Example usage for java.math BigDecimal scale

Introduction

In this page you can find the example usage for java.math BigDecimal scale.

Prototype

int scale

To view the source code for java.math BigDecimal scale.

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Document

The scale of this BigDecimal, as returned by #scale .

Usage

From source file:org.pentaho.di.jdbc.Support.java

/**
 * Normalize a BigDecimal value so that it fits within the
 * available precision./*from w w w  .ja v a 2 s.  c o m*/
 *
 * @param value The decimal value to normalize.
 * @param maxPrecision The decimal precision supported by the server
 *        (assumed to be a value of either 28 or 38).
 * @return The possibly normalized decimal value as a <code>BigDecimal</code>.
 * @throws SQLException If the number is too big.
 */
static BigDecimal normalizeBigDecimal(BigDecimal value, int maxPrecision) throws SQLException {

    if (value == null) {
        return null;
    }

    if (value.scale() < 0) {
        // Java 1.5 BigDecimal allows negative scales.
        // jTDS cannot send these so re-scale.
        value = value.setScale(0);
    }

    if (value.scale() > maxPrecision) {
        // This is an optimization to quickly adjust the scale of a
        // very precise BD value. For example
        // BigDecimal((double)1.0/3.0) yields a BD 54 digits long!
        value = value.setScale(maxPrecision, BigDecimal.ROUND_HALF_UP);
    }

    BigInteger max = MAX_VALUE_38;

    while (value.abs().unscaledValue().compareTo(max) > 0) {
        // OK we need to reduce the scale if possible to preserve
        // the integer part of the number and still fit within the
        // available precision.
        int scale = value.scale() - 1;

        if (scale < 0) {
            // Can't do it number just too big
            throw new SQLException(
                    BaseMessages.getString(PKG, "error.normalize.numtoobig", String.valueOf(maxPrecision)),
                    "22000");
        }

        value = value.setScale(scale, BigDecimal.ROUND_HALF_UP);
    }

    return value;
}

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From source file:org.projectforge.web.wicket.converter.BigDecimalPercentConverter.java

@Override
public BigDecimal convertToObject(String value, final Locale locale) {
    value = StringUtils.trimToEmpty(value);
    if (value.endsWith("%") == true) {
        value = value.substring(0, value.length() - 1).trim();
    }/*w  ww .  java  2 s . c  o  m*/
    BigDecimal bd = super.convertToObject(value, locale);
    if (bd != null && decimalFormat == true) {
        bd = bd.divide(NumberHelper.HUNDRED, bd.scale() + 2, RoundingMode.HALF_UP);
    }
    return bd;
}

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From source file:eu.bittrade.libs.steemj.protocol.Asset.java

/**
 * Set the amount of this asset.//from ww  w .  j a  v  a2s.  c  o  m
 * 
 * @param amount
 *            The amount.
 */
public void setAmount(BigDecimal amount) {
    if (amount.scale() > this.getPrecision()) {
        throw new InvalidParameterException("The provided 'amount' has a 'scale' of " + amount.scale()
                + ", but needs to have a 'scale' of " + this.getPrecision() + " when " + this.getSymbol().name()
                + " is used as a AssetSymbolType.");
    }

    this.amount = amount.multiply(BigDecimal.valueOf(Math.pow(10, this.getPrecision()))).longValue();
}

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From source file:Main.java

public static BigDecimal log10(BigDecimal b) {
    final int NUM_OF_DIGITS = SCALE + 2;
    // need to add one to get the right number of dp
    //  and then add one again to get the next number
    //  so I can round it correctly.

    MathContext mc = new MathContext(NUM_OF_DIGITS, RoundingMode.HALF_EVEN);
    //special conditions:
    // log(-x) -> exception
    // log(1) == 0 exactly;
    // log of a number lessthan one = -log(1/x)
    if (b.signum() <= 0) {
        throw new ArithmeticException("log of a negative number! (or zero)");
    } else if (b.compareTo(BigDecimal.ONE) == 0) {
        return BigDecimal.ZERO;
    } else if (b.compareTo(BigDecimal.ONE) < 0) {
        return (log10((BigDecimal.ONE).divide(b, mc))).negate();
    }//from   w  ww.  ja  va2s .c o  m

    StringBuilder sb = new StringBuilder();
    //number of digits on the left of the decimal point
    int leftDigits = b.precision() - b.scale();

    //so, the first digits of the log10 are:
    sb.append(leftDigits - 1).append(".");

    //this is the algorithm outlined in the webpage
    int n = 0;
    while (n < NUM_OF_DIGITS) {
        b = (b.movePointLeft(leftDigits - 1)).pow(10, mc);
        leftDigits = b.precision() - b.scale();
        sb.append(leftDigits - 1);
        n++;
    }

    BigDecimal ans = new BigDecimal(sb.toString());

    //Round the number to the correct number of decimal places.
    ans = ans.round(new MathContext(ans.precision() - ans.scale() + SCALE, RoundingMode.HALF_EVEN));
    return ans;
}

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From source file:Main.java

public static BigDecimal log10(BigDecimal b) {
    final int NUM_OF_DIGITS = SCALE + 2;
    // need to add one to get the right number of dp
    // and then add one again to get the next number
    // so I can round it correctly.

    MathContext mc = new MathContext(NUM_OF_DIGITS, RoundingMode.HALF_EVEN);
    // special conditions:
    // log(-x) -> exception
    // log(1) == 0 exactly;
    // log of a number lessthan one = -log(1/x)
    if (b.signum() <= 0) {
        throw new ArithmeticException("log of a negative number! (or zero)");
    } else if (b.compareTo(BigDecimal.ONE) == 0) {
        return BigDecimal.ZERO;
    } else if (b.compareTo(BigDecimal.ONE) < 0) {
        return (log10((BigDecimal.ONE).divide(b, mc))).negate();
    }/*from  w w w  .j  av a 2 s . c  om*/

    StringBuilder sb = new StringBuilder();
    // number of digits on the left of the decimal point
    int leftDigits = b.precision() - b.scale();

    // so, the first digits of the log10 are:
    sb.append(leftDigits - 1).append(".");

    // this is the algorithm outlined in the webpage
    int n = 0;
    while (n < NUM_OF_DIGITS) {
        b = (b.movePointLeft(leftDigits - 1)).pow(10, mc);
        leftDigits = b.precision() - b.scale();
        sb.append(leftDigits - 1);
        n++;
    }

    BigDecimal ans = new BigDecimal(sb.toString());

    // Round the number to the correct number of decimal places.
    ans = ans.round(new MathContext(ans.precision() - ans.scale() + SCALE, RoundingMode.HALF_EVEN));
    return ans;
}

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From source file:org.osaf.cosmo.eim.schema.text.TriageStatusFormat.java

public Object parseObject(String source, ParsePosition pos) {
    if (pos.getIndex() > 0)
        return null;

    int index = 0;

    String[] chunks = source.split(" ", 3);
    if (chunks.length != 3) {
        parseException = new ParseException("Incorrect number of chunks: " + chunks.length, 0);
        pos.setErrorIndex(index);/*from ww w .j ava2s.  co  m*/
        return null;
    }

    TriageStatus ts = entityFactory.createTriageStatus();

    try {
        pos.setIndex(index);
        Integer code = new Integer(chunks[0]);
        // validate the code as being known
        TriageStatusUtil.label(code);
        ts.setCode(code);
        index += chunks[0].length() + 1;
    } catch (Exception e) {
        parseException = new ParseException(e.getMessage(), 0);
        pos.setErrorIndex(index);
        return null;
    }

    try {
        pos.setIndex(index);
        BigDecimal rank = new BigDecimal(chunks[1]);
        if (rank.scale() != 2)
            throw new NumberFormatException("Invalid rank value " + chunks[1]);
        ts.setRank(rank);
        index += chunks[1].length() + 1;
    } catch (NumberFormatException e) {
        parseException = new ParseException(e.getMessage(), 0);
        pos.setErrorIndex(index);
        return null;
    }

    if (chunks[2].equals(AUTOTRIAGE_ON))
        ts.setAutoTriage(Boolean.TRUE);
    else if (chunks[2].equals(AUTOTRIAGE_OFF))
        ts.setAutoTriage(Boolean.FALSE);
    else {
        parseException = new ParseException("Invalid autotriage value " + chunks[2], 0);
        pos.setErrorIndex(index);
        return null;
    }
    index += chunks[2].length();

    pos.setIndex(index);

    return ts;
}

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From source file:com.rabbitmq.client.impl.ValueWriter.java

public final void writeFieldValue(Object value) throws IOException {
    if (value instanceof String) {
        writeOctet('S');
        writeLongstr((String) value);
    } else if (value instanceof LongString) {
        writeOctet('S');
        writeLongstr((LongString) value);
    } else if (value instanceof Integer) {
        writeOctet('I');
        writeLong((Integer) value);
    } else if (value instanceof BigDecimal) {
        writeOctet('D');
        BigDecimal decimal = (BigDecimal) value;
        writeOctet(decimal.scale());
        BigInteger unscaled = decimal.unscaledValue();
        if (unscaled.bitLength() > 32) /*Integer.SIZE in Java 1.5*/
            throw new IllegalArgumentException("BigDecimal too large to be encoded");
        writeLong(decimal.unscaledValue().intValue());
    } else if (value instanceof Date) {
        writeOctet('T');
        writeTimestamp((Date) value);
    } else if (value instanceof Map) {
        writeOctet('F');
        // Ignore the warnings here.  We hate erasure
        // (not even a little respect)
        // (We even have trouble recognising it.)
        @SuppressWarnings("unchecked")
        Map<String, Object> map = (Map<String, Object>) value;
        writeTable(map);// w w w  . j av a2s  . c o  m
    } else if (value instanceof Byte) {
        writeOctet('b');
        out.writeByte((Byte) value);
    } else if (value instanceof Double) {
        writeOctet('d');
        out.writeDouble((Double) value);
    } else if (value instanceof Float) {
        writeOctet('f');
        out.writeFloat((Float) value);
    } else if (value instanceof Long) {
        writeOctet('l');
        out.writeLong((Long) value);
    } else if (value instanceof Short) {
        writeOctet('s');
        out.writeShort((Short) value);
    } else if (value instanceof Boolean) {
        writeOctet('t');
        out.writeBoolean((Boolean) value);
    } else if (value instanceof byte[]) {
        writeOctet('x');
        writeLong(((byte[]) value).length);
        out.write((byte[]) value);
    } else if (value == null) {
        writeOctet('V');
    } else if (value instanceof List) {
        writeOctet('A');
        writeArray((List<?>) value);
    } else {
        throw new IllegalArgumentException("Invalid value type: " + value.getClass().getName());
    }
}

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From source file:au.org.ala.sds.util.GeneralisedLocation.java

private String round(String number, int decimalPlaces) {
    if (number == null || number.equals("")) {
        return "";
    } else {/*from ww  w  . j  ava2s . c om*/
        BigDecimal bd = new BigDecimal(number);
        if (bd.scale() > decimalPlaces) {
            return String.format("%." + decimalPlaces + "f", bd);
        } else {
            return number;
        }
    }
}

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From source file:org.key2gym.business.services.CashServiceBean.java

/**
 * Validates a money amount.//from  ww  w.j  a v a2 s.c o  m
 * 
 * @param value the amount to validate
 * @throws ValidationException if the amount is invalid
 */
public void validateAmount(BigDecimal value) throws ValidationException {
    if (value == null) {
        throw new NullPointerException("The amount is null."); //NOI18N
    }

    if (value.scale() > 2) {
        throw new ValidationException(getString("Invalid.Money.TwoDigitsAfterDecimalPointMax"));
    }

    value = value.setScale(2);

    if (value.precision() > 6) {
        throw new ValidationException(getString("Invalid.CashAdjustment.LimitReached"));
    }
}

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From source file:jp.terasoluna.fw.validation.ValidationUtil.java

/**
 * ??????????/*w  w w .  j ava  2s .  c  om*/
 * <br>
 * ??????????????
 * <ul>
 * <li>???
 * <ol>
 * <li><code>isAccordedInteger</code>?<code>true</code>???
 * ????<code>integerLength</code>??
 * ????????
 *
 * <li><code>isAccordedInteger</code>?<code>false</code>???
 * ????<code>integerLength</code>?????
 * ??
 * </ol>
 *
 * <li>????
 * <ol>
 * <li><code>isAccordedScale</code>?<code>true</code>???
 * ?????<code>scaleLength</code>??
 * ????????
 *
 * <li><code>isAccordedScale</code>?<code>true</code>???
 * ?????<code>scaleLength</code>?????
 * ??
 * </ol>
 * </ul>
 *
 * @param value 
 * @param integerLength ??
 * @param isAccordedInteger
 *           ??????
 *           <code>true</code>?
 *           ??????
 *           <code>false</code>?
 * @param scaleLength ???
 * @param isAccordedScale
 *           ???????
 *           <code>true</code>?
 *           ???????
 *           <code>false</code>?
 *
 * @return
 *            ????????
 *            <code>true</code>?
 *            ?????<code>false</code>?
 */
public static boolean isNumber(BigDecimal value, int integerLength, boolean isAccordedInteger, int scaleLength,
        boolean isAccordedScale) {

    // ?null??true?
    if (value == null) {
        return true;
    }

    // ??
    // ??
    BigInteger bi = value.toBigInteger().abs();
    // ?
    int length = bi.toString().length();
    if (!checkNumberFigures(length, integerLength, isAccordedInteger)) {
        return false;
    }

    // ???
    int scale = value.scale();
    if (!checkNumberFigures(scale, scaleLength, isAccordedScale)) {
        return false;
    }

    return true;
}

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