Java by API/java.beans.beancontext/BeanContextSupport
Версия от 20:43, 31 мая 2010; (обсуждение)
BeanContextSupport: addBeanContextMembershipListener(BeanContextMembershipListener bcml)
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/*
* Copyright (c) 1995 - 2008 Sun Microsystems, Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * - Neither the name of Sun Microsystems nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
import java.beans.beancontext.BeanContextChildSupport; import java.beans.beancontext.BeanContextMembershipEvent; import java.beans.beancontext.BeanContextMembershipListener; import java.beans.beancontext.BeanContextSupport; /**
* A simple test program to illustrate delivery of the * BeanContextMembershipEvent. */
public class MembershipTest {
public static void main(String[] args) { BeanContextSupport context = new BeanContextSupport(); // the context MyMembershipListener listener = new MyMembershipListener(); BeanContextChildSupport bean = new BeanContextChildSupport(); // a JavaBean context.addBeanContextMembershipListener(listener); // now listening! context.add(bean); context.remove(bean); }
} /**
* A custom implementation of the BeanContextMembershipListener interface. */
class MyMembershipListener implements BeanContextMembershipListener {
public void childrenAdded(BeanContextMembershipEvent bcme) { System.out.println("Another bean has been added to the context."); } public void childrenRemoved(BeanContextMembershipEvent bcme) { System.out.println("A bean has been removed from the context."); }
}
</source>
BeanContextSupport: contains(Object o)
<source lang="java">
/*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * -Redistribution of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * -Redistribution in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of Sun Microsystems, Inc. or the names of contributors may * be used to endorse or promote products derived from this software without * specific prior written permission. * * This software is provided "AS IS," without a warranty of any kind. ALL * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. * * You acknowledge that this software is not designed, licensed or intended * for use in the design, construction, operation or maintenance of any * nuclear facility. */
import java.beans.beancontext.BeanContextChildSupport; import java.beans.beancontext.BeanContextSupport; /**
* A test program that adds a bean to a beancontext, and reports on various * aspects of the context"s membership state. This program also shows that a * bean"s getBeanContext() method can be called to get a reference to its * enclosing context. */
public class Example1 {
private static BeanContextSupport context = new BeanContextSupport(); // The // BeanContext private static BeanContextChildSupport bean = new BeanContextChildSupport(); // The // JavaBean public static void main(String[] args) { report(); // Add the bean to the context System.out.println("Adding bean to context..."); context.add(bean); report(); } private static void report() { // Print out a report of the context"s membership state. // Is the context empty? System.out.println("Is the context empty? " + context.isEmpty()); // Has the context been set for the child bean? boolean result = (bean.getBeanContext() != null); System.out.println("Does the bean have a context yet? " + result); // Number of children in the context System.out.println("Number of children in the context: " + context.size()); // Is the specific bean a member of the context? System.out.println("Is the bean a member of the context? " + context.contains(bean)); // Equality test if (bean.getBeanContext() != null) { boolean isEqual = (bean.getBeanContext() == context); // true means // both // references // point to // the same // object System.out.println("Contexts are the same? " + isEqual); } }
}
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