Class ArrayListValuedHashMap<K,V>
java.lang.Object
org.apache.commons.collections4.multimap.AbstractMultiValuedMap<K,V>
org.apache.commons.collections4.multimap.AbstractListValuedMap<K,V>
org.apache.commons.collections4.multimap.ArrayListValuedHashMap<K,V>
- Type Parameters:
K
- the type of the keys in this mapV
- the type of the values in this map
- All Implemented Interfaces:
Serializable
,ListValuedMap<K,
,V> MultiValuedMap<K,
V>
Implements a
ListValuedMap
, using a HashMap
to provide data
storage and ArrayList
s as value collections. This is the standard
implementation of a ListValuedMap.
Note that ArrayListValuedHashMap is not synchronized and is not thread-safe. If you wish to use this map from multiple threads concurrently, you must use appropriate synchronization. This class may throw exceptions when accessed by concurrent threads without synchronization.
- Since:
- 4.1
- See Also:
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Nested Class Summary
Nested classes/interfaces inherited from class org.apache.commons.collections4.multimap.AbstractMultiValuedMap
AbstractMultiValuedMap.WrappedCollection
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate static final int
The initial list capacity when using none specified in constructor.private static final int
The initial map capacity used when none specified in constructor.private final int
The initial list capacity when creating a new value collection.private static final long
Serialization Version -
Constructor Summary
ConstructorsConstructorDescriptionCreates an empty ArrayListValuedHashMap with the default initial map capacity (16) and the default initial list capacity (3).ArrayListValuedHashMap
(int initialListCapacity) Creates an empty ArrayListValuedHashMap with the default initial map capacity (16) and the specified initial list capacity.ArrayListValuedHashMap
(int initialMapCapacity, int initialListCapacity) Creates an empty ArrayListValuedHashMap with the specified initial map and list capacities.ArrayListValuedHashMap
(Map<? extends K, ? extends V> map) Creates an ArrayListValuedHashMap copying all the mappings of the given map.ArrayListValuedHashMap
(MultiValuedMap<? extends K, ? extends V> map) Creates an ArrayListValuedHashMap copying all the mappings of the given map. -
Method Summary
Modifier and TypeMethodDescriptionCreates a new value collection using the provided factory.private void
void
Trims the capacity of all value collections to their current size.private void
Methods inherited from class org.apache.commons.collections4.multimap.AbstractListValuedMap
get, getMap, remove, wrappedCollection
Methods inherited from class org.apache.commons.collections4.multimap.AbstractMultiValuedMap
asMap, clear, containsKey, containsMapping, containsValue, doReadObject, doWriteObject, entries, equals, hashCode, isEmpty, keys, keySet, mapIterator, put, putAll, putAll, putAll, removeMapping, setMap, size, toString, values
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface org.apache.commons.collections4.MultiValuedMap
asMap, clear, containsKey, containsMapping, containsValue, entries, isEmpty, keys, keySet, mapIterator, put, putAll, putAll, putAll, removeMapping, size, values
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Field Details
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serialVersionUID
private static final long serialVersionUIDSerialization Version- See Also:
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DEFAULT_INITIAL_MAP_CAPACITY
private static final int DEFAULT_INITIAL_MAP_CAPACITYThe initial map capacity used when none specified in constructor.- See Also:
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DEFAULT_INITIAL_LIST_CAPACITY
private static final int DEFAULT_INITIAL_LIST_CAPACITYThe initial list capacity when using none specified in constructor.- See Also:
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initialListCapacity
private final int initialListCapacityThe initial list capacity when creating a new value collection.
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Constructor Details
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ArrayListValuedHashMap
public ArrayListValuedHashMap()Creates an empty ArrayListValuedHashMap with the default initial map capacity (16) and the default initial list capacity (3). -
ArrayListValuedHashMap
public ArrayListValuedHashMap(int initialListCapacity) Creates an empty ArrayListValuedHashMap with the default initial map capacity (16) and the specified initial list capacity.- Parameters:
initialListCapacity
- the initial capacity used for value collections
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ArrayListValuedHashMap
public ArrayListValuedHashMap(int initialMapCapacity, int initialListCapacity) Creates an empty ArrayListValuedHashMap with the specified initial map and list capacities.- Parameters:
initialMapCapacity
- the initial hashmap capacityinitialListCapacity
- the initial capacity used for value collections
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ArrayListValuedHashMap
Creates an ArrayListValuedHashMap copying all the mappings of the given map.- Parameters:
map
- aMultiValuedMap
to copy into this map
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ArrayListValuedHashMap
Creates an ArrayListValuedHashMap copying all the mappings of the given map.- Parameters:
map
- aMap
to copy into this map
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Method Details
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createCollection
Description copied from class:AbstractListValuedMap
Creates a new value collection using the provided factory.- Specified by:
createCollection
in classAbstractListValuedMap<K,
V> - Returns:
- a new list
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trimToSize
public void trimToSize()Trims the capacity of all value collections to their current size. -
writeObject
- Throws:
IOException
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readObject
- Throws:
IOException
ClassNotFoundException
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