Data (Hazelcast Root 3.9 API)

All Known Implementing Classes:

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

Method Summary

All Methods Instance Methods Abstract Methods
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
`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.
`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.
`int`	`totalSize()` Returns the total size of Data in bytes.

- Method Detail
  - toByteArray
```
byte[] toByteArray()
```
    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
  - totalSize
```
int totalSize()
```
    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.
    
    Returns:
    
    total size
  - copyTo
```
void copyTo(byte[] dest,
            int destPos)
```
    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 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.
    
    Parameters:
    
    dest - to byte-buffer to write to
    
    destPos - the position in the destination buffer.
  - dataSize
```
int dataSize()
```
    Returns size of internal binary data in bytes
    
    Returns:
    
    internal 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.

Interface Data

Method Summary

Method Detail

toByteArray

getType

totalSize

copyTo

dataSize

getHeapCost

getPartitionHash

hasPartitionHash

hash64

isPortable