public void applyAttachedObject(FacesContext context, UIComponent parent) {
FaceletContext ctx =
(FaceletContext) context.getAttributes().get(FaceletContext.FACELET_CONTEXT_KEY);
// cast to a ValueHolder
ValueHolder vh = (ValueHolder) parent;
ValueExpression ve = null;
Converter c = null;
if (this.binding != null) {
ve = this.binding.getValueExpression(ctx, Converter.class);
c = (Converter) ve.getValue(ctx);
}
if (c == null) {
c = this.createConverter(ctx);
if (ve != null) {
ve.setValue(ctx, c);
}
}
if (c == null) {
throw new TagException(this.tag, "No Converter was created");
}
this.setAttributes(ctx, c);
vh.setConverter(c);
Object lv = vh.getLocalValue();
FacesContext faces = ctx.getFacesContext();
if (lv instanceof String) {
vh.setValue(c.getAsObject(faces, parent, (String) lv));
}
}
/**
* populate the argument component with values, being sensitive to the possible multi-nature of
* the values, and to the type of the values.
*
* @param context the <code>FacesContext</code> for the current request
* @param component the <code>UIComponent</code> to populate
* @param componentType the component type
* @param value the value
* @param valueType the value type
*/
private void populateComponentWithValue(
FacesContext context,
UIComponent component,
String componentType,
String value,
String valueType) {
Application application = context.getApplication();
Converter converter = null;
// if we need a converter, and can have a converter
if (!"java.lang.String".equals(valueType) && component instanceof ValueHolder) {
// if so create it,
try {
converter = application.createConverter(CarStore.loadClass(valueType, this));
// add it to our component,
((ValueHolder) component).setConverter(converter);
} catch (ClassNotFoundException cne) {
FacesMessage errMsg = MessageFactory.getMessage(CONVERTER_ERROR_MESSAGE_ID, valueType);
throw new IllegalStateException(errMsg.getSummary());
}
}
// if this component is a SelectOne or SelectMany, take special action
if (isMultiValue(componentType)) {
// create a UISelectItems instance
UISelectItems items = new UISelectItems();
items.setValue(parseStringIntoArrayList(value, converter));
// add it to the component
component.getChildren().add(items);
} else {
// we have a single value
if (null != converter) {
component.getAttributes().put("value", converter.getAsObject(context, component, value));
} else {
component.getAttributes().put("value", value);
}
}
}
public void applyMetadata(FaceletContext ctx, Object instance) {
((ValueHolder) instance)
.setConverter(ctx.getFacesContext().getApplication().createConverter(this.converterId));
}
@SuppressWarnings("deprecation")
public UIComponent processWidget(
UIComponent component,
String elementName,
Map<String, String> attributes,
UIMetawidget metawidget) {
// Actions don't get converters
if (ACTION.equals(elementName)) {
return component;
}
// Recurse into stubs...
if (component instanceof UIStub) {
// ...whose children have the same value binding as us...
//
// (this is important because choice of Converter is based off the attributes Map, and
// if the value binding is different then all bets are off as to the accuracy of the
// attributes)
javax.faces.el.ValueBinding valueBinding = component.getValueBinding("value");
if (valueBinding != null) {
String expressionString = valueBinding.getExpressionString();
List<UIComponent> children = component.getChildren();
for (UIComponent componentChild : children) {
javax.faces.el.ValueBinding childValueBinding = componentChild.getValueBinding("value");
if (childValueBinding == null) {
continue;
}
if (!expressionString.equals(childValueBinding.getExpressionString())) {
continue;
}
// ...and apply the Converter to them
processWidget(componentChild, elementName, attributes, metawidget);
}
}
return component;
}
// Ignore components that cannot have Converters
if (!(component instanceof ValueHolder)) {
return component;
}
// Defer evaluation of EL-based converters, else we will fail trying to store/restore them
// from the ViewState
ValueHolder valueHolder = (ValueHolder) component;
String converterId = attributes.get(FACES_CONVERTER);
if (converterId != null && FacesUtils.isExpression(converterId)) {
FacesContext context = FacesContext.getCurrentInstance();
component.setValueBinding(
"converter", context.getApplication().createValueBinding(converterId));
return component;
}
// Standard Converter
valueHolder.setConverter(getConverter(valueHolder, attributes));
return component;
}
