Package net.ontopia.utils

Class CollectionMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,Collection<V>>

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

All Implemented Interfaces:

Serializable, Cloneable, Map<K,Collection<V>>

public class CollectionMap<K,V>
extends HashMap<K,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

AbstractMap.SimpleEntry<K extends Object,V extends Object>, AbstractMap.SimpleImmutableEntry<K extends Object,V extends Object>

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K extends Object,V extends Object>

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	drop_empty

Constructor Summary

Constructors

Constructor	Description
CollectionMap()
CollectionMap(boolean drop_empty)

Method Summary

Modifier and Type	Method	Description
void	add(K key, V value)
protected Collection<V>	createCollection()
void	move(V value, K old_key, K new_key)
boolean	remove(Object key, Object value)

Methods inherited from class java.util.HashMap

clear, clone, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, entrySet, forEach, get, getOrDefault, isEmpty, keySet, merge, put, putAll, putIfAbsent, remove, replace, replace, replaceAll, 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 Details

drop_empty

protected boolean drop_empty

Constructor Details

CollectionMap

public CollectionMap()

CollectionMap

public CollectionMap(boolean drop_empty)

Method Details

createCollection

protected Collection<V> createCollection()

add

public void add(K key,
 V value)

remove

public boolean remove(Object key,
 Object value)

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class HashMap<K,Collection<V>>

move

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