Java BigDecimal Encode encodeRealNumberRange(BigDecimal number, int maxNumDigits, BigDecimal offsetValue)

Description

encode Real Number Range

License

Apache License

Declaration

public static String encodeRealNumberRange(BigDecimal number, int maxNumDigits, BigDecimal offsetValue) 

Method Source Code

//package com.java2s;
/**/*w  w w.  ja v a  2  s  .c  om*/
 * *****************************************************************************
 * Copyright 2007 Amazon Technologies, Inc. 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://aws.amazon.com/apache2.0 This file 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.
 * ***************************************************************************** __ _ _ ___ ( )( \/\/ )/ __) /__\ \ / \__ \ (_)(_) \/\/ (___/
 *
 * Amazon Simple DB Java Library API Version: 2007-11-07 Generated: Fri Jan 18 01:13:17 PST 2008
 *
 */

import java.math.BigDecimal;

public class Main {
    private static final int BASE = 10;

    public static String encodeRealNumberRange(BigDecimal number, int maxNumDigits, BigDecimal offsetValue) {
        final BigDecimal offsetNumber = number.add(offsetValue);
        final String longString = offsetNumber.toString();
        final int numZeroes = maxNumDigits - longString.length();
        final int paddedSize = numZeroes + longString.length();
        final StringBuilder strBuffer = new StringBuilder(paddedSize);
        for (int i = 0; i < numZeroes; i++) {
            strBuffer.insert(i, '0');
        }
        strBuffer.append(longString);

        return strBuffer.toString();
    }

    public static String encodeRealNumberRange(BigDecimal number, int maxDigitsLeft, int maxDigitsRight,
            BigDecimal offsetValue) {
        BigDecimal shiftMultiplier = new BigDecimal(Math.pow(BASE, maxDigitsRight));
        BigDecimal shiftedNumber = number.multiply(shiftMultiplier);
        shiftedNumber = shiftedNumber.setScale(0, BigDecimal.ROUND_HALF_UP);
        final BigDecimal shiftedOffset = offsetValue.multiply(shiftMultiplier);
        final BigDecimal offsetNumber = shiftedNumber.add(shiftedOffset);
        String longString = offsetNumber.toString();
        final int numBeforeDecimal = longString.length();
        final int numZeroes = maxDigitsLeft + maxDigitsRight - numBeforeDecimal;
        final int paddedSize = numZeroes + longString.length();
        final StringBuilder strBuffer = new StringBuilder(paddedSize);
        for (int i = 0; i < numZeroes; i++) {
            strBuffer.insert(i, '0');
        }
        strBuffer.append(longString);
        return strBuffer.toString();
    }
}

Related

1. encodeImage(BufferedImage bufferedImage, File file)
2. encodePackedBCD(BigDecimal v, int decimals, int length)
3. encodeRealNumberRange(BigDecimal number, int maxNumDigits, BigDecimal offsetValue)