Java by API/java.beans.beancontext/BeanContextChildSupport

BeanContextChildSupport.getBeanContext()

 

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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);
    }
  }
}