/*
    * 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.hadoop.chukwa.datacollection.adaptor;
  
  import java.util.*;
  import java.util.regex.*;
  import org.apache.hadoop.chukwa.Chunk;
  import org.apache.hadoop.chukwa.datacollection.ChunkReceiver;
  import org.apache.hadoop.chukwa.datacollection.agent.AdaptorFactory;
  import org.apache.hadoop.chukwa.datacollection.agent.AdaptorManager;
  
  public class AbstractWrapper implements NotifyOnCommitAdaptor,ChunkReceiver {
   
    Adaptor inner;
    String innerClassName;
    String innerType;
    ChunkReceiver dest;
    AdaptorManager manager;
    String adaptorID;
    @Override
    public String getCurrentStatus() {
      return innerClassName + " " + inner.getCurrentStatus();
    }
  
  
    static Pattern p = Pattern.compile("([^ ]+) +([^ ].*)");
    
    /**
     * Note that the name of the inner class will get parsed out as a type
     */
    @Override
    public String parseArgs(String innerClassName, String params, AdaptorManager a) {
      manager = a;
      Matcher m = p.matcher(params);
      this.innerClassName = innerClassName;
      String innerCoreParams;
      if(m.matches()) {
        innerType = m.group(1);
        inner = AdaptorFactory.createAdaptor(innerClassName);
        innerCoreParams = inner.parseArgs(innerType,m.group(2),a);
        return innerClassName + innerCoreParams;
      }
      else return null;
    }
    
    @Override
    public long shutdown(AdaptorShutdownPolicy shutdownPolicy)
        throws AdaptorException {
      return inner.shutdown(shutdownPolicy);
    }
  
    @Override
    public String getType() {
      return innerType;
    }
  
    /**
     * Note that the name of the inner class will get parsed out as a type
     */
    @Override
    public void start(String adaptorID, String type, long offset,
        ChunkReceiver dest) throws AdaptorException {
      String dummyAdaptorID = adaptorID;
      this.dest = dest;
      this.adaptorID = adaptorID;
      inner.start(dummyAdaptorID, type, offset, this);
    }
  
    @Override
    public void add(Chunk event) throws InterruptedException {
      dest.add(event);
    }
  
    @Override
    public void committed(long commitedByte) { }
  
  }