com.hazelcast.internal.serialization.impl

Class HeapData

java.lang.Object

com.hazelcast.internal.serialization.impl.HeapData

All Implemented Interfaces:

Data

Direct Known Subclasses:

Packet

public class HeapData
extends Object
implements Data

A Data implementation where the content lives on the heap.

Field Summary

Fields

Modifier and Type	Field and Description
static int	DATA_OFFSET
static int	HEAP_DATA_OVERHEAD
static int	PARTITION_HASH_OFFSET
protected byte[]	payload
static int	TYPE_OFFSET

Constructor Summary

Constructors

Constructor and Description
HeapData()
HeapData(byte[] payload)

Method Summary

Modifier and Type	Method and Description
void	copyTo(byte[] dest, int destPos) Copies the payload contained in the Data to the destination buffer.
int	dataSize() Returns size of internal binary data in bytes
boolean	equals(Object o)
int	getHeapCost() Returns approximate heap cost of this Data object in bytes.
int	getPartitionHash() Returns partition hash calculated for serialized object.
int	getType() Returns serialization type of binary form.
long	hash64() Returns 64-bit hash code for this Data object.
int	hashCode()
boolean	hasPartitionHash() Returns true if Data has partition hash, false otherwise.
boolean	isPortable() Returns true if this Data is created from a Portable object, false otherwise.
byte[]	toByteArray() Returns byte array representation of internal binary format.
String	toString()
int	totalSize() Returns the total size of Data in bytes.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

PARTITION_HASH_OFFSET

public static final int PARTITION_HASH_OFFSET

See Also:

Constant Field Values

TYPE_OFFSET

public static final int TYPE_OFFSET

See Also:

Constant Field Values

DATA_OFFSET

public static final int DATA_OFFSET

See Also:

Constant Field Values

HEAP_DATA_OVERHEAD

public static final int HEAP_DATA_OVERHEAD

See Also:

Constant Field Values

payload

protected byte[] payload

Constructor Detail

HeapData

public HeapData()

HeapData

public HeapData(byte[] payload)

Method Detail

dataSize

public int dataSize()

Description copied from interface: Data

Returns size of internal binary data in bytes

Specified by:

dataSize in interface Data

Returns:

internal data size

totalSize

public int totalSize()

Description copied from interface: Data

Returns the total size of Data in bytes. The total size is the size of a byte array to contain the full content of this data object. For example in case of an HeapData object, the total size will be the length of the payload.

Specified by:

totalSize in interface Data

Returns:

total size

copyTo

public void copyTo(byte[] dest,
                   int destPos)

Description copied from interface: Data

Copies the payload contained in the Data to the destination buffer. The dest byte-buffer needs to be large enough to contain the payload. Otherwise an exception is thrown. The reason this method exists instead of relying on the Data.toByteArray() is the existence of the NativeMemoryData. With the NativeMemoryData it would lead to a temporary byte-array. This method prevents this temporary byte-array needing to be created.

Specified by:

copyTo in interface Data

Parameters:

dest - to byte-buffer to write to

destPos - the position in the destination buffer.

getPartitionHash

public int getPartitionHash()

Description copied from interface: Data

Returns partition hash calculated for serialized object. Partition hash is used to determine partition of a Data and is calculated using PartitioningStrategy during serialization.

If partition hash is not set then standard hashCode() is used.

Specified by:

getPartitionHash in interface Data

Returns:

partition hash

See Also:

PartitionAware, PartitioningStrategy, SerializationService.toData(Object, com.hazelcast.core.PartitioningStrategy)

hasPartitionHash

public boolean hasPartitionHash()

Description copied from interface: Data

Returns true if Data has partition hash, false otherwise.

Specified by:

hasPartitionHash in interface Data

Returns:

true if Data has partition hash, false otherwise.

toByteArray

public byte[] toByteArray()

Description copied from interface: Data

Returns byte array representation of internal binary format.

Specified by:

toByteArray in interface Data

Returns:

binary data

getType

public int getType()

Description copied from interface: Data

Returns serialization type of binary form. It's defined by Serializer.getTypeId()

Specified by:

getType in interface Data

Returns:

serializer type ID

getHeapCost

public int getHeapCost()

Description copied from interface: Data

Returns approximate heap cost of this Data object in bytes.

Specified by:

getHeapCost in interface Data

Returns:

approximate heap cost

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

hash64

public long hash64()

Description copied from interface: Data

Returns 64-bit hash code for this Data object.

Specified by:

hash64 in interface Data

Returns:

64-bit hash code

isPortable

public boolean isPortable()

Description copied from interface: Data

Returns true if this Data is created from a Portable object, false otherwise.

Specified by:

isPortable in interface Data

Returns:

true if source object is Portable, false otherwise.

toString

public String toString()

Overrides:

toString in class Object