org.springframework.web.servlet.view.velocity
Class VelocityToolboxView

java.lang.Object
  org.springframework.context.support.ApplicationObjectSupport
      org.springframework.web.context.support.WebApplicationObjectSupport
          org.springframework.web.servlet.view.AbstractView
              org.springframework.web.servlet.view.AbstractUrlBasedView
                  org.springframework.web.servlet.view.AbstractTemplateView
                      org.springframework.web.servlet.view.velocity.VelocityView
                          org.springframework.web.servlet.view.velocity.VelocityToolboxView

All Implemented Interfaces:

ApplicationContextAware, BeanNameAware, View

public class VelocityToolboxView

extends VelocityView

VelocityView subclass which adds support for Velocity Tools toolboxes and Velocity Tools' ViewTool callbacks.

Specify a "toolboxConfigLocation", for example "/WEB-INF/toolbox.xml", to automatically load a Velocity Tools toolbox definition file and expose all defined tools in the specified scopes. If no config location is specified, no toolbox will be loaded and exposed.

This view will always create a special Velocity context, namely an instance of the ChainedContext class which is part of the view package of Velocity tools. This allows to use tools from the view package of Velocity Tools, like LinkTool, which need to be initialized with a special context that implements the ViewContext interface (that is, ChainedContext).

This view also checks tools that are specified as "toolAttributes": If they implement the ViewTool interface, they will get initialized with the Velocity context. This allows tools from the view package of Velocity Tools, like LinkTool, to be defined as "toolAttributes" on a VelocityView, instead of in a separate toolbox XML file.

This is a separate class mainly to avoid a required dependency on the view package of Velocity Tools in VelocityView itself.

Since:

1.1.3

Author:

Juergen Hoeller

See Also:

setToolboxConfigLocation(java.lang.String), initTool(java.lang.Object, org.apache.velocity.context.Context), ChainedContext, ViewTool, LinkTool

Field Summary

Fields inherited from class org.springframework.web.servlet.view.AbstractTemplateView

SPRING_MACRO_REQUEST_CONTEXT_ATTRIBUTE

Fields inherited from class org.springframework.web.servlet.view.AbstractView

DEFAULT_CONTENT_TYPE

Fields inherited from class org.springframework.context.support.ApplicationObjectSupport

logger

Constructor Summary

VelocityToolboxView()

Method Summary

protected Context	createVelocityContext(Map model, HttpServletRequest request, HttpServletResponse response) Overridden to create a ChainedContext, which is part of the view package of Velocity Tools, as special context.
protected void	initTool(Object tool, Context velocityContext) Overridden to check for the ViewContext interface which is part of the view package of Velocity Tools.
void	setToolboxConfigLocation(String toolboxConfigLocation) Set a "toolboxConfigLocation", for example "/WEB-INF/toolbox.xml", to automatically load a Velocity Tools toolbox definition file and expose all defined tools in the specified scopes.

Methods inherited from class org.springframework.web.servlet.view.velocity.VelocityView

autodetectVelocityEngine, checkTemplate, createVelocityContext, doRender, exposeHelpers, exposeHelpers, exposeHelpers, exposeToolAttributes, getEncoding, getTemplate, getTemplate, getVelocityEngine, initApplicationContext, isCacheTemplate, mergeTemplate, renderMergedTemplateModel, setCacheTemplate, setDateToolAttribute, setEncoding, setNumberToolAttribute, setToolAttributes, setVelocityEngine, setVelocityFormatterAttribute

Methods inherited from class org.springframework.web.servlet.view.AbstractTemplateView

renderMergedOutputModel, setAllowRequestOverride, setAllowSessionOverride, setExposeRequestAttributes, setExposeSessionAttributes, setExposeSpringMacroHelpers

Methods inherited from class org.springframework.web.servlet.view.AbstractUrlBasedView

getUrl, setUrl, toString

Methods inherited from class org.springframework.web.servlet.view.AbstractView

addStaticAttribute, createRequestContext, getAttributesMap, getBeanName, getContentType, getRequestContextAttribute, getStaticAttributes, render, setAttributes, setAttributesCSV, setAttributesMap, setBeanName, setContentType, setRequestContextAttribute

Methods inherited from class org.springframework.web.context.support.WebApplicationObjectSupport

getServletContext, getTempDir, getWebApplicationContext, isContextRequired

Methods inherited from class org.springframework.context.support.ApplicationObjectSupport

getApplicationContext, getMessageSourceAccessor, requiredContextClass, setApplicationContext

Methods inherited from class java.lang.Object

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

Constructor Detail

VelocityToolboxView

public VelocityToolboxView()

Method Detail

setToolboxConfigLocation

public void setToolboxConfigLocation(String toolboxConfigLocation)

Set a "toolboxConfigLocation", for example "/WEB-INF/toolbox.xml", to automatically load a Velocity Tools toolbox definition file and expose all defined tools in the specified scopes. If no config location is specified, no toolbox will be loaded and exposed.

The specfied location string needs to refer to a ServletContext resources, as expected by ServletToolboxManager which is part of the view package of Velocity Tools.

See Also:

ServletToolboxManager.getInstance(javax.servlet.ServletContext, java.lang.String)

createVelocityContext

protected Context createVelocityContext(Map model,
                                        HttpServletRequest request,
                                        HttpServletResponse response)
                                 throws Exception

Overridden to create a ChainedContext, which is part of the view package of Velocity Tools, as special context. ChainedContext is needed for initialization of ViewTool instances.

Overrides:

createVelocityContext in class VelocityView

Parameters:

model - the model Map, containing the model attributes to be exposed to the view

request - current HTTP request

response - current HTTP response

Returns:

the Velocity Context

Throws:

Exception - if there's a fatal error while creating the context

See Also:

initTool(java.lang.Object, org.apache.velocity.context.Context)

initTool

protected void initTool(Object tool,
                        Context velocityContext)
                 throws Exception

Overridden to check for the ViewContext interface which is part of the view package of Velocity Tools. This requires a special Velocity context, like ChainedContext as set up by createVelocityContext in this class.

Overrides:

initTool in class VelocityView

Parameters:

tool - the tool instance to initialize

velocityContext - the Velocity context

Throws:

Exception - if initializion of the tool failed

See Also:

createVelocityContext(java.util.Map, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)