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JAXP property Resin class
javax.xml.parsers.DocumentBuilderFactory com.caucho.xml.parsers.XmlDocumentBuilderFactory
javax.xml.parsers.DocumentBuilderFactory com.caucho.xml.parsers.HtmlDocumentBuilderFactory
javax.xml.parsers.DocumentBuilderFactory com.caucho.xml.parsers.LooseXmlDocumentBuilderFactory
javax.xml.parsers.DocumentBuilderFactory com.caucho.xml.parsers.LooseHtmlDocumentBuilderFactory
javax.xml.parsers.SAXParserFactory com.caucho.xml.parsers.XmlSAXParserFactory
javax.xml.parsers.SAXParserFactory com.caucho.xml.parsers.HtmlSAXParserFactory
javax.xml.parsers.SAXParserFactory com.caucho.xml.parsers.LooseXmlSAXParserFactory
javax.xml.parsers.SAXParserFactory com.caucho.xml.parsers.LooseHtmlSAXParserFactory
JAXP property Resin class
javax.xml.transform.TransformerFactory com.caucho.xsl.Xsl

Usually Resin will use its XML parsers and fast XSLT transformer. Sometimes placement of certain jars in the classpath causes problems. system-property can be used to explicitly set the Resin XML and XSLT implementation classes.

<!-- xml --> <system-property javax.xml.parsers.DocumentBuilderFactory= "com.caucho.xml.parsers.XmlDocumentBuilderFactory"/> <system-property javax.xml.parsers.SAXParserFactory= "com.caucho.xml.parsers.XmlSAXParserFactory"/> <!-- xslt --> <system-property javax.xml.transform.TransformerFactory= "com.caucho.xsl.Xsl"/>

The Sun JDK 1.5 includes the Xerces and Xalan JAXP implementations packaged under a different name.

<web-app> <!-- xml --> <system-property javax.xml.parsers.DocumentBuilderFactory= "com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl"/> <system-property javax.xml.parsers.SAXParserFactory= "com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl"> <!-- xslt --> <system-property javax.xml.transform.TransformerFactory= "com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl"/> </web-app>

JAXP system properties are used to specify the XML and XSLT implementations that are used. Resin defaults to using it's own XML parsers and fast XSLT transformer. Other implementations are used with the specification of the appropriate system properties and values.

Examples of using for commonly used alternative XML parsers and XSLT transformers are in separate sections below. The system property configuration tags can be placed at the or the level.

<web-app> <!-- xml --> <system-property javax.xml.parsers.DocumentBuilderFactory= "..."/> <system-property javax.xml.parsers.SAXParserFactory= "..."/> <!-- xslt --> <system-property javax.xml.transform.TransformerFactory= "..."/> </web-app> <server> <!-- xml --> <system-property javax.xml.parsers.DocumentBuilderFactory= "..."/> <system-property javax.xml.parsers.SAXParserFactory= "..."/> <!-- xslt --> <system-property javax.xml.transform.TransformerFactory= "..."/> </server>

Setting system properties for alternative libraries requires that the implementation classes, usually in a .jar file, are available in the classpath.

The implementation classes are available for a single web application when the jar file(s) are placed in `WEB-INF/lib`. Since other web-apps do not see these libraries, this allows you to isolate a particular version of a particular implementation for use by the web-app. It is not uncommon for a new version of these jar files to introduce problems with existing code.

If the `system-property` is being set at the server level, then the jar files containing the implementation classes need to be placed in `$RESIN_HOME/lib`. This is also a convenient location for placement if you want to avoid putting the libraries in `WEB-INF/lib` for every web application. Any jars placed in `$RESIN_HOME/lib` are avaialable for all web applications.

<!-- xml --> <system-property javax.xml.parsers.DocumentBuilderFactory= "org.apache.xerces.jaxp.DocumentBuilderFactoryImpl"/> <system-property javax.xml.parsers.SAXParserFactory= "org.apache.xerces.jaxp.SAXParserFactoryImpl"/> <!-- xslt --> <system-property javax.xml.transform.TransformerFactory= "org.apache.xalan.processor.TransformerFactoryImpl"/>

Cocoon users may need the following:

<system-property org.xml.sax.driver= "org.apache.xerces.parsers.SAXParser"/>

Put your xerces and xalan jar files in `WEB-INF/lib`, or to have them available to all of your applications put them in `$RESIN_HOME/lib`.

Crimson is the xml parser that is included with JDK 1.4.

<!-- xml --> <system-property javax.xml.parsers.DocumentBuilderFactory= "org.apache.crimson.jaxp.DocumentBuilderFactoryImpl"/> <system-property javax.xml.parsers.SAXParserFactory= "org.apache.crimson.jaxp.SAXParserFactoryImpl"/>
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