001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018package org.apache.activemq.filter; 019 020import java.util.ArrayList; 021import java.util.List; 022 023import javax.jms.JMSException; 024 025import org.apache.activemq.command.ActiveMQDestination; 026import org.apache.activemq.command.Message; 027 028/** 029 * Helper class for decomposing a Destination into a number of paths 030 * 031 * 032 */ 033public final class DestinationPath { 034 protected static final char SEPARATOR = '.'; 035 036 private DestinationPath() { 037 } 038 039 public static String[] getDestinationPaths(String subject) { 040 List<String> list = new ArrayList<String>(); 041 int previous = 0; 042 int lastIndex = subject.length() - 1; 043 while (true) { 044 int idx = subject.indexOf(SEPARATOR, previous); 045 if (idx < 0) { 046 list.add(subject.substring(previous, lastIndex + 1)); 047 break; 048 } 049 list.add(subject.substring(previous, idx)); 050 previous = idx + 1; 051 } 052 String[] answer = new String[list.size()]; 053 list.toArray(answer); 054 return answer; 055 } 056 057 public static String[] getDestinationPaths(Message message) throws JMSException { 058 return getDestinationPaths(message.getDestination()); 059 } 060 061 public static String[] getDestinationPaths(ActiveMQDestination destination) { 062 return getDestinationPaths(destination.getPhysicalName()); 063 } 064 065 /** 066 * Converts the paths to a single String seperated by dots. 067 * 068 * @param paths 069 * @return 070 */ 071 public static String toString(String[] paths) { 072 StringBuffer buffer = new StringBuffer(); 073 for (int i = 0; i < paths.length; i++) { 074 if (i > 0) { 075 buffer.append(SEPARATOR); 076 } 077 String path = paths[i]; 078 if (path == null) { 079 buffer.append("*"); 080 } else { 081 buffer.append(path); 082 } 083 } 084 return buffer.toString(); 085 } 086}