/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// $Id: JAXPVariableStack.java,v 1.1.2.1 2005/08/01 01:30:17 jeffsuttor Exp $
package com.sun.org.apache.xpath.internal.jaxp;
import javax.xml.transform.TransformerException;
import javax.xml.xpath.XPathVariableResolver;
import com.sun.org.apache.xml.internal.utils.QName;
import com.sun.org.apache.xpath.internal.VariableStack;
import com.sun.org.apache.xpath.internal.XPathContext;
import com.sun.org.apache.xpath.internal.objects.XObject;
import com.sun.org.apache.xpath.internal.res.XPATHErrorResources;
import com.sun.org.apache.xalan.internal.res.XSLMessages;
/**
* Overrides {@link VariableStack} and delegates the call to
* {@link javax.xml.xpath.XPathVariableResolver}.
*
* @author Ramesh Mandava ( ramesh.mandava@sun.com )
*/
public class JAXPVariableStack extends VariableStack {
private final XPathVariableResolver resolver;
public JAXPVariableStack(XPathVariableResolver resolver) {
this.resolver = resolver;
}
public XObject getVariableOrParam(XPathContext xctxt, QName qname)
throws TransformerException,IllegalArgumentException {
if ( qname == null ) {
//JAXP 1.3 spec says that if variable name is null then
// we need to through IllegalArgumentException
String fmsg = XSLMessages.createXPATHMessage(
XPATHErrorResources.ER_ARG_CANNOT_BE_NULL,
new Object[] {"Variable qname"} );
throw new IllegalArgumentException( fmsg );
}
javax.xml.namespace.QName name =
new javax.xml.namespace.QName(
qname.getNamespace(),
qname.getLocalPart());
Object varValue = resolver.resolveVariable( name );
if ( varValue == null ) {
String fmsg = XSLMessages.createXPATHMessage(
XPATHErrorResources.ER_RESOLVE_VARIABLE_RETURNS_NULL,
new Object[] { name.toString()} );
throw new TransformerException( fmsg );
}
return XObject.create( varValue, xctxt );
}
}