We had problems with the XmlFileInputModule when having Saxon in the
classpath [4]. The reason for that is that both Xalan and Saxon set
the TransformerFactoryImpl via META-INF/services/
javax.xml.transform.TransformerFactory [1] (Java Services API) and
Saxon was in the load order before Xalan in Tomcat.
We solved that by setting the javax.xml.transform.TransformerFactory
system property explicitly to Xalan. This works because
TransformerFactory.newInstance uses the system property before
consulting the Java Services API [1].
I have seen two other workarounds
- removing the META-INF folder within the saxon-X.X.jar [2]
- prefixing the saxon-X.X.jar with z-. Then Tomcat loads it after
Xalan and the TransformerFactory is set by Xalan via the Services API
[3]
The advantage of the system property is that it plays nicely with Maven.
Alex
[1]
http://java.sun.com/javase/6/docs/api/javax/xml/transform/TransformerFactory.html#newInstance()
[2] http://marc.info/?l=xml-cocoon-dev&m=108015075700034&w=2
[3] http://marc.info/?l=xml-cocoon-users&m=122467833601554&w=2
[4] java.lang.IllegalArgumentException: Unknown type of result: class
javax.xml.transform.dom.DOMResult
net
.sf.saxon.event.SerializerFactory.getReceiver(SerializerFactory.java:
154)
net
.sf
.saxon
.IdentityTransformerHandler
.startDocument(IdentityTransformerHandler.java:94)
org
.apache.cocoon.xml.AbstractXMLPipe.startDocument(AbstractXMLPipe.java:
47)
org.apache.xerces.parsers.AbstractSAXParser.startDocument(Unknown
Source)
org.apache.xerces.impl.dtd.XMLDTDValidator.startDocument(Unknown Source)
org.apache.xerces.impl.XMLDocumentScannerImpl.startEntity(Unknown
Source)
org.apache.xerces.impl.XMLVersionDetector.startDocumentParsing(Unknown
Source)
org.apache.xerces.parsers.XML11Configuration.parse(Unknown
Source)
org.apache.xerces.parsers.XML11Configuration.parse(Unknown
Source)
org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown
Source)
org.apache.xerces.jaxp.SAXParserImpl
$JAXPSAXParser.parse(Unknown Source)
org.apache.cocoon.core.xml.impl.JaxpSAXParser.parse(JaxpSAXParser.java:
196)
org
.apache
.cocoon.core.xml.avalon.DefaultSAXParser.parse(DefaultSAXParser.java:47)
org.apache.excalibur.xmlizer.DefaultXMLizer.toSAX(DefaultXMLizer.java:
127)
org
.apache.cocoon.components.source.util.SourceUtil.toSAX(SourceUtil.java:
180)
org
.apache.cocoon.components.source.util.SourceUtil.toDOM(SourceUtil.java:
318)
org.apache.cocoon.components.modules.input.XMLFileModule
$DocumentHelper.getDocument(XMLFileModule.java:178)
org
.apache
.cocoon
.components
.modules.input.XMLFileModule.getContextObject(XMLFileModule.java:380)
org
.apache
.cocoon
.components
.modules.input.XMLFileModule.getAttribute(XMLFileModule.java:402)
org
.apache
.cocoon
.components
.modules.input.XMLFileModule.getAttribute(XMLFileModule.java:391)
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