/*
* Copyright (c) 2001-2007, Inversoft Inc., All Rights Reserved
*
* 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.primeframework.mvc.message.scope;
import javax.servlet.ServletContext;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.primeframework.mvc.message.Message;
import com.google.inject.Inject;
/**
* This is the message scope which fetches and stores values in the ServletContext. The values are stored in the servlet
* context using a variety of different keys.
*
* @author Brian Pontarelli
*/
@SuppressWarnings("unchecked")
public class ApplicationScope implements Scope {
public static final String KEY = "primeMessages";
private final ServletContext context;
@Inject
public ApplicationScope(ServletContext context) {
this.context = context;
}
@Override
public void add(Message message) {
List<Message> messages = (List<Message>) context.getAttribute(KEY);
if (messages == null) {
messages = new ArrayList<Message>();
context.setAttribute(KEY, messages);
}
messages.add(message);
}
@Override
public void addAll(Collection<Message> messages) {
List<Message> scopeMessages = (List<Message>) context.getAttribute(KEY);
if (scopeMessages == null) {
scopeMessages = new ArrayList<Message>();
context.setAttribute(KEY, scopeMessages);
}
scopeMessages.addAll(messages);
}
@Override
public List<Message> get() {
List<Message> messages = (List<Message>) context.getAttribute(KEY);
if (messages != null) {
return messages;
}
return Collections.emptyList();
}
@Override
public void clear() {
context.removeAttribute(KEY);
}
}