AIOTrade Is Migrating to Scala

Finally, after evaluated Erlang, Scala etc, wrote IDE tools for these languages, I began to migrate AIOTrade from Java to Scala, with the help of Scala for NetBeans of course.

The first step is re-writting basic modules to Scala smoothly, with little functional style code; Then, I'll re-design the APIs by Scala's advanced features, including function, trait, actors etc.

Since AIOTrade is a NetBeans suite project, with several NetBeans style modules integrated, I need a general purpose build.xml to get Scala based modules working. Here are build.xml and scala-build.xml, which can be used to write Scala based NetBeans platform modules.

First, you should create a regular NetBeans module project, then put/replace these ant files under your project's base director. You also need to create 2 NetBeans lib wrapper modules, one is for scala-library.jar, another is for scala-compile.jar as parts of your NetBeans suite project (or, check them out from AIOTrade's source repository)

build.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project name="lib.math" default="netbeans" basedir=".">
    <import file="scala-build.xml"/>
</project>

scala-build.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project name="scala-module" default="netbeans" basedir=".">
    <import file="nbproject/build-impl.xml"/>

    <target name="scala-taskdef" depends="init">
        <property name="scala.library" value="${cluster}/modules/ext/scala-library.jar"/>
        <property name="scala.compiler" value="${cluster}/modules/ext/scala-compiler.jar"/>
        <property name="scala.libs" value="${scala.library}:${scala.compiler}"/>

        <echo message="cluster: ${cluster}"/>
        <echo message="Compiling scala sources via ${scala.library}, ${scala.compiler}"/>

        <taskdef resource="scala/tools/ant/antlib.xml">
            <classpath>
                <pathelement location="${cluster}/modules/ext/scala-library.jar"/>
                <pathelement location="${cluster}/modules/ext/scala-compiler.jar"/>
            </classpath>
        </taskdef>
    </target>

    <property name="jar-excludes" value="**/*.java,**/*.form,**/package.html,**/doc-files/,**/*.scala"/>

    <target name="compile" depends="init,up-to-date,scala-taskdef" unless="is.jar.uptodate">
        <!-- javac's classpath should include scala.library and all these paths of "cp" -->
        <path id="javac.cp">
            <pathelement path="${scala.libs}"/>
            <pathelement path="${module.classpath}"/>
            <pathelement path="${cp.extra}"/>
        </path>
        <!-- scalac will check class dependencies deeply, so we can not rely on public package only which is refed by ${module.classpath} -->
        <path id="scalac.cp">
            <pathelement path="${scala.libs}"/>
            <pathelement path="${module.run.classpath}"/>
            <pathelement path="${cp.extra}"/>
        </path>
        <mkdir dir="${build.classes.dir}"/>
        <depend srcdir="${src.dir}" destdir="${build.classes.dir}" cache="build/depcache">
            <classpath refid="scalac.cp"/>
        </depend>
        <!-- scalac -->
        <scalac srcdir="${src.dir}" destdir="${build.classes.dir}" encoding="UTF-8" target="jvm-${javac.target}">
            <classpath refid="scalac.cp"/>
        </scalac>
        <!-- javac -->
        <nb-javac srcdir="${src.dir}" destdir="${build.classes.dir}" debug="${build.compiler.debug}" debuglevel="${build.compiler.debuglevel}" encoding="UTF-8"
                deprecation="${build.compiler.deprecation}" optimize="${build.compiler.optimize}" source="${javac.source}" target="${javac.target}" includeantruntime="false">
            <classpath refid="javac.cp"/>
            <compilerarg line="${javac.compilerargs}"/>
            <processorpath refid="processor.cp"/>
        </nb-javac>
        <!-- Sanity check: -->
        <pathconvert pathsep=":" property="class.files.in.src">
            <path>
                <fileset dir="${src.dir}">
                    <include name="**/*.class"/>
                </fileset>
            </path>
        </pathconvert>
        <fail>
            <condition>
                <not>
                    <equals arg1="${class.files.in.src}" arg2=""/>
                </not>
            </condition>
            You have stray *.class files in ${src.dir} which you must remove.
            Probably you failed to clean your sources before updating them.
        </fail>
        <!-- OK, continue: -->
        <copy todir="${build.classes.dir}">
            <fileset dir="${src.dir}" excludes="${jar-excludes}"/>
        </copy>
    </target>

    <target name="do-test-build" depends="projectized-common.do-test-build">
        <scalac srcdir="${test.unit.src.dir}" destdir="${build.test.unit.classes.dir}" excludes="${test.excludes}"
               encoding="UTF-8">
            <classpath refid="test.unit.cp"/>
        </scalac>
    </target>
</project>

BTW, the new source code of AIOTrade is controlled under Mercurial version control system on sourceforge.net, you can clone or brows the code at: AIOTrade source repository

Note: The whole project can not be successfully built yet.