org.apache.commons.jelly.tags.xml
Class TransformTag

java.lang.Object
  org.apache.commons.jelly.TagSupport
      org.apache.commons.jelly.tags.xml.ParseTagSupport
          org.apache.commons.jelly.tags.xml.ParseTag
              org.apache.commons.jelly.tags.xml.TransformTag

All Implemented Interfaces:

Tag

public class TransformTag
extends ParseTag

A tag which parses some XML, applies an xslt transform to it and defines a variable with the transformed Document. The XML can either be specified as its body or can be passed in via the xml property which can be a Reader, InputStream, URL or String URI. The XSL can be passed in via the xslt property which can be a Reader, InputStream, URL or String URI.

Version:

$Revision: 155420 $

Author:

Robert Leftwich

Field Summary

Fields inherited from class org.apache.commons.jelly.TagSupport

body, context, parent

Constructor Summary

TransformTag()
Constructor for TransformTag.

Method Summary

protected javax.xml.transform.Result	createSAXResult(XMLOutput output) Factory method to create a new SAXResult for the given XMLOutput so that the output of an XSLT transform will go directly into the XMLOutput that we are given.
protected javax.xml.transform.URIResolver	createURIResolver() Creates a new URI Resolver so that URIs inside the XSLT document can be resolved using the JellyContext
protected org.xml.sax.XMLReader	createXMLReader() Factory method to create a new XMLReader for this tag so that the input of the XSLT transform comes from either the xml var, the nested tag or the tag body.
void	doTag(XMLOutput output) Process this tag instance
protected org.xml.sax.InputSource	getInputSourceFromObj(java.lang.Object sourceObj) Helper method to get an xml input source for the supplied object
protected javax.xml.transform.sax.SAXSource	getObjAsSAXSource(java.lang.Object saxSourceObj) Helper method to convert the specified object to a SAX source
protected org.xml.sax.InputSource	getXMLInputSource() Helper method to get the appropriate xml input source so that the input of the XSLT transform comes from either the xml var, the nested tag or the tag body.
java.lang.Object	getXslt() Gets the source of the XSL which is either a String URI, Reader or InputStream
void	setParameterValue(java.lang.String name, java.lang.Object value)
void	setXslt(java.lang.Object xslt) Sets the source of the XSL which is either a String URI, Reader or InputStream

Methods inherited from class org.apache.commons.jelly.tags.xml.ParseTag

createSAXReader, getValidate, getXml, getXmlDocument, setValidate, setXml

Methods inherited from class org.apache.commons.jelly.tags.xml.ParseTagSupport

getSAXReader, getText, getVar, parse, parseBody, parseText, setSAXReader, setText, setVar

Methods inherited from class org.apache.commons.jelly.TagSupport

findAncestorWithClass, findAncestorWithClass, findAncestorWithClass, findAncestorWithClass, findAncestorWithClass, findAncestorWithClass, getBody, getBodyText, getBodyText, getContext, getParent, invokeBody, isEscapeText, isTrim, setBody, setContext, setEscapeText, setParent, setTrim, trimBody

Methods inherited from class java.lang.Object

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

Constructor Detail

TransformTag

public TransformTag()

Constructor for TransformTag.

Method Detail

doTag

public void doTag(XMLOutput output)
           throws MissingAttributeException,
                  JellyTagException

Process this tag instance

Specified by:

doTag in interface Tag

Overrides:

doTag in class ParseTag

Parameters:

output - The pipeline for xml events

Throws:

java.lang.Exception - - when required attributes are missing

MissingAttributeException

JellyTagException

getXslt

public java.lang.Object getXslt()

Gets the source of the XSL which is either a String URI, Reader or InputStream

setXslt

public void setXslt(java.lang.Object xslt)

Sets the source of the XSL which is either a String URI, Reader or InputStream

Parameters:

xslt - The source of the xslt

setParameterValue

public void setParameterValue(java.lang.String name,
                              java.lang.Object value)

createURIResolver

protected javax.xml.transform.URIResolver createURIResolver()

Creates a new URI Resolver so that URIs inside the XSLT document can be resolved using the JellyContext

Returns:

a URI Resolver for the JellyContext

createSAXResult

protected javax.xml.transform.Result createSAXResult(XMLOutput output)

Factory method to create a new SAXResult for the given XMLOutput so that the output of an XSLT transform will go directly into the XMLOutput that we are given.

Parameters:

output - The destination of the transform output

Returns:

A SAXResult for the transfrom output

createXMLReader

protected org.xml.sax.XMLReader createXMLReader()
                                         throws org.xml.sax.SAXException

Factory method to create a new XMLReader for this tag so that the input of the XSLT transform comes from either the xml var, the nested tag or the tag body.

Returns:

XMLReader for the transform input

Throws:

org.xml.sax.SAXException - If the value of the "org.xml.sax.driver" system property is null, or if the class cannot be loaded and instantiated.

getXMLInputSource

protected org.xml.sax.InputSource getXMLInputSource()

Helper method to get the appropriate xml input source so that the input of the XSLT transform comes from either the xml var, the nested tag or the tag body.

Returns:

InputSource for the transform input

getObjAsSAXSource

protected javax.xml.transform.sax.SAXSource getObjAsSAXSource(java.lang.Object saxSourceObj)

Helper method to convert the specified object to a SAX source

Returns:

SAXSource from the source object or null

getInputSourceFromObj

protected org.xml.sax.InputSource getInputSourceFromObj(java.lang.Object sourceObj)

Helper method to get an xml input source for the supplied object

Returns:

InputSource for the object or null