HFileBlockDefaultDecodingContext (Apache HBase 1.2.12 API)

java.lang.Object
- org.apache.hadoop.hbase.io.encoding.HFileBlockDefaultDecodingContext

All Implemented Interfaces:

HFileBlockDecodingContext
```
@InterfaceAudience.Private
public class HFileBlockDefaultDecodingContext
extends Object
implements HFileBlockDecodingContext
```
A default implementation of HFileBlockDecodingContext. It assumes the block data section is compressed as a whole.

See Also:
for the default compression context

Field Summary

Fields
Modifier and Type Field and Description

private HFileContext fileContext

private TagCompressionContext tagCompressionContext

Fields
Modifier and Type	Field and Description
`private HFileContext`	`fileContext`
`private TagCompressionContext`	`tagCompressionContext`

Constructor Summary

Constructors
Constructor and Description

HFileBlockDefaultDecodingContext(HFileContext fileContext)

Constructors
Constructor and Description
`HFileBlockDefaultDecodingContext(HFileContext fileContext)`

Method Summary

Methods
Modifier and Type	Method and Description
`HFileContext`	`getHFileContext()`
`TagCompressionContext`	`getTagCompressionContext()`
`void`	`prepareDecoding(int onDiskSizeWithoutHeader, int uncompressedSizeWithoutHeader, ByteBuffer blockBufferWithoutHeader, ByteBuffer onDiskBlock)` Perform all actions that need to be done before the encoder's real decoding process.
`void`	`setTagCompressionContext(TagCompressionContext tagCompressionContext)`

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

- Field Detail
  - fileContext
```
private final HFileContext fileContext
```
  - tagCompressionContext
```
private TagCompressionContext tagCompressionContext
```
- Constructor Detail
  - HFileBlockDefaultDecodingContext
```
public HFileBlockDefaultDecodingContext(HFileContext fileContext)
```
- Method Detail
  - prepareDecoding
```
public void prepareDecoding(int onDiskSizeWithoutHeader,
                   int uncompressedSizeWithoutHeader,
                   ByteBuffer blockBufferWithoutHeader,
                   ByteBuffer onDiskBlock)
                     throws IOException
```
    Description copied from interface: HFileBlockDecodingContext
    
    Perform all actions that need to be done before the encoder's real decoding process. Decompression needs to be done if HFileContext.getCompression() returns a valid compression algorithm.
    
    Specified by:
    
    prepareDecoding in interface HFileBlockDecodingContext
    
    Parameters:
    onDiskSizeWithoutHeader - numBytes after block and encoding headers
    uncompressedSizeWithoutHeader - numBytes without header required to store the block after decompressing (not decoding)
    blockBufferWithoutHeader - ByteBuffer pointed after the header but before the data
    onDiskBlock - on disk data to be decoded
    
    Throws:
    
    IOException
  - getHFileContext
```
public HFileContext getHFileContext()
```
    Specified by:
    
    getHFileContext in interface HFileBlockDecodingContext
    
    Returns:
    HFile meta information
  - getTagCompressionContext
```
public TagCompressionContext getTagCompressionContext()
```
  - setTagCompressionContext
```
public void setTagCompressionContext(TagCompressionContext tagCompressionContext)
```

Class HFileBlockDefaultDecodingContext

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

fileContext

tagCompressionContext

Constructor Detail

HFileBlockDefaultDecodingContext

Method Detail

prepareDecoding

getHFileContext

getTagCompressionContext

setTagCompressionContext