/*
* $Id: InvocationSessionStore.java 651946 2008-04-27 13:41:38Z apetrelli $
*
* 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.struts2.util;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.util.ValueStack;
/**
* InvocationSessionStore
*
*/
public class InvocationSessionStore {
private static final String INVOCATION_MAP_KEY = "org.apache.struts2.util.InvocationSessionStore.invocationMap";
private InvocationSessionStore() {
}
/**
* Checks the Map in the Session for the key and the token. If the
* ActionInvocation is saved in the Session, the ValueStack from the
* ActionProxy associated with the ActionInvocation is set into the
* ActionContext and the ActionInvocation is returned.
*
* @param key the name the DefaultActionInvocation and ActionContext were saved as
* @return the DefaultActionInvocation saved using the key, or null if none was found
*/
public static ActionInvocation loadInvocation(String key, String token) {
InvocationContext invocationContext = (InvocationContext) getInvocationMap().get(key);
if ((invocationContext == null) || !invocationContext.token.equals(token)) {
return null;
}
ValueStack stack = invocationContext.invocation.getStack();
ActionContext.getContext().setValueStack(stack);
return invocationContext.invocation;
}
/**
* Stores the DefaultActionInvocation and ActionContext into the Session using the provided key for loading later using
* {@link #loadInvocation}
*
* @param key
* @param invocation
*/
public static void storeInvocation(String key, String token, ActionInvocation invocation) {
InvocationContext invocationContext = new InvocationContext(invocation, token);
Map invocationMap = getInvocationMap();
invocationMap.put(key, invocationContext);
setInvocationMap(invocationMap);
}
static void setInvocationMap(Map invocationMap) {
Map session = ActionContext.getContext().getSession();
if (session == null) {
throw new IllegalStateException("Unable to access the session.");
}
session.put(INVOCATION_MAP_KEY, invocationMap);
}
static Map getInvocationMap() {
Map session = ActionContext.getContext().getSession();
if (session == null) {
throw new IllegalStateException("Unable to access the session.");
}
Map invocationMap = (Map) session.get(INVOCATION_MAP_KEY);
if (invocationMap == null) {
invocationMap = new HashMap();
setInvocationMap(invocationMap);
}
return invocationMap;
}
private static class InvocationContext implements Serializable {
private static final long serialVersionUID = -286697666275777888L;
ActionInvocation invocation;
String token;
public InvocationContext(ActionInvocation invocation, String token) {
this.invocation = invocation;
this.token = token;
}
}
}
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