javax.faces.validator

Class BeanValidator

java.lang.Object

javax.faces.validator.BeanValidator

All Implemented Interfaces:

EventListener, PartialStateHolder, StateHolder, Validator

public class BeanValidator
extends Object
implements Validator, PartialStateHolder

A Validator that delegates validation of the bean property to the Bean Validation API.

Since:

2.0

Field Summary

Fields

Modifier and Type	Field and Description
static String	DISABLE_DEFAULT_BEAN_VALIDATOR_PARAM_NAME If this param is defined, and calling toLowerCase().equals(“true”) on a String representation of its value returns true, the runtime must not automatically add the validator with validator-id equal to the value of the symbolic constant VALIDATOR_ID to the list of default validators.
static String	EMPTY_VALIDATION_GROUPS_PATTERN The regular expression pattern that identifies an empty list of validation groups.
static String	ENABLE_VALIDATE_WHOLE_BEAN_PARAM_NAME If this param is set, and calling toLowerCase().equals("true") on a String representation of its value returns true take the additional actions relating to <validateWholeBean /> specified in validate(javax.faces.context.FacesContext, javax.faces.component.UIComponent, java.lang.Object).
static String	MESSAGE_ID The message identifier of the FacesMessage to be created if a constraint failure is found.
static String	VALIDATION_GROUPS_DELIMITER The delimiter that is used to separate the list of fully-qualified group names as strings.
static String	VALIDATOR_FACTORY_KEY The name of the Jakarta Servlet context attribute which holds the object used by Jakarta Server Faces to obtain Validator instances.
static String	VALIDATOR_ID The standard validator id for this validator, as defined by the Jakarta Server Face specification.

Fields inherited from interface javax.faces.validator.Validator

NOT_IN_RANGE_MESSAGE_ID

Constructor Summary

Constructors

Constructor and Description
BeanValidator()

Method Summary

Modifier and Type	Method and Description
void	clearInitialState() Reset the PartialStateHolder to a non-delta tracking state.
String	getValidationGroups() Return the validation groups passed to the Validation API when checking constraints.
boolean	initialStateMarked() Return true if delta state changes are being tracked, otherwise false
boolean	isTransient() If true, the Object implementing this interface must not participate in state saving or restoring.
void	markInitialState() The runtime must ensure that the PartialStateHolder.markInitialState() method is called on each instance of this interface in the view at the appropriate time to indicate the component is in its initial state.
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	setValidationGroups(String validationGroups) A comma-separated list of validation groups which are used to filter which validations get checked by this validator.
void	validate(FacesContext context, UIComponent component, Object value) Verify that the value is valid according to the Bean Validation constraints.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

VALIDATOR_ID

public static final String VALIDATOR_ID

The standard validator id for this validator, as defined by the Jakarta Server Face specification.

See Also:

Constant Field Values

MESSAGE_ID

public static final String MESSAGE_ID

The message identifier of the FacesMessage to be created if a constraint failure is found. The message format string for this message may optionally include the following placeholders:

• {0} replaced by the interpolated message from Bean Validation.
• {1} replaced by a String whose value is the label of the input component that produced this message.

The message format string provided by the default implementation should be a the placeholder {0}, thus fully delegating the message handling to Bean Validation. A developer can override this message format string to make it conform to other Jakarta Server Face validator messages (i.e., by including the component label)

See Also:

Constant Field Values

VALIDATOR_FACTORY_KEY

public static final String VALIDATOR_FACTORY_KEY

The name of the Jakarta Servlet context attribute which holds the object used by Jakarta Server Faces to obtain Validator instances. If the Jakarta Servlet context attribute is missing or contains a null value, Jakarta Server Faces is free to use this Jakarta Servlet context attribute to store the ValidatorFactory bootstrapped by this validator.

See Also:

Constant Field Values

VALIDATION_GROUPS_DELIMITER

public static final String VALIDATION_GROUPS_DELIMITER

The delimiter that is used to separate the list of fully-qualified group names as strings.

See Also:

Constant Field Values

EMPTY_VALIDATION_GROUPS_PATTERN

public static final String EMPTY_VALIDATION_GROUPS_PATTERN

The regular expression pattern that identifies an empty list of validation groups.

See Also:

Constant Field Values

DISABLE_DEFAULT_BEAN_VALIDATOR_PARAM_NAME

public static final String DISABLE_DEFAULT_BEAN_VALIDATOR_PARAM_NAME

If this param is defined, and calling toLowerCase().equals(“true”) on a String representation of its value returns true, the runtime must not automatically add the validator with validator-id equal to the value of the symbolic constant VALIDATOR_ID to the list of default validators. Setting this parameter to true will have the effect of disabling the automatic installation of Bean Validation to every input component in every view in the application, though manual installation is still possible.

See Also:

Constant Field Values

ENABLE_VALIDATE_WHOLE_BEAN_PARAM_NAME

public static final String ENABLE_VALIDATE_WHOLE_BEAN_PARAM_NAME

If this param is set, and calling toLowerCase().equals("true") on a String representation of its value returns true take the additional actions relating to <validateWholeBean /> specified in validate(javax.faces.context.FacesContext, javax.faces.component.UIComponent, java.lang.Object).

Since:

2.3

See Also:

Constant Field Values

Constructor Detail

BeanValidator

public BeanValidator()

Method Detail

setValidationGroups

public void setValidationGroups(String validationGroups)

A comma-separated list of validation groups which are used to filter which validations get checked by this validator. If the validationGroupsArray attribute is omitted or is empty, the validation groups will be inherited from the branch defaults or, if there are no branch defaults, the Default group will be used.

Parameters:

validationGroups - comma-separated list of validation groups (string with only spaces and commas treated as null)

getValidationGroups

public String getValidationGroups()

Return the validation groups passed to the Validation API when checking constraints. If the validationGroupsArray attribute is omitted or empty, the validation groups will be inherited from the branch defaults, or if there are no branch defaults, the Default group will be used.

Returns:

the value of the validatinGroups attribute.

validate

public void validate(FacesContext context,
                     UIComponent component,
                     Object value)

Verify that the value is valid according to the Bean Validation constraints.

Obtain a ValidatorFactory instance by calling Validation.buildDefaultValidatorFactory().

Let validationGroupsArray be a Class [] representing validator groups set on the component by the tag handler for this validator. The first search component terminates the search for the validation groups value. If no such value is found use the class name of Default as the value of the validation groups.

Let valueExpression be the return from calling UIComponent.getValueExpression(java.lang.String) on the argument component, passing the literal string “value” (without the quotes) as an argument. If this application is running in an environment with a Unified EL Implementation for Java EE6 or later, obtain the ValueReference from valueExpression and let valueBaseClase be the return from calling ValueReference.getBase() and valueProperty be the return from calling ValueReference.getProperty(). If an earlier version of Jakarta Expression Language is present, use the appropriate methods to inspect valueExpression and derive values for valueBaseClass and valueProperty.

If no ValueReference can be obtained, take no action and return.

If ValueReference.getBase() return null, take no action and return.

Obtain the ValidatorContext from the ValidatorFactory.

Decorate the MessageInterpolator returned from ValidatorFactory.getMessageInterpolator() with one that leverages the Locale returned from UIViewRoot.getLocale(), and store it in the ValidatorContext using ValidatorContext.messageInterpolator(javax.validation.MessageInterpolator).

Obtain the Validator instance from the validatorContext.

Obtain a javax.validation.BeanDescriptor from the javax.validation.Validator. If hasConstraints() on the BeanDescriptor returns false, take no action and return. Otherwise proceed.

Call Validator.validateValue(java.lang.Class<T>, java.lang.String, java.lang.Object, java.lang.Class<?>...), passing valueBaseClass, valueProperty, the value argument, and validatorGroupsArray as arguments.

If the returned Set<ConstraintViolation> is non-empty, for each element in the Set, create a FacesMessage where the summary and detail are the return from calling ConstraintViolation.getMessage(). Capture all such FacesMessage instances into a Collection and pass them to ValidatorException.ValidatorException(java.util.Collection). If the ENABLE_VALIDATE_WHOLE_BEAN_PARAM_NAME application parameter is enabled and this Validator instance has validation groups other than or in addition to the Default group, record the fact that this field failed validation so that any <f:validateWholeBean /> component later in the tree is able to skip class-level validation for the bean for which this particular field is a property. Regardless of whether or not ENABLE_VALIDATE_WHOLE_BEAN_PARAM_NAME is set, throw the new exception.

If the returned Set is empty, the ENABLE_VALIDATE_WHOLE_BEAN_PARAM_NAME application parameter is enabled and this Validator instance has validation groups other than or in addition to the Default group, record the fact that this field passed validation so that any <f:validateWholeBean /> component later in the tree is able to allow class-level validation for the bean for which this particular field is a property.

Specified by:

validate in interface Validator

Parameters:

context - FacesContext for the request we are processing

component - UIComponent we are checking for correctness

value - the value to validate

Throws:

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

Specified by:

saveState in interface StateHolder

Parameters:

context - the Faces context.

Returns:

the saved state.

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.

If the state argument is null, take no action and return.

Specified by:

restoreState in interface StateHolder

Parameters:

context - the Faces context.

state - the state.

markInitialState

public void markInitialState()

Description copied from interface: PartialStateHolder

The runtime must ensure that the PartialStateHolder.markInitialState() method is called on each instance of this interface in the view at the appropriate time to indicate the component is in its initial state. The implementor of the interface must ensure that PartialStateHolder.initialStateMarked() returns true from the time markInitialState() is called until PartialStateHolder.clearInitialState() is called, after which time initialStateMarked() must return false. Also, during the time that the instance returns true from initialStateMarked(), the implementation must return only the state that has changed in its implementation of StateHolder.saveState(javax.faces.context.FacesContext).

Specified by:

markInitialState in interface PartialStateHolder

initialStateMarked

public boolean initialStateMarked()

Description copied from interface: PartialStateHolder

Return true if delta state changes are being tracked, otherwise false

Specified by:

initialStateMarked in interface PartialStateHolder

Returns:

true if the initial state is marked, false otherwise.

clearInitialState

public void clearInitialState()

Description copied from interface: PartialStateHolder

Reset the PartialStateHolder to a non-delta tracking state.

Specified by:

clearInitialState in interface PartialStateHolder

isTransient

public boolean isTransient()

Description copied from interface: StateHolder

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

Specified by:

isTransient in interface StateHolder

Returns:

true if transient, false otherwise.

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.

Specified by:

setTransient in interface StateHolder

Parameters:

transientValue - boolean pass true if this Object will not participate in state saving or restoring, otherwise pass false.