MethodExpressionValidator (Java EE 5 SDK)

Java

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Java EE 5 SDK

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javax.faces.validator Class MethodExpressionValidator

java.lang.Object
  extended by javax.faces.validator.MethodExpressionValidator
所有已实现的接口:
EventListener, StateHolder, Validator
public class MethodExpressionValidator
extends Object
implements Validator, StateHolder

MethodExpressionValidator is a Validator that wraps a MethodExpression, and it performs validation by executing a method on an object identified by the MethodExpression.

字段摘要
 
Fields inherited from interface javax.faces.validator.Validator
NOT_IN_RANGE_MESSAGE_ID
 
构造器摘要
MethodExpressionValidator()
           
MethodExpressionValidator(MethodExpression methodExpression)
          Construct a Validator that contains a MethodExpression.
 
方法摘要
 boolean isTransient()
          If true, the Object implementing this interface must not participate in state saving or restoring.
 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 setTransient(boolean transientValue)
          Denotes whether or not the Object implementing this interface must or must not participate in state saving or restoring.
 void validate(FacesContext context, UIComponent component, Object value)
          Perform the correctness checks implemented by this Validator against the specified UIComponent.
 
类方法继承 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

构造器详细信息

MethodExpressionValidator

public MethodExpressionValidator()

MethodExpressionValidator

public MethodExpressionValidator(MethodExpression methodExpression)

Construct a Validator that contains a MethodExpression.

方法详细信息

validate

public void validate(FacesContext context,
                     UIComponent component,
                     Object value)
              throws ValidatorException
Description copied from interface: Validator

Perform the correctness checks implemented by this Validator against the specified UIComponent. If any violations are found, a ValidatorException will be thrown containing the FacesMessage describing the failure.

规范说明:
validate in interface Validator
参数:
context - FacesContext for the request we are processing
component - UIComponent we are checking for correctness
value - the value to validate
抛出异常:
NullPointerException - if context or component is null
ValidatorException - if validation fails

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

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

isTransient

public boolean isTransient()
Description copied from interface: StateHolder

If true, the Object implementing this interface must not participate in state saving or restoring.

规范说明:
isTransient in interface StateHolder

setTransient

public void setTransient(boolean transientValue)
Description copied from interface: StateHolder

Denotes whether or not the Object implementing this interface must or must not participate in state saving or restoring.

规范说明:
setTransient in interface StateHolder
参数:
transientValue - boolean pass true if this Object will participate in state saving or restoring, otherwise pass false.
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
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