Operator.java

/**
 * Copyright (c) 2002-2013 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.cypherdsl.query;

import java.io.Serializable;

import org.neo4j.cypherdsl.AsString;
import org.neo4j.cypherdsl.expression.Expression;

/**
 * Represents the left part and the operator in an operation. E.g. 1 + 2 -> 1 and + are handled here. This is used
 * with a Value that holds an Operator and deals with the 2.
 */
public class Operator
        implements AsString, Serializable
{
    public final Expression left; // null if this is a unary operator
    public final String operator;

    public Operator( String operator )
    {
        this( null, operator );
    }

    public Operator( Expression left, String operator )
    {
        this.left = left;
        this.operator = operator;
    }

    @Override
    public void asString( StringBuilder builder )
    {
        if ( left != null )
        {
            left.asString( builder );
        }
        builder.append( operator );
    }
}