/*
* JBoss, Home of Professional Open Source
* Copyright 2013, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.richfaces.util;
import java.util.HashMap;
import java.util.Map;
import javax.faces.context.FacesContext;
/**
* @author Nick Belaevski
* @since 4.0
*/
public final class RequestStateManager {
private static final String CONTEXT_ATTRIBUTE_NAME = RequestStateManager.class.getName();
private RequestStateManager() {
}
// TODO remove this stuff
public static enum BooleanRequestStateVariable {
LegacyResourceRequest("org.richfaces.LEGACY_RESOURCE_REQUEST"),
ResourceRequest("org.richfaces.RESOURCE_REQUEST");
private String attributeName;
private BooleanRequestStateVariable(String attributeName) {
this.attributeName = attributeName;
}
public Boolean get(FacesContext context) {
return (Boolean) RequestStateManager.get(context, this.attributeName);
}
public void set(FacesContext context, Boolean value) {
RequestStateManager.set(context, this.attributeName, value);
}
}
@SuppressWarnings("unchecked")
private static Map<String, Object> getStateMap(FacesContext context, boolean create) {
Map<Object, Object> attributesMap = context.getAttributes();
Map<String, Object> result = (Map<String, Object>) attributesMap.get(CONTEXT_ATTRIBUTE_NAME);
if (create && (result == null)) {
result = new HashMap<String, Object>();
attributesMap.put(CONTEXT_ATTRIBUTE_NAME, result);
}
return result;
}
public static boolean containsKey(FacesContext context, String key) {
if (context == null) {
throw new NullPointerException("context");
}
if (key == null) {
throw new NullPointerException("key");
}
Map<String, Object> stateMap = getStateMap(context, false);
if (stateMap != null) {
return stateMap.containsKey(key);
} else {
return false;
}
}
public static Object get(FacesContext context, String key) {
if (context == null) {
throw new NullPointerException("context");
}
if (key == null) {
throw new NullPointerException("key");
}
Map<String, Object> stateMap = getStateMap(context, false);
if (stateMap != null) {
return stateMap.get(key);
}
return null;
}
public static void set(FacesContext context, String key, Object value) {
if (context == null) {
throw new NullPointerException("context");
}
if (key == null) {
throw new NullPointerException("key");
}
if (value != null) {
Map<String, Object> stateMap = getStateMap(context, true);
stateMap.put(key, value);
} else {
Map<String, Object> stateMap = getStateMap(context, false);
if (stateMap != null) {
stateMap.remove(key);
}
}
}
}