Java by API/java.beans.beancontext/BeanContextChildSupport
BeanContextChildSupport.getBeanContext()
<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); } }
}
</source>