| /* |
| * $Id$ |
| * |
| * 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.velocity; |
| |
| import org.apache.velocity.VelocityContext; |
| |
| import com.opensymphony.xwork2.util.OgnlValueStack; |
| |
| |
| /** |
| */ |
| public class StrutsVelocityContext extends VelocityContext { |
| |
| private static final long serialVersionUID = 8497212428904436963L; |
| OgnlValueStack stack; |
| VelocityContext[] chainedContexts; |
| |
| |
| public StrutsVelocityContext(OgnlValueStack stack) { |
| this(null, stack); |
| } |
| |
| public StrutsVelocityContext(VelocityContext[] chainedContexts, OgnlValueStack stack) { |
| this.chainedContexts = chainedContexts; |
| this.stack = stack; |
| } |
| |
| |
| public boolean internalContainsKey(Object key) { |
| boolean contains = super.internalContainsKey(key); |
| |
| // first let's check to see if we contain the requested key |
| if (contains) { |
| return true; |
| } |
| |
| // if not, let's search for the key in the ognl value stack |
| if (stack != null) { |
| Object o = stack.findValue(key.toString()); |
| |
| if (o != null) { |
| return true; |
| } |
| |
| o = stack.getContext().get(key.toString()); |
| if (o != null) { |
| return true; |
| } |
| } |
| |
| // if we still haven't found it, le's search through our chained contexts |
| if (chainedContexts != null) { |
| for (int index = 0; index < chainedContexts.length; index++) { |
| if (chainedContexts[index].containsKey(key)) { |
| return true; |
| } |
| } |
| } |
| |
| // nope, i guess it's really not here |
| return false; |
| } |
| |
| public Object internalGet(String key) { |
| // first, let's check to see if have the requested value |
| if (super.internalContainsKey(key)) { |
| return super.internalGet(key); |
| } |
| |
| // still no luck? let's look against the value stack |
| if (stack != null) { |
| Object object = stack.findValue(key); |
| |
| if (object != null) { |
| return object; |
| } |
| |
| object = stack.getContext().get(key); |
| if (object != null) { |
| return object; |
| } |
| |
| } |
| |
| // finally, if we're chained to other contexts, let's look in them |
| if (chainedContexts != null) { |
| for (int index = 0; index < chainedContexts.length; index++) { |
| if (chainedContexts[index].containsKey(key)) { |
| return chainedContexts[index].internalGet(key); |
| } |
| } |
| } |
| |
| // nope, i guess it's really not here |
| return null; |
| } |
| } |