Oops... this might be what you are after instead...
executeChildTemplatesToXML or ToString or ToXMLString
may be what you are after..
/**
* A repository for common functions that can be used but the extension
* functions and extension elements.
*
*
* Title: Base Functions
* Copyright: Copyright (c) 2005
* Company: Eye Catching Solutions Inc.
* @version 1.0
* @author John Gentilin
*/
public class BaseFunctions
{
private static Category m_Log =
Category.getInstance("RapidXSL.Interface");
private static DocumentBuilderFactory m_dfactory = null;
private static DocumentBuilder m_docBuilder = null;
/**
* @param context
* @param elem
* @throws TransformerException
*/
protected void executeChildTemplates( XSLProcessorContext context,
ElemExtensionCall elem ) throws TransformerException
{
TransformerImpl transf = context.getTransformer();
transf.executeChildTemplates(elem,
context.getContextNode(),
context.getMode(), transf.getResultTreeHandler());
}
/**
* @param context
* @param elem
* @throws TransformerException
*/
protected Document executeChildTemplatesToXML(Document doc,
XSLProcessorContext context, ElemExtensionCall elem ) throws
XMLServerException
{
DOMBuilder builder = null;
TransformerImpl transformer = context.getTransformer();
try
{
builder = new DOMBuilder(doc);
transformer.executeChildTemplates(elem,
context.getContextNode(),
context.getMode(), builder);
}
catch (Exception e)
{
throw new XMLServerException("RXSL_IFACE", "XSL Interface Error -
" + e.getLocalizedMessage());
}
return doc;
}
/**
* @param context
* @param elem
* @throws TransformerException
*/
protected String executeChildTemplatesToString(XSLProcessorContext
context, ElemExtensionCall elem ) throws XMLServerException
{
TransformerImpl transformer = context.getTransformer();
try
{
TextSerializationHandler handler = new TextSerializationHandler();
transformer.executeChildTemplates(elem,
context.getContextNode(),
context.getMode(), handler);
return handler.toString();
}
catch (Exception e)
{
throw new XMLServerException("RXSL_IFACE", "XSL Interface Error -
" + e.getLocalizedMessage());
}
}
protected String executeChildTemplatestoXMLString(XSLProcessorContext
context, ElemExtensionCall elem)
throws TransformerException, SAXException
{
try
{
TransformerImpl transformer = context.getTransformer();
// This should be worked on so that the output format can be
// defined by a first child of the redirect element.
OutputProperties format = transformer.getOutputFormat();
Properties prop = format.getProperties();
format.setProperty("indent","no");
format.setProperty("{http://xml.apache.org/xalan}indent-amount","0";);
ByteArrayOutputStream ostream = new ByteArrayOutputStream();
SerializationHandler serializer =
transformer.createSerializationHandler(
new StreamResult(ostream),
format);
serializer.startDocument();
transformer.executeChildTemplates(elem,
context.getContextNode(),
context.getMode(), serializer);
serializer.flushPending();
serializer.endDocument();
return ostream.toString("ISO-8859-1");
}
catch (UnsupportedEncodingException e)
{
m_Log.fatal("Error Encoding Bytes from XML - " +
e.getLocalizedMessage());
return new String();
}
}
/**
* Get the Node Value of a Stylesheet Element. This will be used to
collect
* the data value when populating a Control.....
*
* @return
*/
protected String getNodeValue( ElemExtensionCall elem )
{
Node child = elem.getFirstChild();
if (child != null)
{
return child.getNodeValue();
}
return null;
}
/**
* Resolve the Attribute Selection for the fixed attribute "select"
*
* @return
* @throws TransformerException
*/
protected String getStringValueFromSelectExpr(XSLProcessorContext
context, ElemExtensionCall elem ) throws TransformerException
{
return getStringValueFromAttribute("select", context, elem);
}
/**
* Find the Attribute named "attrib" and convert that to an XPath statement
* that can be executed.
*
* Return null if the Attribute did not exist.
*
* @param attrib
* @return
* @throws TransformerException
*/
protected static XPath getAttributeExpr( String attrib,
XSLProcessorContext context, ElemExtensionCall elem ) throws
TransformerException
{
String expr =
elem.getAttribute (attrib,
context.getContextNode(),
context.getTransformer());
if(null != expr)
{
org.apache.xpath.XPathContext xctxt
= context.getTransformer().getXPathContext();
return new XPath(
expr,
elem,
xctxt.getNamespaceContext(), XPath.SELECT);
}
return null;
}
/**
*
* Get the value of an Attribute. It will first try to treat the
attribute as an XPath
* if that fails then just return the attribute value itself.
*
* @param attrName
* @param context
* @param elem
* @return
*/
protected String getStringValueFromAttribute( String attrName,
XSLProcessorContext context, ElemExtensionCall elem )
{
XPath path;
String value = null;
try
{
path = getAttributeExpr(attrName, context, elem);
if (path != null)
{
XObject data = executeXPath(path, context, elem);
if (data != null) value = data.xstr().toString();
}
}
catch (TransformerException e)
{
value = elem.getAttribute(attrName);
}
if (value == null) value = "";
return value;
}
/**
* A helper function to execute an XPath Object.
*
* @param path
* @return
* @throws TransformerException
*/
protected static XObject executeXPath( XPath path, XSLProcessorContext
context, ElemExtensionCall elem ) throws TransformerException
{
org.apache.xpath.XPathContext xctxt
= context.getTransformer().getXPathContext();
return path.execute(xctxt, context.getContextNode(), elem);
}
protected Document getEmptyDocument()
{
initDocFactory();
return m_docBuilder.newDocument();
}
protected static void initDocFactory()
{
if (m_dfactory != null) return;
try
{
m_dfactory = DocumentBuilderFactory.newInstance();
m_docBuilder = m_dfactory.newDocumentBuilder();
}
catch (Exception e)
{
m_Log.fatal("RapidXSL Interface, failure to init XML Subsystem - "
+ e.getLocalizedMessage());
}
}
}
Cynepnaxa wrote:
Hi, everybody!
I start to write simple extension element, but a problem occurs. I want to
access extension element's subelements in java+xalan. My xsl contains
following block of code:
<my-ext:request>
<body><xsl:value-of select="$body"/></body>
<contentType>text/html</contentType>
<metaData><![CDATA[<?xml version="1.0" encoding="utf-8"?>]]><metaData>
<xsl:value-of select="$metaData"/>
</metaData>
</metaData>
</my-ext:request>
In extension element Java-method i have "XSLProcessorContext context" and
"ElemExtensionCall elem". I can get contentType by calling for example
"elem.getFirstChild().getNextSibling().getFirstChild().getTextContent()",
but i want to access subelements by tag name(for example, by
elem.getElementsByTagName("metadata"), or XPath). I have no idea how to
access in java content of $body variable and xml - encapsulated $metaData.
All google - examples shining no light. Is simple xslt - subelements access
method exist? Big thanx for help.
P.S. Sorry for my English. I hope you understand me.
