PoolingDataSource.PoolGuardConnectionWrapper equals() implementation incorrect
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                 Key: DBCP-198
                 URL: http://issues.apache.org/jira/browse/DBCP-198
             Project: Commons Dbcp
          Issue Type: Bug
    Affects Versions: 1.2.1
            Reporter: Kevin Ruland


The Object.equals( Object ) implementation in 
PoolingDataSource.PoolGuardConnectionWrapper is broken because it does not 
attempt to test if the outermost objects are equal.  It should be replaced with 
something like:

public boolean equals(Object obj) {
  if ( obj == this ) return true;
  if ( obj instanceof PoolGuardConnectionWrapper ) {
    return delegate.equals( ((PoolGuardConnectionWrapper) obj).delegate );
  return false;
}

The current implementation prevents putting PoolGuardConenctionWrapper objects 
in Collections and using the standard contains( Object ) or remove( Object ) 
methods.

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