orderappend.java

著名IT公司ILog的APS高级排产优化引擎

package com.power.pipeengine.DispatchReportMap;

/**
 * <p>Title: PIPE Engine</p>
 * <p>Description: Global Planning Optimization Engine</p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: Paraster, Inc.</p>
 * @author not attributable
 * @version 1.0
 */

import java.util.*;

public class OrderAppend {
  private Vector orders = new Vector();
  private Vector styles = new Vector();
  private Vector starts = new Vector();
  private Vector ends = new Vector();

  private static final OrderAppend INSTANCE =
                            new OrderAppend();

 // Private constructor supresses
 // default public constructor
  private OrderAppend( ) {
  }

  public static OrderAppend getInstance( ) {
      return INSTANCE;
  }

  public boolean isAppendable( int numRqdDays, Date endDate ) {
    Calendar cal = Calendar.getInstance();
    for( int i=0; i<starts.size(); i++ ) {
      Date aDate = (Date) ends.elementAt( i );
      cal.setTime( aDate );
      cal.add( Calendar.DAY_OF_YEAR, numRqdDays );

      if( cal.before( endDate ) ) {
        return true;
      }
    }

    return false;
  }

  public Vector getOrder( int numRqdDays, Date endDate ) {
  Calendar cal = Calendar.getInstance();
  for( int i=0; i<starts.size(); i++ ) {
    Date aDate = (Date) ends.elementAt( i );
    cal.setTime( aDate );
    cal.add( Calendar.DAY_OF_YEAR, numRqdDays );

    if( cal.before( endDate ) ) {
      Vector rtnVec = new Vector();
      rtnVec.add( orders.elementAt( i ));
      rtnVec.add( styles.elementAt( i ));
      return rtnVec;
    }
  }

  return null;
}


  public void update( int numRqdDays, Date endDate ) {
    Calendar cal = Calendar.getInstance();
    int minIdx = 0;
    for( int i=0; i<starts.size(); i++ ) {
      Date aDate = (Date) ends.elementAt( i );
      cal.setTime( aDate );
      cal.add( Calendar.DAY_OF_YEAR, numRqdDays );
      if( cal.before( endDate ) ) {
        ends.remove( i );
        ends.insertElementAt( cal.getTime(), i );
        break;
      }
    }
  }

  public void add( String orderID, String styleID, Date start, Date end ) {
    orders.add( orderID );
    styles.add( styleID );
    starts.add( start );
    ends.add( end );
  }
}