| /* |
| * Copyright 2004-2005 the original author or authors. |
| * |
| * 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.codehaus.groovy.grails.web.metaclass; |
| |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import javax.servlet.http.HttpSession; |
| import java.util.*; |
| /** |
| * A dynamic property that adds a "session" map to a controller for accessing the Http Session |
| * |
| * @author Graeme Rocher |
| * @since Oct 24, 2005 |
| */ |
| public class GetSessionDynamicProperty extends AbstractDynamicControllerProperty { |
| |
| public static final String PROPERTY_NAME = "session"; |
| private HttpSessionMap sessionMap; |
| |
| public GetSessionDynamicProperty(HttpServletRequest request, HttpServletResponse response) { |
| super(PROPERTY_NAME, request, response); |
| this.sessionMap = new HttpSessionMap(); |
| } |
| |
| public Object get(Object object) { |
| return this.sessionMap; |
| } |
| |
| public void set(Object object, Object newValue) { |
| throw new UnsupportedOperationException("Property '" + PROPERTY_NAME + "' of class '"+object.getClass()+"' is read-only!" ); |
| } |
| |
| /** |
| * Wraps the HttpSessoin in a map |
| * |
| * @author Graeme Rocher |
| * @since Oct 24, 2005 |
| */ |
| private class HttpSessionMap implements Map { |
| |
| HttpSession session = null; |
| |
| public int size() { |
| if(session == null) |
| return 0; |
| // count as there is no way to access size from the session directly |
| int count = 0; |
| for(Enumeration e = session.getAttributeNames();e.hasMoreElements();count++) {} |
| return count; |
| } |
| |
| public boolean isEmpty() { |
| if(session == null) |
| return true; |
| |
| Enumeration e = session.getAttributeNames(); |
| return !e.hasMoreElements(); |
| } |
| |
| public boolean containsKey(Object key) { |
| if(!(key instanceof String)) |
| throw new IllegalArgumentException("The 'session' property key '"+key+"' must be a string value"); |
| |
| if(session == null || session.isNew()) |
| return false; |
| |
| Object attr = session.getAttribute((String)key); |
| if(attr == null) |
| return false; |
| else |
| return true; |
| } |
| |
| public boolean containsValue(Object value) { |
| if(session == null) |
| return false; |
| |
| for(Enumeration e = session.getAttributeNames();e.hasMoreElements();) { |
| String currentKey = (String)e.nextElement(); |
| Object current = session.getAttribute(currentKey); |
| if(current.equals(value)) |
| return true; |
| } |
| return false; |
| } |
| |
| public Object get(Object key) { |
| if(!(key instanceof String)) |
| throw new IllegalArgumentException("The 'session' property key '"+key+"' must be a string value"); |
| |
| |
| if(session == null) |
| session = request.getSession(false); |
| if(session == null) |
| return null; |
| |
| return session.getAttribute((String)key); |
| } |
| |
| public Object put(Object key, Object value) { |
| if(!(key instanceof String)) |
| throw new IllegalArgumentException("The 'session' property key '"+key+"' must be a string value"); |
| |
| if(session == null) |
| session = request.getSession(); |
| |
| session.setAttribute((String)key, value); |
| return value; |
| } |
| |
| public Object remove(Object key) { |
| if(!(key instanceof String)) |
| throw new IllegalArgumentException("The 'session' property key '"+key+"' must be a string value"); |
| |
| if(session == null) |
| return null; |
| |
| Object value = session.getAttribute((String)key); |
| if(value != null) |
| session.removeAttribute((String)key); |
| |
| return value; |
| } |
| |
| public void putAll(Map sessionMap) { |
| for (Iterator i = sessionMap.keySet().iterator(); i.hasNext();) { |
| String currentKey = (String) i.next(); |
| put(currentKey,sessionMap.get(currentKey)); |
| } |
| } |
| |
| public void clear() { |
| if(session == null) |
| return; |
| |
| for(Enumeration e = session.getAttributeNames();e.hasMoreElements();) { |
| String current = (String)e.nextElement(); |
| session.removeAttribute(current); |
| } |
| } |
| |
| public Set keySet() { |
| if(session == null || session.isNew()) |
| return Collections.EMPTY_SET; |
| |
| Set keySet = new HashSet(); |
| for(Enumeration e = session.getAttributeNames();e.hasMoreElements();) { |
| String current = (String)e.nextElement(); |
| keySet.add(current); |
| } |
| return keySet; |
| } |
| |
| public Collection values() { |
| throw new UnsupportedOperationException("Method 'values()' is not support by session Map." ); |
| } |
| |
| public Set entrySet() { |
| throw new UnsupportedOperationException("Method 'entrySet()' is not support by session Map." ); |
| } |
| } |
| } |