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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 java.util.ArrayList;
19  import java.util.Collection;
20  import java.util.Iterator;
21  
22  import net.sf.morph.reflect.ContainerReflector;
23  import net.sf.morph.reflect.GrowableContainerReflector;
24  import net.sf.morph.reflect.InstantiatingReflector;
25  import net.sf.morph.reflect.SizableReflector;
26  
27  /**
28   * A reflector for {@link java.util.Collection}s.
29   * 
30   * @author Matt Sgarlata
31   * @since Nov 20, 2004
32   */
33  public class CollectionReflector extends BaseContainerReflector implements ContainerReflector, SizableReflector, InstantiatingReflector, GrowableContainerReflector {
34  
35  	private static final Class[] REFLECTABLE_TYPES = new Class[] {
36  		Collection.class
37  	};
38  	
39  	protected Collection getCollection(Object container) {
40  		return (Collection) container;
41  	}
42  	
43  	public Class[] getReflectableClassesImpl() {
44  		return REFLECTABLE_TYPES;
45  	}
46  
47  	/**
48  	 * TODO JDK 1.5 (generics) compatibility
49  	 */
50  	protected Class getContainedTypeImpl(Class clazz) throws Exception {
51  		return Object.class;
52  	}
53  
54  	protected int getSizeImpl(Object container) throws Exception {
55  		return getCollection(container).size();
56  	}
57  
58  	protected Iterator getIteratorImpl(Object container) throws Exception {
59  		return getCollection(container).iterator();
60  	}
61  
62  	protected Object newInstanceImpl(Class clazz, Object parameters) throws Exception {
63  		return clazz == Collection.class ? new ArrayList() : super.newInstanceImpl(clazz, parameters);
64  	}
65  
66  	protected boolean addImpl(Object container, Object value) {
67  		return ((Collection) container).add(value);
68  	}
69  
70  }