/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-09 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
package org.exist.xquery.functions.fn;
import org.exist.dom.QName;
import org.exist.xquery.BasicFunction;
import org.exist.xquery.Cardinality;
import org.exist.xquery.Dependency;
import org.exist.xquery.Function;
import org.exist.xquery.FunctionSignature;
import org.exist.xquery.Profiler;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.value.AnyURIValue;
import org.exist.xquery.value.FunctionParameterSequenceType;
import org.exist.xquery.value.FunctionReturnSequenceType;
import org.exist.xquery.value.QNameValue;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.StringValue;
import org.exist.xquery.value.Type;
/**
* @author wolf
*
*/
public class QNameFunctions extends BasicFunction {
public final static FunctionSignature prefixFromQName =
new FunctionSignature(
new QName("prefix-from-QName", Function.BUILTIN_FUNCTION_NS),
"Returns an xs:NCName representing the prefix of $arg. If $arg is the empty " +
"sequence, returns the empty sequence.",
new SequenceType[] {
new FunctionParameterSequenceType("arg", Type.QNAME, Cardinality.ZERO_OR_ONE, "The QName")
},
new FunctionReturnSequenceType(Type.NCNAME, Cardinality.ZERO_OR_ONE, "the prefix"));
public final static FunctionSignature localNameFromQName =
new FunctionSignature(
new QName("local-name-from-QName", Function.BUILTIN_FUNCTION_NS),
"Returns an xs:NCName representing the local part of $arg. If $arg is the empty " +
"sequence, returns the empty sequence.",
new SequenceType[] {
new FunctionParameterSequenceType("arg", Type.QNAME, Cardinality.ZERO_OR_ONE, "The QName")
},
new FunctionReturnSequenceType(Type.NCNAME, Cardinality.ZERO_OR_ONE, "the local name"));
public final static FunctionSignature namespaceURIFromQName =
new FunctionSignature(
new QName("namespace-uri-from-QName", Function.BUILTIN_FUNCTION_NS),
"Returns the namespace URI for $arg. If $arg is the empty " +
"sequence, returns the empty sequence.",
new SequenceType[] {
new FunctionParameterSequenceType("arg", Type.QNAME, Cardinality.ZERO_OR_ONE, "The QName")
},
new FunctionReturnSequenceType(Type.ANY_URI, Cardinality.ZERO_OR_ONE, "the namespace URI"));
/**
* @param context
* @param signature
*/
public QNameFunctions(XQueryContext context, FunctionSignature signature) {
super(context, signature);
}
/* (non-Javadoc)
* @see org.exist.xquery.BasicFunction#eval(org.exist.xquery.value.Sequence[], org.exist.xquery.value.Sequence)
*/
public Sequence eval(Sequence[] args, Sequence contextSequence) throws XPathException {
if (context.getProfiler().isEnabled()) {
context.getProfiler().start(this);
context.getProfiler().message(this, Profiler.DEPENDENCIES, "DEPENDENCIES", Dependency.getDependenciesName(this.getDependencies()));
if (contextSequence != null)
{context.getProfiler().message(this, Profiler.START_SEQUENCES, "CONTEXT SEQUENCE", contextSequence);}
}
Sequence result;
if (args[0].isEmpty())
{result = Sequence.EMPTY_SEQUENCE;}
else {
final QNameValue value = (QNameValue) args[0].itemAt(0);
final QName qname = value.getQName();
if (isCalledAs("prefix-from-QName")) {
final String prefix = qname.getPrefix();
if (prefix == null || prefix.length() == 0)
{result = Sequence.EMPTY_SEQUENCE;}
else
{result = new StringValue(prefix, Type.NCNAME);}
} else if (isCalledAs("local-name-from-QName"))
{result = new StringValue(qname.getLocalName(), Type.NCNAME);}
else {
// fn:namespace-uri-from-QName
String uri = qname.getNamespaceURI();
if (uri == null)
{uri = "";}
result = new AnyURIValue(uri);
}
}
if (context.getProfiler().isEnabled())
{context.getProfiler().end(this, "", result);}
return result;
}
}