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/**
 * Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
 * 
 * Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
 * 
 * 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.tinygroup.tinysqldsl.expression;

import org.tinygroup.tinysqldsl.base.StatementSqlBuilder;

/**
 * It represents an expression like "(" expression ")"
 */
public class Parenthesis implements Expression {

    private Expression expression;
    private boolean not = false;

    public Parenthesis(Expression expression) {
        this(expression, false);
    }

    public Parenthesis(Expression expression, boolean not) {
        super();
        this.expression = expression;
        this.not = not;
    }

    public Expression getExpression() {
        return expression;
    }

    public void setNot() {
        not = true;
    }

    public boolean isNot() {
        return not;
    }

    public String toString() {
        return (not ? "NOT " : "") + "(" + expression + ")";
    }

    public void builderExpression(StatementSqlBuilder builder) {
        StringBuilder buffer = builder.getStringBuilder();
        if (isNot()) {
            buffer.append(" NOT ");
        }

        buffer.append("(");
        getExpression().builderExpression(builder);
        buffer.append(")");
    }
}