Examples of java.beans.Visibility

java.beans.Visibility
Under some circumstances a bean may be run on servers where a GUI is not available. This interface can be used to query a bean to determine whether it absolutely needs a gui, and to advise the bean whether a GUI is available.
This interface is for expert developers, and is not needed for normal simple beans. To avoid confusing end-users we avoid using getXXX setXXX design patterns for these methods.

        // We may check it by trying to cast each child to Visibility
        // and see it needs GUI.
        // A child definitely needs GUI if it implements Component
        for (Iterator it = iterator(); it.hasNext();) {
            Object next = it.next();
            Visibility vis = getChildVisibility(next);


            if (vis != null) {
                if (vis.needsGui()) {
                    return true;
                }
            }


            if (next instanceof java.awt.Component) {

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        // Notify this BeanContext and its children that it's OK now to use GUI
        this.okToUseGui = true;


        for (Iterator it = iterator(); it.hasNext();) {
            Object next = it.next();
            Visibility vis = getChildVisibility(next);


            if (vis != null) {
                vis.okToUseGui();
            }
        }
    }

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            Object childs[] = copyChildren();
            for (int i = 0; i < childs.length; i++) {
                if (childs[i] instanceof Component) {
                    return true;
                }
                Visibility v = getChildVisibility(childs[i]);
                if (v != null && v.needsGui()) {
                    return true;
                }
            }
            return false;
        } finally {

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              "associate itself with " +
              "this context.", e);
    }
      if (targetChild instanceof Visibility)
        {
    Visibility visibleChild = (Visibility) targetChild;
    if (okToUseGui)
      visibleChild.okToUseGui();
    else
      visibleChild.dontUseGui();
        }
      childJustAddedHook(targetChild, child);
    }
  fireChildrenAdded(new BeanContextMembershipEvent(this,
               new Object[]{ targetChild }));

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Related Classes of java.beans.Visibility

org.apache.harmony.beans.tests.java.beans.beancontext.BeanContextSupportTest

java.beans.beancontext.BeanContextSupport

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