/**
* Copyright (C) 2010 dennis zhuang (killme2008@gmail.com)
*
* 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 program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
**/
package com.googlecode.aviator.runtime.function.math;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Map;
import com.googlecode.aviator.runtime.function.AbstractFunction;
import com.googlecode.aviator.runtime.function.FunctionUtils;
import com.googlecode.aviator.runtime.type.AviatorBigInt;
import com.googlecode.aviator.runtime.type.AviatorDecimal;
import com.googlecode.aviator.runtime.type.AviatorDouble;
import com.googlecode.aviator.runtime.type.AviatorObject;
import com.googlecode.aviator.utils.TypeUtils;
/**
* math.pow(d1,d2) function
*
* @author dennis
*
*/
public class MathPowFunction extends AbstractFunction {
@Override
public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2) {
Number left = FunctionUtils.getNumberValue(arg1, env);
Number right = FunctionUtils.getNumberValue(arg2, env);
if (TypeUtils.isBigInt(left)) {
return new AviatorBigInt(((BigInteger) left).pow(right.intValue()));
}
else if (TypeUtils.isDecimal(left)) {
return new AviatorDecimal(((BigDecimal) left).pow(right.intValue()));
}
else {
return new AviatorDouble(Math.pow(left.doubleValue(), right.doubleValue()));
}
}
@Override
public String getName() {
return "math.pow";
}
}