FreeListBlock - Javadocs [I2P+ 0.9.50]

java.lang.Object

net.metanotion.io.block.FreeListBlock

class FreeListBlock
extends Object

On-disk format:

    Magic number (long)
    next freelist block page (unsigned int)
    size (unsigned int)
    that many free pages (unsigned ints)

Always fits on one page. Free page format:

    Magic number (long)

Field Summary

Fields

Modifier and Type Field Description

int page
Constructor Summary

Constructors

Constructor Description

FreeListBlock(RandomAccessInterface file, int startPage)

Method Summary

Modifier and Type	Method	Description
`void`	`addPage(int freePage)`	Adds free page and writes new len to disk
`boolean`	`flbck(boolean fix)`	Recursive.
`int`	`getNextPage()`
`static void`	`initPage(RandomAccessInterface file, int page)`
`boolean`	`isEmpty()`
`boolean`	`isFull()`
`void`	`setNextPage(int nxt)`	Set and write the next page only
`int`	`takePage()`	Takes next page and writes new len to disk
`String`	`toString()`
`void`	`writeBlock()`

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details
- page
  
  public final int page
Constructor Details
- FreeListBlock
  
  public FreeListBlock(RandomAccessInterface file, int startPage) throws IOException
  
  Throws:
  
  IOException
Method Details
- writeBlock
  
  public void writeBlock() throws IOException
  
  Throws:
  
  IOException
- getNextPage
  
  public int getNextPage()
- setNextPage
  
  public void setNextPage(int nxt) throws IOException
  
  Set and write the next page only
  
  Throws:
  
  IOException
- isEmpty
  
  public boolean isEmpty()
- isFull
  
  public boolean isFull()
- addPage
  
  public void addPage(int freePage) throws IOException
  
  Adds free page and writes new len to disk
  
  Throws:
  
  IllegalStateException - if full
  
  IOException
- takePage
  
  public int takePage() throws IOException
  
  Takes next page and writes new len to disk
  
  Throws:
  
  IllegalStateException - if empty
  
  IOException
- initPage
  
  public static void initPage(RandomAccessInterface file, int page) throws IOException
  
  Throws:
  
  IOException
- flbck
  
  public boolean flbck(boolean fix) throws IOException
  
  Recursive.
  
  Throws:
  
  IOException
  
  Since:
  
  0.9.7
- toString
  
  public String toString()
  
  Overrides:
  
  toString in class Object