cvs commit: jakarta-turbine-jcs/sandbox/yajcache/src/org/apache/jcs/yajcache/util EqualsUtils.java

[hc...@apache.org]

hchar       2005/01/29 03:57:19

  Added:       sandbox/yajcache/src/org/apache/jcs/yajcache/util
                        EqualsUtils.java
  Log:
  equals utils
  
  Revision  Changes    Path
  1.1                  jakarta-turbine-jcs/sandbox/yajcache/src/org/apache/jcs/yajcache/util/EqualsUtils.java
  
  Index: EqualsUtils.java
  ===================================================================
  
  /*
   * Copyright 2001-2004 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.jcs.yajcache.util;
  
  import java.util.Arrays;
  
  /**
   * @author Hanson Char
   */
  public enum EqualsUtils {
      inst;
  
      /**
       * Returns true if the two input arguments are equal, handling cases
       * when they are arrays.  
       * Returns false otherwise.
       */
      public boolean equals(Object lhs, Object rhs) {
          if (lhs == rhs)
              return true;
          if (lhs == null || rhs == null)
              return false;
          Class lClass = lhs.getClass();
          Class rClass = rhs.getClass();
          
          if (lClass.isArray()
          &&  rClass.isArray())
          {
              Class lCompType = lClass.getComponentType();
              Class rCompType = rClass.getComponentType();
              
              if (lCompType.isPrimitive()) {
                  if (rCompType.isPrimitive()) {
                      if (lCompType != rCompType)
                          return false;
                      if (lCompType == int.class)
                          return Arrays.equals((int[])lhs, (int[])rhs);
                      if (lCompType == boolean.class)
                          return Arrays.equals((boolean[])lhs, (boolean[])rhs);
                      if (lCompType == byte.class)
                          return Arrays.equals((byte[])lhs, (byte[])rhs);
                      if (lCompType == char.class)
                          return Arrays.equals((char[])lhs, (char[])rhs);
                      if (lCompType == double.class)
                          return Arrays.equals((double[])lhs, (double[])rhs);
                      if (lCompType == float.class)
                          return Arrays.equals((float[])lhs, (float[])rhs);
                      if (lCompType == long.class)
                          return Arrays.equals((long[])lhs, (long[])rhs);
                      if (lCompType == short.class)
                          return Arrays.equals((short[])lhs, (short[])rhs);
                  }
                  return false;
              }
              else {
                  if (rCompType.isPrimitive())
                      return false;
                  return Arrays.equals((Object[])lhs, (Object[])rhs);
              }
          }
          return lhs.equals(rhs);
      }
  }
  
  
  

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