[Exist-commits] eXist-1.0/src/org/exist/xquery/functions FunUnordered.java,NONE,1.1 ModuleImpl.java,1.2,1.3

[Wolfgang M. M. <wol...@us...>]

Update of /cvsroot/exist/eXist-1.0/src/org/exist/xquery/functions
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv30022/src/org/exist/xquery/functions

Modified Files:
	ModuleImpl.java 
Added Files:
	FunUnordered.java 
Log Message:
Added fn:unordered function.

--- NEW FILE: FunUnordered.java ---
/*
 *  eXist Open Source Native XML Database
 *  Copyright (C) 2001-04 Wolfgang M. Meier
 *  wol...@ex...
 *  http://exist-db.org
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *
 *  This program 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 * 
 *  $Id: FunUnordered.java,v 1.1 2004/06/03 10:27:05 wolfgang_m Exp $
 */
package org.exist.xquery.functions;

import org.exist.dom.QName;
import org.exist.xquery.Cardinality;
import org.exist.xquery.Function;
import org.exist.xquery.FunctionSignature;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.value.Item;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.Type;


/**
 * The XQuery fn:unordered function. Currently, this function has no effect in eXist,
 * but it might be used for future optimizations.
 * 
 * @author wolf
 */
public class FunUnordered extends Function {

    public final static FunctionSignature signature =
		new FunctionSignature(
			new QName("unordered", BUILTIN_FUNCTION_NS),
			"Takes a sequence as input and returns an arbitrary implementation dependent permutation " +
			"of the input sequence. Currently, this has no effect in eXist, but it might be used for future optimizations.",
			new SequenceType[] {
				 new SequenceType(Type.ITEM, Cardinality.ZERO_OR_MORE)
			},
			new SequenceType(Type.ITEM, Cardinality.ZERO_OR_MORE));
    
    public FunUnordered(XQueryContext context) {
        super(context, signature);
    }
    
    /* (non-Javadoc)
     * @see org.exist.xquery.Expression#eval(org.exist.xquery.value.Sequence, org.exist.xquery.value.Item)
     */
    public Sequence eval(Sequence contextSequence, Item contextItem)
            throws XPathException {
        return getArgument(0).eval(contextSequence, contextItem);
    }

    
    /* (non-Javadoc)
     * @see org.exist.xquery.Function#getCardinality()
     */
    public int getCardinality() {
        return getArgument(0).getCardinality();
    }
    
    
    /* (non-Javadoc)
     * @see org.exist.xquery.Function#returnsType()
     */
    public int returnsType() {
        return getArgument(0).returnsType();
    }
}

Index: ModuleImpl.java
===================================================================
RCS file: /cvsroot/exist/eXist-1.0/src/org/exist/xquery/functions/ModuleImpl.java,v
retrieving revision 1.2
retrieving revision 1.3
diff -C2 -d -r1.2 -r1.3
*** ModuleImpl.java	28 May 2004 10:54:09 -0000	1.2
--- ModuleImpl.java	3 Jun 2004 10:27:05 -0000	1.3
***************
*** 99,102 ****
--- 99,103 ----
  		new FunctionDef(FunUpperCase.signature, FunUpperCase.class),
  		new FunctionDef(FunZeroOrOne.signature, FunZeroOrOne.class),
+ 		new FunctionDef(FunUnordered.signature, FunUnordered.class),
  		new FunctionDef(ExtCollection.signature, ExtCollection.class),
  		new FunctionDef(ExtXCollection.signature, ExtXCollection.class),