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

Fields

Modifier and Type	Field and Description
private static MessageUtil	msgutil
static int	PACKED_DECIMAL Packed Decimal representation
private static int[][]	tenRadixMagnitude

Constructor Summary

Constructors

Modifier	Constructor and Description
private	Decimal()

Method Summary

Modifier and Type	Method and Description
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