Package com.opensymphony.module.sitemesh.mapper

Class NullDecoratorMapper

java.lang.Object

com.opensymphony.module.sitemesh.mapper.NullDecoratorMapper

All Implemented Interfaces:

DecoratorMapper

public class NullDecoratorMapper
extends Object
implements DecoratorMapper

The NullDecoratorMapper represents the top-level DecoratorMapper that is finally delegated to if no other DecoratorMapper has intervened. It is used so the parent property does not have to be checked by other DecoratorMappers (null object pattern).

Author:

Joe Walnes

See Also:

• DecoratorMapper

Constructor Summary

Constructors

Constructor	Description
NullDecoratorMapper()

Method Summary

Modifier and Type	Method	Description
Decorator	getDecorator(javax.servlet.http.HttpServletRequest request, Page page)	Returns null.
Decorator	getNamedDecorator(javax.servlet.http.HttpServletRequest request, String name)	Returns null.
void	init(Config config, Properties properties, DecoratorMapper parent)	Does nothing.

Methods inherited from class java.lang.Object

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

Constructor Details

NullDecoratorMapper

public NullDecoratorMapper()

Method Details

init

public void init(Config config,
 Properties properties,
 DecoratorMapper parent)

Does nothing.

Specified by:

init in interface DecoratorMapper

Parameters:

config - Config supplied by Servlet or Filter.

properties - Any initialization properties (specific to implementation).

parent - the parent

getDecorator

public Decorator getDecorator(javax.servlet.http.HttpServletRequest request,
 Page page)

Returns null.

Specified by:

getDecorator in interface DecoratorMapper

Parameters:

request - the request

page - the page

Returns:

the decorator

getNamedDecorator

public Decorator getNamedDecorator(javax.servlet.http.HttpServletRequest request,
 String name)

Returns null.

Specified by:

getNamedDecorator in interface DecoratorMapper

Parameters:

request - the request

name - the name

Returns:

the named decorator