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org.apache.myfaces.trinidad.validator
Class ByteLengthValidator

java.lang.Object
org.apache.myfaces.trinidad.validator.ByteLengthValidator

All Implemented Interfaces:

java.util.EventListener, javax.faces.component.StateHolder, javax.faces.validator.Validator

public class ByteLengthValidator

extends java.lang.Object

implements javax.faces.component.StateHolder, javax.faces.validator.Validator

ByteLengthValidator is a Validator that checks the value of the corresponding component for its byte length for the set character encoding. The following algorithm is implemented:

• If the passed value is null, exit immediately.
• If the current component value is not of String type throw IllegalArgumentException
• If both encoding and maximum property has been configured on this Validator, check the component value byte length against the maximum. If the component value byte length is greater than this specified maximum, throw a ValidatorException containing a MAXIMUM_MESSAGE_ID message.
• If only maximum property has been configured on this Validator, check the component value against this limit defaulting the encoding to be iso-8859-1. If the component value length is greater than the specified maximum, throw a ValidatorException containing a MAXIMUM_MESSAGE_ID message.
• If a encoding property has been configured on this Validator, and if it is not a valid Java encoding, then throws a IllegalCharsetNameException
• If maximumMessageDetail is set, it is used for constructing faces message, when validation fails. The message can contain placeholders which will be replaced as specified in MAXIMUM_MESSAGE_ID

Version:

$Name: $ ($Revision: adfrt/faces/adf-faces-api/src/main/java/oracle/adf/view/faces/validator/ByteLengthValidator.java#0 $) $Date: 10-nov-2005.19:08:32 $

See Also:

setMessageDetailMaximum(String)

Field Summary

static java.lang.String	MAXIMUM_MESSAGE_ID The message identifier of the FacesMessage to be created if the maximum byte length check fails.
static java.lang.String	VALIDATOR_ID Standard validator id for this validator.

Fields inherited from interface javax.faces.validator.Validator

NOT_IN_RANGE_MESSAGE_ID

Constructor Summary

ByteLengthValidator()
Construct a Validator with iso-8859-1 as the encoding and zero as the maximum bytes allowed.

ByteLengthValidator(int maximum, java.lang.String encoding)
Construct a Validator with the specified preconfigured values.

Method Summary

boolean	equals(java.lang.Object object) Compares this ByteLengthValidator with the specified Object for equality.
java.lang.String	getEncoding() Return the character encoding set for this Validator or iso-8859-1 if it has not been set.
java.lang.String	getHintMaximum() Return custom hint message.
protected javax.faces.application.FacesMessage	getLengthValidationFailureMessage(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component, java.lang.String value) The FacesMessage to be returned if byte length validation fails.
int	getMaximum() Return the maximum bytes to be enforced by this Validator or zero if it has not been set.
java.lang.String	getMessageDetailMaximum() Return custom detail error message that was set for creating FacesMessage, for values that exceeds the maximum byte length.
javax.faces.el.ValueBinding	getValueBinding(java.lang.String name) Deprecated.
javax.el.ValueExpression	getValueExpression(java.lang.String name) Return the ValueExpression used to calculate the value for the specified attribute name, if any.
int	hashCode() Returns the hash code for this Validator.
boolean	isTransient()
void	restoreState(javax.faces.context.FacesContext context, java.lang.Object state)
java.lang.Object	saveState(javax.faces.context.FacesContext context)
void	setEncoding(java.lang.String encoding) Set the character encoding for this Validator.
void	setHintMaximum(java.lang.String hintMaximum) Custom hint message.
void	setMaximum(int maximum) Set the maximum bytes to be enforced by this Validator.
void	setMessageDetailMaximum(java.lang.String maximumMessageDetail) Custom error message to be used, for creating detail part of the FacesMessage, when users input exceeds the maximum byte length.
void	setTransient(boolean transientValue)
void	setValueBinding(java.lang.String name, javax.faces.el.ValueBinding binding) Deprecated.
void	setValueExpression(java.lang.String name, javax.el.ValueExpression expression) Set the ValueExpression used to calculate the value for the specified attribute if any.
void	validate(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component, java.lang.Object value) Validates unless it is too long, in which case throws ValidatorException.

Methods inherited from class java.lang.Object

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

Field Detail

MAXIMUM_MESSAGE_ID

public static final java.lang.String MAXIMUM_MESSAGE_ID

The message identifier of the FacesMessage to be created if the maximum byte length check fails. The message format string for this message may optionally include {0}, {1} and {2} placeholders, which will be replaced by input value, label associated with the component and the maximum bytes respectively.

See Also:

Constant Field Values

VALIDATOR_ID

public static final java.lang.String VALIDATOR_ID

Standard validator id for this validator.

See Also:

Constant Field Values

Constructor Detail

ByteLengthValidator

public ByteLengthValidator()

Construct a Validator with iso-8859-1 as the encoding and zero as the maximum bytes allowed.

ByteLengthValidator

public ByteLengthValidator(int maximum,
                           java.lang.String encoding)

Construct a Validator with the specified preconfigured values.

Parameters:

maximum - the maximum number of bytes allowed.

encoding - the Java character set encoding. This must be an encoding supported by Java.

Method Detail

setEncoding

public void setEncoding(java.lang.String encoding)

Set the character encoding for this Validator.

Parameters:

encoding - The character encoding.

getEncoding

public java.lang.String getEncoding()

Return the character encoding set for this Validator or iso-8859-1 if it has not been set.

setMaximum

public void setMaximum(int maximum)

Set the maximum bytes to be enforced by this Validator.

Parameters:

maximum - The new maximum value

getMaximum

public int getMaximum()

Return the maximum bytes to be enforced by this Validator or zero if it has not been set.

setMessageDetailMaximum

public void setMessageDetailMaximum(java.lang.String maximumMessageDetail)

Custom error message to be used, for creating detail part of the FacesMessage, when users input exceeds the maximum byte length.

Overrides detail message identified by message id MAXIMUM_MESSAGE_ID

Parameters:

maximumMessageDetail - Custom error message.

getMessageDetailMaximum

public java.lang.String getMessageDetailMaximum()

Return custom detail error message that was set for creating FacesMessage, for values that exceeds the maximum byte length.

Returns:

Custom error message.

See Also:

setMessageDetailMaximum(String)

setHintMaximum

public void setHintMaximum(java.lang.String hintMaximum)

Custom hint message.

Overrides default hint message

Parameters:

hintMaximum - Custom hint message.

getHintMaximum

public java.lang.String getHintMaximum()

Return custom hint message.

Returns:

Custom hint message.

See Also:

setHintMaximum(String)

validate

public void validate(javax.faces.context.FacesContext context,
                     javax.faces.component.UIComponent component,
                     java.lang.Object value)
              throws javax.faces.validator.ValidatorException

Validates unless it is too long, in which case throws ValidatorException.

Specified by:

validate in interface javax.faces.validator.Validator

Throws:

javax.faces.validator.ValidatorException - if validation fails

java.lang.NullPointerException - if context

java.nio.charset.IllegalCharsetNameException - if encoding is

java.lang.IllegalArgumentException - if value is not of type String unsupported or component is null

saveState

public java.lang.Object saveState(javax.faces.context.FacesContext context)

Specified by:

saveState in interface javax.faces.component.StateHolder

restoreState

public void restoreState(javax.faces.context.FacesContext context,
                         java.lang.Object state)

Specified by:

restoreState in interface javax.faces.component.StateHolder

isTransient

public boolean isTransient()

Specified by:

isTransient in interface javax.faces.component.StateHolder

setTransient

public void setTransient(boolean transientValue)

Specified by:

setTransient in interface javax.faces.component.StateHolder

setValueExpression

public void setValueExpression(java.lang.String name,
                               javax.el.ValueExpression expression)

Set the ValueExpression used to calculate the value for the specified attribute if any.

Parameters:

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

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

Throws:

java.lang.NullPointerException - if name is null

java.lang.IllegalArgumentException - if name is not a valid attribute of this converter

getValueExpression

public javax.el.ValueExpression getValueExpression(java.lang.String name)

Return the ValueExpression used to calculate the value for the specified attribute name, if any.

Parameters:

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

Throws:

java.lang.NullPointerException - if name is null

java.lang.IllegalArgumentException - if name is not a valid attribute of this converter

setValueBinding

public void setValueBinding(java.lang.String name,
                            javax.faces.el.ValueBinding binding)

Deprecated.

Set the ValueBinding used to calculate the value for the specified attribute if any.

Parameters:

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

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

Throws:

java.lang.NullPointerException - if name is null

java.lang.IllegalArgumentException - if name is not a valid attribute of this validator

getValueBinding

public javax.faces.el.ValueBinding getValueBinding(java.lang.String name)

Deprecated.

Return the ValueBinding used to calculate the value for the specified attribute name, if any.

Parameters:

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

Throws:

java.lang.NullPointerException - if name is null

java.lang.IllegalArgumentException - if name is not a valid attribute of this validator

equals

public boolean equals(java.lang.Object object)

Compares this ByteLengthValidator with the specified Object for equality.

Overrides:

equals in class java.lang.Object

Parameters:

object - Object to which this ByteLengthValidator is to be compared.

Returns:

true if and only if the specified Object is a ByteLengthValidator and if the values encoding, maximum and transient are equal.

hashCode

public int hashCode()

Returns the hash code for this Validator.

Overrides:

hashCode in class java.lang.Object

Returns:

a hash code value for this object.

getLengthValidationFailureMessage

protected javax.faces.application.FacesMessage getLengthValidationFailureMessage(javax.faces.context.FacesContext context,
                                                                                 javax.faces.component.UIComponent component,
                                                                                 java.lang.String value)

The FacesMessage to be returned if byte length validation fails.

Parameters:

context - Faces context

value - The value entered / set by the user on the component

Returns:

error message when the length exceeds the maximum byte length set.

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