UIOutput (Java EE 5 SDK)

Java

previous page next page
概述  软件包   类  树  已过时  索引  帮助 
Java EE 5 SDK

深圳电信培训中心.徐海蛟老师.
 上一个类   下一个类 框架    无框架    
摘要: 嵌套 | 字段 | 构造器 | 方法 详细信息: 字段 | 构造器 | 方法

javax.faces.component Class UIOutput

java.lang.Object
  extended by javax.faces.component.UIComponent
      extended by javax.faces.component.UIComponentBase
          extended by javax.faces.component.UIOutput
所有已实现的接口:
StateHolder, ValueHolder
直接已知子类:
HtmlOutputFormat, HtmlOutputLabel, HtmlOutputLink, HtmlOutputText, UIInput
public class UIOutput
extends UIComponentBase
implements ValueHolder

UIOutput is a UIComponent that has a value, optionally retrieved from a model tier bean via a value expression, that is displayed to the user. The user cannot directly modify the rendered value; it is for display purposes only.

During the Render Response phase of the request processing lifecycle, the current value of this component must be converted to a String (if it is not already), according to the following rules:

  • If the current value is not null, and is not already a String, locate a Converter (if any) to use for the conversion, as follows:
    • If getConverter() returns a non-null Converter, use that one, otherwise
    • If Application.createConverter(Class), passing the current value's class, returns a non-null Converter, use that one.
  • If the current value is not null and a Converter was located, call its getAsString() method to perform the conversion.
  • If the current value is not null but no Converter was located, call toString() on the current value to perform the conversion.

By default, the rendererType property must be set to "javax.faces.Text". This value can be changed by calling the setRendererType() method.

字段摘要
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
 
构造器摘要
UIOutput()
          Create a new UIOutput instance with default property values.
 
方法摘要
 Converter getConverter()
          Return the Converter (if any) that is registered for this UIComponent.
 String getFamily()
          Return the identifier of the component family to which this component belongs.
 Object getLocalValue()
          Return the local value of this UIComponent (if any), without evaluating any associated ValueExpression.
 Object getValue()
          Gets the value of this UIComponent.
 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 setConverter(Converter converter)
          Set the Converter (if any) that is registered for this UIComponent.
 void setValue(Object value)
          Set the value of this UIComponent (if any).
 
类方法继承 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, invokeOnComponent, isRendered, isTransient, processDecodes, processRestoreState, processSaveState, processUpdates, processValidators, queueEvent, removeFacesListener, restoreAttachedState, saveAttachedState, setId, setParent, setRendered, setRendererType, setTransient, setValueBinding
 
类方法继承 javax.faces.component.UIComponent
encodeAll, getContainerClientId, getValueExpression, setValueExpression
 
类方法继承 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

字段详细信息

COMPONENT_TYPE

public static final String COMPONENT_TYPE

The standard component type for this component.

另请参见:
常量字段

COMPONENT_FAMILY

public static final String COMPONENT_FAMILY

The standard component family for this component.

另请参见:
常量字段

构造器详细信息

UIOutput

public UIOutput()

Create a new UIOutput instance with default property values.

方法详细信息

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.

规范说明:
getFamily in class UIComponent

getConverter

public Converter getConverter()
Description copied from interface: ValueHolder

Return the Converter (if any) that is registered for this UIComponent.

规范说明:
getConverter in interface ValueHolder

setConverter

public void setConverter(Converter converter)
Description copied from interface: ValueHolder

Set the Converter (if any) that is registered for this UIComponent.

规范说明:
setConverter in interface ValueHolder
参数:
converter - New Converter (or null)

getLocalValue

public Object getLocalValue()
Description copied from interface: ValueHolder

Return the local value of this UIComponent (if any), without evaluating any associated ValueExpression.

规范说明:
getLocalValue in interface ValueHolder

getValue

public Object getValue()
Description copied from interface: ValueHolder

Gets the value of this UIComponent. First, consult the local value property of this component. If non-null return it. If null, see if we have a ValueExpression for the value property. If so, return the result of evaluating the property, otherwise return null. Note that because the specification for UIComponent.setValueBinding(java.lang.String, javax.faces.el.ValueBinding) requires a call through to UIComponent.setValueExpression(java.lang.String, javax.el.ValueExpression), legacy tags will continue to work.

规范说明:
getValue in interface ValueHolder

setValue

public void setValue(Object value)
Description copied from interface: ValueHolder

Set the value of this UIComponent (if any).

规范说明:
setValue in interface ValueHolder
参数:
value - The new local 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

规范说明:
saveState in interface StateHolder
重写:
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.

规范说明:
restoreState in interface StateHolder
重写:
restoreState in class UIComponentBase
概述  软件包   类  树  已过时  索引  帮助 
Java EE 5 SDK

深圳电信培训中心.徐海蛟老师.
 上一个类   下一个类 框架    无框架    
摘要: 嵌套 | 字段 | 构造器 | 方法 详细信息: 字段 | 构造器 | 方法
提交错误或意见

版权所有 2007 Sun Microsystems, Inc. 保留所有权利。 请遵守许可证条款。深圳电信培训中心.徐海蛟老师教学参考.

previous page start next page