private boolean includeField(String name) {
        if (name == null) {
            throw new NullPointerException("property name must not be null");
        }
        if (ALWAYS_SET_FIELDS.contains(name)) {
            return true;
        }
        if (excludeFields.contains(name)) {
            return false;
        }
        return includeFields.isEmpty() || includeFields.contains(name);
    }
Tests for null or empty. Does not check for length
@param value
@return
tika-core/src/main/java/org/apache/tika/metadata/writefilter/StandardWriteFilter.java