private static V validPropertyValue()

in hugegraph-core/src/main/java/org/apache/hugegraph/traversal/optimize/TraversalUtil.java [732:780]
44 lines of code
14 McCabe index (conditional complexity)

    private static <V> V validPropertyValue(V value, PropertyKey pkey) {
        if (pkey.cardinality().single() && value instanceof Collection &&
            !pkey.dataType().isBlob()) {
            // Expect single but got collection, like P.within([])
            Collection<?> collection = (Collection<?>) value;
            Collection<Object> validValues = new ArrayList<>();
            for (Object element : collection) {
                Object validValue = pkey.validValue(element);
                if (validValue == null) {
                    validValues = null;
                    break;
                }
                validValues.add(validValue);
            }
            if (validValues == null) {
                List<Class<?>> classes = new ArrayList<>();
                for (Object v : (Collection<?>) value) {
                    classes.add(v == null ? null : v.getClass());
                }
                E.checkArgument(false,
                                "Invalid data type of query value in %s, " +
                                "expect %s for '%s', actual got %s",
                                value, pkey.dataType(), pkey.name(), classes);
            }

            @SuppressWarnings("unchecked")
            V validValue = (V) validValues;
            return validValue;
        }

        V validValue;
        if (pkey.cardinality().multiple() && !(value instanceof Collection)) {
            // Expect non-single but got single, like P.contains(value)
            List<V> values = CollectionUtil.toList(value);
            values = pkey.validValue(values);
            validValue = values != null ? values.get(0) : null;
        } else {
            validValue = pkey.validValue(value);
        }

        if (validValue == null) {
            E.checkArgument(false,
                            "Invalid data type of query value '%s', " +
                            "expect %s for '%s', actual got %s",
                            value, pkey.dataType(), pkey.name(),
                            value == null ? null : value.getClass());
        }
        return validValue;
    }