InMemoryIdMapping SourceCode GPL - https://github.com/iboxdb/db4o-gpl

java.lang.Object
- com.db4o.defragment.AbstractIdMapping
- - com.db4o.defragment.InMemoryIdMapping

All Implemented Interfaces:

IdMapping
```
public class InMemoryIdMapping
extends AbstractIdMapping
```
In-memory mapping for IDs during a defragmentation run. This is faster than the DatabaseIdMapping but it uses more memory. If you have OutOfMemory conditions with this id mapping, use the DatabaseIdMapping instead.

See Also:

Defragment

Constructor Summary

Constructors
Constructor Description

InMemoryIdMapping()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`addressForId(int id)`	returns the slot address for an ID
`void`	`close()`	Shuts down the mapping after use.
`void`	`commit()`
`void`	`mapId(int id, Slot slot)`	Maps an ID to a slot
`protected void`	`mapNonClassIDs(int origID, int mappedID)`
`int`	`mappedId(int oldID)`	Returns a previously registered mapping ID for the given ID if it exists.
`void`	`open()`	Prepares the mapping for use.
`Visitable<SlotChange>`	`slotChanges()`	provides a Visitable of all mappings of IDs to slots.

Methods inherited from class com.db4o.defragment.AbstractIdMapping
mapId, mappedClassID

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

- Constructor Detail
  - InMemoryIdMapping
```
public InMemoryIdMapping()
```
- Method Detail
  - mappedId
```
public int mappedId(int oldID)
```
    Description copied from interface: IdMapping
    
    Returns a previously registered mapping ID for the given ID if it exists.
    
    Returns:
    
    The mapping ID for the given original ID or 0, if none has been registered.
  - open
```
public void open()
```
    Description copied from interface: IdMapping
    
    Prepares the mapping for use.
  - close
```
public void close()
```
    Description copied from interface: IdMapping
    
    Shuts down the mapping after use.
  - mapNonClassIDs
```
protected void mapNonClassIDs(int origID,
                              int mappedID)
```
    Specified by:
    
    mapNonClassIDs in class AbstractIdMapping
  - addressForId
```
public int addressForId(int id)
```
    Description copied from interface: IdMapping
    
    returns the slot address for an ID
  - mapId
```
public void mapId(int id,
                  Slot slot)
```
    Description copied from interface: IdMapping
    
    Maps an ID to a slot
  - slotChanges
```
public Visitable<SlotChange> slotChanges()
```
    Description copied from interface: IdMapping
    
    provides a Visitable of all mappings of IDs to slots.
  - commit
```
public void commit()
```