/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.commons.jxpath.ri.model;
import java.util.Locale;
import org.apache.commons.jxpath.JXPathContext;
import org.apache.commons.jxpath.Variables;
import org.apache.commons.jxpath.ri.QName;
/**
* NodePointerFactory to create {@link VariablePointer VariablePointers}.
* @author Matt Benson
* @since JXPath 1.3
* @version $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
*/
public class VariablePointerFactory implements NodePointerFactory {
/** factory order constant */
public static final int VARIABLE_POINTER_FACTORY_ORDER = 890;
/**
* Node value wrapper to trigger a VariablePointerFactory.
*/
public static final class VariableContextWrapper {
private final JXPathContext context;
/**
* Create a new VariableContextWrapper.
* @param context to wrap
*/
private VariableContextWrapper(JXPathContext context) {
this.context = context;
}
/**
* Get the original (unwrapped) context.
*
* @return JXPathContext.
*/
public JXPathContext getContext() {
return context;
}
}
/**
* VariableContextWrapper factory method.
* @param context the JXPathContext to wrap.
* @return VariableContextWrapper.
*/
public static VariableContextWrapper contextWrapper(JXPathContext context) {
return new VariableContextWrapper(context);
}
public NodePointer createNodePointer(QName name, Object object,
Locale locale) {
if (object instanceof VariableContextWrapper) {
JXPathContext varCtx = ((VariableContextWrapper) object).getContext();
while (varCtx != null) {
Variables vars = varCtx.getVariables();
if (vars.isDeclaredVariable(name.toString())) {
return new VariablePointer(vars, name);
}
varCtx = varCtx.getParentContext();
}
// The variable is not declared, but we will create
// a pointer anyway in case the user wants to set, rather
// than get, the value of the variable.
return new VariablePointer(name);
}
return null;
}
public NodePointer createNodePointer(NodePointer parent, QName name,
Object object) {
return createNodePointer(name, object, null);
}
public int getOrder() {
return VARIABLE_POINTER_FACTORY_ORDER;
}
}