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1   /*
2    * Copyright 2004-2005 the original author or authors.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5    * use this file except in compliance with the License. You may obtain a copy of
6    * the License at
7    * 
8    * http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations under
14   * the License.
15   */
16  package net.sf.morph.reflect.reflectors;
17  
18  import javax.servlet.jsp.PageContext;
19  
20  import net.sf.morph.reflect.ReflectionException;
21  
22  /**
23   * Exposes page context attributes.
24   * 
25   * @author Matt Sgarlata
26   * @since Dec 4, 2004
27   */
28  public class PageContextAttributeReflector extends
29  	BaseServletReflector {
30  
31  	private static final Class[] REFLECTABLE_TYPES = new Class[] { PageContext.class };
32  
33  	protected PageContext getPageContext(Object bean) {
34  		return (PageContext) bean;
35  	}
36  
37  	protected String[] getPropertyNamesImpl(Object bean) throws Exception {
38  		return enumerationToStringArray(getPageContext(bean).getAttributeNamesInScope(
39  			PageContext.PAGE_SCOPE));
40  	}
41  
42  	protected Object getImpl(Object bean, String propertyName) throws Exception {
43  		return getPageContext(bean).getAttribute(propertyName);
44  	}
45  
46  	protected void setImpl(Object bean, String propertyName, Object value)
47  		throws Exception {
48  		if (value == null) {
49  			throw new ReflectionException("Cannot set null for property '" + propertyName + "' because null values are not allowed for " + PageContext.class.getName() + " attributes");
50  		}
51  		getPageContext(bean).setAttribute(propertyName, value);
52  	}
53  
54  	public Class[] getReflectableClassesImpl() {
55  		return REFLECTABLE_TYPES;
56  	}
57  
58  }