BlockAccessBase (Apache Jena - DBOE Base 4.2.0)

java.lang.Object
- org.apache.jena.dboe.base.file.BlockAccessBase

All Implemented Interfaces:

org.apache.jena.atlas.lib.Closeable, org.apache.jena.atlas.lib.Sync, BlockAccess

Direct Known Subclasses:

BlockAccessDirect, BlockAccessMapped
```
public abstract class BlockAccessBase
extends java.lang.Object
implements BlockAccess
```
Support for a disk file backed FileAccess

Constructor Summary

Constructors
Constructor Description

BlockAccessBase(java.lang.String filename, int blockSize)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`allocBoundary()`
`void`	`close()`
`java.lang.String`	`getLabel()`
`boolean`	`isClosed()`
`boolean`	`isEmpty()`
`void`	`resetAllocBoundary(long boundary)`	Reset the allocation space (i.e.
`boolean`	`valid(long id)`

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

Methods inherited from interface org.apache.jena.dboe.base.file.BlockAccess
allocate, overwrite, read, write

Methods inherited from interface org.apache.jena.atlas.lib.Sync
sync

- Constructor Detail
  - BlockAccessBase
```
public BlockAccessBase(java.lang.String filename,
                       int blockSize)
```
- Method Detail
  - isEmpty
```
public final boolean isEmpty()
```
    Specified by:
    
    isEmpty in interface BlockAccess
  - allocBoundary
```
public final long allocBoundary()
```
    Specified by:
    
    allocBoundary in interface BlockAccess
  - resetAllocBoundary
```
public final void resetAllocBoundary(long boundary)
```
    Description copied from interface: BlockAccess
    
    Reset the allocation space (i.e. truncate). The boundary should be a number obtained from a previous call of allocLimit. It can not be greater than the current allocation boundary.
    
    Specified by:
    
    resetAllocBoundary in interface BlockAccess
  - valid
```
public final boolean valid(long id)
```
    Specified by:
    
    valid in interface BlockAccess
  - isClosed
```
public final boolean isClosed()
```
  - close
```
public final void close()
```
    Specified by:
    
    close in interface org.apache.jena.atlas.lib.Closeable
  - getLabel
```
public java.lang.String getLabel()
```
    Specified by:
    
    getLabel in interface BlockAccess