/*
 * Copyright 2004-2010 the Seasar Foundation and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.seasar.doma.internal.expr.node;

import static org.seasar.doma.internal.util.AssertionUtil.*;

/**
 * @author taedium
 * 
 */
public abstract class AbstractComparisonOperatorNode implements
        ComparisonOperatorNode {

    protected static final int PRIORITY = 40;

    protected final ExpressionLocation location;

    protected final String expression;

    protected ExpressionNode leftNode;

    protected ExpressionNode rightNode;

    protected AbstractComparisonOperatorNode(ExpressionLocation location,
            String expression) {
        assertNotNull(location, expression);
        this.location = location;
        this.expression = expression;
    }

    @Override
    public ExpressionNode getLeftNode() {
        return leftNode;
    }

    public void setLeftNode(ExpressionNode leftNode) {
        this.leftNode = leftNode;
    }

    @Override
    public ExpressionNode getRightNode() {
        return rightNode;
    }

    public void setRightNode(ExpressionNode rightNode) {
        this.rightNode = rightNode;
    }

    @Override
    public ExpressionLocation getLocation() {
        return location;
    }

    @Override
    public String getExpression() {
        return expression;
    }

    @Override
    public int getPriority() {
        return PRIORITY;
    }

    @Override
    public String toString() {
        return leftNode + " " + expression + " " + rightNode;
    }

}
