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| Warning |
Ejen documentation for 1.1 distribution is not fully completed. Ejen
node documentation is available here. For extensions
and specialized XMLReaders/DocumentBuilders, you will need to look at the various
examples and to download the source release.
Current documentation is included in the binary distribution.
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| Ejen task |
Ejen is implemended for now as an Ant task. However, because it is not
integrated to built-in or optional tasks distributed with Ant, you must define
the task prior to use it:
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| build.xml |
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<?xml version="1.0" encoding="UTF-8"?>
<project name="build" default="build">
<taskdef name="ejen" classname="org.ejen.ant.Ejen"/>
<target name="build">
<ejen>
...
</ejen>
</target>
</project> |
Here, "taskdef" node defines the org.ejen.ant.Ejen class as an ant
task that will be used between <ejen>...</ejen> nodes
in the build file.
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| A very basic example |
Suppose you want to generate several letters with the same content (except the name
of the person to whom the letter will be send). This example is available in
examples (see ejen-***/examples/simples/letters).
First, we need obviously a source XML file with all person names:
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| persons.xml |
|---|
<?xml version="1.0" encoding="iso-8859-1"?>
<persons>
<name>John Smith</name>
<name>Bonnie Parker</name>
<name>Clide Barrow</name>
...
</persons> |
Then, because we don't need any filter in this very basic example, we simply
write the following template:
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| letter.xsl |
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<?xml version="1.0" encoding="iso-8859-1"?>
<xsl:stylesheet
version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text" encoding="iso-8859-1"/>
<xsl:template match="name">
Dear <xsl:value-of select="."/>,
Obviously, you are reading a meaningless letter.
Best regards.
</xsl:template>
</xsl:stylesheet> |
Finally, we set up the Ant build file generation process:
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| generate.xml |
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<?xml version="1.0" encoding="UTF-8"?>
<project name="letters" default="letters">
<taskdef name="ejen" classname="org.ejen.ant.Ejen"/>
<target name="letters">
<ejen>
<source uri="persons.xml"/>
<foreach select="/persons/name">
<template uri="letter.xsl" save="{.}.txt"/>
</foreach>
</ejen>
</target>
</project> |
If we run this example, we will get text files named "John Smith.txt",
"Bonnie Parker.txt", "Clide Barrow.txt", ... For example, the
"John Smith.txt" file will look like:
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| John Smith.txt |
|---|
Dear John Smith,
Obviously, you are reading a meaningless letter.
Best regards. |
This example only shows two features of Ejen: you can apply an XSL stylesheet not
only to the entire XML tree in memory (loaded by the "source" node), but also,
by iteration ("foreach" node), to a set of sub-nodes of this tree ;
you may use AVTs (Attribute Value Template) in order to specify dynamically
an Ejen node attribute ("save" attribute of the "template" node).
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| Ejen sources compilation |
You must install ejen-src-***.zip AND ejen-bin-***.zip
archives. It seems strange
to need the binaries in order to compile the sources... But you
must do it, because the sources compilation needs jar archives that only come
with the binary distribution.
You may compile the Ejen sources by the mean of the ./build (Unix)
or build.bat (Windows) command (in the ejen-*** directory)
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