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Java » Development Class » Java BeansScreenshots 
JavaBean: BeanContextSupport
JavaBean: BeanContextSupport
   
/*
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
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 *
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 *  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.
 *
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 * 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
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 * 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.
    System.out.println("=============================================");

    // 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);
    }
    System.out.println("=============================================");
  }
}

           
         
    
    
  
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