/*
* Copyright 2004, 2005, 2006 Odysseus Software GmbH
*
* 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 de.odysseus.calyxo.control.base;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import de.odysseus.calyxo.base.ModuleGroup;
import de.odysseus.calyxo.base.ModuleContext;
import de.odysseus.calyxo.base.ModuleSelector;
import de.odysseus.calyxo.base.ModuleSupport;
/**
* Module group to collect instances of {@link de.odysseus.calyxo.control.base.ControlModuleContext}.
*
* @author Christoph Beck
*/
public final class ControlModuleGroup extends ModuleGroup {
private static final String MODULE_CONTAINER_KEY = "de.odysseus.calyxo.control.module.container";
private static final String MODULE_CONTEXT_KEY = "de.odysseus.calyxo.control.module.context";
/**
* Loookup module container instance
*/
public static final ControlModuleGroup getInstance(ServletContext context) {
ControlModuleGroup result = (ControlModuleGroup)context.getAttribute(MODULE_CONTAINER_KEY);
if (result == null) {
result = new ControlModuleGroup(ModuleSupport.getInstance(context));
context.setAttribute(MODULE_CONTAINER_KEY, result);
}
return result;
}
private ControlModuleGroup(ModuleSupport support) {
super(support);
}
protected ModuleSelector extend(final ModuleSelector delegate) {
return new ModuleSelector() {
public ModuleContext getModuleContext(HttpServletRequest request) {
ModuleContext result = delegate.getModuleContext(request);
if (result == null) {
result = (ModuleContext)request.getAttribute(MODULE_CONTEXT_KEY);
}
return result;
}
};
}
public void setControlModuleContext(HttpServletRequest request, ControlModuleContext module) {
request.setAttribute(MODULE_CONTEXT_KEY, module);
}
public ControlModuleContext getControlModuleContext(String name) {
return (ControlModuleContext)getModuleContext(name);
}
public void add(ControlModuleContext context) throws ServletException {
super.add(context);
}
public void remove(ControlModuleContext context) {
super.remove(context);
}
}