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https://issues.apache.org/jira/browse/LANG-780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13168068#comment-13168068
]
Alex Pokotilo commented on LANG-780:
------------------------------------
enum hashCode is different between JVM instances. so adding append(Enum value)
will covern this case.
Following example will cover what I'm talking about
public class j
{
enum TestEnum
{
ONE,
TWO
}
private static int hashCodeForEnum(Enum enumItem)
{
return enumItem.name().hashCode();
}
public static void main(String[] args)
{
TestEnum e = TestEnum.ONE;
System.out.print(e.hashCode());
System.out.print(" ");
System.out.print(hashCodeForEnum(e));
}
}
System.out.print(hashCodeForEnum(e)); will always return the same value but
System.out.print(e.hashCode()); will not . I want HashCodeBuilder cover this
for me.
> add public org.apache.commons.lang.builder.HashCodeBuilder append(Enum
> value) to HashCodeBuilder
> --------------------------------------------------------------------------------------------------
>
> Key: LANG-780
> URL: https://issues.apache.org/jira/browse/LANG-780
> Project: Commons Lang
> Issue Type: Bug
> Components: lang.builder.*
> Affects Versions: 2.5
> Reporter: Alex Pokotilo
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> Since Enum's hashCode return different values between calls this can cause
> different values if enum appended to HashCodeBuilder
> IMHO adding append for enum would be enough to solve this entirely
> public org.apache.commons.lang.builder.HashCodeBuilder append(Enum value)
> {
> append(value.name().hashCode());
> return this;
> }
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