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

All Known Implementing Classes:

AbstractIdMapping, DatabaseIdMapping, InMemoryIdMapping
```
public interface IdMapping
```
The ID mapping used internally during a defragmentation run.

See Also:

Defragment

Method Summary

All Methods Instance Methods Abstract 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 origId, int mappedId, boolean isClassId)`	Registers a mapping for the given IDs.
`void`	`mapId(int id, Slot slot)`	Maps an ID to a slot
`int`	`mappedId(int origId)`	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.

- Method Detail
  - mappedId
```
int mappedId(int origId)
```
    Returns a previously registered mapping ID for the given ID if it exists.
    
    Parameters:
    
    origID - The original ID
    
    Returns:
    
    The mapping ID for the given original ID or 0, if none has been registered.
  - mapId
```
void mapId(int origId,
           int mappedId,
           boolean isClassId)
```
    Registers a mapping for the given IDs.
    
    Parameters:
    
    origID - The original ID
    
    mappedID - The ID to be mapped to the original ID.
    
    isClassID - true if the given original ID specifies a class slot, false otherwise.
  - mapId
```
void mapId(int id,
           Slot slot)
```
    Maps an ID to a slot
    
    Parameters:
    
    id -
    
    slot -
  - slotChanges
```
Visitable<SlotChange> slotChanges()
```
    provides a Visitable of all mappings of IDs to slots.
  - open
```
void open()
   throws java.io.IOException
```
    Prepares the mapping for use.
    
    Throws:
    
    java.io.IOException
  - close
```
void close()
```
    Shuts down the mapping after use.
  - addressForId
```
int addressForId(int id)
```
    returns the slot address for an ID
  - commit
```
void commit()
```