DataFile

java.lang.Object
- org.jvnet.mimepull.DataFile

```
final class DataFile
extends java.lang.Object
```
Use RandomAccessFile for concurrent access of read and write partial part's content.

Field Summary

Fields
Modifier and Type Field Description

private WeakDataFile weak

private long writePointer

Constructor Summary

Constructors
Constructor Description

DataFile(java.io.File file)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`(package private) void`	`close()`
`(package private) void`	`read(long pointer, byte[] buf, int offset, int length)`	Read data from the given file pointer position.
`(package private) void`	`renameTo(java.io.File f)`
`(package private) long`	`writeTo(byte[] data, int offset, int length)`	Write data to the file

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

- Field Detail
  - weak
```
private WeakDataFile weak
```
  - writePointer
```
private long writePointer
```
- Constructor Detail
  - DataFile
```
DataFile(java.io.File file)
```
- Method Detail
  - close
```
void close()
```
  - read
```
void read(long pointer,
          byte[] buf,
          int offset,
          int length)
```
    Read data from the given file pointer position.
    
    Parameters:
    
    pointer - read position
    
    buf - that needs to be filled
    
    offset - the start offset of the data.
    
    length - of data that needs to be read
  - renameTo
```
void renameTo(java.io.File f)
```
  - writeTo
```
long writeTo(byte[] data,
             int offset,
             int length)
```
    Write data to the file
    
    Parameters:
    
    data - that needs to written to a file
    
    offset - start offset in the data
    
    length - no bytes to write
    
    Returns:
    
    file pointer before the write operation(or at which the data is written)