org.ldp4j.http.DoubleUtils.java Source code

Introduction

Here is the source code for org.ldp4j.http.DoubleUtils.java

Source

/**
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   This file is part of the LDP4j Project:
 *     http://www.ldp4j.org/
 *
 *   Center for Open Middleware
 *     http://www.centeropenmiddleware.com/
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   Copyright (C) 2014-2016 Center for Open Middleware.
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   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.
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   Artifact    : org.ldp4j.commons:ldp4j-commons-http:0.2.1
 *   Bundle      : ldp4j-commons-http-0.2.1.jar
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 */
package org.ldp4j.http;

import java.math.RoundingMode;

import com.google.common.math.DoubleMath;

final class DoubleUtils {

    private DoubleUtils() {
    }

    static boolean hasPrecision(final double value, final int decimals) {
        final double scaled = value * scale(decimals);
        return Double.doubleToRawLongBits(scaled - (long) scaled) == 0;
    }

    static double limitPrecision(final double value, final int decimals) {
        final double scale = scale(decimals);
        final long scaledValue = DoubleMath.roundToLong(value * scale, RoundingMode.HALF_EVEN);
        return ((double) scaledValue) / scale;
    }

    private static double scale(final int decimals) {
        return Math.pow(10D, decimals);
    }

}