# ConstraintBinding.java

**Category:** [Reference Implementation: Java (archive)](https://discourse.openehr.org/c/reference-implementation-java-archive/154)
**Created:** 2012-12-11 10:44 UTC
**Views:** 8
**Replies:** 2
**URL:** https://discourse.openehr.org/t/constraintbinding-java/14288

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## Post #1 by @system

Hi again,

There is a class org.openehr.am.archetype.ontology.ConstraintBinding.java in the Java RM implementation and I wonder if this is just a left-over from long ago?
It doesn't seem to be used at all unless I am missing something? Could this be deleted?

Also, I would like to overwrite equals and hashCode methods for
QueryBindingItem, ConstraintBindingItem, OntologyBindingItem, OntologyBinding

Are you ok with this?

Cheers
Sebastian

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## Post #2 by @system

Sebastian,

If it's not used by any other classes, it's probably a left\-over\. To
be sure, please make a full run of unit tests in the java project\.

Go ahead with equals\(\) and hashCode\(\) methods in mentioned classes\.

/Rong

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## Post #3 by @system

Thanks Rong, I already did that and it comes up with no problems Cheers Sebastian

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**Canonical:** https://discourse.openehr.org/t/constraintbinding-java/14288
**Original content:** https://discourse.openehr.org/t/constraintbinding-java/14288