source: parsers.xml @ 27

<?xml version="1.0" encoding="UTF-8"?>

<!--
  ANT file for generating JFlex/CUP parsers.

  If you want to add a new parser, you basically only need to do the
  following two things:
  - write JFlex and CUP files, i.e., Parser.cup and Scanner.jflex, for your 
    parser and place them in a separated sub-package
  - add an "antcall" to the "parsers" target, with the sub-package as parameter
    (the sub-package your parser files reside in)

  For an example, please refer to the "weka.core.mathematicalexpression" parser.

  URLs:
  - JFlex
    http://jflex.de/
  - CUP
    http://www2.cs.tum.edu/projects/cup/

  Author:  FracPete (fracpete at waikato dot ac dot nz)
  Version: $Revision: 1.2 $
-->

<project name="weka-parsers" default="compile" basedir=".">
   <property name="build.compiler" value="modern" />
   <property name="debug"          value="on" />
   <property name="deprecation"    value="off" />
   <property name="optimization"   value="off" />
   <property name="build"          value="build"/>
   <property name="lib"            value="lib"/>
   <property name="parserpkg"      value="" />
   <property name="src"            value="src/main/java" />

   <path id="project.class.path">
     <fileset dir="${lib}">
       <include name="*.jar"/>
       <include name="*.zip"/>
     </fileset>
     <pathelement location="${build}/classes"/>
     <pathelement path="${java.class.path}" />
   </path>

   <target name="init" description="Initializes the build environment.">
      <!-- initialize Weka -->
      <ant antfile="build.xml" target="init_compile"/>
   </target>

   <target name="compile" depends="init" description="Compiles Weka.">
      <!-- compile Weka -->
      <ant antfile="build.xml" target="compile"/>
      <!-- generate parsers -->
      <antcall target="parsers"/>
      <!-- recompile Weka -->
      <ant antfile="build.xml" target="compile"/>
   </target>
   
   <!-- central target for calling the parser targets -->
   <target name="parsers" depends="init" description="Generates all the parsers subsequently.">
      <antcall target="parser">
         <param name="parserpkg" value="weka/core/mathematicalexpression"/>
      </antcall>
      <antcall target="parser">
         <param name="parserpkg" value="weka/filters/unsupervised/instance/subsetbyexpression"/>
      </antcall>
      <antcall target="parser">
         <param name="parserpkg" value="weka/core/json"/>
      </antcall>
      <!-- add calls for more parsers here -->
   </target>

   <!-- generates a parser situated in the ${parserpkg} sub-package 
        (using Parser.cup and Scanner.jflex). -->
   <target name="parser" description="Generates the parser ${parserpkg}.">
      <echo message="Generating lexer (${parserpkg})."/>
      <java classname="JFlex.Main">
         <classpath refid="project.class.path"/>
         <arg value="--jlex"/>
         <arg value="--quiet"/>
         <arg value="--nobak"/>
         <arg value="--outdir"/>
         <arg value="${src}/${parserpkg}"/>
         <arg value="${src}/${parserpkg}/Scanner.jflex"/>
      </java>
      <echo message="Generating parser (${parserpkg})."/>
      <java classname="java_cup.Main">
         <classpath refid="project.class.path"/>
         <arg value="-parser"/>
         <arg value="Parser"/>
         <arg value="-interface"/>
         <arg value="-destdir"/>
         <arg value="${src}/${parserpkg}"/>
         <arg value="${src}/${parserpkg}/Parser.cup"/>
      </java>
   </target>
</project>