-------- Original Message --------
Subject: Re: Remove duplicate JAR file names from an XML file
From: <jan.mate...@rzf.fin-nrw.de>
To: user@ant.apache.org
Date: 27.07.2010 08:32
>> I have an xml file which lists JAR file names in it with space
>> specified as a delimiter. There are duplications of JAR files
>> name in the file and I was wondering if there is a way to some
>> how get ride of the duplication, to get a file which has a
>> unique set of JAR file names?
>>
>>
>> Example of file:
>>
>> antlr-2.7.6.jar antlr-2.7.6.jar antlr-2.7.6.jar
>> aopalliance-1.0.jar aopalliance-1.0.jar aopalliance-1.0.jar
>> commons-validator-1.0.2.jar commons-validator-1.0.2.jar
>> commons-lang-2.2.jar commons-lang-2.2.jar
Whenever some kind of xml processing occurs within your ant workflow
i recommend the use of the xmltask[1].
Two solutions for your problem
>From your first posting i assume you have some xml like :
<?xml version="1.0" encoding="UTF-8"?>
<jars>
<files>antlr-2.7.6.jar antlr-2.7.6.jar antlr-2.7.6.jar
aopalliance-1.0.jar aopalliance-1.0.jar aopalliance-1.0.jar
commons-validator-1.0.2.jar commons-validator-1.0.2.jar
commons-lang-2.2.jar commons-lang-2.2.jar</files>
</jars>
1) use xmltask/xpath to get a list of filenames and <script ../>
afterwards to get your distinct list.
<?xml version="1.0" encoding="UTF-8"?>
<project>
<!-- Import XMLTask -->
<taskdef name="xmltask"
classname="com.oopsconsultancy.xmltask.ant.XmlTask"/>
<target name="depends">
<xmltask source="./jars.xml">
<copy path="//files/text()"
append="true"
property="alljars"
/>
</xmltask>
<echo>${alljars}</echo>
<script language="beanshell">
<![CDATA[
String[] jars = project.getProperty("alljars").split(" ");
Set set = new HashSet(Arrays.asList(jars));
String[] distinct = (set.toArray(new String[set.size()]));
project.setProperty("uniquejars", Arrays.toString(distinct));
]]>
</script>
</target>
<target name="main" depends="depends">
<echo>$${uniquejars} = ${uniquejars}${line.separator}</echo>
<echo>$${alljars} = ${alljars}</echo>
</target>
</project>
Buildfile: /workspace/ant/foobar.xml
depends:
[xmltask] Cannot append values to properties
[echo] antlr-2.7.6.jar antlr-2.7.6.jar antlr-2.7.6.jar
aopalliance-1.0.jar aopalliance-1.0.jar aopalliance-1.0.jar
commons-validator-1.0.2.jar commons-validator-1.0.2.jar
commons-lang-2.2.jar commons-lang-2.2.jar
main:
[echo] ${uniquejars} = [antlr-2.7.6.jar, commons-lang-2.2.jar
[echo] , aopalliance-1.0.jar, commons-lang-2.2.jar,
commons-validator-1.0.2.jar]
[echo] ${alljars} = antlr-2.7.6.jar antlr-2.7.6.jar antlr-2.7.6.jar
aopalliance-1.0.jar aopalliance-1.0.jar aopalliance-1.0.jar
commons-validator-1.0.2.jar commons-validator-1.0.2.jar
commons-lang-2.2.jar commons-lang-2.2.jar
BUILD SUCCESSFUL
Total time: 902 milliseconds
2) take influence on the creation of the xml file if possible,
and create a structure that is more xpath suitable and simply make use
of xpath, f.e.
<?xml version="1.0" encoding="UTF-8"?>
<jars>
<file>antlr-2.7.6.jar</file>
<file>aopalliance-1.0.jar</file>
<file>antlr-2.7.6.jar</file>
<file>commons-validator-1.0.2.jar</file>
<file>commons-validator-1.0.2.jar</file>
<file>commons-lang-2.2.jar</file>
<file>whatever-0.0.1</file>
<file>commons-lang-2.2.jar</file>
<file>whatever-0.0.1</file>
<file>aopalliance-1.0.jar</file>
</jars>
with some xpath[2] tricks (sadly XPATH 2.0 => distinct-value(...)
doesn't work) :
<?xml version="1.0" encoding="UTF-8"?>
<project>
<!-- Import XMLTask -->
<taskdef name="xmltask"
classname="com.oopsconsultancy.xmltask.ant.XmlTask"/>
<target name="depends">
<xmltask source="./jars.xml">
<copy path="//file/text()"
append="true"
property="alljars"
propertyseparator="${line.separator}"
/>
<copy path="//file/text()[not(preceding::file/text() = .)]"
append="true"
property="jars"
propertyseparator="${line.separator}"
/>
</xmltask>
</target>
<target name="main" depends="depends">
<echo>--- $${alljars} ---${line.separator}${alljars}</echo>
<echo>${line.separator}--- $${jars} ---${line.separator}${jars}</echo>
</target>
</project>
you'll get your distinct list :
Buildfile: /workspace/ant/foobar.xml
depends:
[xmltask] Cannot append values to properties
... don' get annoyed from those messages, simply ignore
or do a search in the xmlproperty task sources and comment it out
main:
[echo] --- ${alljars} ---
[echo] antlr-2.7.6.jar
[echo] aopalliance-1.0.jar
[echo] antlr-2.7.6.jar
[echo] commons-validator-1.0.2.jar
[echo] commons-validator-1.0.2.jar
[echo] commons-lang-2.2.jar
[echo] whatever-0.0.1
[echo] commons-lang-2.2.jar
[echo] whatever-0.0.1
[echo] aopalliance-1.0.jar
[echo]
[echo] --- ${jars} ---
[echo] antlr-2.7.6.jar
[echo] aopalliance-1.0.jar
[echo] commons-validator-1.0.2.jar
[echo] commons-lang-2.2.jar
[echo] whatever-0.0.1
BUILD SUCCESSFUL
Total time: 603 milliseconds
[1] http://www.oopsconsultancy.com/software/xmltask/
[2] http://www.zvon.org/xxl/XPathTutorial/General/examples.html
Regards, Gilbert
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