Java BigDecimal from toBigDecimal(long seconds, int nanoseconds)

Description

to Big Decimal

License

Apache License

Declaration

public static BigDecimal toBigDecimal(long seconds, int nanoseconds) 

Method Source Code

//package com.java2s;
/*//from ww w . ja  v a 2s  . co  m
 * Copyright 2013 FasterXML.com
 *
 * 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.
 */

import java.math.BigDecimal;

public class Main {
    /**
     * @since 2.7.3
     */
    public static BigDecimal toBigDecimal(long seconds, int nanoseconds) {
        if (nanoseconds == 0L) {
            // 14-Mar-2015, tatu: Let's retain one zero to avoid interpretation
            //    as integral number
            if (seconds == 0L) { // except for "0.0" where it can not be done without scientific notation
                return BigDecimal.ZERO.setScale(1);
            }
            return BigDecimal.valueOf(seconds).setScale(9);
        }
        return new BigDecimal(toDecimal(seconds, nanoseconds));
    }

    public static String toDecimal(long seconds, int nanoseconds) {
        StringBuilder sb = new StringBuilder(20).append(seconds)
                .append('.');
        // 14-Mar-2016, tatu: Although we do not yet (with 2.7) trim trailing zeroes,
        //   for general case, 
        if (nanoseconds == 0L) {
            // !!! TODO: 14-Mar-2016, tatu: as per [datatype-jsr310], should trim
            //     trailing zeroes
            if (seconds == 0L) {
                return "0.0";
            }

            //            sb.append('0');
            sb.append("000000000");
        } else {
            StringBuilder nanoSB = new StringBuilder(9);
            nanoSB.append(nanoseconds);
            // May need to both prepend leading nanos (if value less than 0.1)
            final int nanosLen = nanoSB.length();
            int prepZeroes = 9 - nanosLen;
            while (prepZeroes > 0) {
                --prepZeroes;
                sb.append('0');
            }

            // !!! TODO: 14-Mar-2016, tatu: as per [datatype-jsr310], should trim
            //     trailing zeroes
            /*
            // AND possibly trim trailing ones
            int i = nanosLen;
            while ((i > 1) && nanoSB.charAt(i-1) == '0') {
                --i;
            }
            if (i < nanosLen) {
                nanoSB.setLength(i);
            }
             */
            sb.append(nanoSB);
        }
        return sb.toString();
    }
}

Related

1. toBigDecimal(final String bigdecimal)
2. toBigDecimal(final String string)
3. toBigDecimal(final String value)
4. toBigDecimal(Integer num)
5. toBigDecimal(JsonValue val)
6. toBigDecimal(Number n)
7. toBigDecimal(Number n)
8. toBigDecimal(Number n)
9. toBigDecimal(Number n)