net.sourceforge.stripes.validation.Validate Maven / Gradle / Ivy
/* Copyright 2005-2006 Tim Fennell
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.sourceforge.stripes.validation;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.annotation.ElementType;
import java.lang.annotation.Documented;
/**
* Primary annotation used to specify validations for form fields. Allows quick and easy
* specifiction of the most common types of validation logic, as well as a way to specify
* custom validations.
*
* @author Tim Fennell
*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD, ElementType.METHOD})
@Documented
public @interface Validate {
/**
* The name of the field to validate. This attribute is ignored when the validation is
* attached to a simple (one form field to one ActionBean field) property, and is used only
* when specifying nested validations.
*/
String field() default "";
/**
* If set to true, requires that a non-null, non-empty value must be submitted for the field.
*/
boolean required() default false;
/**
* If required=true, restricts the set of events to which the required check is applied.
* If required=false (or omitted) this setting has no effect. This setting is entirely
* optional and if omitted then the field will simply be required for all events.
*
* Can be specified as either a positive list (e.g. on={"save, "update"}) in which case the
* required check will be performed only on the listed events. Can also be specified as an
* inverted list (e.g. on="!new") in which case the check will be performed on all events that
* are not listed. Cannot contain a mix of "!event" and "event" since it does not make sense!
*
*/
String[] on() default {};
/**
* If set to true will cause the property to be ignore by binding and validation even if it
* was somehow submitted in the request.
*
* @since Stripes 1.1
*/
boolean ignore() default false;
/**
* Specifies a minimum length of characters that must be submitted. This validation is performed
* on the String value before any other validations or conversions are made.
*/
int minlength() default -1;
/**
* Specifies a maximum length of characters that must be submitted. This validation is performed
* on the String value before any other validations or conversions are made.
*/
int maxlength() default -1;
/**
* Specifies the minimum numeric value acceptable for a numeric field. This validation is
* performed after the field has been converted to it's java type. This validation is only
* valid on numeric types (including BigInteger and BigDecimal).
*/
double minvalue() default Double.MIN_VALUE;
/**
* Specifies the maximum numeric value acceptable for a numeric field. This validation is
* performed after the field has been converted to it's java type. This validation is only
* valid on numeric types (including BigInteger and BigDecimal).
*/
double maxvalue() default Double.MAX_VALUE;
/**
* Specifies a regular expression mask to be used to check the format of the String value
* submitted. The mask will be compiled into a java.util.regex.Pattern for use.
*/
String mask() default "";
/**
* Specifies an expression in the JSP expression language that should be evaluated
* to check the validity of this field. In the case of lists, arrays and maps the expression
* is evaluated once for each value supplied. The expression is evaluated only if
* a value is supplied - it will not be evaluated if the user did not supply a value for the
* field.
*
* The value being validated is available in the EL variable 'this'. Properties of the
* ActionBean (including the context) can be referenced directly, as can values in request
* and session scope if necessary.
*
* Note: it is not necessary to encapsulate the expression in ${} as on a JSP page.
*/
String expression() default "";
/**
* A type converter to use to convert this field from String to it's rich object type. If none
* is specified (which should be very common) then the default converter for the target type of
* object will be used.
*/
Class converter() default TypeConverter.class;
}