ant-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Gilbert Rebhan <gil...@maksimo.de>
Subject Re: Remove duplicate JAR file names from an XML file
Date Fri, 30 Jul 2010 22:47:39 GMT
-------- Original Message  --------
Subject: Re: Remove duplicate JAR file names from an XML file
From: <Jan.Materne@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




---------------------------------------------------------------------
To unsubscribe, e-mail: user-unsubscribe@ant.apache.org
For additional commands, e-mail: user-help@ant.apache.org


Mime
View raw message