org.jboss.weld.util.collections

Class DefaultValueMap<K,V>

java.lang.Object

com.google.common.collect.ForwardingObject

com.google.common.collect.ForwardingMap<K,V>

org.jboss.weld.util.collections.DefaultValueMap<K,V>

Type Parameters:

K -

V -

All Implemented Interfaces:

Map<K,V>

public class DefaultValueMap<K,V>
extends com.google.common.collect.ForwardingMap<K,V>

Wrapper for a Map that provides default values. When the get(Object) method is invoked and the underlying map does not contain the given key, the default value is stored in the map under the given key. The new value is then returned from the methods. This class is not thread-safe and needs to be externally synchronized. It is not thread safe even if the delegate map is. The semantics of ForwardingMap.keySet(), ForwardingMap.containsKey(Object), ForwardingMap.containsValue(Object) and ForwardingMap.values() are not modified by this wrapper.

Author:

Jozef Hartinger

Nested Class Summary

Nested classes/interfaces inherited from class com.google.common.collect.ForwardingMap

com.google.common.collect.ForwardingMap.StandardEntrySet, com.google.common.collect.ForwardingMap.StandardKeySet, com.google.common.collect.ForwardingMap.StandardValues

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

Map.Entry<K,V>

Method Summary

Methods

Modifier and Type	Method and Description
protected Map<K,V>	delegate()
V	get(Object key)
static <K,V> DefaultValueMap<K,V>	hashMapWithDefaultValue(com.google.common.base.Supplier<V> defaultValueSupplier)
static <K,V> DefaultValueMap<K,V>	of(Map<K,V> delegate, com.google.common.base.Supplier<V> defaultValueSupplier)

Methods inherited from class com.google.common.collect.ForwardingMap

clear, containsKey, containsValue, entrySet, equals, hashCode, isEmpty, keySet, put, putAll, remove, size, standardClear, standardContainsKey, standardContainsValue, standardEquals, standardHashCode, standardIsEmpty, standardPutAll, standardRemove, standardToString, values

Methods inherited from class com.google.common.collect.ForwardingObject

toString

Methods inherited from class java.lang.Object

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

Method Detail

of

public static <K,V> DefaultValueMap<K,V> of(Map<K,V> delegate,
                            com.google.common.base.Supplier<V> defaultValueSupplier)

hashMapWithDefaultValue

public static <K,V> DefaultValueMap<K,V> hashMapWithDefaultValue(com.google.common.base.Supplier<V> defaultValueSupplier)

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

Overrides:

get in class com.google.common.collect.ForwardingMap<K,V>

delegate

protected Map<K,V> delegate()

Overrides:

delegate in class com.google.common.collect.ForwardingMap<K,V>