gistfile1.java

   public void encodeBegin( FacesContext context ) throws IOException {

      super.encodeBegin( context );

      // Without this 'if' statement everything gets rendered again on every partial submit
      if( getChildCount() == 0 ) {
         processTagAttributes();

         if( fieldSetContainerList != null && !fieldSetContainerList.isEmpty() ) {

            // Iterate over field containers to generate rows
            for( List <DynamicFieldContainer> dynamicFieldContainerList : fieldSetContainerList ) {

               // This is the panelGroup that wraps a single row.
               HtmlPanelGroup rowPanelGroup = new HtmlPanelGroup();
               rowPanelGroup.setStyleClass( "fieldRow" );

               // Iterate over collection of fields to populate row with fields
               for( DynamicFieldContainer dynamicFieldContainer : dynamicFieldContainerList ) {

                  ScreenFieldDcl screenFieldDcl = dynamicFieldContainer.getScreenFieldDcl();
                  IFieldDataDcl fieldDataDcl = dynamicFieldContainer.getFieldDataDcl();
                  if( !"Yes".equals( screenFieldDcl.getHidden() ) ) {

                     if( "Line".equals( screenFieldDcl.getDataType() ) ) {
                        HtmlPanelGroup linePanelGroup = new HtmlPanelGroup();
                        linePanelGroup.setStyleClass( "fieldWrapper lineFieldWrapper" );
                        rowPanelGroup.getChildren().add( linePanelGroup );
                     }
                     else if( "Blank".equals( screenFieldDcl.getDataType() ) ) {
                        HtmlPanelGroup blankPanelGroup = new HtmlPanelGroup();
                        blankPanelGroup.setStyleClass( "fieldWrapper" );
                        rowPanelGroup.getChildren().add( blankPanelGroup );
                     }
                     else if( "Text".equals( screenFieldDcl.getDataType() ) ) {
                        UIComponent textField = generateTextField( screenFieldDcl, fieldDataDcl );
                        rowPanelGroup.getChildren().add( textField );
                     }

                     // Add current row to this components children
                     this.getChildren().add( rowPanelGroup );
                  }
               }
            }
         }
      }
   }

   private UIComponent generateTextField( ScreenFieldDcl screenFieldDcl, IFieldDataDcl fieldDataDcl ) {

      // Setup Field Wrapper
      HtmlPanelGroup fieldWrapper = new HtmlPanelGroup();
      fieldWrapper.setStyleClass( "fieldWrapper" );

      // This is the field label.
      HtmlOutputLabel fieldLabel = new HtmlOutputLabel();
      fieldLabel.setValue( screenFieldDcl.getDisplay() + ":" );
      fieldWrapper.getChildren().add( fieldLabel );

      // Setup panel groups that wrap text input
      HtmlPanelGroup entryWrapperPanelGroup = new HtmlPanelGroup();
      entryWrapperPanelGroup.setStyleClass( "entryWrapper" );
      HtmlPanelGroup textBoxWrapperPanelGroup = new HtmlPanelGroup();
      textBoxWrapperPanelGroup.setStyleClass( "textBoxWrapper" );
      entryWrapperPanelGroup.getChildren().add( textBoxWrapperPanelGroup );

      // Retrieve context for retrieving values
      FacesContext facesContext = FacesContext.getCurrentInstance();
      ELContext elContext = facesContext.getELContext();

      HtmlInputText inputText = new HtmlInputText();
      inputText.setTitle( screenFieldDcl.getDisplay() );

      // Setup value binding
      ExpressionFactoryImpl expressionFactory = new ExpressionFactoryImpl();
      ValueExpression valueExpression = expressionFactory.createValueExpression( fieldDataDcl, Object.class );
      inputText.setValueExpression( "value", valueExpression );

      // Set initial value of input
      inputText.setValue( fieldDataDcl.getValue() );

      // Setup max length
      if( !StringHelperUtl.isEmpty( screenFieldDcl.getLength() ) ) {
         inputText.setMaxlength( TypeHelperUtl.getInteger( screenFieldDcl.getLength() ) );
      }

      // Setup converter
      Converter converter = ( Converter )facesContext.getApplication().getELResolver().getValue( elContext, null, "stringConverter" );
      inputText.setConverter( converter );

      // Setup value change listener
      if( backingBean != null && !StringHelperUtl.isEmpty( beanListenerName ) ) {
         Class[] actionListenerParameterTypes = new Class[]{ ValueChangeEvent.class };
         MethodExpression methodExpression = expressionFactory.createMethodExpression( elContext, "#{" + backingBean + "." + beanListenerName + "}", null, actionListenerParameterTypes );
         MethodExpressionValueChangeListener methodExpressionValueChangeListener = new MethodExpressionValueChangeListener( methodExpression );
         inputText.addValueChangeListener( methodExpressionValueChangeListener );
      }

      inputText.setPartialSubmit( true );

      // Insert input text into innermost wrapper
      textBoxWrapperPanelGroup.getChildren().add( inputText );

      // Insert input wrapper into field wrapper
      fieldWrapper.getChildren().add( entryWrapperPanelGroup );
      return fieldWrapper;
   }