Package org.apache.shiro.util

Class MapContext

org.apache.shiro.util.MapContext

All Implemented Interfaces:

, <,>

Direct Known Subclasses:

DefaultSessionContext, DefaultSubjectContext

public class MapContext
extends 
implements <,>, 

A MapContext provides a common base for context-based data storage in a . Type-safe attribute retrieval is provided for subclasses with the getTypedValue(String, Class) method.

Since:

1.0

See Also:

SubjectContext, SessionContext, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.

< extends , extends >

Constructor Summary

Constructors

Constructor	Description
MapContext()
<,> map)

Method Summary

Modifier and Type	Method	Description
void	clear()
boolean	o)
boolean	o)
<<,>>	entrySet()
	o)
protected <E> E	key, <E> type)	Performs a get operation but additionally ensures that the value returned is of the specified type.
boolean	isEmpty()
<>	keySet()
protected void	key, value)	Places a value in this context map under the given key only if the given value argument is not null.
	s, o)
void	<? extends ,?> map)
	o)
int	size()
<>	values()

Methods inherited from class java.lang.

, , , , , , , , , ,

Methods inherited from interface java.util.

, , , , , , , , , , , ,

Constructor Detail

MapContext

public MapContext()

MapContext

public MapContext(<,> map)

Method Detail

getTypedValue

protected <E> E getTypedValue( key,
                              <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 value

type - the expected type of the value

Returns:

the typed value or null if the attribute does not exist.

nullSafePut

protected void nullSafePut( key,
                            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 stored

value - the non-null value to store. If null, this method does nothing and returns immediately.

size

public int size()

Specified by:

in interface <,>

isEmpty

public boolean isEmpty()

Specified by:

in interface <,>

containsKey

public boolean containsKey( o)

Specified by:

in interface <,>

containsValue

public boolean containsValue( o)

Specified by:

in interface <,>

get

public  get( o)

Specified by:

in interface <,>

put

public  put( s,
                   o)

Specified by:

in interface <,>

remove

public  remove( o)

Specified by:

in interface <,>

putAll

public void putAll(<? extends ,?> map)

Specified by:

in interface <,>

clear

public void clear()

Specified by:

in interface <,>

keySet

public <> keySet()

Specified by:

in interface <,>

values

public <> values()

Specified by:

in interface <,>

entrySet

public <<,>> entrySet()

Specified by:

in interface <,>