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
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.
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 jakarta.faces.VALIDATE_EMPTY_FIELDS
<context-param>
must be set to false
to enable this backwards compatibility behavior.
validate
in interface Validator
context
- FacesContext for the request we are processingcomponent
- UIComponent we are checking for correctnessvalue
- the value to validatejava.lang.NullPointerException
- if context
or component
is null
ValidatorException
- 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(jakarta.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 StateHolder
context
- the Faces context.public void restoreState(FacesContext context, java.lang.Object state)
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(jakarta.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 StateHolder
context
- the Faces context.state
- the state.public boolean isTransient()
StateHolder
If true, the Object implementing this interface must not participate in state saving or restoring.
isTransient
in interface StateHolder
true
if transient, false
otherwise.public void setTransient(boolean transientValue)
StateHolder
Denotes whether or not the Object implementing this interface must or must not participate in state saving or restoring.
setTransient
in interface StateHolder
transientValue
- boolean pass true
if this Object will
not participate in state saving or restoring, otherwise pass false
.