return hasExtension(input, ".java");
    }

    private void resolveNonStringsInCompilerArgs(JavaCompileSpec spec) {
        // in particular, this is about GStrings
        spec.getCompileOptions().setCompilerArgs(CollectionUtils.toStringList(spec.getCompileOptions().getCompilerArgs()));
    }

    private void logSourceFiles(JavaCompileSpec spec) {
        if (!spec.getCompileOptions().isListFiles()) {
            return;

        }
    }

    private void resolveNonStringsInCompilerArgs(ScalaJavaJointCompileSpec spec) {
        // in particular, this is about GStrings
        spec.getCompileOptions().setCompilerArgs(CollectionUtils.toStringList(spec.getCompileOptions().getCompilerArgs()));
    }

    private void logSourceFiles(ScalaJavaJointCompileSpec spec) {
        if (!spec.getScalaCompileOptions().isListFiles()) {

    }

    private void resolveNonStringsInCompilerArgs(GroovyJavaJointCompileSpec spec) {
        // in particular, this is about GStrings
        spec.getCompileOptions().setCompilerArgs(CollectionUtils.toStringList(spec.getCompileOptions().getCompilerArgs()));
    }

    private void logSourceFiles(GroovyJavaJointCompileSpec spec) {
        if (!spec.getGroovyCompileOptions().isListFiles()) {

    public void setSourcepath(List<File> sourcepath) {
        this.sourcepath = sourcepath;
    }

    public List<String> getCompilerArgs() {
        return compilerArgs;
    }

    public void setCompilerArgs(List<String> compilerArgs) {
        this.compilerArgs = compilerArgs;
    }

    @Nullable
    public String getEncoding() {
        return encoding;
    }

        return compilerArgumentProviders;
    }

    /**
     * Sets any additional arguments to be passed to the compiler.
     * Defaults to the empty list.
     */
    public void setCompilerArgs(List<String> compilerArgs) {
        this.compilerArgs = compilerArgs;
    }

    /**
     * Convenience method to set {@link ForkOptions} with named parameter syntax.