net.ontopia.utils
Class CollectionMap<K,V>

java.lang.Object
  java.util.AbstractMap<K,V>
      java.util.HashMap<K,java.util.Collection<V>>
          net.ontopia.utils.CollectionMap<K,V>

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.Map<K,java.util.Collection<V>>

public class CollectionMap<K,V>
extends java.util.HashMap<K,java.util.Collection<V>>

INTERNAL: A map which stores entries containing Collection values. Any object can be used as key. The add(key,value) and remove(key,value) makes sure that the Collection values are updated correctly.

The maintained index must only contain values implementing the Collection interface. The data structure looks like this: {key: [value, value, ...], key: [value, ...]}

Empty entries are removed by default.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V>

Field Summary

protected boolean

drop_empty

Constructor Summary

CollectionMap()

CollectionMap(boolean drop_empty)

Method Summary

void	add(K key, V value)
protected java.util.Collection<V>	createCollection()
void	move(V value, K old_key, K new_key)
void	remove(K key, V value)

Methods inherited from class java.util.HashMap

clear, clone, containsKey, containsValue, entrySet, get, isEmpty, keySet, put, putAll, remove, size, values

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

Field Detail

drop_empty

protected boolean drop_empty

Constructor Detail

CollectionMap

public CollectionMap()

CollectionMap

public CollectionMap(boolean drop_empty)

Method Detail

createCollection

protected java.util.Collection<V> createCollection()

add

public void add(K key,
                V value)

remove

public void remove(K key,
                   V value)

move

public void move(V value,
                 K old_key,
                 K new_key)