| 1 | /* java.beans.beancontext.BeanContextMembershipEvent |
| 2 | Copyright (C) 1999, 2004 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GNU Classpath. |
| 5 | |
| 6 | GNU Classpath is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GNU Classpath is distributed in the hope that it will be useful, but |
| 12 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GNU Classpath; see the file COPYING. If not, write to the |
| 18 | Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 19 | 02110-1301 USA. |
| 20 | |
| 21 | Linking this library statically or dynamically with other modules is |
| 22 | making a combined work based on this library. Thus, the terms and |
| 23 | conditions of the GNU General Public License cover the whole |
| 24 | combination. |
| 25 | |
| 26 | As a special exception, the copyright holders of this library give you |
| 27 | permission to link this library with independent modules to produce an |
| 28 | executable, regardless of the license terms of these independent |
| 29 | modules, and to copy and distribute the resulting executable under |
| 30 | terms of your choice, provided that you also meet, for each linked |
| 31 | independent module, the terms and conditions of the license of that |
| 32 | module. An independent module is a module which is not derived from |
| 33 | or based on this library. If you modify this library, you may extend |
| 34 | this exception to your version of the library, but you are not |
| 35 | obligated to do so. If you do not wish to do so, delete this |
| 36 | exception statement from your version. */ |
| 37 | |
| 38 | |
| 39 | package java.beans.beancontext; |
| 40 | |
| 41 | import java.util.Arrays; |
| 42 | import java.util.Collection; |
| 43 | import java.util.Iterator; |
| 44 | |
| 45 | /** |
| 46 | * Event fired when children are added to or removed from a <code>BeanContext</code>. |
| 47 | * Whether they were added or removed depends entirely on which method |
| 48 | * of the listener interface was called. |
| 49 | * |
| 50 | * @author John Keiser |
| 51 | * @since 1.2 |
| 52 | * @see java.beans.beancontext.BeanContextMembershipListener |
| 53 | */ |
| 54 | public class BeanContextMembershipEvent extends BeanContextEvent { |
| 55 | private static final long serialVersionUID = 3499346510334590959L; |
| 56 | |
| 57 | /** |
| 58 | * The children that were added or removed. |
| 59 | */ |
| 60 | protected Collection children; |
| 61 | |
| 62 | /** |
| 63 | * Create a new membership event. |
| 64 | * @param context the event source. |
| 65 | * @param children the children added to or removed from the source. |
| 66 | */ |
| 67 | public BeanContextMembershipEvent(BeanContext context, Collection children) { |
| 68 | super(context); |
| 69 | this.children = children; |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Create a new membership event. |
| 74 | * @param context the event source. |
| 75 | * @param children the children added to or removed from the source. |
| 76 | */ |
| 77 | public BeanContextMembershipEvent(BeanContext context, Object[] children) { |
| 78 | super(context); |
| 79 | this.children = Arrays.asList(children); |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * The number of children removed or added. |
| 84 | * @return the number of children removed or added. |
| 85 | */ |
| 86 | public int size() { |
| 87 | return children.size(); |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * An iterator that will step through all the children. |
| 92 | * @return an iterator over all the children. |
| 93 | */ |
| 94 | public Iterator iterator() { |
| 95 | return children.iterator(); |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * An array of the children. |
| 100 | * @return an array of the children. |
| 101 | */ |
| 102 | public Object[] toArray() { |
| 103 | return children.toArray(); |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Tell whether the <code>Object</code> is one of the children added or removed. |
| 108 | * @param child the child to check. |
| 109 | * @return whether the <code>Object</code> is added or removed. |
| 110 | */ |
| 111 | public boolean contains(Object child) { |
| 112 | return children.contains(child); |
| 113 | } |
| 114 | } |