/**
* Copyright (C) 2004 Orbeon, Inc.
*
* 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
* 2.1 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.
*
* The full text of the license is available at http://www.gnu.org/copyleft/lesser.html
*/
package org.orbeon.oxf.transformer.xupdate;
import org.orbeon.dom4j.Namespace;
import org.orbeon.dom4j.QName;
import org.orbeon.jaxen.UnresolvableException;
import org.orbeon.jaxen.VariableContext;
import org.orbeon.oxf.transformer.xupdate.statement.Utils;
public class VariableContextImpl implements VariableContext {
private VariableContextImpl parentContext;
private QName qname;
private Object value;
public VariableContextImpl() {}
public VariableContextImpl(VariableContextImpl parentContext, QName qname, Object value) {
this.parentContext = parentContext;
this.qname = qname;
this.value = value;
}
public Object getVariableValue(String namespaceURI, String prefix, String localName)
throws UnresolvableException {
if (this.qname == null) {
throw new UnresolvableException("Variable '" +
Utils.qualifiedName(prefix, localName) + "' is not defined");
} else {
QName qname = new QName(localName, new Namespace(prefix, namespaceURI));
return this.qname.equals(qname) ? value
: parentContext.getVariableValue(namespaceURI, prefix, localName);
}
}
public void assign(QName qname, Object value) throws UnresolvableException {
if (this.qname == null) {
throw new UnresolvableException("Variable '" + qname.getQualifiedName()
+ "' is not defined");
} else {
if (this.qname.equals(qname)) this.value = value;
else parentContext.assign(qname, value);
}
}
}