T value) {
Node<T> node = root;
for (String segment : split(value.getPath(), '/')) {
if (node.hasChild(segment)) {
node = node.getChild(segment);
} else {
node = node.addChild(segment);
}
}
node.setValue(value);
}
public Node<T> getBestMatchingNode(final String path) {
if (path == null || path.isEmpty() || path.charAt(0) != '/') {
return null;
}
Node<T> result = root.getValue() != null ? root : null;
Node<T> node = root;
Iterator<String> it = new PathSegmentIterator(path, 1);
while (it.hasNext()) {
String segment = it.next();
node = node.getChild(segment);
if (node == null) {
break;
} else {
if (node.getValue() != null) {
result = node;
}
}
}
return result;
}
public Node<T> getNode(String path) {
if (path == null || path.isEmpty() || path.charAt(0) != '/') {
return null;
}
Node<T> node = root;
Iterator<String> it = new PathSegmentIterator(path, 1);
while (it.hasNext()) {
String segment = it.next();
node = node.getChild(segment);
if (node == null) {
return null;
}
}
return node;
}
}