136 lines
4.5 KiB
Java
136 lines
4.5 KiB
Java
/*
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* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.beans.beancontext;
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import java.util.EventObject;
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import java.beans.beancontext.BeanContext;
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import java.beans.beancontext.BeanContextEvent;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Iterator;
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/**
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* A <code>BeanContextMembershipEvent</code> encapsulates
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* the list of children added to, or removed from,
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* the membership of a particular <code>BeanContext</code>.
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* An instance of this event is fired whenever a successful
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* add(), remove(), retainAll(), removeAll(), or clear() is
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* invoked on a given <code>BeanContext</code> instance.
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* Objects interested in receiving events of this type must
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* implement the <code>BeanContextMembershipListener</code>
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* interface, and must register their intent via the
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* <code>BeanContext</code>'s
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* <code>addBeanContextMembershipListener(BeanContextMembershipListener bcml)
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* </code> method.
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*
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* @author Laurence P. G. Cable
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* @since 1.2
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* @see java.beans.beancontext.BeanContext
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* @see java.beans.beancontext.BeanContextEvent
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* @see java.beans.beancontext.BeanContextMembershipListener
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*/
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public class BeanContextMembershipEvent extends BeanContextEvent {
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private static final long serialVersionUID = 3499346510334590959L;
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/**
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* Contruct a BeanContextMembershipEvent
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*
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* @param bc The BeanContext source
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* @param changes The Children affected
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* @throws NullPointerException if <CODE>changes</CODE> is <CODE>null</CODE>
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*/
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@SuppressWarnings("rawtypes")
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public BeanContextMembershipEvent(BeanContext bc, Collection changes) {
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super(bc);
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if (changes == null) throw new NullPointerException(
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"BeanContextMembershipEvent constructor: changes is null.");
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children = changes;
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}
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/**
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* Contruct a BeanContextMembershipEvent
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*
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* @param bc The BeanContext source
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* @param changes The Children effected
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* @exception NullPointerException if changes associated with this
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* event are null.
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*/
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public BeanContextMembershipEvent(BeanContext bc, Object[] changes) {
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super(bc);
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if (changes == null) throw new NullPointerException(
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"BeanContextMembershipEvent: changes is null.");
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children = Arrays.asList(changes);
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}
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/**
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* Gets the number of children affected by the notification.
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* @return the number of children affected by the notification
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*/
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public int size() { return children.size(); }
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/**
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* Is the child specified affected by the event?
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* @return <code>true</code> if affected, <code>false</code>
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* if not
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* @param child the object to check for being affected
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*/
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public boolean contains(Object child) {
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return children.contains(child);
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}
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/**
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* Gets the array of children affected by this event.
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* @return the array of children affected
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*/
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public Object[] toArray() { return children.toArray(); }
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/**
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* Gets the array of children affected by this event.
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* @return the array of children effected
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*/
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@SuppressWarnings("rawtypes")
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public Iterator iterator() { return children.iterator(); }
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/*
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* fields
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*/
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/**
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* The list of children affected by this
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* event notification.
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*/
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@SuppressWarnings("rawtypes")
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protected Collection children;
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}
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