Java by API/java.beans.beancontext/BeanContextSupport

BeanContextSupport: addBeanContextMembershipListener(BeanContextMembershipListener bcml)

  

/*
 * 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.");
  }
}

BeanContextSupport: contains(Object o)

  
/*
 * 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);
    }
  }
}