commons-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Ryan Wisnesky (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LANG-1368) HashCodeBuilder.append incorrect behavior with chains of nulls
Date Sun, 12 Nov 2017 07:59:00 GMT
Ryan Wisnesky created LANG-1368:
-----------------------------------

             Summary: HashCodeBuilder.append incorrect behavior with chains of nulls
                 Key: LANG-1368
                 URL: https://issues.apache.org/jira/browse/LANG-1368
             Project: Commons Lang
          Issue Type: Bug
            Reporter: Ryan Wisnesky
            Priority: Minor


I have a 7-way choice/sum/variant class, so that 6 of its 7 fields are null in each object
of that class.  When using HashCodeBuilder's reflective hashCode, a 10k line java project
works correctly.  When using HashCodeBuilder.append instead, sequential calls to append with
a null argument cause the returned hashCode to be inconsistent with EqualsBuilder.  Correct
behavior can be restored by appending a dummy non-null field initially:

	new HashCodeBuilder()
					.append(true) //bad return value without this dummy call
					.append(chc1)
...
					.append(chc7)
					.toHashCode();
	



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

Mime
View raw message