/*
* 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.jackrabbit.commons.predicate;
import java.util.regex.Pattern;
import javax.jcr.Item;
import javax.jcr.RepositoryException;
/**
* The path filter provides hierarchical filtering.
*
*/
public class PathPredicate implements Predicate {
/**
* the internal regex pattern
*/
protected final Pattern regex;
/**
* Creates a new default path filter
* <pre>
* | Pattern | Matches
* | /foo | exactly "/foo"
* | /foo.* | all paths starting with "foo."
* | foo.* | all files starting with "foo."
* | /foo/* | all direct children of /foo
* | /foo/** | all children of /foo
* </pre>
* @param pattern the pattern
*/
public PathPredicate(String pattern) {
String suffix = "";
String prefix = "";
if (pattern.endsWith("/**")) {
suffix = "/.*";
pattern = pattern.substring(0, pattern.length() - 3);
} else if (pattern.endsWith("*")) {
suffix = "[^/]*$";
pattern = pattern.substring(0, pattern.length() - 1);
}
if (pattern.charAt(0) != '/') {
prefix = "^.*/";
}
pattern = prefix + pattern.replaceAll("\\.", "\\\\.") + suffix;
regex = Pattern.compile(pattern);
}
/**
* @see Predicate#evaluate(java.lang.Object)
*/
public boolean evaluate(Object item) {
if ( item instanceof Item ) {
try {
return regex.matcher(((Item)item).getPath()).matches();
} catch (RepositoryException re) {
return false;
}
}
return false;
}
}