Package com._1c.g5.v8.bm.common.serialization

Class SerializationUtil

java.lang.Object

com._1c.g5.v8.bm.common.serialization.SerializationUtil

public final class SerializationUtil
extends Object

Serialization utilities.

Method Summary

Modifier and Type	Method	Description
static void	packInt(int value, DataOutput out)	Packs the specified int value and writes it to the provided output.
static void	packLong(long value, DataOutput out)	Packs the specified long value and writes it to the provided output.
static int	unpackInt(DataInput in)	Reads and unpacks an int value.
static long	unpackLong(DataInput in)	Reads and unpacks an long value.

Methods inherited from class java.lang.Object

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

Method Details

packInt

public static void packInt(int value,
 DataOutput out)
                    throws IOException

Packs the specified int value and writes it to the provided output.

The more leading zeroes in the two's complement binary representation the value has the less bytes its packed representation requires. Thus this method may be inefficient if there are lots of positive numbers greater than or equal to 2²⁸ or lots of any negative numbers whose packed representation requires 5 bytes. In this case use DataOutput.writeInt(int) method.

In case there are lots of both positive and negative numbers with low absolute values consider applying ZigZag encoding before packing.

This method has been borrowed from MapDB but originally comes from Kryo Framework, author Nathan Sweet. It was modified to fit MapDB needs.

Parameters:

value - The value to pack and write.

out - The output to write the packed value to.

Throws:

IOException - in case an I/O error occurs.

unpackInt

public static int unpackInt(DataInput in)
                     throws IOException

Reads and unpacks an int value.

This method has been borrowed from MapDB but originally comes from Kryo Framework, author Nathan Sweet. It was modified to fit MapDB needs.

Parameters:

in - The input to read the packed value from.

Returns:

the read and unpacked value.

Throws:

IOException - in case an I/O error occurs.

packLong

public static void packLong(long value,
 DataOutput out)
                     throws IOException

Packs the specified long value and writes it to the provided output.

The more leading zeroes in the two's complement binary representation the value has the less bytes its packed representation requires. Thus this method may be inefficient if there are lots of positive numbers greater than or equal to 2⁵⁶ whose packed representation requires at least 9 bytes or lots of any negative numbers whose packed representation requires 10 bytes. In this case use DataOutput.writeLong(long) method.

In case there are lots of both positive and negative numbers with low absolute values consider applying ZigZag encoding before packing.

This method has been borrowed from MapDB but originally comes from Kryo Framework, author Nathan Sweet. It was modified to fit MapDB needs.

Parameters:

value - The value to pack and write.

out - The output to write the packed value to.

Throws:

IOException - in case an I/O error occurs.

unpackLong

public static long unpackLong(DataInput in)
                       throws IOException

Reads and unpacks an long value.

This method has been borrowed from MapDB but originally comes from Kryo Framework, author Nathan Sweet. It was modified to fit MapDB needs.

Parameters:

in - The input to read the packed value from.

Returns:

the read and unpacked value.

Throws:

IOException - in case an I/O error occurs.