Subversion Repositories mkgmap

/*
 * Copyright (C) 2008 Steve Ratcliffe
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *
 * Author: Steve Ratcliffe
 * Create date: 03-Nov-2008
 */
package uk.me.parabola.mkgmap.osmstyle.eval;

/**
 * A base class that can be used for binary operations.
 * It has a second operand.
 *
 * @author Steve Ratcliffe
 */
public abstract class AbstractBinaryOp extends AbstractOp implements BinaryOp {

        private Op second;

        public Op getSecond() {
                return second;
        }

        public void setSecond(Op second) {
                this.second = second;
        }

        public String toString() {
                StringBuilder sb = new StringBuilder();

                if (getSecond() instanceof LinkedOp) {
                        // NOTE: care needed the toString method is used in compile() and we have
                        // to therefore produce something unique to the expression.
                        // It looks ugly at the moment because of that.
                        sb.append("# Part of previous OR: ");
                }

                boolean needParen;

                needParen = this.hasHigherPriority(getFirst());
                if (needParen)
                        sb.append('(');
                sb.append(getFirst().toString());
                if (needParen)
                        sb.append(')');

                sb.append(' ');
                sb.append(getType().toSymbol());
                sb.append(' ');

                needParen = this.hasHigherPriority(getSecond());
                if (needParen)
                        sb.append('(');
                sb.append(getSecond().toString());
                if (needParen)
                        sb.append(')');

                return sb.toString();
        }
}