DeltaXML/JAXP Pipeline Examples
The following sample programs demonstrate various aspects
of JAXP pipeline construction. This is a work in progress with the aim
of providing a wide range of examples and descriptive text to form a complete
tutorial for this topic.
Dependencies
Some of the example pipelines use the DeltaXML comparator from
the DeltaXML Core API; if you do not already have this software a 2 week
evaluation can be downloaded after registering on this website.
The examples can be compiled and run using a J2SE 1.4 or later
SDK (a javac compiler is needed, so the JRE is not appropriate). The SDK
for a number of platforms is available from
http://java.sun.com
Ant build scripts are provided to make compiling and running the
examples easier. While not compulsory we would recommend using Ant.
It is available from: ant.apache.org.
Finally, some of the example work best using the Saxon XSLT processor.
We recommend using version 6.5.3 available from:
saxon.sourceforge.net.
Pipeline paper
A paper which was developed in conjunction with these examples
will be presented at XML2004 (Washington DC, November 2004).
While this covers a wider range of topics it will be useful reading
in conjunction with the example code
The Examples
You can explore the individual examples listed below
or download pipelines.zip
and unpack all the examples in a single bundle.
Further examples will be added in the coming months, to provide
more coverage of some missing aspects, so please check back here
for future developments.
Stream File The Stream File example is one of the simplest possible pipelines.
It demonstrates how a single JAXP pipeline component can utilize File IO. Stream String This example shows how IO can be performed to and from Java Strings.
This may be useful when strings are associated with an internal storage
buffer for a database or GUI widget. Parser Control Parsers used at the start of a pipeline may need
special configuration of certain types of XML processing.
This example shows how SAX parsers can be configured
and integrated into a pipeline. This example also shows
some aspects of pull-mode processing. Output Control While it is possible to statically configure the final stage
of an XSLT based pipeline component, using the <xsl:output>
statement, it may be necessary to configure aspects such
as indentation at runtime. This example demonstrates
a technique which can be used with triggered and push-mode
pipeline components. Five Stage This example demonstrates how pull-mode, triggered and push-mode
pipeline components can be integrated together. The pipeline consists
of a sequence of 5 XSLT processing stages. Doctype Preservation Some pipeline components are not DOCTYPE aware. This example
demonstrate a technique for determining the input DOCTYPE (using pre-parsing)
and then reinstating it at the end of the pipeline. It borrows some
techniques from the Output and Parser Control examples. |
