Examples with IdPrefixFilter io.syndesis.server.dao.manager.operators.IdPrefixFilter used on opensource projects

Example 1 with IdPrefixFilter

use of io.syndesis.server.dao.manager.operators.IdPrefixFilter in project syndesis by syndesisio.

the class JsonDbDao method fetchAll.

@Override
@SuppressWarnings({ "unchecked", "PMD.CyclomaticComplexity" })
public ListResult<T> fetchAll(Function<ListResult<T>, ListResult<T>>... operators) {
    try {
        GetOptions options = new GetOptions();
        // Try to convert operators to equivalent DB queries.
        if (operators != null) {
            for (int i = 0; i < operators.length; i++) {
                Function<ListResult<T>, ListResult<T>> operator = operators[i];
                if (operator.getClass() == IdPrefixFilter.class) {
                    IdPrefixFilter<T> filter = (IdPrefixFilter<T>) operator;
                    options.startAt(":" + filter.getPrefix());
                    options.endAt(":" + filter.getPrefix());
                    // Take it out of the list.
                    operators[i] = null;
                }
            }
        }
        // get the data out..
        byte[] json = jsondb.getAsByteArray(getCollectionPath(), options);
        ListResult<T> result;
        if (json != null && json.length > 0) {
            // Lets use jackson to parse the map of keys to our model instances
            ObjectReader reader = Json.reader();
            TypeFactory typeFactory = reader.getTypeFactory();
            MapType mapType = typeFactory.constructMapType(LinkedHashMap.class, String.class, getType());
            LinkedHashMap<String, T> map = reader.forType(mapType).readValue(json);
            result = ListResult.of(map.values());
        } else {
            result = ListResult.of(Collections.<T>emptyList());
        }
        if (operators == null) {
            return result;
        }
        for (Function<ListResult<T>, ListResult<T>> operator : operators) {
            if (operator != null) {
                result = operator.apply(result);
            }
        }
        return result;
    } catch (@SuppressWarnings("PMD.AvoidCatchingGenericException") RuntimeException | IOException e) {
        throw SyndesisServerException.launderThrowable(e);
    }
}