/*

  * 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.commons.functor.core.algorithm;

 import java.io.Serializable;

 import org.apache.commons.functor.Predicate;

 import org.apache.commons.functor.Procedure;

 /**

  * Base class for predicated procedure algorithms.

  *

  * @version $Revision: 1156320 $ $Date: 2011-08-10 21:14:50 +0200 (Wed, 10 Aug 2011) $

  */

 abstract class PredicatedLoop implements Procedure, Serializable {

     /**

      * serialVersionUID declaration.

      */

     private static final long serialVersionUID = 3221684231735316893L;

     private final Procedure body;

     private final Predicate test;

     /**

      * Create a new PredicatedLoop.

      * @param body to execute

      * @param test whether to keep going

      */

     protected PredicatedLoop(Procedure body, Predicate test) {

         this.body = body;

         this.test = test;

     }

     /**

      * Get the body of this loop.

      * @return Procedure

      */

     protected Procedure getBody() {

         return body;

     }

     /**

      * Get the test for this loop.

      * @return Predicate

      */

     protected Predicate getTest() {

         return test;

     }

     /**

      * {@inheritDoc}

      */

     public boolean equals(Object obj) {

         if (obj == this) {

             return true;

         }

         if (obj == null || !obj.getClass().equals(getClass())) {

             return false;

         }

         PredicatedLoop other = (PredicatedLoop) obj;

         return other.body.equals(body) && other.test.equals(test);

     }

     /**

      * {@inheritDoc}

      */

     public int hashCode() {

         String classname = getClass().getName();

         int dot = classname.lastIndexOf('.');

         int result = classname.substring(dot + 1).hashCode();

         result <<= 2;

         result ^= body.hashCode();

         result <<= 2;

         result ^= test.hashCode();

         return result;

     }

 }