/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-2009 The eXist team
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $Id: Compile.java 5533 2007-03-26 13:55:42Z ellefj $
*/
package org.exist.xquery.functions.util;
import org.apache.log4j.Logger;
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.Sequence;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.StringValue;
import org.exist.xquery.value.Type;
public class GetSequenceType extends BasicFunction {
protected static final Logger logger = Logger.getLogger(GetSequenceType.class);
public final static FunctionSignature signature =
new FunctionSignature(
new QName("get-sequence-type", UtilModule.NAMESPACE_URI, UtilModule.PREFIX),
"Returns the string representation of the type of sequence.",
new SequenceType[] {
new FunctionParameterSequenceType("sequence-type", Type.ANY_TYPE, Cardinality.ZERO_OR_MORE, "The type of sequence")
},
new FunctionReturnSequenceType(Type.STRING, Cardinality.EXACTLY_ONE, "the string representation of the type of sequence"));
public GetSequenceType(XQueryContext context) {
super(context, signature);
}
public Sequence eval(Sequence[] args, Sequence contextSequence)
throws XPathException {
Sequence seq = args[0];
StringValue stringValue = new StringValue(Type.getTypeName(seq.getItemType()));
return stringValue;
}
}