How to write for task (i.e. check several headers files by class files or java files)?

[Lev Serebryakov <le...@serebryakov.spb.ru>]

Hello, User.

 I  want  to check do I need to run <javah> task or not to re-generate
header files for classes, which contains native methods. I want to use
pure Ant 1.8.x, cross-platform.

 What I have as input:

  (1) Property with path to Java source tree, "path.src"
  (2) Property with path where <javac> task creates classes,
  "path.classes"
  (3) Property with path where header files live "path.native"
  (4) List of classes with native methods, as comma-separated list in
  one property "classes.native", like "my.package.impl.Class1,
  my.packahe.impl.Class2".

 What I want as output:

   Property "native.skip" set to "true" if every header file with name
 like "${path.native}/my_package_impl_Class1.h" is newer than java
 file "${path.src}/my/package/impl/Class1.java" or, alternatively, it
 is newer than "${path.classes}/my/package/impl/Class1.class".

  Please note: I have SEVERAL classes in my list! With single class
 task is relativetely easy!

 What have I tried so far:

  (1)
    First transform class list to two file lists (as strings,
  comma-separated, not <filelist>/<fileset>!), one with paths to
  java sources, one with paths to headers. It works with some
  <loadresource>/<propertysource>/<filterchain> magic (very, very
  ugly, but it works).

   Then I pass  such "list" of sources to <srcfile includes=""> for
  <uptodate> and it seems to work, but such "list" as
  <uptodate targetfile> doesn't for for sure: Verbose/debug output
  says:

[uptodate] The targetfile "<full-path>/<name-1>.h,<relative-path>/<name-2>.h" does not exist.

  (2)
    Then I tried to construct list of headers on-the-fly with <mapper>
  inside <uptodate>. And failed completely, as I could use
  <packagemapper> to convert from path to dotted-delimetered name of
  file, but after that I could not convert dots to underscores, as
  <regexpmapper> require FULL name in "to" attribute, not only
  replacement. And, yes, what should I do if my paths contains dots!?
  It will break everything!

  What should I do?

  And other question: is here any way to get list of needed classes
 automagically? Search all files with "native" word is not a solution,
 as this word could present in comments and JavaDocs of other classes,
 without native methods!

-- 
// Black Lion AKA Lev Serebryakov <le...@serebryakov.spb.ru>


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Re: How to write for task (i.e. check several headers files by class files or java files)?

[Lev Serebryakov <le...@serebryakov.spb.ru>]

Hello, Ant.
You wrote 4 мая 2013 г., 12:08:41:

LS>   (2)
LS>     Then I tried to construct list of headers on-the-fly with <mapper>
LS>   inside <uptodate>. And failed completely, as I could use
LS>   <packagemapper> to convert from path to dotted-delimetered name of
LS>   file, but after that I could not convert dots to underscores, as
LS>   <regexpmapper> require FULL name in "to" attribute, not only
LS>   replacement. And, yes, what should I do if my paths contains dots!?
LS>   It will break everything!
 Ok, this construction works:

<loadresource property="java.sources.with.native">
  <propertyresource name="classes.native" />
  <filterchain>
    <tokenfilter>
      <stringtokenizer delims=","/>
      <replacestring from="." to="/"/>
      <replaceregex pattern="$$" replace=".java" />
    <tokenfilter>
  <filterchain>
<loadresource>
<uptodate property="javah.skip">
  <srcfiles dir="${path.src}/src" includes="${java.sources.with.native}" />
  <chainedmapper>
    <packagemapper from="*.java" to="${path.native}/*" />
    <filtermapper>
      <replacestring from="." to="_" />
      <suffixlines suffix=".h" />
    <filtermapper>
  </chainedmapper>
</uptodate>



-- 
// Black Lion AKA Lev Serebryakov <le...@serebryakov.spb.ru>


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