/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (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.apache.org/licenses/LICENSE-2.0
*
* 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.apache.poi.sl.draw.geom;
import java.util.regex.Matcher;
/**
* Square Root Formula:
* <gd name="x" fmla="sqrt y"/>
*
* <p>
* Arguments: 1 (fmla="sqrt x")
* Usage: "sqrt x" = sqrt(x) = value of this guide
* </p>
* @author Yegor Kozlov
*/
public class SqrtExpression implements Expression {
private String arg;
SqrtExpression(Matcher m){
arg =m.group(1);
}
public double evaluate(Context ctx){
double val = ctx.getValue(arg);
return Math.sqrt(val);
}
}