/**
 *  ServingXML
 *  
 *  Copyright (C) 2006  Daniel Parker
 *    daniel.parker@servingxml.com 
 * 
 * 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.servingxml.components.recordio;

import com.servingxml.app.ServiceContext;
import com.servingxml.app.Flow;
import com.servingxml.util.ServingXmlException;
import com.servingxml.util.record.Record;

/**
 * An <code>AbstractRecordWriterFactory</code> provides a default implementation
 * for some methods of a <code>RecordWriterFactory</code>
 * 
 * @author Daniel A. Parker (daniel.parker@servingxml.com)
 */

public abstract class AbstractRecordWriterFactory  
implements RecordWriterFactory, RecordFilterAppender {     

  public RecordPipeline createRecordPipeline(ServiceContext context, Flow flow) {

    throw new ServingXmlException("Record stream must begin with a reader.");
  }                           

  public abstract RecordWriter createRecordWriter(ServiceContext context, Flow flow);

  public void appendToRecordPipeline(ServiceContext context, Flow flow,
                              RecordFilterChain pipeline) {
    RecordWriter recordWriter = createRecordWriter(context, flow);
    pipeline.addRecordFilter(new RecordWriterFilterAdaptor(recordWriter));
  }
}
