DataLink.java :  » Web-Framework » rife-1.6.1 » com » uwyn » rife » engine » Java Open Source

/*
 * Copyright 2001-2007 Geert Bevin <gbevin[remove] at uwyn dot com>
 * Distributed under the terms of either:
 * - the common development and distribution license (CDDL), v1.0; or
 * - the GNU Lesser General Public License, v2.1 or later
 * $Id: DataLink.java 3634 2007-01-08 21:42:24Z gbevin $
 */
package com.uwyn.rife.engine;
  
class DataLink
{
  private String    mOutput = null;
  private ElementInfo  mTarget = null;
  private boolean    mSnapback = false;
  private String    mInput = null;
  private FlowLink  mFlowLink = null;
  
  DataLink(String output, ElementInfo target, boolean snapback, String input, FlowLink flowlink)
  {
    assert output != null;
    assert output.length() > 0;
    assert target != null || snapback;
    assert null == target || !snapback;
    assert input != null;
    assert input.length() > 0;
    
    mOutput = output;
    mTarget = target;
    mSnapback = snapback;
    mInput = input;
    mFlowLink = flowlink;
  }
  
  String getOutput()
  {
    return mOutput;
  }
  
  ElementInfo getTarget()
  {
    return mTarget;
  }
  
  boolean isSnapback()
  {
    return mSnapback;
  }
  
  String getInput()
  {
    return mInput;
  }
  
  FlowLink getFlowLink()
  {
    return mFlowLink;
  }
  
  public int hashCode()
  {
    int target = 1;
    int snapback = 1;
    int flowlink = 1;
    
    if (mTarget != null)
    {
      target = mTarget.hashCode();
    }
    if (mSnapback)
    {
      snapback = 2;
    }
    if (mFlowLink != null)
    {
      flowlink = mFlowLink.hashCode();
    }
    return mOutput.hashCode()*target*snapback*mInput.hashCode()*flowlink;
  }
  
  public boolean equals(Object other)
  {
    if (this == other)
    {
      return true;
    }
    
    if (null == other)
    {
      return false;
    }
    
    if (!(other instanceof DataLink))
    {
      return false;
    }
    
    DataLink other_datalink = (DataLink)other;
    if (!other_datalink.getOutput().equals(getOutput()))
    {
      return false;
    }
    if (other_datalink.getTarget() != null || getTarget() != null)
    {
      if (null == other_datalink.getTarget() && getTarget() != null)
      {
        return false;
      }
      if (other_datalink.getTarget() != null && null == getTarget())
      {
        return false;
      }
      if (!other_datalink.getTarget().equals(getTarget()))
      {
        return false;
      }
    }
    if (other_datalink.isSnapback() != isSnapback())
    {
      return false;
    }
    if (!other_datalink.getInput().equals(getInput()))
    {
      return false;
    }
    if (other_datalink.getFlowLink() != null || getFlowLink() != null)
    {
      if (null == other_datalink.getFlowLink() && getFlowLink() != null)
      {
        return false;
      }
      if (other_datalink.getFlowLink() != null && null == getFlowLink())
      {
        return false;
      }
      if (!other_datalink.getFlowLink().equals(getFlowLink()))
      {
        return false;
      }
    }
    
    return true;
  }
}