content: /*******************************************************************************
   * Copyright 2014 Trevor Robinson
   * 
   * 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 com.scurrilous.circe.params;
  
  import com.scurrilous.circe.HashParameters;
  
  /**
   * Hash parameters consisting only of an algorithm name. Includes instances
   * describing some commonly used algorithms.
   */
  public class SimpleHashParameters implements HashParameters {
  
      private final String algorithm;
  
      /**
       * Constructs a {@link SimpleHashParameters} with the given algorithm name.
       * 
       * @param algorithm the name of the hash algorithm
       */
      public SimpleHashParameters(String algorithm) {
          this.algorithm = algorithm;
      }
  
      @Override
      public String algorithm() {
          return algorithm;
      }
  
      @Override
      public int hashCode() {
          return algorithm.hashCode();
      }
  
      @Override
      public boolean equals(Object obj) {
          if (obj == this)
              return true;
          if (obj == null || obj.getClass() != SimpleHashParameters.class)
              return false;
          return algorithm.equals(((SimpleHashParameters) obj).algorithm);
      }
  
      @Override
      public String toString() {
          return algorithm;
      }
  
      /**
       * Represents the MD5 (128-bit) hash algorithm.
       */
      public static final SimpleHashParameters MD5 = new SimpleHashParameters("MD5");
  
      /**
       * Represents the SHA-1 (160-bit) hash algorithm.
       */
      public static final SimpleHashParameters SHA1 = new SimpleHashParameters("SHA-1");
  
      /**
       * Represents the SHA-256 (256-bit) hash algorithm.
       */
      public static final SimpleHashParameters SHA256 = new SimpleHashParameters("SHA-256");
  
      /**
       * Represents the SHA-384 (384-bit) hash algorithm.
       */
      public static final SimpleHashParameters SHA384 = new SimpleHashParameters("SHA-384");
  
      /**
       * Represents the SHA-512 (512-bit) hash algorithm.
       */
      public static final SimpleHashParameters SHA512 = new SimpleHashParameters("SHA-512");
  }
  