/*
* $Id: ScopesHashModel.java 451544 2006-09-30 05:38:02Z mrdon $
*
* Copyright 2006 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.
*/
package org.apache.struts2.views.freemarker;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import com.opensymphony.xwork2.util.ValueStack;
import freemarker.template.ObjectWrapper;
import freemarker.template.SimpleHash;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;
/**
* Simple Hash model that also searches other scopes.
* <p/>
* If the key doesn't exist in this hash, this template model tries to
* resolve the key within the attributes of the following scopes,
* in the order stated: Request, Session, Servlet Context
*/
public class ScopesHashModel extends SimpleHash {
private static final long serialVersionUID = 5551686380141886764L;
private HttpServletRequest request;
private ServletContext servletContext;
private ValueStack stack;
public ScopesHashModel(ObjectWrapper objectWrapper, ServletContext context, HttpServletRequest request, ValueStack stack) {
super(objectWrapper);
this.servletContext = context;
this.request = request;
this.stack = stack;
}
public TemplateModel get(String key) throws TemplateModelException {
// Lookup in default scope
TemplateModel model = super.get(key);
if (model != null) {
return model;
}
if (stack != null) {
Object obj = stack.findValue(key);
if (obj != null) {
return wrap(obj);
}
// ok, then try the context
obj = stack.getContext().get(key);
if (obj != null) {
return wrap(obj);
}
}
if (request != null) {
// Lookup in request scope
Object obj = request.getAttribute(key);
if (obj != null) {
return wrap(obj);
}
// Lookup in session scope
HttpSession session = request.getSession(false);
if (session != null) {
obj = session.getAttribute(key);
if (obj != null) {
return wrap(obj);
}
}
}
if (servletContext != null) {
// Lookup in application scope
Object obj = servletContext.getAttribute(key);
if (obj != null) {
return wrap(obj);
}
}
return null;
}
public void put(String string, boolean b) {
super.put(string, b);
}
public void put(String string, Object object) {
super.put(string, object);
}
}