Package de.iritgo.aktera.clients

Source Code of de.iritgo.aktera.clients.BeanComparator

/**
* This file is part of the Iritgo/Aktera Framework.
*
* Copyright (C) 2005-2011 Iritgo Technologies.
* Copyright (C) 2003-2005 BueroByte GbR.
*
* Iritgo 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 de.iritgo.aktera.clients;


import org.apache.commons.beanutils.DynaBean;
import java.text.Collator;
import java.util.Comparator;


/**
* @author root
*
* To change this generated comment edit the template variable "typecomment":
* Window>Preferences>Java>Templates.
* To enable and disable the creation of type comments go to
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*/
public class BeanComparator implements Comparator
{
  private String valueName = null;

  /**
   * Constructor for BeanComparator.
   */
  public BeanComparator(String newValue)
  {
    super();
    valueName = newValue;
  }

  /**
   * @see java.util.Comparator#compare(Object, Object)
   */
  public int compare(Object o1, Object o2)
  {
    int returnValue = - 1;

    /* Can't compare anything except dynabeans */
    if ((! (o1 instanceof DynaBean)) || (! (o2 instanceof DynaBean)))
    {
      throw new IllegalArgumentException("Objects are not dynabeans");
    }

    DynaBean db1 = (DynaBean) o1;
    DynaBean db2 = (DynaBean) o2;
    Object oneVal = db1.get(valueName);
    Object twoVal = db2.get(valueName);

    if ((oneVal == null) && (twoVal == null))
    {
      returnValue = 0;
    }

    if (oneVal == null)
    {
      returnValue = - 1;
    }

    if (twoVal == null)
    {
      returnValue = 1;
    }

    Collator c = Collator.getInstance();

    returnValue = c.compare(oneVal.toString(), twoVal.toString());

    return returnValue;
  }
}
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