org.apache.click.util
Class SessionMap

java.lang.Object
  org.apache.click.util.SessionMap

All Implemented Interfaces:

Map<String,Object>

public class SessionMap
extends Object
implements Map<String,Object>

Provides a Map adaptor for HttpSession objects. A SessionMap instance is available in each Velocity page using the name "session".

For example suppose we have a User object in the session with the attribute name "user" when a user is logged on. We can display the users name in the page when the are logged onto the system.

 #if ($session.user)
   $session.user.fullname you are logged on.
 #else
   You are not logged on.
 #end 

The ClickServlet adds a SessionMap instance to the Velocity Context before it is merged with the page template.

The SessionMap supports FlashAttribute which when accessed via get(Object) are removed from the session.

Field Summary

protected HttpSession

session The internal session attribute.

Constructor Summary

SessionMap(HttpSession value)
Create a HttpSession Map adaptor.

Method Summary

void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value) This method is not supported and will throw UnsupportedOperationException if invoked.
Set<Map.Entry<String,Object>>	entrySet()
Object	get(Object key) If the stored object is a FlashObject this method will return the FlashObject value and then remove it from the session.
boolean	isEmpty()
Set<String>	keySet()
Object	put(String key, Object value)
void	putAll(Map<? extends String,?> map)
Object	remove(Object key)
int	size()
Collection<Object>	values()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Field Detail

session

protected HttpSession session

The internal session attribute.

Constructor Detail

SessionMap

public SessionMap(HttpSession value)

Create a HttpSession Map adaptor.

Parameters:

value - the http session

Method Detail

size

public int size()

Specified by:

size in interface Map<String,Object>

See Also:

Map.size()

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<String,Object>

See Also:

Map.isEmpty()

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<String,Object>

See Also:

Map.containsKey(Object)

containsValue

public boolean containsValue(Object value)

This method is not supported and will throw UnsupportedOperationException if invoked.

Specified by:

containsValue in interface Map<String,Object>

See Also:

Map.containsValue(Object)

get

public Object get(Object key)

If the stored object is a FlashObject this method will return the FlashObject value and then remove it from the session.

Specified by:

get in interface Map<String,Object>

See Also:

Map.get(Object)

put

public Object put(String key,
                  Object value)

Specified by:

put in interface Map<String,Object>

See Also:

Map.put(Object, Object)

remove

public Object remove(Object key)

Specified by:

remove in interface Map<String,Object>

See Also:

Map.remove(Object)

putAll

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

Specified by:

putAll in interface Map<String,Object>

See Also:

Map.putAll(Map)

clear

public void clear()

Specified by:

clear in interface Map<String,Object>

See Also:

Map.clear()

keySet

public Set<String> keySet()

Specified by:

keySet in interface Map<String,Object>

See Also:

Map.keySet()

values

public Collection<Object> values()

Specified by:

values in interface Map<String,Object>

See Also:

Map.values()

entrySet

public Set<Map.Entry<String,Object>> entrySet()

Specified by:

entrySet in interface Map<String,Object>

See Also:

Map.entrySet()