public class MethodExpressionValidator extends java.lang.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.
NOT_IN_RANGE_MESSAGE_ID| Constructor and Description |
|---|
MethodExpressionValidator() |
MethodExpressionValidator(MethodExpression methodExpression)
Construct a
Validator that contains a MethodExpression. |
| Modifier and Type | Method and Description |
|---|---|
boolean |
isTransient()
If true, the Object implementing this interface must not
participate in state saving or restoring.
|
void |
restoreState(FacesContext context,
java.lang.Object state)
Perform any
processing required to restore the state from the entries in the
state Object.
|
java.lang.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,
java.lang.Object value)
|
public MethodExpressionValidator()
public MethodExpressionValidator(MethodExpression methodExpression)
Construct a Validator that contains a MethodExpression.
methodExpression - the expression to wrappublic void validate(FacesContext context, UIComponent component, java.lang.Object value) throws ValidatorException
ValidatorPerform 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.
For a validator to be fully compliant with Version 2 and later
of the specification, it must not fail validation on
null or empty values unless it is specifically
intended to address null or empty values. An
application-wide <context-param> is provided
to allow validators designed for Jakarta Server Faces 1.2 to work
with Jakarta Server Faces 2 and later.
The javax.faces.VALIDATE_EMPTY_FIELDS
<context-param> must be set to
false to enable this backwards compatibility
behavior.
validate in interface Validatorcontext - FacesContext for the request we are processingcomponent - UIComponent we are checking for correctnessvalue - the value to validatejava.lang.NullPointerException - if context
or component is nullValidatorException - if validation failspublic java.lang.Object saveState(FacesContext context)
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
saveState in interface StateHoldercontext - the Faces context.public void restoreState(FacesContext context, java.lang.Object state)
StateHolderPerform 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.
If the state
argument is null, take no action and return.
restoreState in interface StateHoldercontext - the Faces context.state - the state.public boolean isTransient()
StateHolderIf true, the Object implementing this interface must not participate in state saving or restoring.
isTransient in interface StateHoldertrue if transient, false otherwise.public void setTransient(boolean transientValue)
StateHolderDenotes whether or not the Object implementing this interface must or must not participate in state saving or restoring.
setTransient in interface StateHoldertransientValue - boolean pass true if this
Object will not
participate in state saving or restoring, otherwise pass
false.