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[[library-constraints,Constraints Library]]
= Constraints =

[devstatus]
--------------
source=libraries/constraints/dev-status.xml
--------------

The Constraints library provide a bunch of often used Constraints based on the
Zest™ Constraints api described in <<def-constraint>>.

Remember that you are not limited to constraints presents in this library, you
are encouraged to write your own constraints. See <<howto-create-constraint>>
or take a look at this library source code to learn how to write your own.

include::../../build/docs/buildinfo/artifact.txt[]

== Usage ==

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

[snippet,java]
----
source=libraries/constraints/src/test/java/org/apache/zest/library/constraints/TestCaseComposite.java
tag=constraints
----