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/*
* This file is part of rasdaman community.
*
* Rasdaman community is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rasdaman community is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with rasdaman community. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
rasdaman GmbH.
*
* For more information please see <http://www.rasdaman.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
*/
/** ***********************************************************
* <pre>
*
* PURPOSE:
*
*
*
* COMMENTS:
*
* </pre>
*********************************************************** */
package rasj.odmg;
import org.odmg.*;
import rasj.global.*;
import java.util.*;
/**
* This class implements the ODMG DBag interface.
* @version $Revision: 1.3 $
*/
public class RasBag extends RasCollection implements DBag
{
static final String rcsid = "@(#)Package rasj.odmg, class RasBag: $Header: /home/rasdev/CVS-repository/rasdaman/java/rasj/odmg/RasBag.java,v 1.3 2003/12/19 15:42:56 rasdev Exp $";
List content;
/**
* constructor
*/
public RasBag()
{
Debug.enterVerbose( "RasBag.constructor start." );
content = new ArrayList();
Debug.leaveVerbose( "RasBag.constructor done." );
}
/**
* Appends the specified element to this Bag.
*/
public boolean add(Object o)
{
boolean result = content.add(o);
Debug.talkVerbose( "RasBag.add: result=" + result );
return result;
}
/**
* This method returns the number of occurrences of the object obj in the DBag collection.
*/
public int occurrences(java.lang.Object obj)
{
Debug.enterVerbose( "RasBag.occurrences start." );
DBag tmpBag = new RasBag();
tmpBag.addAll(content);
int count = 0;
while(tmpBag.contains(obj))
{
count++;
tmpBag.remove(obj);
}
Debug.leaveVerbose( "RasBag.occurrences done. count=" + count );
return count;
}
/**
* A new DBag instance is created that contains the difference of this object and the DBag instance referenced by otherBag.
*/
public DBag difference(DBag otherBag)
{
Debug.enterVerbose( "RasBag.difference start." );
DBag diffBag = new RasBag();
diffBag.addAll(otherBag);
DBag retBag = new RasBag();
Iterator it = content.iterator();
Object tmp;
while(it.hasNext())
{
tmp = it.next();
if(!diffBag.contains(tmp))
retBag.add(tmp);
else
diffBag.remove(tmp);
}
retBag.addAll(diffBag);
Debug.leaveVerbose( "RasBag.difference done." );
return retBag;
}
/**
* A new DBag instance is created that contains the intersection of this object and the DBag referenced by otherBag.
*/
public DBag intersection(DBag otherBag)
{
Debug.enterVerbose( "RasBag.intersection start." );
DBag intBag = new RasBag();
intBag.addAll(otherBag);
DBag retBag = new RasBag();
Iterator it = content.iterator();
Object tmp;
while(it.hasNext())
{
tmp = it.next();
if(intBag.contains(tmp))
{
retBag.add(tmp);
intBag.remove(tmp);
}
}
Debug.leaveVerbose( "RasBag.intersection done." );
return retBag;
}
/**
* A new DBag instance is created that is the union of this object and otherBag.
*/
public DBag union(DBag otherBag)
{
Debug.enterVerbose( "RasBag.union start." );
DBag retBag = new RasBag();
retBag.addAll(content);
retBag.addAll(otherBag);
Debug.leaveVerbose( "RasBag.union done." );
return retBag;
}
/**
* Returns an iterator over the elements in this Bag in proper sequence.
*/
public Iterator iterator()
{
Debug.talkVerbose( "RasBag.iterator." );
return content.iterator();
}
/**
* Returns the number of elements in this Bag.
*/
public int size()
{
int result = content.size();
Debug.talkVerbose( "RasBag.size: size=" + result );
return result;
}
} // RasBag
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