UIGraphic (Java EE 5)

UIGraphic 是将图形图像显示给用户的 UIComponent。用户无法操作此组件；它仅用于显示目的。

默认情况下，rendererType 属性必须设置为 "javax.faces.Image"。可以调用 setRendererType() 方法更改此值。

UIGraphic is a UIComponent that displays a graphical image to the user. The user cannot manipulate this component; it is for display purposes only.

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

英文文档：

COMPONENT_TYPE

public static final String COMPONENT_TYPE

The standard component type for this component.

See Also:

Constant Field Values

英文文档：

COMPONENT_FAMILY

public static final String COMPONENT_FAMILY

The standard component family for this component.

See Also:

Constant Field Values

public UIGraphic()

使用默认属性值创建新的 UIGraphic 实例。

英文文档：

UIGraphic

public UIGraphic()

Create a new UIGraphic instance with default property values.

public String getFamily()

英文文档：

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

public String getUrl()

返回此 UIGraphic 的图像 URL。此方法是 getValue() 的一个类型安全别名。

英文文档：

getUrl

public String getUrl()

Return the image URL for this UIGraphic. This method is a typesafe alias for getValue().

public void setUrl(String url)

设置此 UIGraphic 的图像 URL。此方法是 setValue() 的一个类型安全别名。

url

新的图像 URL

英文文档：

setUrl

public void setUrl(String url)

Set the image URL for this UIGraphic. This method is a typesafe alias for setValue().

Parameters:

url - The new image URL

public Object getValue()

返回 UIGraphic 的 value 属性。这通常呈现为一个 URL。

英文文档：

getValue

public Object getValue()

Returns the value property of the UIGraphic. This will typically be rendered as an URL.

public void setValue(Object value)

设置 UIGraphic 的 value 属性。这通常呈现为一个 URL。

value

新值

英文文档：

setValue

public void setValue(Object value)

Sets the value property of the UIGraphic. This will typically be rendered as an URL.

Parameters:

value - the new value

public ValueBinding getValueBinding(String name)

如果请求 url 的 ValueBinding，则返回任何为 value 设置的 ValueBinding；否则，执行此方法的默认超类处理。

name	要为其获取 ValueBinding 的属性的名称
Throws	NullPointerException: 如果 name 为 null
deprecated	此方法已由 #getValueExpression(java.lang.String) 替代。

英文文档：

getValueBinding

public ValueBinding getValueBinding(String name)

Deprecated. This has been replaced by getValueExpression(java.lang.String).

Return any ValueBinding set for value if a ValueBinding for url is requested; otherwise, perform the default superclass processing for this method.

Overrides:

getValueBinding in class UIComponentBase

Parameters:

name - Name of the attribute or property for which to retrieve a ValueBinding

Throws:

NullPointerException - if name is null

public void setValueBinding(String name, ValueBinding binding)

改为存储 value 下为 url 指定的任何 ValueBinding；否则，执行此方法的默认超类处理。在任何情况下，都要依赖超类将 ValueBinding 转换为 ValueExpression。

name	要为其设置 ValueBinding 的属性的名称
binding	要设置的 ValueBinding，或为 null 以移除任何当前设置的 ValueBinding
Throws	NullPointerException: 如果 name 为 null
deprecated	此方法已由 #setValueExpression 替代。

英文文档：

setValueBinding

public void setValueBinding(String name,
                            ValueBinding binding)

Deprecated. This has been replaced by setValueExpression(java.lang.String, javax.el.ValueExpression).

Store any ValueBinding specified for url under value instead; otherwise, perform the default superclass processing for this method. In all cases, the superclass is relied on to convert the ValueBinding to a ValueExpression.

Overrides:

setValueBinding in class UIComponentBase

Parameters:

name - Name of the attribute or property for which to set a ValueBinding

binding - The ValueBinding to set, or null to remove any currently set ValueBinding

Throws:

NullPointerException - if name is null

public ValueExpression getValueExpression(String name)

如果请求 url 的 ValueExpression，则返回任何为 value 设置的 ValueExpression；否则，执行此方法的默认超类处理。

name	要为其获取 ValueExpression 的属性的名称
Throws	NullPointerException: 如果 name 为 null
since	1.2

英文文档：

getValueExpression

public ValueExpression getValueExpression(String name)

Return any ValueExpression set for value if a ValueExpression for url is requested; otherwise, perform the default superclass processing for this method.

Overrides:

getValueExpression in class UIComponent

Parameters:

name - Name of the attribute or property for which to retrieve a ValueExpression

Throws:

NullPointerException - if name is null

Since:

1.2

public void setValueExpression(String name, ValueExpression binding)

改为存储 value 下为 url 指定的任何 ValueExpression；否则，执行此方法的默认超类处理。

name	要为其设置 ValueExpression 的属性的名称
binding	要设置的 ValueExpression，或为 null 以移除任何当前设置的 ValueExpression
Throws	NullPointerException: 如果 name 为 null
since	1.2

英文文档：

setValueExpression

public void setValueExpression(String name,
                               ValueExpression binding)

Store any ValueExpression specified for url under value instead; otherwise, perform the default superclass processing for this method.

Overrides:

setValueExpression in class UIComponent

Parameters:

name - Name of the attribute or property for which to set a ValueExpression

binding - The ValueExpression to set, or null to remove any currently set ValueExpression

Throws:

NullPointerException - if name is null

Since:

1.2

public Object saveState(FacesContext context)

英文文档：

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

public void restoreState(FacesContext context,
                         Object state)