/*

  * 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.pipeline.testFramework;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 import org.apache.commons.pipeline.*;

 import org.apache.commons.pipeline.validation.ConsumedTypes;

 import org.apache.commons.pipeline.validation.ProducesConsumed;

 /**

  * This stage will generate {@link StageException}s for every other object this

  * stage processes. By design, the even numbered objects will cause a <CODE>StageException</CODE>

  * to be thrown (counting the first object as 1).

  */

 @ConsumedTypes(Object.class)

 @ProducesConsumed

 public class FaultingTestStage extends TestStage {

     private Log log = LogFactory.getLog(FaultingTestStage.class);

     private int counter = 0;

     public FaultingTestStage(int index) {

         super(index);

     }

     public void process(Object obj) throws StageException {

         if (++counter % 2 == 0) {

             log.error("Planned fault in stage " + this + ".");

             throw new StageException(this, "Planned fault in stage " + super.getIndex() + ".");

         }

         super.process(obj);

     }

 }