content: /**
   * 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.activemq.filter;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import jakarta.jms.JMSException;
  
  import org.apache.activemq.command.ActiveMQDestination;
  import org.apache.activemq.command.Message;
  
  /**
   * Helper class for decomposing a Destination into a number of paths
   * 
   * 
   */
  public final class DestinationPath {
      protected static final char SEPARATOR = '.';
  
      private DestinationPath() {    
      }
      
      public static String[] getDestinationPaths(String subject) {
          List<String> list = new ArrayList<String>();
          int previous = 0;
          int lastIndex = subject.length() - 1;
          while (true) {
              int idx = subject.indexOf(SEPARATOR, previous);
              if (idx < 0) {
                  list.add(subject.substring(previous, lastIndex + 1));
                  break;
              }
              list.add(subject.substring(previous, idx));
              previous = idx + 1;
          }
          String[] answer = new String[list.size()];
          list.toArray(answer);
          return answer;
      }
  
      public static String[] getDestinationPaths(Message message) throws JMSException {
          return getDestinationPaths(message.getDestination());
      }
  
      public static String[] getDestinationPaths(ActiveMQDestination destination) {
          return getDestinationPaths(destination.getPhysicalName());
      }
  
      /**
       * Converts the paths to a single String seperated by dots.
       * 
       * @param paths
       * @return
       */
      public static String toString(String[] paths) {
          StringBuilder buffer = new StringBuilder();
          for (int i = 0; i < paths.length; i++) {
              if (i > 0) {
                  buffer.append(SEPARATOR);
              }
              String path = paths[i];
              if (path == null) {
                  buffer.append("*");
              } else {
                  buffer.append(path);
              }
          }
          return buffer.toString();
      }
  }
  