XsltView (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.web.servlet.view.xslt
Class XsltView

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.xslt.XsltView

All Implemented Interfaces:: BeanNameAware, InitializingBean, ApplicationContextAware, ServletContextAware, View

public class XsltView
extends AbstractUrlBasedView
extends AbstractUrlBasedView

XSLT-driven View that allows for response context to be rendered as the result of an XSLT transformation.

The XSLT Source object is supplied as a parameter in the model and then detected during response rendering. Users can either specify a specific entry in the model via the sourceKey property or have Spring locate the Source object. This class also provides basic conversion of objects into Source implementations. See here for more details.

All model parameters are passed to the XSLT Transformer as parameters. In addition the user can configure output properties to be passed to the Transformer.

Since:: 2.0
Author:: Rob Harrop, Juergen Hoeller

Field Summary

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

XsltView()


Method Summary

protected void configureIndentation(Transformer transformer)
          Configure the indentation settings for the supplied Transformer.

protected void configureResponse(Map model, HttpServletResponse response, Transformer transformer)
          Configure the supplied HttpServletResponse.

protected void configureTransformer(Map model, HttpServletResponse response, Transformer transformer)
          Configure the supplied Transformer instance.

protected Source convertSource(Object source)
          Convert the supplied Object into an XSLT Source if the Object type is supported.

protected void copyModelParameters(Map model, Transformer transformer)
          Copy all entries from the supplied Map into the parameter set of the supplied Transformer.

protected void copyOutputProperties(Transformer transformer)
          Copy the configured output Properties, if any, into the output property set of the supplied Transformer.

protected Result createResult(HttpServletResponse response)
          Create the XSLT Result used to render the result of the transformation.

protected Transformer createTransformer(Templates templates)
          Create the Transformer instance used to prefer the XSLT transformation.

protected Class[] getSourceTypes()
          Return the array of Classes that are supported when converting to an XSLT Source.

protected Source getStylesheetSource()
          Get the XSLT Source for the XSLT template under the configured URL.

protected TransformerFactory getTransformerFactory()
          Return the TransformerFactory that this XsltView uses.

protected void initApplicationContext()
          Initialize this XsltView's TransformerFactory.

protected Source locateSource(Map model)
          Locate the Source object in the supplied model, converting objects as required.

protected void renderMergedOutputModel(Map model, HttpServletRequest request, HttpServletResponse response)
          Subclasses must implement this method to actually render the view.

void setCacheTemplates(boolean cacheTemplates)
          Turn on/off the caching of the XSLT Templates instance.

void setErrorListener(ErrorListener errorListener)
          Set an implementation of the ErrorListener interface for custom handling of transformation errors and warnings.

void setIndent(boolean indent)
          Set whether the XSLT transformer may add additional whitespace when outputting the result tree.

void setOutputProperties(Properties outputProperties)
          Set arbitrary transformer output properties to be applied to the stylesheet.

void setSourceKey(String sourceKey)
          Set the name of the model attribute that represents the XSLT Source.

void setUriResolver(URIResolver uriResolver)
          Set the URIResolver used in the transform.

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

afterPropertiesSet, getUrl, setUrl, toString

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

addStaticAttribute, createRequestContext, exposeModelAsRequestAttributes, 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, setServletContext

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

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
`XsltView()`

Method Summary
`protected void`	`configureIndentation(Transformer transformer)` Configure the indentation settings for the supplied `Transformer`.
`protected void`	`configureResponse(Map model, HttpServletResponse response, Transformer transformer)` Configure the supplied `HttpServletResponse`.
`protected void`	`configureTransformer(Map model, HttpServletResponse response, Transformer transformer)` Configure the supplied `Transformer` instance.
`protected Source`	`convertSource(Object source)` Convert the supplied `Object` into an XSLT `Source` if the `Object` type is `supported`.
`protected void`	`copyModelParameters(Map model, Transformer transformer)` Copy all entries from the supplied Map into the `parameter set` of the supplied `Transformer`.
`protected void`	`copyOutputProperties(Transformer transformer)` Copy the configured output `Properties`, if any, into the `output property set` of the supplied `Transformer`.
`protected Result`	`createResult(HttpServletResponse response)` Create the XSLT `Result` used to render the result of the transformation.
`protected Transformer`	`createTransformer(Templates templates)` Create the `Transformer` instance used to prefer the XSLT transformation.
`protected Class[]`	`getSourceTypes()` Return the array of `Classes` that are supported when converting to an XSLT `Source`.
`protected Source`	`getStylesheetSource()` Get the XSLT `Source` for the XSLT template under the `configured URL`.
`protected TransformerFactory`	`getTransformerFactory()` Return the TransformerFactory that this XsltView uses.
`protected void`	`initApplicationContext()` Initialize this XsltView's TransformerFactory.
`protected Source`	`locateSource(Map model)` Locate the `Source` object in the supplied model, converting objects as required.
`protected void`	`renderMergedOutputModel(Map model, HttpServletRequest request, HttpServletResponse response)` Subclasses must implement this method to actually render the view.
`void`	`setCacheTemplates(boolean cacheTemplates)` Turn on/off the caching of the XSLT `Templates` instance.
`void`	`setErrorListener(ErrorListener errorListener)` Set an implementation of the `ErrorListener` interface for custom handling of transformation errors and warnings.
`void`	`setIndent(boolean indent)` Set whether the XSLT transformer may add additional whitespace when outputting the result tree.
`void`	`setOutputProperties(Properties outputProperties)` Set arbitrary transformer output properties to be applied to the stylesheet.
`void`	`setSourceKey(String sourceKey)` Set the name of the model attribute that represents the XSLT Source.
`void`	`setUriResolver(URIResolver uriResolver)` Set the URIResolver used in the transform.

Methods inherited from class org.springframework.web.servlet.view.AbstractUrlBasedView
`afterPropertiesSet, getUrl, setUrl, toString`

Methods inherited from class org.springframework.web.servlet.view.AbstractView
`addStaticAttribute, createRequestContext, exposeModelAsRequestAttributes, 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, setServletContext`

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

XsltView

public XsltView()

Method Detail

setSourceKey

public void setSourceKey(String sourceKey)

Set the name of the model attribute that represents the XSLT Source. If not specified, the model map will be searched for a matching value type.

The following source types are supported out of the box: Source, Document, Node, Reader, InputStream and Resource.

See Also:: getSourceTypes(), convertSource(java.lang.Object)

setUriResolver

public void setUriResolver(URIResolver uriResolver)

Set the URIResolver used in the transform.

The URIResolver handles calls to the XSLT document() function.

setErrorListener

public void setErrorListener(ErrorListener errorListener)

Set an implementation of the ErrorListener interface for custom handling of transformation errors and warnings.

If not set, a default SimpleTransformErrorListener is used that simply logs warnings using the logger instance of the view class, and rethrows errors to discontinue the XML transformation.

See Also:: SimpleTransformErrorListener

setIndent

public void setIndent(boolean indent)

Set whether the XSLT transformer may add additional whitespace when outputting the result tree.

Default is true (on); set this to false (off) to not specify an "indent" key, leaving the choice up to the stylesheet.

See Also:: OutputKeys.INDENT

setOutputProperties

public void setOutputProperties(Properties outputProperties)

Set arbitrary transformer output properties to be applied to the stylesheet.

Any values specified here will override defaults that this view sets programmatically.

See Also:: Transformer.setOutputProperty(java.lang.String, java.lang.String)

setCacheTemplates

public void setCacheTemplates(boolean cacheTemplates)

Turn on/off the caching of the XSLT Templates instance.

The default value is "true". Only set this to "false" in development, where caching does not seriously impact performance.

initApplicationContext

protected void initApplicationContext()
                               throws BeansException

Initialize this XsltView's TransformerFactory.

Overrides:: initApplicationContext in class ApplicationObjectSupport

Throws:: ApplicationContextException - in case of initialization errors; BeansException - if thrown by ApplicationContext methods
See Also:: ApplicationObjectSupport.setApplicationContext(org.springframework.context.ApplicationContext)

getTransformerFactory

protected final TransformerFactory getTransformerFactory()

Return the TransformerFactory that this XsltView uses.

Returns:: the TransformerFactory (never null)

renderMergedOutputModel

protected void renderMergedOutputModel(Map model,
                                       HttpServletRequest request,
                                       HttpServletResponse response)
                                throws Exception

Description copied from class: AbstractView

Subclasses must implement this method to actually render the view.

The first step will be preparing the request: In the JSP case, this would mean setting model objects as request attributes. The second step will be the actual rendering of the view, for example including the JSP via a RequestDispatcher.

Specified by:: renderMergedOutputModel in class AbstractView

Parameters:: model - combined output Map (never null), with dynamic values taking precedence over static attributes; request - current HTTP request; response - current HTTP response
Throws:: Exception - if rendering failed

createResult

protected Result createResult(HttpServletResponse response)
                       throws Exception

Create the XSLT Result used to render the result of the transformation.

The default implementation creates a StreamResult wrapping the supplied HttpServletResponse's OutputStream.

Parameters:: response - current HTTP response
Returns:: the XSLT Result to use
Throws:: Exception - if the Result cannot be built

locateSource

protected Source locateSource(Map model)
                       throws Exception

Locate the Source object in the supplied model, converting objects as required. The default implementation first attempts to look under the configured source key, if any, before attempting to locate an object of supported type.

Parameters:: model - the merged model Map
Returns:: the XSLT Source object (or null if none found)
Throws:: Exception - if an error occured during locating the source
See Also:: setSourceKey(java.lang.String), convertSource(java.lang.Object)

getSourceTypes

protected Class[] getSourceTypes()

Return the array of Classes that are supported when converting to an XSLT Source.

Currently supports Source, Document, Node, Reader, InputStream and Resource.

Returns:: the supported source types

convertSource

protected Source convertSource(Object source)
                        throws Exception

Convert the supplied Object into an XSLT Source if the Object type is supported.

Parameters:: source - the original source object
Returns:: the adapted XSLT Source
Throws:: IllegalArgumentException - if the given Object is not of a supported type; Exception

configureTransformer

protected void configureTransformer(Map model,
                                    HttpServletResponse response,
                                    Transformer transformer)

Configure the supplied Transformer instance.

The default implementation copies parameters from the model into the Transformer's parameter set. This implementation also copies the output properties into the Transformer output properties. Indentation properties are set as well.

Parameters:: model - merged output Map (never null); response - current HTTP response; transformer - the target transformer
See Also:: copyModelParameters(Map, Transformer), copyOutputProperties(Transformer), configureIndentation(Transformer)

configureIndentation

protected final void configureIndentation(Transformer transformer)

Configure the indentation settings for the supplied Transformer.

Parameters:: transformer - the target transformer
Throws:: IllegalArgumentException - if the supplied Transformer is null
See Also:: TransformerUtils.enableIndenting(javax.xml.transform.Transformer), TransformerUtils.disableIndenting(javax.xml.transform.Transformer)

copyOutputProperties

protected final void copyOutputProperties(Transformer transformer)

Copy the configured output Properties, if any, into the output property set of the supplied Transformer.

Parameters:: transformer - the target transformer

copyModelParameters

protected final void copyModelParameters(Map model,
                                         Transformer transformer)

Copy all entries from the supplied Map into the parameter set of the supplied Transformer.

Parameters:: model - merged output Map (never null); transformer - the target transformer

configureResponse

protected void configureResponse(Map model,
                                 HttpServletResponse response,
                                 Transformer transformer)

Configure the supplied HttpServletResponse.

The default implementation of this method sets the content type and encoding from the "media-type" and "encoding" output properties specified in the Transformer.

Parameters:: model - merged output Map (never null); response - current HTTP response; transformer - the target transformer

createTransformer

protected Transformer createTransformer(Templates templates)
                                 throws TransformerConfigurationException

Create the Transformer instance used to prefer the XSLT transformation.

The default implementation simply calls Templates.newTransformer(), and configures the Transformer with the custom URIResolver if specified.

Parameters:: templates - the XSLT Templates instance to create a Transformer for
Throws:: TransformerConfigurationException

getStylesheetSource

protected Source getStylesheetSource()

Get the XSLT Source for the XSLT template under the configured URL.