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.


              cbcc.addPropertyChangeListener("beanContext", childPCL);
              cbcc.addVetoableChangeListener("beanContext", childVCL);
    }


          Visibility v = getChildVisibility(targetChild);


          if (v != null) {
              if (okToUseGui)
                  v.okToUseGui();
              else
                  v.dontUseGui();
          }


          if (getChildSerializable(targetChild) != null) serializable++;


          childJustAddedHook(targetChild, bcsc);


    if (bccp != null) {
              v = getChildVisibility(bccp);


              if (v != null) {
                  if (okToUseGui)
                      v.okToUseGui();
                  else
                      v.dontUseGui();
              }


        if (getChildSerializable(bccp) != null) serializable++;


              childJustAddedHook(bccp, pbcsc);

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      okToUseGui = false;


      // lets also tell the Children that can that they may not use their GUI's
      synchronized(children) {
          for (Iterator i = children.keySet().iterator(); i.hasNext();) {
        Visibility v = getChildVisibility(i.next());


        if (v != null) v.dontUseGui();
         }
      }
  }
    }

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      okToUseGui = true;


      // lets also tell the Children that can that they may use their GUI's
      synchronized(children) {
          for (Iterator i = children.keySet().iterator(); i.hasNext();) {
        Visibility v = getChildVisibility(i.next());


        if (v != null) v.okToUseGui();
          }
      }
  }
    }

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                        "beans.30", targetChild, e.getMessage())); //$NON-NLS-1$
            }


            // If child implements Visibility,
            // set an appropriate type of ability to render GUI
            Visibility vis = getChildVisibility(targetChild);


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


            // Check if this child implements Serializable and increase
            // the number of serializable children of the BeanContext

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        // Command this BeanContext and its children not to use GUI
        this.okToUseGui = false;


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


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

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        // 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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            okToUseGui = false;


            // lets also tell the Children that can that they may not use their GUI's
            synchronized(children) {
                for (Iterator i = children.keySet().iterator(); i.hasNext();) {
                    Visibility v = getChildVisibility(i.next());


                    if (v != null) v.dontUseGui();
               }
            }
        }
    }

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            okToUseGui = true;


            // lets also tell the Children that can that they may use their GUI's
            synchronized(children) {
                for (Iterator i = children.keySet().iterator(); i.hasNext();) {
                    Visibility v = getChildVisibility(i.next());


                    if (v != null) v.okToUseGui();
                }
            }
        }
    }

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                    cbcc.addPropertyChangeListener("beanContext", childPCL);
                    cbcc.addVetoableChangeListener("beanContext", childVCL);
                }


                Visibility v = getChildVisibility(targetChild);


                if (v != null) {
                    if (okToUseGui)
                        v.okToUseGui();
                    else
                        v.dontUseGui();
                }


                if (getChildSerializable(targetChild) != null) serializable++;


                childJustAddedHook(targetChild, bcsc);


                if (bccp != null) {
                    v = getChildVisibility(bccp);


                    if (v != null) {
                        if (okToUseGui)
                            v.okToUseGui();
                        else
                            v.dontUseGui();
                    }


                    if (getChildSerializable(bccp) != null) serializable++;


                    childJustAddedHook(bccp, pbcsc);

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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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