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org.apache.derby.client.am
Class FloatingPoint  

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

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public class FloatingPoint

extends java.lang.Object

Converters from floating point bytes to Java float, double, or java.math.BigDecimal.

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Field Summary
static int	IEEE_754_FLOATING_POINT           Supported Unix Big Endian IEEE 754 floating point representation.

 

Constructor Summary
private	FloatingPoint()

 

Method Summary
private static int	convertFromByteToInt(byte[] buffer, int offset)           Convert the byte array to an int.
private static long	convertFromByteToLong(byte[] buffer, int offset)           Convert the byte array to a long.
static void	doubleToIeee754Bytes(byte[] buffer, int offset, double d)           Write a Java double to an 8-byte double precision floating point representation.
static void	floatToIeee754Bytes(byte[] buffer, int offset, float f)           Write a Java float to a 4-byte floating point representation.
static double	getDouble(byte[] buffer, int offset)           Build a Java double from an 8-byte floating point representation.
static float	getFloat(byte[] buffer, int offset)           Build a Java float from a 4-byte floating point representation.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

IEEE_754_FLOATING_POINT

public static final int IEEE_754_FLOATING_POINT

Supported Unix Big Endian IEEE 754 floating point representation.

See Also:

Constant Field Values

Constructor Detail

FloatingPoint

private FloatingPoint()

Method Detail

convertFromByteToInt

private static final int convertFromByteToInt(byte[] buffer,
                                              int offset)

Convert the byte array to an int.

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convertFromByteToLong

private static final long convertFromByteToLong(byte[] buffer,
                                                int offset)

Convert the byte array to a long.

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getFloat

public static final float getFloat(byte[] buffer,
                                   int offset)

Build a Java float from a 4-byte floating point representation.

This includes DERBY types:

• REAL
• FLOAT(1<=n<=24)

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getDouble

public static final double getDouble(byte[] buffer,
                                     int offset)

Build a Java double from an 8-byte floating point representation.

This includes DERBY types:

• FLOAT
• DOUBLE [PRECISION]

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floatToIeee754Bytes

public static final void floatToIeee754Bytes(byte[] buffer,
                                             int offset,
                                             float f)

Write a Java float to a 4-byte floating point representation.

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doubleToIeee754Bytes

public static final void doubleToIeee754Bytes(byte[] buffer,
                                              int offset,
                                              double d)

Write a Java double to an 8-byte double precision floating point representation.

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