cvs commit: incubator-geronimo/applications/jmxdebug/src/java/org/apache/geronimo/jmxdebug/util ObjectInstanceComparator.java

[geirm]

geirm       2004/02/18 07:32:31

  Added:       applications/jmxdebug/src/java/org/apache/geronimo/jmxdebug/util
                        ObjectInstanceComparator.java
  Log:
  Norm's comparitor from the console-web, as I don't want to depend on
  that tree for now
  
  Revision  Changes    Path
  1.1                  
incubator-geronimo/applications/jmxdebug/src/java/org/apache/geronimo/jmxdebug/util/ObjectInstanceComparator.java
  
  Index: ObjectInstanceComparator.java
  ===================================================================
  /**
   *
   * Copyright 2004 The Apache Software Foundation
   *
   *  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.apache.geronimo.jmxdebug.util;
  
  import java.util.Comparator;
  import java.util.StringTokenizer;
  import javax.management.ObjectInstance;
  import javax.management.ObjectName;
  
  /**
   *  Taken from orignial console-web module
   *
   * This class sort ObjectNames by canonical name.  Unfortunately, it
   * will not place single token domains before multiple token domains of
   * the same type (foo.bar > foo at the moment).
   *
   * @version $Revision: 1.1 $ $Date: 2004/02/18 15:32:31 $
   */
  public class ObjectInstanceComparator implements Comparator {
      private static final int LEFT_GREATER = 1;
      private static final int RIGHT_GREATER = -1;
      private static final int EQUAL = 0;
  
      public int compare(Object o1, Object o2) {
          ObjectName left = ((ObjectInstance) o1).getObjectName();
          ObjectName right = ((ObjectInstance) o2).getObjectName();
          String leftName = left.getCanonicalName();
          String rightName = right.getCanonicalName();
  
          StringTokenizer leftDomainTokenizer =
                  new StringTokenizer(leftName, ".");
  
          StringTokenizer rightDomainTokenizer =
                  new StringTokenizer(rightName, ".");
  
          while (leftDomainTokenizer.hasMoreTokens()) {
              if (!rightDomainTokenizer.hasMoreTokens()) {
                  return RIGHT_GREATER;
              }
              String leftToken = leftDomainTokenizer.nextToken();
              String rightToken = rightDomainTokenizer.nextToken();
              int comparison = leftToken.compareToIgnoreCase(rightToken);
              if (comparison != 0) {
                  return comparison;
              }
          }
  
          // left has no more tokens
          if (rightDomainTokenizer.hasMoreTokens()) {
              return LEFT_GREATER;
          }
          // both ran out of tokens so they are equal
          return EQUAL;
      }
  }