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Posted to commons-dev@ws.apache.org by "Davanum Srinivas (JIRA)" <ji...@apache.org> on 2007/06/19 04:57:26 UTC

[jira] Commented: (WSCOMMONS-189) NamespaceImpl and OMNamespaceImpl violate hashCode contract

    [ https://issues.apache.org/jira/browse/WSCOMMONS-189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12506011 ] 

Davanum Srinivas commented on WSCOMMONS-189:
--------------------------------------------

Fixed in svn revision 548566

thanks,
dims

> NamespaceImpl and OMNamespaceImpl violate hashCode contract
> -----------------------------------------------------------
>
>                 Key: WSCOMMONS-189
>                 URL: https://issues.apache.org/jira/browse/WSCOMMONS-189
>             Project: WS-Commons
>          Issue Type: Bug
>          Components: AXIOM
>            Reporter: Alexander Veit
>
> As the following test case shows, NamespaceImpl and OMNamespaceImpl violate the java.lang.Object contract between equals and hashCode.
> Additionally, if the test would turn from red to green, it would suggest to deprecate NamespaceImpl and OMNamespaceImpl, and to make OMNamespace a concrete class that would eventually replace NamespaceImpl and OMNamespaceImpl.
> public final class NamespaceImplTestCase extends junit.framework.TestCase 
> {
>     public void testEqualsHashCodeContract()
>     {
>         assertEquals(
>             new org.apache.axiom.om.impl.dom.NamespaceImpl("anyURI"),
>             new org.apache.axiom.om.impl.dom.NamespaceImpl("anyURI"));
>         assertEquals(
>             new org.apache.axiom.om.impl.dom.NamespaceImpl("anyURI", "prefix"),
>             new org.apache.axiom.om.impl.dom.NamespaceImpl("anyURI", "prefix"));
>         assertEquals(
>             new org.apache.axiom.om.impl.OMNamespaceImpl("anyURI", "prefix"),
>             new org.apache.axiom.om.impl.OMNamespaceImpl("anyURI", "prefix"));
>         assertEquals(
>             new org.apache.axiom.om.impl.dom.NamespaceImpl("anyURI", "prefix"),
>             new org.apache.axiom.om.impl.OMNamespaceImpl("anyURI", "prefix"));
>         assertEquals(
>             new org.apache.axiom.om.impl.OMNamespaceImpl("anyURI", "prefix"),
>             new org.apache.axiom.om.impl.dom.NamespaceImpl("anyURI", "prefix"));
>         assertEquals(
>             new org.apache.axiom.om.impl.dom.NamespaceImpl("anyURI").hashCode(),
>             new org.apache.axiom.om.impl.dom.NamespaceImpl("anyURI").hashCode());
>         assertEquals(
>             new org.apache.axiom.om.impl.dom.NamespaceImpl("anyURI", "prefix").hashCode(),
>             new org.apache.axiom.om.impl.dom.NamespaceImpl("anyURI", "prefix").hashCode());
>         assertEquals(
>             new org.apache.axiom.om.impl.OMNamespaceImpl("anyURI", "prefix").hashCode(),
>             new org.apache.axiom.om.impl.OMNamespaceImpl("anyURI", "prefix").hashCode());
>     }
> }
> Patch: add
>     public int hashCode() {
>         return uri.hashCode() ^ (prefix != null ? prefix.hashCode() : 0);
>     }

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