/*
* This program 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, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package com.meidusa.amoeba.parser.function;
import java.util.List;
import com.meidusa.amoeba.parser.expression.Expression;
import com.meidusa.amoeba.sqljep.ParseException;
/**
*
* @author <a href=mailto:piratebase@sina.com>Struct chen</a>
*
*/
public class Add extends AbstractFunction {
@SuppressWarnings("unchecked")
public Comparable evaluate(List<Expression> list,Object[] parameters) throws ParseException {
if(list.size()==2){
Expression e1 = list.get(0);
Expression e2 = list.get(1);
if(e1.canEvaluate() && e2.canEvaluate()){
Comparable comparable = com.meidusa.amoeba.sqljep.function.Add.add(e1.evaluate(parameters),e2.evaluate(parameters));
return comparable;
}
}
return null;
}
public void toString(List<Expression> list,StringBuilder builder) {
if(list != null && list.size()>=2){
builder.append(list.get(0).toString());
builder.append(" ");
builder.append(getName());
builder.append(" ");
builder.append(list.get(1).toString());
}else{
builder.append(getName());
}
}
public String getName() {
return "+";
}
}