This section describes the Bean Validation functionality and Bean Validation operations.

The following table describes the Bean Validation functionality.

Table 10-2 Bean Validation functionality

No.	Function		Overview
1	Validating the input values		This functionality validates the validation definition specifying the value set up in JavaBean.
		Group management functionality	This functionality groups the validation.
		Message management functionality	This functionality manages the messages returned when the validation result is an error.
		Payload management functionality	This functionality categorizes the validation results.#
2	Functionality for creating a custom validator		This functionality creates specific validation processing.
3	Bootstrap functionality		This functionality enables you to change the Bean Validation provider.

#

If Bean Validation is integrated and used with JSF, the payload management functionality cannot be used.

You can use the Bean Validation function by specifying annotations. The following table describes the annotation classes provided by the Bean Validation function, the variable types that can be specified, and the operations when annotations are specified in the variable types that cannot be specified.

Table 10-3 Annotation classes provided by the Bean Validation function and the types of variables

No.	Annotation class	Specifiable variable types	Operations when annotations are specified in the non-specifiable variable types	Remarks
1	Null	Can be specified in all types	--	--
2	NotNull	Can be specified in all types	--	--
3	AssertTrue	boolean/java.lang.Boolean	javax.validation.UnexpectedTypeException is thrown.	--
4	AssertFalse	boolean/java.lang.Boolean	javax.validation.UnexpectedTypeException is thrown.	--
5	Min	java.math.BigDecimal java.math.BigInteger byte/java.lang.Byte short/java.lang.Short int/java.lang.Integer long/java.lang.Long float/java.lang.Float double/java.lang.Double java.lang.String	javax.validation.UnexpectedTypeException is thrown.	--
6	Max	java.math.BigDecimal java.math.BigInteger byte/java.lang.Byte short/java.lang.Short int/java.lang.Integer long/java.lang.Long float/java.lang.Float double/java.lang.Double java.lang.String	javax.validation.UnexpectedTypeException is thrown.	--
7	DecimalMin	java.math.BigDecimal java.math.BigInteger java.lang.String byte/java.lang.Byte short/java.lang.Short int/java.lang.Integer long/java.lang.Long float/java.lang.Float double/java.lang.Double	javax.validation.UnexpectedTypeException is thrown.	If a value that cannot be parsed with java.math.BigDecimal is specified for the value attribute, javax.validation.ValidationException is thrown.
8	DecimalMax	java.math.BigDecimal java.math.BigInteger java.lang.String byte/java.lang.Byte short/java.lang.Short int/java.lang.Integer long/java.lang.Long float/java.lang.Float double/java.lang.Double	javax.validation.UnexpectedTypeException is thrown.	If a value that cannot be parsed with java.math.BigDecimal is specified for the value attribute, javax.validation.ValidationException is thrown.
9	Size	java.lang.String java.util.Collection java.util.Map Array	javax.validation.UnexpectedTypeException is thrown.	If a negative value is specified for the max and min attributes, javax.validation.ValidationException is thrown. If a value greater than max is specified in the value for min, javax.validation.ValidationException is thrown.
10	Digits	java.math.BigDecimal java.math.BigInteger java.lang.String byte/java.lang.Byte short/java.lang.Short int/java.lang.Integer long/java.lang.Long float/java.lang.Float double/java.lang.Double	javax.validation.UnexpectedTypeException is thrown.	If a negative value is specified for the integer and fraction attributes, javax.validation.ValidationException is thrown.
11	Past	java.util.Date java.util.Calendar	javax.validation.UnexpectedTypeException is thrown.	--
12	Future	java.util.Date java.util.Calendar	javax.validation.UnexpectedTypeException is thrown.	--
13	Pattern	java.lang.String	javax.validation.UnexpectedTypeException is thrown.	If the value specified for the regexp attribute is an incorrect regular expression, the javax.validation.ValidationException exception is thrown. The validity of the regular expression depends on the java.util.regex.Pattern specifications.

Legend:

--: Not applicable.