/*
    * 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.analysis.salsa.fsm;
  
  import java.util.StringTokenizer;
  
  /**
   * Parse Utilities for Parsing ChukwaRecords for FSMBuilder Mappers
   *
   */
  
  public class ParseUtilities {
  	
  	public static FSMIntermedEntry splitChukwaRecordKey
  		(String origkey, FSMIntermedEntry rec, String delim) 
  		throws Exception
  	{
  		StringTokenizer st = new StringTokenizer(origkey, delim);
  		if (st.countTokens() != 3) {
  			throw new Exception("Expected 3 tokens from ChukwaRecordKey but only found " + st.countTokens() + ".");
  		}
  		rec.time_orig_epoch = new String(st.nextToken());
  		rec.job_id = new String(st.nextToken());
  		rec.time_orig = new String(st.nextToken());
  		return rec;
  	}
  	
  	public static String extractHostnameFromTrackerName (String trackerName) 
  	{
  		int firstPos = "tracker_".length();
  		int secondPos;
  		String hostname = new String("");
  		
  		if (trackerName.startsWith("tracker_")) {
  			secondPos = trackerName.indexOf(":",firstPos);
  			hostname = trackerName.substring(firstPos, secondPos);
  		}
  		
  		return hostname;
  	}
  	
  	public static String removeRackFromHostname (String origHostname) 
  	{
  		int pos = origHostname.lastIndexOf("/");
  		if (pos > -1) {
  			return new String(origHostname.substring(pos));
  		} else {
  			return new String(origHostname);
  		}
  	}
  	
  }