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@Documented @Retention(value=RUNTIME) @Target(value={FIELD,PARAMETER,METHOD,TYPE}) @Constraint(checkWith=AssertCheck.class) public @interface Assert
Check if evaluating the expression in the specified expression language returns true.
Required Element Summary | |
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String |
expr
Formula in the given expression language describing the constraint. |
String |
lang
the expression language that is used, e.g. |
Optional Element Summary | |
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ConstraintTarget[] |
appliesTo
In case the constraint is declared for an array, collection or map this controls how the constraint is applied to it and it's child objects. |
String |
errorCode
failure code passed to the ConstraintViolation object |
String |
message
message to be used for constructing the ConstraintViolation object |
String[] |
profiles
The associated constraint profiles. |
int |
severity
severity passed to the ConstraintViolation object |
String |
target
An expression to specify where in the object graph relative from this object the expression should be applied. |
String |
when
Formula returning true if this constraint shall be evaluated and
false if it shall be ignored for the current validation. |
Element Detail |
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public abstract String expr
true
if the constraint is satisfied.
Available context variables are:
_this -> the validated bean
_value -> the value to validate (e.g. the field value, parameter value, method return value,
or the validated bean for object level constraints)
public abstract String lang
public abstract ConstraintTarget[] appliesTo
In case the constraint is declared for an array, collection or map this controls how the constraint is applied to it and it's child objects.
Default: ConstraintTarget.CONTAINER
Note: This setting is ignored for object types other than array, map and collection.
public abstract String errorCode
public abstract String message
ConstraintViolation
public abstract String[] profiles
public abstract int severity
public abstract String target
Examples:
owner
owner
's property id
public abstract String when
true
if this constraint shall be evaluated and
false
if it shall be ignored for the current validation.
Important: The formula must be prefixed with the name of the scripting language that is used.
E.g. groovy:_this.amount > 10
Available context variables are:
_this -> the validated bean
_value -> the value to validate (e.g. the field value, parameter value, method return value,
or the validated bean for object level constraints)
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