CODEWITHSUNDEEP
gwtgwt-compiler
Abin Manathoor Devasia
Abin Manathoor Devasia

Reputation: 1973

How to compile GWT project programmatically from a Java Application?

I need to compile a GWT project from Java App. So i created a Compiler instance with CompilerOptions which sets output directories etc.

My code is like this:

 Compiler compiler=new Compiler(new CompilerOptions() {......
....
}

   ModuleDef def=new ModuleDef("sampleweb");
            def.clear();
            def.addSourcePackage("D:\\projects\\sampleweb\\src\\com\\sample\\web", new String[]{"client"}, new String[]{}, new String[]{}, true, false);
            def.addGwtXmlFile(new File("D:\\projects\\sampleweb\\src\\com\\sampleweb\\web\\Sampleweb.gwt.xml"));
            TreeLogger logger=new SwingTreeLogger(new SwingLoggerPanel(Type.ALL, new File("x.txt")));
            compiler.run(logger,def);

When the compiler.run is called, a NullPointerException as shown is thrown

Exception in thread "main" java.lang.NullPointerException
    at com.google.gwt.dev.cfg.ModuleDef.getCompilationState(ModuleDef.java:373)
    at com.google.gwt.dev.Precompile.precompile(Precompile.java:246)
    at com.google.gwt.dev.Precompile.precompile(Precompile.java:229)
    at com.google.gwt.dev.Precompile.precompile(Precompile.java:141)
    at com.google.gwt.dev.Compiler.run(Compiler.java:232)
    at com.asklepian.TestApp.Starter.main(Starter.java:400)

How should I configure compiler?

Upvotes: 1

Views: 555

Answers (1)

Michael von Wenckstern
Michael von Wenckstern

Reputation: 36

I would create just the Java source code and the XML module code, and than execute a Java process who calls the GWT compiler. The GWT compiler is located at com.google.gwt.dev.Compiler, and you can execute it in Windows from the DOS command shell with the java command. The only parameter the compiler needs is the GWT module Location (the location of the module xml file).

Upvotes: 0

Related Questions