javax.faces.component
Class UIParameter

java.lang.Object
  javax.faces.component.UIComponent
      javax.faces.component.UIComponentBase
          javax.faces.component.UIParameter

All Implemented Interfaces:

StateHolder

public class UIParameter
extends UIComponentBase

UIParameter is a UIComponent that represents an optionally named configuration parameter for a parent component.

Parent components should retrieve the value of a parameter by calling getValue(). In this way, the parameter value can be set directly on the component (via setValue()), or retrieved indirectly via the value binding expression.

In some scenarios, it is necessary to provide a parameter name, in addition to the parameter value that is accessible via the getValue() method. Renderers that support parameter names on their nested UIParameter child components should document their use of this property.

Field Summary

static String	COMPONENT_FAMILY The standard component family for this component.
static String	COMPONENT_TYPE The standard component type for this component.

Fields inherited from class javax.faces.component.UIComponent

bindings

Constructor Summary

UIParameter()
Create a new UIParameter instance with default property values.

Method Summary

String	getFamily() Return the identifier of the component family to which this component belongs.
String	getName() Return the optional parameter name for this parameter.
Object	getValue() Returns the value property of the UIParameter.
void	restoreState(FacesContext context, Object state) Perform any processing required to restore the state from the entries in the state Object.
Object	saveState(FacesContext context) Gets the state of the instance as a Serializable Object.
void	setName(String name) Set the optional parameter name for this parameter.
void	setValue(Object value) Sets the value property of the\ UIParameter.

Methods inherited from class javax.faces.component.UIComponentBase

addFacesListener, broadcast, decode, encodeBegin, encodeChildren, encodeEnd, findComponent, getAttributes, getChildCount, getChildren, getClientId, getFacesContext, getFacesListeners, getFacet, getFacetCount, getFacets, getFacetsAndChildren, getId, getParent, getRenderer, getRendererType, getRendersChildren, getValueBinding, getValueExpression, invokeOnComponent, isRendered, isTransient, processDecodes, processRestoreState, processSaveState, processUpdates, processValidators, queueEvent, removeFacesListener, restoreAttachedState, saveAttachedState, setId, setParent, setRendered, setRendererType, setTransient, setValueBinding, setValueExpression

Methods inherited from class javax.faces.component.UIComponent

encodeAll, getContainerClientId

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

COMPONENT_TYPE

public static final String COMPONENT_TYPE

The standard component type for this component.

See Also:

Constant Field Values

COMPONENT_FAMILY

public static final String COMPONENT_FAMILY

The standard component family for this component.

See Also:

Constant Field Values

Constructor Detail

UIParameter

public UIParameter()

Create a new UIParameter instance with default property values.

Method Detail

getFamily

public String getFamily()

Description copied from class: UIComponent

Return the identifier of the component family to which this component belongs. This identifier, in conjunction with the value of the rendererType property, may be used to select the appropriate Renderer for this component instance.

Specified by:

getFamily in class UIComponent

getName

public String getName()

Return the optional parameter name for this parameter.

setName

public void setName(String name)

Set the optional parameter name for this parameter.

Parameters:

name - The new parameter name, or null for no name

getValue

public Object getValue()

Returns the value property of the UIParameter.

setValue

public void setValue(Object value)

Sets the value property of the\ UIParameter.

Parameters:

value - the new value

saveState

public Object saveState(FacesContext context)

Description copied from interface: StateHolder

Gets the state of the instance as a Serializable Object.

If the class that implements this interface has references to instances that implement StateHolder (such as a UIComponent with event handlers, validators, etc.) this method must call the StateHolder.saveState(javax.faces.context.FacesContext) method on all those instances as well. This method must not save the state of children and facets. That is done via the StateManager

This method must not alter the state of the implementing object. In other words, after executing this code:

 Object state = component.saveState(facesContext);
 

component should be the same as before executing it.

The return from this method must be Serializable

Specified by:

saveState in interface StateHolder

Overrides:

saveState in class UIComponentBase

restoreState

public void restoreState(FacesContext context,
                         Object state)

Description copied from interface: StateHolder

Perform any processing required to restore the state from the entries in the state Object.

If the class that implements this interface has references to instances that also implement StateHolder (such as a UIComponent with event handlers, validators, etc.) this method must call the StateHolder.restoreState(javax.faces.context.FacesContext, java.lang.Object) method on all those instances as well.

Specified by:

restoreState in interface StateHolder

Overrides:

restoreState in class UIComponentBase