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+/* java.beans.beancontext.BeanContextMembershipEvent
+ Copyright (C) 1999, 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.beans.beancontext;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Iterator;
+
+/**
+ * Event fired when children are added to or removed from a <code>BeanContext</code>.
+ * Whether they were added or removed depends entirely on which method
+ * of the listener interface was called.
+ *
+ * @author John Keiser
+ * @since 1.2
+ * @see java.beans.beancontext.BeanContextMembershipListener
+ */
+public class BeanContextMembershipEvent extends BeanContextEvent {
+ /**
+ * The children that were added or removed.
+ */
+ protected Collection children;
+
+ /**
+ * Create a new membership event.
+ * @param context the event source.
+ * @param children the children added to or removed from the source.
+ */
+ public BeanContextMembershipEvent(BeanContext context, Collection children) {
+ super(context);
+ this.children = children;
+ }
+
+ /**
+ * Create a new membership event.
+ * @param context the event source.
+ * @param children the children added to or removed from the source.
+ */
+ public BeanContextMembershipEvent(BeanContext context, Object[] children) {
+ super(context);
+ this.children = Arrays.asList(children);
+ }
+
+ /**
+ * The number of children removed or added.
+ * @return the number of children removed or added.
+ */
+ public int size() {
+ return children.size();
+ }
+
+ /**
+ * An iterator that will step through all the children.
+ * @return an iterator over all the children.
+ */
+ public Iterator iterator() {
+ return children.iterator();
+ }
+
+ /**
+ * An array of the children.
+ * @return an array of the children.
+ */
+ public Object[] toArray() {
+ return children.toArray();
+ }
+
+ /**
+ * Tell whether the <code>Object</code> is one of the children added or removed.
+ * @param child the child to check.
+ * @return whether the <code>Object</code> is added or removed.
+ */
+ public boolean contains(Object child) {
+ return children.contains(child);
+ }
+}