categorykey.java

apache的log4j源码

/*
 * 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.log4j;

/**
   CategoryKey is a wrapper for String that apparently accellerated
   hash table lookup in early JVM's.
   @author Ceki Gülcü 
*/
class CategoryKey {

  String   name;  
  int hashCache;

  CategoryKey(String name) {
    this.name = name;
    hashCache = name.hashCode();
  }

  final
  public  
  int hashCode() {
    return hashCache;
  }

  final
  public
  boolean equals(Object rArg) {
    if(this == rArg)
      return true;
    
    if(rArg != null && CategoryKey.class == rArg.getClass()) 
      return  name.equals(((CategoryKey)rArg ).name);
    else 
      return false;
  }
}