org.apache.shiro.util
Class MapContext
java.lang.Object
org.apache.shiro.util.MapContext
- All Implemented Interfaces:
- Serializable, Map<String,Object>
- Direct Known Subclasses:
- DefaultSessionContext, DefaultSubjectContext
public class MapContext
- extends Object
- implements Map<String,Object>, Serializable
A MapContext
provides a common base for context-based data storage in a Map
. Type-safe attribute
retrieval is provided for subclasses with the getTypedValue(String, Class)
method.
- Since:
- 1.0
- See Also:
SubjectContext
,
SessionContext
,
Serialized Form
Nested classes/interfaces inherited from interface java.util.Map |
Map.Entry<K,V> |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
MapContext
public MapContext()
MapContext
public MapContext(Map<String,Object> map)
getTypedValue
protected <E> E getTypedValue(String key,
Class<E> type)
- Performs a
get
operation but additionally ensures that the value returned is of the specified
type
. If there is no value, null
is returned.
- Type Parameters:
E
- the expected type of the value- Parameters:
key
- the attribute key to look up a valuetype
- the expected type of the value
- Returns:
- the typed value or
null
if the attribute does not exist.
nullSafePut
protected void nullSafePut(String key,
Object value)
- Places a value in this context map under the given key only if the given
value
argument is not null.
- Parameters:
key
- the attribute key under which the non-null value will be storedvalue
- the non-null value to store. If null
, this method does nothing and returns immediately.
size
public int size()
- Specified by:
size
in interface Map<String,Object>
isEmpty
public boolean isEmpty()
- Specified by:
isEmpty
in interface Map<String,Object>
containsKey
public boolean containsKey(Object o)
- Specified by:
containsKey
in interface Map<String,Object>
containsValue
public boolean containsValue(Object o)
- Specified by:
containsValue
in interface Map<String,Object>
get
public Object get(Object o)
- Specified by:
get
in interface Map<String,Object>
put
public Object put(String s,
Object o)
- Specified by:
put
in interface Map<String,Object>
remove
public Object remove(Object o)
- Specified by:
remove
in interface Map<String,Object>
putAll
public void putAll(Map<? extends String,?> map)
- Specified by:
putAll
in interface Map<String,Object>
clear
public void clear()
- Specified by:
clear
in interface Map<String,Object>
keySet
public Set<String> keySet()
- Specified by:
keySet
in interface Map<String,Object>
values
public Collection<Object> values()
- Specified by:
values
in interface Map<String,Object>
entrySet
public Set<Map.Entry<String,Object>> entrySet()
- Specified by:
entrySet
in interface Map<String,Object>
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