zserio.runtime.array

Class DeltaContext

java.lang.Object

zserio.runtime.array.PackingContext

zserio.runtime.array.DeltaContext

public final class DeltaContext
extends PackingContext

Context for delta packing created for each packable field. Contexts are always newly created for each array operation (bitSizeOfPacked, initializeOffsetsPacked, readPacked, writePacked). They must be initialized at first via calling the init method for each packable element present in the array. After the full initialization, only a single method (bitSizeOf, read, write) can be repeatedly called for exactly the same sequence of packable elements.

Constructor Summary

Constructors

Constructor and Description
DeltaContext()

Method Summary

Modifier and Type	Method and Description
int	bitSizeOf(ArrayTraits.IntegralArrayTraits arrayTraits, ArrayElement.IntegralArrayElement element) Returns length of the packed element stored in the bit stream in bits.
void	init(ArrayTraits.IntegralArrayTraits arrayTraits, ArrayElement.IntegralArrayElement element) Calls the initialization step for a single element.
ArrayElement.IntegralArrayElement	read(ArrayTraits.IntegralArrayTraits arrayTraits, BitStreamReader reader) Reads a packed element from the bit stream.
void	write(ArrayTraits.IntegralArrayTraits arrayTraits, BitStreamWriter writer, ArrayElement.IntegralArrayElement element) Writes the packed element to the bit stream.

Methods inherited from class zserio.runtime.array.PackingContext

cast

Methods inherited from class java.lang.Object

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

Constructor Detail

DeltaContext

public DeltaContext()

Method Detail

init

public void init(ArrayTraits.IntegralArrayTraits arrayTraits,
                 ArrayElement.IntegralArrayElement element)

Calls the initialization step for a single element.

Parameters:

arrayTraits - Standard array traits.

element - Current element.

bitSizeOf

public int bitSizeOf(ArrayTraits.IntegralArrayTraits arrayTraits,
                     ArrayElement.IntegralArrayElement element)

Returns length of the packed element stored in the bit stream in bits.

Parameters:

arrayTraits - Standard array traits.

element - Value of the current element.

Returns:

Length of the packed element stored in the bit stream in bits.

read

public ArrayElement.IntegralArrayElement read(ArrayTraits.IntegralArrayTraits arrayTraits,
                                              BitStreamReader reader)
                                       throws java.io.IOException

Reads a packed element from the bit stream.

Parameters:

arrayTraits - Standard array traits.

reader - Bit stream reader.

Returns:

Packed element.

Throws:

java.io.IOException - Failure during bit stream manipulation.

write

public void write(ArrayTraits.IntegralArrayTraits arrayTraits,
                  BitStreamWriter writer,
                  ArrayElement.IntegralArrayElement element)
           throws java.io.IOException

Writes the packed element to the bit stream.

Parameters:

arrayTraits - Standard array traits.

writer - Bit stream writer.

element - Current element.

Throws:

java.io.IOException - Failure during bit stream manipulation.