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https://issues.apache.org/jira/browse/XERCESJ-1665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14936792#comment-14936792
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Michael Glavassevich commented on XERCESJ-1665:
-----------------------------------------------

org.apache.xerces.impl.dtd.DTDGrammar is an internal class. The intended "user" 
of its methods was only other internal classes within Xerces which are expected 
to be passing around internalized strings.

> DTDGrammar.QNameHashtable.get(String key) compares by reference
> ---------------------------------------------------------------
>
>                 Key: XERCESJ-1665
>                 URL: https://issues.apache.org/jira/browse/XERCESJ-1665
>             Project: Xerces2-J
>          Issue Type: Bug
>          Components: DTD
>            Reporter: Nikola Sprljan
>            Priority: Minor
>
> When key is matched with bucket the reference comparison is done:
> {noformat}
> if ((String)bucket[j] == key) {
> {noformat}
> This will work if a string literal is provided as a key, but not for any 
> String object. As a consequence dtdGrammar.getElementDeclIndex(String s) does 
> not work for String objects. 



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