public DelegatingDataSource(DataSource ds) 
{
        _ds = ds;
        if (_ds instanceof DelegatingDataSource)
            _del = (DelegatingDataSource) _ds;
        else
            _del = null;
}

Constructor. Supply wrapped data source.

 protected  void appendInfo(StringBuffer buf) 
{
        if (_del != null)
            _del.appendInfo(buf);
}

 public  void close() throws Exception 
{
        if (_ds instanceof Closeable)
            ((Closeable) _ds).close();
}

 public boolean equals(Object other) 
{
        if (other == this)
            return true;
        if (other instanceof DelegatingDataSource)
            other = ((DelegatingDataSource) other).getInnermostDelegate();
        return getInnermostDelegate().equals(other);
}

 public Connection getConnection() throws SQLException 
{
        return _ds.getConnection();
}

 public Connection getConnection(String user,
    String pass) throws SQLException 
{
        if (user == null && pass == null)
            return _ds.getConnection();
        return _ds.getConnection(user, pass);
}

 public DataSource getDelegate() 
{
        return _ds;
}

Return the wrapped data source.

 public DataSource getInnermostDelegate() 
{
        return (_del == null) ? _ds : _del.getInnermostDelegate();
}

Return the inner-most wrapped delegate.

 public PrintWriter getLogWriter() throws SQLException 
{
        return _ds.getLogWriter();
}

 public int getLoginTimeout() throws SQLException 
{
        return _ds.getLoginTimeout();
}

 public int hashCode() 
{
        return getInnermostDelegate().hashCode();
}

 public  void setLogWriter(PrintWriter out) throws SQLException 
{
        _ds.setLogWriter(out);
}

 public  void setLoginTimeout(int timeout) throws SQLException 
{
        _ds.setLoginTimeout(timeout);
}

 public String toString() 
{
        StringBuffer buf = new StringBuffer("datasource "). append(hashCode());
        appendInfo(buf);
        return buf.toString();
}