@Override
	public boolean equals( final Object obj ) {
		if( this == obj ) {
			return true;
		}
		if( obj == null ) {
			return false;
		}
		if( getClass() != obj.getClass() ) {
			return false;
		}
		final Data other = (Data) obj;
		if( id != other.id ) {
			return false;
		}
		return true;
	}