org.postgresql.pljava.internal
Class TransactionalMap

java.lang.Object
  java.util.AbstractMap
      java.util.HashMap
          org.postgresql.pljava.internal.TransactionalMap

All Implemented Interfaces:

Serializable, Cloneable, Map

public class TransactionalMap
extends HashMap

A TransactionalMap acts as a modifiable front for a backing map. All modifications can be reverted by a call to abort or propagated to the backing map by a call to commit. The map is not synchronized so care should be taken if multiple threads will access the map.

Author:

Thomas Hallgren

See Also:

Serialized Form

Nested Class Summary

protected class	TransactionalMap.BackedEntry
protected class	TransactionalMap.EntryIterator
protected class	TransactionalMap.KeyIterator
protected class	TransactionalMap.ValueIterator

Constructor Summary

protected

TransactionalMap(Map base)

Method Summary

void	abort() Undo all changes made since the map was created or since last commit or abort.
void	clear() Clear this map (an anti-object is inserted for each entry present in the backed map).
void	commit() Commit all changes made since the map was created or since last commit or abort.
boolean	containsKey(Object key)
boolean	containsValue(Object val)
Set	entrySet()
Object	get(Object key)
protected Iterator	getEntryIterator()
protected Iterator	getKeyIterator()
protected Iterator	getValueIterator()
boolean	isEmpty()
Set	keySet()
Object	put(Object key, Object value)
void	putAll(Map t)
Object	remove(Object key)
int	size()
Collection	values()

Methods inherited from class java.util.HashMap

clone

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Constructor Detail

TransactionalMap

protected TransactionalMap(Map base)

Method Detail

abort

public void abort()

Undo all changes made since the map was created or since last commit or abort.

clear

public void clear()

Clear this map (an anti-object is inserted for each entry present in the backed map).

Specified by:

clear in interface Map

Overrides:

clear in class HashMap

commit

public void commit()

Commit all changes made since the map was created or since last commit or abort. All changes are propagated to the backing map.

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map

Overrides:

containsKey in class HashMap

get

public Object get(Object key)

Specified by:

get in interface Map

Overrides:

get in class HashMap

remove

public Object remove(Object key)

Specified by:

remove in interface Map

Overrides:

remove in class HashMap

size

public int size()

Specified by:

size in interface Map

Overrides:

size in class HashMap

containsValue

public boolean containsValue(Object val)

Specified by:

containsValue in interface Map

Overrides:

containsValue in class HashMap

entrySet

public Set entrySet()

Specified by:

entrySet in interface Map

Overrides:

entrySet in class HashMap

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map

Overrides:

isEmpty in class HashMap

keySet

public Set keySet()

Specified by:

keySet in interface Map

Overrides:

keySet in class HashMap

put

public Object put(Object key,
                  Object value)

Specified by:

put in interface Map

Overrides:

put in class HashMap

putAll

public void putAll(Map t)

Specified by:

putAll in interface Map

Overrides:

putAll in class HashMap

values

public Collection values()

Specified by:

values in interface Map

Overrides:

values in class HashMap

getEntryIterator

protected Iterator getEntryIterator()

getKeyIterator

protected Iterator getKeyIterator()

getValueIterator

protected Iterator getValueIterator()