DoubleMath.java

// Copyright 2015 Ivan Popivanov
//
// Licensed 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 net.tradelib.core;

import java.math.BigDecimal;
import java.math.RoundingMode;

public class DoubleMath {
   public static double round(double value, int places) {
      if(Double.isNaN(value) || Double.isInfinite(value)) {
         return value;
      }

      if (places < 0) {
         throw new IllegalArgumentException();
      }

      BigDecimal bd = new BigDecimal(value);
      bd = bd.setScale(places, RoundingMode.HALF_UP);
      return bd.doubleValue();
   }
}