org.apache.openjpa.lib.util.concurrent
Class NullSafeConcurrentHashMap
java.lang.Object
   java.util.AbstractMap<K,V>
java.util.AbstractMap<K,V>
       java.util.concurrent.ConcurrentHashMap
java.util.concurrent.ConcurrentHashMap
           org.apache.openjpa.lib.util.concurrent.NullSafeConcurrentHashMap
org.apache.openjpa.lib.util.concurrent.NullSafeConcurrentHashMap
- All Implemented Interfaces: 
- java.io.Serializable, java.util.concurrent.ConcurrentMap, java.util.Map
- Direct Known Subclasses: 
- SizedConcurrentHashMap
- public class NullSafeConcurrentHashMap 
- extends java.util.concurrent.ConcurrentHashMap
A subclass of ConcurrentHashMap that allows null keys and values.
 In exchange, it weakens the contract of putIfAbsent(java.lang.Object, java.lang.Object) and the other
 concurrent methods added in #ConcurrentHashMap.
- Since:
- 1.1.0
- See Also:
- Serialized Form
 
| Nested classes/interfaces inherited from interface java.util.Map | 
| java.util.Map.Entry<K,V> | 
 
 
| Method Summary | 
|  boolean | contains(java.lang.Object value)
 | 
|  boolean | containsKey(java.lang.Object key)
 | 
|  boolean | containsValue(java.lang.Object value)
 | 
|  java.util.Enumeration | elements()
 | 
|  java.util.Set | entrySet()
 | 
|  java.lang.Object | get(java.lang.Object key)
 | 
|  java.util.Enumeration | keys()
 | 
|  java.util.Set | keySet()
 | 
|  java.lang.Object | put(java.lang.Object key,
    java.lang.Object value)
 | 
|  java.lang.Object | putIfAbsent(java.lang.Object key,
            java.lang.Object value)
 | 
|  java.util.Iterator<java.util.Map.Entry> | randomEntryIterator()The returned data structure should not be shared among multiple
 threads.
 | 
|  java.lang.Object | remove(java.lang.Object key)
 | 
|  boolean | remove(java.lang.Object key,
       java.lang.Object value)
 | 
|  java.util.Map.Entry | removeRandom()
 | 
|  java.lang.Object | replace(java.lang.Object key,
        java.lang.Object value)
 | 
|  boolean | replace(java.lang.Object key,
        java.lang.Object oldValue,
        java.lang.Object newValue)
 | 
|  java.util.Collection | values()
 | 
 
| Methods inherited from class java.util.concurrent.ConcurrentHashMap | 
| clear, isEmpty, putAll, size | 
 
| Methods inherited from class java.util.AbstractMap | 
| clone, 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 | 
 
NullSafeConcurrentHashMap
public NullSafeConcurrentHashMap(int size,
                                 float load,
                                 int concurrencyLevel)
NullSafeConcurrentHashMap
public NullSafeConcurrentHashMap()
removeRandom
public java.util.Map.Entry removeRandom()
- 
 
randomEntryIterator
public java.util.Iterator<java.util.Map.Entry> randomEntryIterator()
- The returned data structure should not be shared among multiple
 threads.
 
- 
 
remove
public java.lang.Object remove(java.lang.Object key)
- 
- Specified by:
- removein interface- java.util.Map
- Overrides:
- removein class- java.util.concurrent.ConcurrentHashMap
 
- 
 
remove
public boolean remove(java.lang.Object key,
                      java.lang.Object value)
- 
- Specified by:
- removein interface- java.util.concurrent.ConcurrentMap
- Overrides:
- removein class- java.util.concurrent.ConcurrentHashMap
 
- 
 
replace
public boolean replace(java.lang.Object key,
                       java.lang.Object oldValue,
                       java.lang.Object newValue)
- 
- Specified by:
- replacein interface- java.util.concurrent.ConcurrentMap
- Overrides:
- replacein class- java.util.concurrent.ConcurrentHashMap
 
- 
 
replace
public java.lang.Object replace(java.lang.Object key,
                                java.lang.Object value)
- 
- Specified by:
- replacein interface- java.util.concurrent.ConcurrentMap
- Overrides:
- replacein class- java.util.concurrent.ConcurrentHashMap
 
- 
 
putIfAbsent
public java.lang.Object putIfAbsent(java.lang.Object key,
                                    java.lang.Object value)
- 
- Specified by:
- putIfAbsentin interface- java.util.concurrent.ConcurrentMap
- Overrides:
- putIfAbsentin class- java.util.concurrent.ConcurrentHashMap
 
- 
 
put
public java.lang.Object put(java.lang.Object key,
                            java.lang.Object value)
- 
- Specified by:
- putin interface- java.util.Map
- Overrides:
- putin class- java.util.concurrent.ConcurrentHashMap
 
- 
 
get
public java.lang.Object get(java.lang.Object key)
- 
- Specified by:
- getin interface- java.util.Map
- Overrides:
- getin class- java.util.concurrent.ConcurrentHashMap
 
- 
 
containsKey
public boolean containsKey(java.lang.Object key)
- 
- Specified by:
- containsKeyin interface- java.util.Map
- Overrides:
- containsKeyin class- java.util.concurrent.ConcurrentHashMap
 
- 
 
containsValue
public boolean containsValue(java.lang.Object value)
- 
- Specified by:
- containsValuein interface- java.util.Map
- Overrides:
- containsValuein class- java.util.concurrent.ConcurrentHashMap
 
- 
 
contains
public boolean contains(java.lang.Object value)
- 
- Overrides:
- containsin class- java.util.concurrent.ConcurrentHashMap
 
- 
 
elements
public java.util.Enumeration elements()
- 
- Overrides:
- elementsin class- java.util.concurrent.ConcurrentHashMap
 
- 
 
entrySet
public java.util.Set entrySet()
- 
- Specified by:
- entrySetin interface- java.util.Map
- Overrides:
- entrySetin class- java.util.concurrent.ConcurrentHashMap
 
- 
 
keys
public java.util.Enumeration keys()
- 
- Overrides:
- keysin class- java.util.concurrent.ConcurrentHashMap
 
- 
 
keySet
public java.util.Set keySet()
- 
- Specified by:
- keySetin interface- java.util.Map
- Overrides:
- keySetin class- java.util.concurrent.ConcurrentHashMap
 
- 
 
values
public java.util.Collection values()
- 
- Specified by:
- valuesin interface- java.util.Map
- Overrides:
- valuesin class- java.util.concurrent.ConcurrentHashMap
 
- 
 
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