SelectExpressionItem.java

/* ================================================================
 * JSQLParser : java based sql parser 
 * ================================================================
 *
 * Project Info:  http://jsqlparser.sourceforge.net
 * Project Lead:  Leonardo Francalanci (leoonardoo@yahoo.it);
 *
 * (C) Copyright 2004, by Leonardo Francalanci
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 */
package net.sf.jsqlparser.statement.select;

import net.sf.jsqlparser.expression.Expression;

/**
 * An expression as in "SELECT expr1 AS EXPR"
 */
public class SelectExpressionItem implements SelectItem {

    private Expression expression;
    private Alias alias;
    private String comment;

    public Alias getAlias() {
        return alias;
    }

    public String getAliasName() {
        return alias != null ? alias.getName() : "";
    }

    public Expression getExpression() {
        return expression;
    }

    public void setAlias(Alias alias) {
        this.alias = alias;
    }

    public void setExpression(Expression expression) {
        this.expression = expression;
    }

    public void accept(SelectItemVisitor selectItemVisitor) {
        selectItemVisitor.visit(this);
    }

    @Override
    public String toString() {
        return expression + (alias != null ? " " + alias : "");
    }

    /**
     * @return the comment
     */
    public String getComment() {
        return comment;
    }

    /**
     * @param comment the comment to set
     */
    public void setComment(String comment) {
        this.comment = comment;
    }
}