/**
 *  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.components.task.AbstractTask;
import com.servingxml.app.Flow;
import com.servingxml.util.record.Record;
import com.servingxml.util.Name;
import com.servingxml.app.ParameterDescriptor;

/**
 * 
 * @author Daniel A. Parker (daniel.parker@servingxml.com)
 */

public class RecordStreamBuilderPrefilter extends AbstractTask   
implements RecordStreamBuilder {
  private final RecordStreamBuilder recordStreamBuilder;
  private final ParameterDescriptor[] parameterDescriptors;

  public RecordStreamBuilderPrefilter(RecordStreamBuilder recordStreamBuilder,
  ParameterDescriptor[] parameterDescriptors) {
    this.recordStreamBuilder = recordStreamBuilder;
    this.parameterDescriptors = parameterDescriptors;
  }

  public RecordPipeline createRecordPipeline(ServiceContext context, Flow flow) {

    Flow newFlow = flow.augmentParameters(context, parameterDescriptors);
    RecordPipeline pipeline = recordStreamBuilder.createRecordPipeline(context, newFlow);
    RecordFilter prefilter = new RecordFilterPrefilter(parameterDescriptors);
    pipeline.addRecordFilter(prefilter);
    return pipeline;
  }

  public void appendToRecordPipeline(ServiceContext context, Flow flow,
  RecordFilterChain pipeline) {

    Flow newFlow = flow.augmentParameters(context, parameterDescriptors);
    RecordFilter prefilter = new RecordFilterPrefilter(parameterDescriptors);
    pipeline.addRecordFilter(prefilter);
    recordStreamBuilder.appendToRecordPipeline(context,newFlow,pipeline);
  }

  public void execute(ServiceContext context, Flow flow) {

    Flow newFlow = flow.augmentParameters(context, parameterDescriptors);
    RecordPipeline recordPipeline = createRecordPipeline(context, newFlow);
    recordPipeline.execute(context);
  }

  public String createString(ServiceContext context, Flow flow) {
    Flow newFlow = flow.augmentParameters(context, parameterDescriptors);
    return super.createString(context,newFlow);
  }
}

