String subjectString = System.getProperty("org.gradle.internal.dm.trace.excludes", Subject.all.toString());
        return Subject.valueOf(subjectString.toLowerCase());
    }

    public static ExcludeFactory maybeLog(ExcludeFactory factory) {
        if (LOGGER.isDebugEnabled()) {
            return new LoggingExcludeFactory(factory);
        }
        return factory;
    }

    @Override

    private final ExcludeFactory factory = new OptimizingExcludeFactory(// optimizes for nulls, 2-params, ... mandatory
        new CachingExcludeFactory(// caches the result of TL operations
            LoggingExcludeFactory.maybeLog(new NormalizingExcludeFactory(// performs algebra
                new CachingExcludeFactory(// caches the result of optimization operations
                    new DefaultExcludeFactory(), // the end of the chain, mandatory

        @Nullable
        public static PrimitiveType maybeOfValue(@Nullable Object value) {
            return value != null ? maybeOf(value.getClass()) : null;
        }

        @Nullable
        private static PrimitiveType maybeOf(Class<?> arrayType) {
            for (PrimitiveType primitiveType : values()) {
                if (primitiveType.arrayType == arrayType) {
                    return primitiveType;
                }