org.springframework.webflow.context.servlet

Class HttpServletContextMap

java.lang.Object

org.springframework.binding.collection.StringKeyedMapAdapter<java.lang.Object>

org.springframework.webflow.context.servlet.HttpServletContextMap

All Implemented Interfaces:

java.util.Map<java.lang.String,java.lang.Object>, SharedMap<java.lang.String,java.lang.Object>

public class HttpServletContextMap
extends StringKeyedMapAdapter<java.lang.Object>
implements SharedMap<java.lang.String,java.lang.Object>

Map backed by the Servlet context for accessing application scoped attributes.

Author:

Keith Donald

Nested Class Summary

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

java.util.Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
HttpServletContextMap(javax.servlet.ServletContext context) Create a map wrapping given servlet context.

Method Summary

Methods

Modifier and Type	Method and Description
protected java.lang.Object	getAttribute(java.lang.String key) Hook method that needs to be implemented by concrete subclasses.
protected java.util.Iterator<java.lang.String>	getAttributeNames() Hook method that needs to be implemented by concrete subclasses.
java.lang.Object	getMutex() Returns the shared mutex that may be synchronized on using a synchronized block.
protected void	removeAttribute(java.lang.String key) Hook method that needs to be implemented by concrete subclasses.
protected void	setAttribute(java.lang.String key, java.lang.Object value) Hook method that needs to be implemented by concrete subclasses.

Methods inherited from class org.springframework.binding.collection.StringKeyedMapAdapter

clear, containsKey, containsValue, entrySet, get, isEmpty, keySet, put, putAll, remove, size, 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

clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, values

Constructor Detail

HttpServletContextMap

public HttpServletContextMap(javax.servlet.ServletContext context)

Create a map wrapping given servlet context.

Method Detail

getAttribute

protected java.lang.Object getAttribute(java.lang.String key)

Description copied from class: StringKeyedMapAdapter

Hook method that needs to be implemented by concrete subclasses. Gets a value associated with a key.

Specified by:

getAttribute in class StringKeyedMapAdapter<java.lang.Object>

Parameters:

key - the key to lookup

Returns:

the associated value, or null if none

setAttribute

protected void setAttribute(java.lang.String key,
                java.lang.Object value)

Description copied from class: StringKeyedMapAdapter

Hook method that needs to be implemented by concrete subclasses. Puts a key-value pair in the map, overwriting any possible earlier value associated with the same key.

Specified by:

setAttribute in class StringKeyedMapAdapter<java.lang.Object>

Parameters:

key - the key to associate the value with

value - the value to associate with the key

removeAttribute

protected void removeAttribute(java.lang.String key)

Description copied from class: StringKeyedMapAdapter

Hook method that needs to be implemented by concrete subclasses. Removes a key and its associated value from the map.

Specified by:

removeAttribute in class StringKeyedMapAdapter<java.lang.Object>

Parameters:

key - the key to remove

getAttributeNames

protected java.util.Iterator<java.lang.String> getAttributeNames()

Description copied from class: StringKeyedMapAdapter

Hook method that needs to be implemented by concrete subclasses. Returns an enumeration listing all keys known to the map.

Specified by:

getAttributeNames in class StringKeyedMapAdapter<java.lang.Object>

Returns:

the key enumeration

getMutex

public java.lang.Object getMutex()

Description copied from interface: SharedMap

Returns the shared mutex that may be synchronized on using a synchronized block. The returned mutex is guaranteed to be non-null. Example usage:

 synchronized (sharedMap.getMutex()) {
        // do synchronized work
 }
 

Specified by:

getMutex in interface SharedMap<java.lang.String,java.lang.Object>

Returns:

the mutex