?? showcontext.java
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//file: ShowContext.javapackage magicbeans;import javax.swing.*;import java.beans.beancontext.*;import java.util.*;public class ShowContext extends JTabbedPane implements BeanContextProxy { BeanContext context; BeanContextServices services; JList servicesList = new JList(), beansList = new JList( ); public ShowContext( ) { addTab( "Beans", new JScrollPane( beansList ) ); addTab( "Services", new JScrollPane( servicesList ) ); } private BeanContextChildSupport beanContextChild = new BeanContextChildSupport( ) { public void initializeBeanContextResources( ) { context= getBeanContext( ); try { services = (BeanContextServices)context; } catch (ClassCastException ex){/*No BeanContextServices*/} updateBeanList( ); updateServicesList( ); context.addBeanContextMembershipListener( new BeanContextMembershipListener( ) { public void childrenAdded( BeanContextMembershipEvent e){ updateBeanList( ); } public void childrenRemoved( BeanContextMembershipEvent e){ updateBeanList( ); } } ); services.addBeanContextServicesListener( new BeanContextServicesListener( ) { public void serviceAvailable( BeanContextServiceAvailableEvent e ) { updateServicesList( ); } public void serviceRevoked( BeanContextServiceRevokedEvent e ) { updateServicesList( ); } } ); } }; void updateServicesList( ) { if ( services == null ) return; Iterator it = services.getCurrentServiceClasses( ); Vector v = new Vector( ); while( it.hasNext( ) ) v.addElement( it.next( ) ); servicesList.setListData( v ); } void updateBeanList( ) { Iterator it = context.iterator( ); Vector v = new Vector( ); while( it.hasNext( ) ) v.addElement( it.next( ) ); beansList.setListData( v ); } public BeanContextChild getBeanContextProxy( ) { return beanContextChild; }}
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