private String message(SAXParseException e) {
            return "Invalid XML according to XML schema, error in " + fileName + ": " +
                    Exceptions.toMessageString(e)
                    + " [" + e.getLineNumber() + ":" + e.getColumnNumber() + "]" +
                    ", input:\n" + getErrorContext(e.getLineNumber());
        }
Initializes the validator by using the given file as schema file

@param schemaFile schema file
@throws IOException if it is not possible to read schema files
config-application-package/src/main/java/com/yahoo/config/model/application/provider/SchemaValidator.java