webwork.util

Class ServletValueStack

java.lang.Object

webwork.util.ValueStack

webwork.util.ServletValueStack

All Implemented Interfaces:

Iterable<Object>

public class ServletValueStack
extends ValueStack

Value stack implementation for a servlet based scenario.

Version:

$Revision: 1 $

Author:

Rickard Öberg (rickard@middleware-company.com), Maurice C. Parker (maurice@vineyardenterprise.com)

Nested Class Summary

Nested classes/interfaces inherited from class webwork.util.ValueStack

ValueStack.ValueHolder

Field Summary

Fields inherited from class webwork.util.ValueStack

classes, STACK_NAME, WEBWORK_VALUE_STACK_LOG_EXCEPTIONS

Constructor Summary

Constructors

Constructor and Description
ServletValueStack()

Method Summary

Methods

Modifier and Type	Method and Description
protected Object	findAttribute(String id) Mimic the behaviour of the findAttribute method in the PageContext This method is used when there is no pageContext set for this stack and the findInContext method is called.
protected Object	findInContext(String id) Find a value by id.
protected Object	getParameter(String aName) Get parameter directly from request
static ServletValueStack	getStack(javax.servlet.jsp.PageContext context) Get the value stack for a given page context.
static ServletValueStack	getStack(javax.servlet.ServletRequest request) Get the value stack for a given request.
void	setContext(javax.servlet.jsp.PageContext context) Set the page context that should be associated with this stack.

Methods inherited from class webwork.util.ValueStack

clearMethods, findMethod, findValue, findValue, getMethod, isEmpty, iterator, peek, popValue, pushValue, size, test, toString, unwrap

Methods inherited from class java.lang.Object

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

Constructor Detail

ServletValueStack

public ServletValueStack()

Method Detail

getStack

public static ServletValueStack getStack(javax.servlet.ServletRequest request)

Get the value stack for a given request. If there is no stack available, create one.

Parameters:

request - the request for which a stack shall be returned

Returns:

the value stack

getStack

public static ServletValueStack getStack(javax.servlet.jsp.PageContext context)

Get the value stack for a given page context. If there is no stack available, create one.

Parameters:

context - the page context to associate with the stack

Returns:

the value stack

setContext

public void setContext(javax.servlet.jsp.PageContext context)

Set the page context that should be associated with this stack. This is called for each use of the stack in a JSP context.

findInContext

protected Object findInContext(String id)

Description copied from class: ValueStack

Find a value by id. This method can be overridden by subclasses to have some context concept to evaluate

Overrides:

findInContext in class ValueStack

Parameters:

id - the value id.

Returns:

value

findAttribute

protected Object findAttribute(String id)

Mimic the behaviour of the findAttribute method in the PageContext This method is used when there is no pageContext set for this stack and the findInContext method is called. Look for the attribute in the request, session and application scope

Returns:

found value or null

getParameter

protected Object getParameter(String aName)

Get parameter directly from request

Overrides:

getParameter in class ValueStack