return DEFAULT.newHasher();
    }

    /**
     * Returns a new {@link PrimitiveHasher} based on the default hashing implementation.
     */
    public static PrimitiveHasher newPrimitiveHasher() {
        return DEFAULT.newPrimitiveHasher();
    }

    /**
     * Returns a hash code to use as a signature for a given type.
     */
    public static HashCode signature(Class<?> type) {

        }
    }

    @Override
    public HashCode getContentHash() throws ResourceException {
        PrimitiveHasher hasher = Hashing.newPrimitiveHasher();
        hasher.putHash(SIGNATURE);
        hasher.putString(getText());
        return hasher.hash();
    }

    @Override
    public Reader getAsReader() {
        assertNoDirectory();