/*
* eXist Open Source Native XML Database
* Copyright (C) 2007-09 The eXist Project
* 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* $Id: UUID.java 10203 2009-10-08 15:20:09Z ellefj $
*/
package org.exist.xquery.functions.util;
import org.exist.dom.QName;
import org.exist.xquery.BasicFunction;
import org.exist.xquery.Cardinality;
import org.exist.xquery.FunctionSignature;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.value.FunctionParameterSequenceType;
import org.exist.xquery.value.FunctionReturnSequenceType;
import org.exist.xquery.value.IntegerValue;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.Type;
/**
* @author Andrzej Taramina
*/
public class Wait extends BasicFunction
{
public final static FunctionSignature signatures[] = {
new FunctionSignature (
new QName( "wait", UtilModule.NAMESPACE_URI, UtilModule.PREFIX ),
"Wait for the specified number of milliseconds",
new SequenceType[]{
new FunctionParameterSequenceType( "interval", Type.INTEGER, Cardinality.EXACTLY_ONE, "Number of milliseconds to wait." ),
},
new FunctionReturnSequenceType( Type.ITEM, Cardinality.EMPTY, "Returns an empty sequence" )
)
};
public Wait( XQueryContext context, FunctionSignature signature )
{
super( context, signature );
}
@Override
public Sequence eval( Sequence[] args, Sequence contextSequence ) throws XPathException
{
long interval = ((IntegerValue)args[0].itemAt(0)).getLong();
if( interval > 0 ) {
try {
Thread.sleep( interval );
}
catch( InterruptedException e ) {
}
}
return( Sequence.EMPTY_SEQUENCE );
}
}