ByteBuffer (Apache SystemDS 3.3.0 API)

java.lang.Object
- org.apache.sysds.runtime.controlprogram.caching.ByteBuffer

```
public class ByteBuffer
extends Object
```
Wrapper for WriteBuffer byte array per matrix/frame in order to support matrix/frame serialization outside global lock.

Constructor Summary

Constructors
Constructor Description

ByteBuffer(long size)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`checkSerialized()`
`CacheBlock<?>`	`deserializeBlock()`
`void`	`evictBuffer(String fname)`
`void`	`freeMemory()`
`long`	`getSize()`	Returns the buffer size in bytes.
`boolean`	`isShallow()`
`static boolean`	`isValidCapacity(long size, CacheBlock<?> cb)`	Determines if byte buffer can hold the given size given this specific cache block.
`void`	`serializeBlock(CacheBlock<?> cb)`

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

Constructor Detail
- ByteBuffer
```
public ByteBuffer(long size)
```

Method Detail
- serializeBlock
```
public void serializeBlock(CacheBlock<?> cb)
```
- deserializeBlock
```
public CacheBlock<?> deserializeBlock()
                               throws IOException
```
  Throws:
  
  IOException
- evictBuffer
```
public void evictBuffer(String fname)
                 throws IOException
```
  Throws:
  
  IOException
- getSize
```
public long getSize()
```
  Returns the buffer size in bytes.
  
  Returns:
  
  buffer size in bytes
- isShallow
```
public boolean isShallow()
```
- freeMemory
```
public void freeMemory()
```
- checkSerialized
```
public void checkSerialized()
```
- isValidCapacity
```
public static boolean isValidCapacity(long size,
                                      CacheBlock<?> cb)
```
  Determines if byte buffer can hold the given size given this specific cache block. This call is consistent with 'serializeBlock' and allows for internal optimization according to dense/sparse representation.
  
  Parameters:
  
  size - the size
  
  cb - cache block
  
  Returns:
  
  true if valid capacity