Try to create a build.xml for my project. Right now I am trying to
avoid build one file, SupplierClient.java, as it imports a non-existing
package, "com.bank.database". But somehow, this java file is still
being built, and leaves me lots of errors. I do not have
com/bank/database in my source tree. Can somebody help me to find out
why. Thanks a lot !

Here is the highlights of my build.xml file.

<project name="testng" default="all" basedir=".">
  .......
   <selector id="reason.notReady" >
    <or>
       <filename name="com/bank/domain/supplier/SupplierClient.java"
/>
    </or>
  </selector>
  ....
  <target name="check_for_package">
      <available property="database.present"
classname="com.bank.database" classpathref="runtime.cp" />
       ...
  </target>
  <target  build depends="prepare, check_for_package">
        <javac   srcdir="${src.dir}"
             destdir="${classes}"
             debug="true"
             optimize="{optimize}">
       <classpath refid="runtime.cp"/>
     <selector id="conditional-patterns">
         <not><or>
                <selector refid="reason.notReady"
unless="database.present"/>
         </or></not>
     </selector>
   </javac>
</target>