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Java Source Code / Java Documentation » J2EE » spring framework 2.0.6 » org.springframework.web.servlet.view

Source Cross Reference Class Diagram Java Document (Java Doc)

org.springframework.web.servlet.view .AbstractView

org.springframework.web.servlet.view .AbstractUrlBasedView

org.springframework.web.servlet.view .InternalResourceView

All known Subclasses:   org.springframework.web.servlet.view.tiles .TilesView,  org.springframework.web.servlet.view .JstlView,
InternalResourceView
public class InternalResourceView extends AbstractUrlBasedView (Code)
Wrapper for a JSP or other resource within the same web application. Exposes model objects as request attributes and forwards the request to the specified resource URL using a RequestDispatcher.
A URL for this view is supposed to specify a resource within the web application, suitable for RequestDispatcher's forward or include method.
If operating within an already included request or within a response that has already been committed, this view will fall back to an include instead of a forward. This can be enforced by calling response.flushBuffer() (which will commit the response) before rendering the view.
Typical usage with InternalResourceViewResolver would look as follows, from the perspective of the DispatcherServlet context definition:
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean>
Every view name returned from a handler will be translated to a JSP resource (for example: "myView" -> "/WEB-INF/jsp/myView.jsp"), using this view class by default.
author:
   Rod Johnson
author:
   Juergen Hoeller
author:
   Rob Harrop
See Also:   javax.servlet.RequestDispatcher.forward
See Also:   javax.servlet.RequestDispatcher.include
See Also:   javax.servlet.ServletResponse.flushBuffer
See Also:   InternalResourceViewResolver

Constructor Summary
public InternalResourceView()
     Constructor for use as a bean.
public InternalResourceView(String url)
     Create a new InternalResourceView with the given URL.
public InternalResourceView(String url, boolean alwaysInclude)
     Create a new InternalResourceView with the given URL.

Method Summary
protected void exposeForwardRequestAttributes(HttpServletRequest request)
     Expose the current request URI and paths as HttpServletRequest attributes under the keys defined in the Servlet 2.4 specification, for Servlet 2.3- containers.
protected void exposeHelpers(HttpServletRequest request)
     Expose helpers unique to each rendering operation.
protected String prepareForRendering(HttpServletRequest request, HttpServletResponse response)
     Prepare for rendering, and determine the request dispatcher path to forward to (or to include).
protected void renderMergedOutputModel(Map model, HttpServletRequest request, HttpServletResponse response)
     Render the internal resource given the specified model.
public void setAlwaysInclude(boolean alwaysInclude)
     Specify whether to always include the view rather than forward to it.
Default is "false".
protected boolean useInclude(HttpServletRequest request, HttpServletResponse response)
     Determine whether to use RequestDispatcher's include or forward method.

Constructor Detail
InternalResourceView
public InternalResourceView()(Code)
Constructor for use as a bean.
See Also:   InternalResourceView.setUrl
See Also:   InternalResourceView.setAlwaysInclude

InternalResourceView
public InternalResourceView(String url)(Code)
Create a new InternalResourceView with the given URL.
Parameters:
  url - the URL to forward to
See Also:   InternalResourceView.setAlwaysInclude

InternalResourceView
public InternalResourceView(String url, boolean alwaysInclude)(Code)
Create a new InternalResourceView with the given URL.
Parameters:
  url - the URL to forward to
Parameters:
  alwaysInclude - whether to always include the view rather than forward to it

Method Detail
exposeForwardRequestAttributes
protected void exposeForwardRequestAttributes(HttpServletRequest request)(Code)
Expose the current request URI and paths as HttpServletRequest attributes under the keys defined in the Servlet 2.4 specification, for Servlet 2.3- containers.
Does not override values if already present, to not conflict with Servlet 2.4+ containers.
See Also:   org.springframework.web.util.WebUtils.exposeForwardRequestAttributes

exposeHelpers
protected void exposeHelpers(HttpServletRequest request) throws Exception(Code)
Expose helpers unique to each rendering operation. This is necessary so that different rendering operations can't overwrite each other's contexts etc.
Called by InternalResourceView.renderMergedOutputModel(Map,HttpServletRequest,HttpServletResponse) . The default implementation is empty. This method can be overridden to add custom helpers as request attributes.
Parameters:
  request - current HTTP request
throws:
  Exception - if there's a fatal error while we're adding attributes
See Also:   InternalResourceView.renderMergedOutputModel
See Also:   JstlView.exposeHelpers
See Also:   org.springframework.web.servlet.view.tiles.TilesJstlView.exposeHelpers

prepareForRendering
protected String prepareForRendering(HttpServletRequest request, HttpServletResponse response) throws Exception(Code)
Prepare for rendering, and determine the request dispatcher path to forward to (or to include).
This implementation simply returns the configured URL. Subclasses can override this to determine a resource to render, typically interpreting the URL in a different manner.
Parameters:
  request - current HTTP request
Parameters:
  response - current HTTP response the request dispatcher path to use
throws:
  Exception - if preparations failed
See Also:   InternalResourceView.getUrl
See Also:   org.springframework.web.servlet.view.tiles.TilesView.prepareForRendering

renderMergedOutputModel
protected void renderMergedOutputModel(Map model, HttpServletRequest request, HttpServletResponse response) throws Exception(Code)
Render the internal resource given the specified model. This includes setting the model as request attributes.

setAlwaysInclude
public void setAlwaysInclude(boolean alwaysInclude)(Code)
Specify whether to always include the view rather than forward to it.
Default is "false". Switch this flag on to enforce the use of a Servlet include, even if a forward would be possible.
See Also:   javax.servlet.RequestDispatcher.forward
See Also:   javax.servlet.RequestDispatcher.include
See Also:   InternalResourceView.useInclude(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)

useInclude
protected boolean useInclude(HttpServletRequest request, HttpServletResponse response)(Code)
Determine whether to use RequestDispatcher's include or forward method.
Performs a check whether an include URI attribute is found in the request, indicating an include request, and whether the response has already been committed. In both cases, an include will be performed, as a forward is not possible anymore.
Parameters:
  request - current HTTP request
Parameters:
  response - current HTTP response true for include, false for forward
See Also:   javax.servlet.RequestDispatcher.forward
See Also:   javax.servlet.RequestDispatcher.include
See Also:   javax.servlet.ServletResponse.isCommitted
See Also:   org.springframework.web.util.WebUtils.isIncludeRequest

Methods inherited from org.springframework.web.servlet.view.AbstractUrlBasedView
public void afterPropertiesSet() throws Exception(Code)(Java Doc)
public String getUrl()(Code)(Java Doc)
public void setUrl(String url)(Code)(Java Doc)
public String toString()(Code)(Java Doc)

Fields inherited from org.springframework.web.servlet.view.AbstractView
final public static String DEFAULT_CONTENT_TYPE(Code)(Java Doc)

Methods inherited from org.springframework.web.servlet.view.AbstractView
public void addStaticAttribute(String name, Object value)(Code)(Java Doc)
protected RequestContext createRequestContext(HttpServletRequest request, Map model)(Code)(Java Doc)
protected void exposeModelAsRequestAttributes(Map model, HttpServletRequest request) throws Exception(Code)(Java Doc)
public Map getAttributesMap()(Code)(Java Doc)
public String getBeanName()(Code)(Java Doc)
public String getContentType()(Code)(Java Doc)
public String getRequestContextAttribute()(Code)(Java Doc)
public Map getStaticAttributes()(Code)(Java Doc)
public void render(Map model, HttpServletRequest request, HttpServletResponse response) throws Exception(Code)(Java Doc)
abstract protected void renderMergedOutputModel(Map model, HttpServletRequest request, HttpServletResponse response) throws Exception(Code)(Java Doc)
public void setAttributes(Properties attributes)(Code)(Java Doc)
public void setAttributesCSV(String propString) throws IllegalArgumentException(Code)(Java Doc)
public void setAttributesMap(Map attributes)(Code)(Java Doc)
public void setBeanName(String beanName)(Code)(Java Doc)
public void setContentType(String contentType)(Code)(Java Doc)
public void setRequestContextAttribute(String requestContextAttribute)(Code)(Java Doc)
public String toString()(Code)(Java Doc)

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