protected void preProcessArchive()

in src/main/java/org/apache/maven/plugins/jarsigner/JarsignerSignMojo.java [258:266]


    protected void preProcessArchive(final File archive) throws MojoExecutionException {
        if (removeExistingSignatures) {
            try {
                JarSignerUtil.unsignArchive(archive);
            } catch (IOException e) {
                throw new MojoExecutionException("Failed to unsign archive " + archive + ": " + e.getMessage(), e);
            }
        }
    }