org.displaytag.decorator
Class DefaultDecoratorFactory

java.lang.Object
  org.displaytag.decorator.DefaultDecoratorFactory

All Implemented Interfaces:

DecoratorFactory

public class DefaultDecoratorFactory
extends java.lang.Object
implements DecoratorFactory

Factory for TableDecorator or ColumnDecorator object.

Version:

$Id$

Author:

Fabrizio Giustina

Constructor Summary

DefaultDecoratorFactory()

Method Summary

DisplaytagColumnDecorator	loadColumnDecorator(javax.servlet.jsp.PageContext pageContext, java.lang.String decoratorName) If the user has specified a column decorator, then this method takes care of creating the decorator (and checking to make sure it is a subclass of the DisplaytagColumnDecorator object).
TableDecorator	loadTableDecorator(javax.servlet.jsp.PageContext pageContext, java.lang.String decoratorName) If the user has specified a decorator, then this method takes care of creating the decorator (and checking to make sure it is a subclass of the TableDecorator object).

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultDecoratorFactory

public DefaultDecoratorFactory()

Method Detail

loadTableDecorator

public TableDecorator loadTableDecorator(javax.servlet.jsp.PageContext pageContext,
                                         java.lang.String decoratorName)
                                  throws DecoratorInstantiationException

If the user has specified a decorator, then this method takes care of creating the decorator (and checking to make sure it is a subclass of the TableDecorator object). If there are any problems loading the decorator then this will throw a DecoratorInstantiationException which will get propagated up to the page.

Two different methods for loading a decorator are handled by this factory:

• First of all, an object with key decoratorName is searched in the page/request/session/scope
• If not found, assume decoratorName is the class name of the decorator and load it using reflection

Specified by:

loadTableDecorator in interface DecoratorFactory

Parameters:

decoratorName - String full decorator class name

Returns:

instance of TableDecorator

Throws:

DecoratorInstantiationException - if unable to load specified TableDecorator

loadColumnDecorator

public DisplaytagColumnDecorator loadColumnDecorator(javax.servlet.jsp.PageContext pageContext,
                                                     java.lang.String decoratorName)
                                              throws DecoratorInstantiationException

If the user has specified a column decorator, then this method takes care of creating the decorator (and checking to make sure it is a subclass of the DisplaytagColumnDecorator object). If there are any problems loading the decorator then this will throw a DecoratorInstantiationException which will get propagated up to the page.

Two different methods for loading a decorator are handled by this factory:

• First of all, an object with key decoratorName is searched in the page/request/session/scope
• If not found, assume decoratorName is the class name of the decorator and load it using reflection

Specified by:

loadColumnDecorator in interface DecoratorFactory

Parameters:

decoratorName - String full decorator class name

Returns:

instance of DisplaytagColumnDecorator

Throws:

DecoratorInstantiationException - if unable to load ColumnDecorator