org.apache.derby.client.am
Class Decimal

java.lang.Object
  org.apache.derby.client.am.Decimal

public class Decimal
extends java.lang.Object

Converters from fixed point decimal bytes to java.math.BigDecimal, double, or long.

Field Summary

private static MessageUtil	msgutil
static int	PACKED_DECIMAL Packed Decimal representation
private static int[][]	tenRadixMagnitude

Constructor Summary

private

Decimal()

Method Summary

static int	bigDecimalToPackedDecimalBytes(byte[] buffer, int offset, java.math.BigDecimal b, int declaredPrecision, int declaredScale) Write a Java java.math.BigDecimal to packed decimal bytes.
private static int[]	computeMagnitude(int[] input) Compute the int array of magnitude from input value segments.
static java.math.BigDecimal	getBigDecimal(byte[] buffer, int offset, int precision, int scale) Build a java.math.BigDecimal from a fixed point decimal byte representation.
static double	getDouble(byte[] buffer, int offset, int precision, int scale) Build a Java double from a fixed point decimal byte representation.
static long	getLong(byte[] buffer, int offset, int precision, int scale) Build a Java long from a fixed point decimal byte representation.
private static int	packedNybblesToInt(byte[] buffer, int offset, int startNybble, int numberOfNybbles) Convert a range of packed nybbles (up to 9 digits without overflow) to an int.
private static long	packedNybblesToLong(byte[] buffer, int offset, int startNybble, int numberOfNybbles) Convert a range of packed nybbles (up to 18 digits without overflow) to a long.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PACKED_DECIMAL

public static final int PACKED_DECIMAL

Packed Decimal representation

See Also:

Constant Field Values

msgutil

private static final MessageUtil msgutil

tenRadixMagnitude

private static final int[][] tenRadixMagnitude

Constructor Detail

Decimal

private Decimal()

Method Detail

packedNybblesToInt

private static final int packedNybblesToInt(byte[] buffer,
                                            int offset,
                                            int startNybble,
                                            int numberOfNybbles)

Convert a range of packed nybbles (up to 9 digits without overflow) to an int. Note that for performance purpose, it does not do array-out-of-bound checking.

packedNybblesToLong

private static final long packedNybblesToLong(byte[] buffer,
                                              int offset,
                                              int startNybble,
                                              int numberOfNybbles)

Convert a range of packed nybbles (up to 18 digits without overflow) to a long. Note that for performance purpose, it does not do array-out-of-bound checking.

computeMagnitude

private static final int[] computeMagnitude(int[] input)

Compute the int array of magnitude from input value segments.

getBigDecimal

public static final java.math.BigDecimal getBigDecimal(byte[] buffer,
                                                       int offset,
                                                       int precision,
                                                       int scale)
                                                throws java.io.UnsupportedEncodingException

Build a java.math.BigDecimal from a fixed point decimal byte representation.

Throws:

java.lang.IllegalArgumentException - if the specified representation is not recognized.

java.io.UnsupportedEncodingException

getDouble

public static final double getDouble(byte[] buffer,
                                     int offset,
                                     int precision,
                                     int scale)
                              throws java.io.UnsupportedEncodingException

Build a Java double from a fixed point decimal byte representation.

Throws:

java.lang.IllegalArgumentException - if the specified representation is not recognized.

java.io.UnsupportedEncodingException

getLong

public static final long getLong(byte[] buffer,
                                 int offset,
                                 int precision,
                                 int scale)
                          throws java.io.UnsupportedEncodingException

Build a Java long from a fixed point decimal byte representation.

Throws:

java.lang.IllegalArgumentException - if the specified representation is not recognized.

java.lang.ArithmeticException - if value is too large for a long

java.io.UnsupportedEncodingException

bigDecimalToPackedDecimalBytes

public static final int bigDecimalToPackedDecimalBytes(byte[] buffer,
                                                       int offset,
                                                       java.math.BigDecimal b,
                                                       int declaredPrecision,
                                                       int declaredScale)
                                                throws SqlException

Write a Java java.math.BigDecimal to packed decimal bytes.

Throws:

SqlException