Data (Hazelcast Root 3.4 API)

```
public interface Data
```
Data is basic unit of serialization. It stores binary form of an object serialized by SerializationService.toData(Object).

Method Summary

Methods
Modifier and Type	Method and Description
`int`	`dataSize()` Returns size of binary data
`byte[]`	`getData()` Returns byte array representation of internal binary format.
`byte[]`	`getHeader()` Returns byte array representation of header.
`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.
`boolean`	`hasPartitionHash()` Returns true if Data has partition hash, false otherwise.
`int`	`headerSize()` Returns size of header.
`boolean`	`isPortable()` Returns true if this Data is created from a `Portable` object, false otherwise.
`int`	`readIntHeader(int offset, ByteOrder order)` Reads an integer header from given offset using given `ByteOrder`.

- Method Detail
  - getData
```
byte[] getData()
```
    Returns byte array representation of internal binary format.
    
    Returns:
    binary data
  - getType
```
int getType()
```
    Returns serialization type of binary form. It's defined by Serializer.getTypeId()
    
    Returns:
    serializer type id
  - dataSize
```
int dataSize()
```
    Returns size of binary data
    
    Returns:
    data size
  - getHeapCost
```
int getHeapCost()
```
    Returns approximate heap cost of this Data object in bytes.
    
    Returns:
    approximate heap cost
  - getPartitionHash
```
int getPartitionHash()
```
    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.
    
    Returns:
    partition hash
    See Also:
    PartitionAware, PartitioningStrategy, SerializationService.toData(Object, com.hazelcast.core.PartitioningStrategy)
  - hasPartitionHash
```
boolean hasPartitionHash()
```
    Returns true if Data has partition hash, false otherwise.
    
    Returns:
    true if Data has partition hash, false otherwise.
  - hash64
```
long hash64()
```
    Returns 64-bit hash code for this Data object.
    
    Returns:
    64-bit hash code
  - isPortable
```
boolean isPortable()
```
    Returns true if this Data is created from a Portable object, false otherwise.
    
    Returns:
    true if source object is Portable, false otherwise.
  - getHeader
```
byte[] getHeader()
```
    Returns byte array representation of header. Header is used to store Portable metadata during serialization and consists of factoryId, classId and version for each Portable field that source object contains.
    
    Returns:
    header
  - headerSize
```
int headerSize()
```
    Returns size of header.
    
    Returns:
    size of header
  - readIntHeader
```
int readIntHeader(int offset,
                ByteOrder order)
```
    Reads an integer header from given offset using given ByteOrder.
    
    Parameters:
    offset - offset of integer header
    order - byte order
    
    Returns:
    integer header

Interface Data

Method Summary

Method Detail

getData

getType

dataSize

getHeapCost

getPartitionHash

hasPartitionHash

hash64

isPortable

getHeader

headerSize

readIntHeader