BufferFileBlock

java.lang.Object
- db.buffers.BufferFileBlock

```
public class BufferFileBlock
extends java.lang.Object
```
BufferFileBlock is used to hold BufferFile blocks for use during block streaming operations.
Block indexes are absolute where 0 corresponds to the head block in the BufferFile. It is important to note that this number is off by 1 from DataBuffer numbering and the index values utilized by BufferFile.getIndexCount(), BufferFile.get(DataBuffer, int), BufferFile.put(DataBuffer, int), etc.. It is important for each implementation to normalize to absolute block indexes.

Constructor Summary

Constructors
Constructor	Description
`BufferFileBlock(byte[] bytes)`	BufferFileBlock constructor for use when reconstructing instance from block stream
`BufferFileBlock(int blockIndex, byte[] buffer)`	BufferFileBlock constructor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`byte[]`	`getData()`	Get block data buffer
`int`	`getIndex()`	Get absolute block index, where 0 corresponds to the first physical block within the buffer file.
`int`	`size()`	Get block size
`byte[]`	`toBytes()`	Get block as byte array suitable for use in block stream and reconstruction.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - BufferFileBlock
```
public BufferFileBlock(int blockIndex,
                       byte[] buffer)
```
    BufferFileBlock constructor
    
    Parameters:
    
    blockIndex - block index
    
    buffer - block buffer (size must match block-size for associated buffer file)
  - BufferFileBlock
```
public BufferFileBlock(byte[] bytes)
```
    BufferFileBlock constructor for use when reconstructing instance from block stream
    
    Parameters:
    
    bytes - buffer data received from block stream. Buffer index will be determined by first 4-bytes contained within the bytes array (big-endian).
- Method Detail
  - size
```
public int size()
```
    Get block size
    
    Returns:
    
    block size
  - getIndex
```
public int getIndex()
```
    Get absolute block index, where 0 corresponds to the first physical block within the buffer file.
    
    Returns:
    
    block index
  - getData
```
public byte[] getData()
```
    Get block data buffer
    
    Returns:
    
    block data buffer
  - toBytes
```
public byte[] toBytes()
```
    Get block as byte array suitable for use in block stream and reconstruction.
    
    Returns:
    
    block as byte array