/**
 *
 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 * 
 **/
package lucee.runtime.sql.old;


// Referenced classes of package Zql:
//            ZAliasedName, ZConstant, ZUtils, ZExp

public final class ZSelectItem extends ZAliasedName
{

    public ZSelectItem()
    {
        expression_ = null;
        aggregate_ = null;
    }

    public ZSelectItem(String s)
    {
        super(s, ZAliasedName.FORM_COLUMN);
        expression_ = null;
        aggregate_ = null;
        setAggregate(ZUtils.getAggregateCall(s));
    }

    public ZExp getExpression()
    {
        if(isExpression())
            return expression_;
        if(isWildcard())
            return null;
        return new ZConstant(getColumn(), 0);
    }

    public void setExpression(ZExp zexp)
    {
        expression_ = zexp;
        strform_ = expression_.toString();
    }

    public boolean isExpression()
    {
        return expression_ != null;
    }

    public void setAggregate(String s)
    {
        aggregate_ = s;
    }

    public String getAggregate()
    {
        return aggregate_;
    }

    ZExp expression_;
    String aggregate_;
}