You need to override the equals method on Proposition : ( Collections
use the equals method to check for equality )
You have to take care when you override the equals method that you
implement the contract of the equals method properly... ( Check the
JavaDoc on java.lang.Object )...
If you don't... you get some VERY funky behaviour on collections... :)
.... this SHOULD implement the contract of equals() correctly... just
give it another pair of eyballs...
public boolean equals( Object o ) {
if ( ! o instanceof Proposition ) {
return false;
}
if ( o == null ) {
return false;
}
return ObjectUtils.equals(getName(),other.getName());
}
ObjectUtils is part of commons-lang and takes care of all the
additional null checking...
The lazy developers friend.. :):):)
Cheers,
Renier
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