Constraints

code

docs

tests

The Constraints library provide a bunch of often used Constraints based on the Zest™ Constraints api described in Constraint.

Remember that you are not limited to constraints presents in this library, you are encouraged to write your own constraints. See Create a Constraint or take a look at this library source code to learn how to write your own.

Table 27. Artifact

Group ID	Artifact ID	Version
org.qi4j.library	org.qi4j.library.constraints	2.1

Usage

You can use theses constraints on Properties or on method arguments. Here are some examples:

import org.qi4j.library.constraints.annotation.*;
  [...snip...]

@Contains( "foo" ) Property<String> containsString();

@Email Property<String> email();

@URL Property<String> url();

@URI Property<String> uri();

@GreaterThan( 10 ) Property<Integer> greaterThan();

@InstanceOf( List.class ) Property<Collection> instanceOf();

@LessThan( 10 ) Property<Integer> lessThan();

@Matches( "a*b*c*" ) Property<String> matches();

@MaxLength( 3 ) Property<String> maxLength();

@MinLength( 3 ) Property<String> minLength();

@NotEmpty Property<String> notEmptyString();

@NotEmpty Property<Collection> notEmptyCollection();

@NotEmpty Property<List> notEmptyList();

@Range( min = 0, max = 100 ) Property<Integer> range();

@OneOf( { "Bar", "Xyzzy" } ) Property<String> oneOf();

void testParameters( @GreaterThan( 10 ) Integer greaterThan );