public boolean equals(Object other) { if ( (this == other ) ) return true; if ( (other == null ) ) return false; if ( !(other instanceof AbstractExpression) ) return false; AbstractExpression castOther = ( AbstractExpression ) other; return ( (this.getUniquename()==castOther.getUniquename()) || ( this.getUniquename()!=null && castOther.getUniquename()!=null && this.getUniquename().equals(castOther.getUniquename()) ) ); }