Examples with PlaceholderResolver org.eclipse.ditto.placeholders.PlaceholderResolver used on opensource projects

Example 1 with PlaceholderResolver

use of org.eclipse.ditto.placeholders.PlaceholderResolver in project ditto by eclipse.

the class SignalFilter method matchesFilterBeforeEnrichment.

private static boolean matchesFilterBeforeEnrichment(final FilteredTopic filteredTopic, final Signal<?> signal) {
    final Optional<String> filterOptional = filteredTopic.getFilter();
    if (filterOptional.isPresent()) {
        // match filter ignoring "extraFields"
        final TopicPath topicPath = DITTO_PROTOCOL_ADAPTER.toTopicPath(signal);
        final PlaceholderResolver<TopicPath> topicPathPlaceholderResolver = PlaceholderFactory.newPlaceholderResolver(TOPIC_PATH_PLACEHOLDER, topicPath);
        final PlaceholderResolver<WithResource> resourcePlaceholderResolver = PlaceholderFactory.newPlaceholderResolver(RESOURCE_PLACEHOLDER, signal);
        final PlaceholderResolver<Object> timePlaceholderResolver = PlaceholderFactory.newPlaceholderResolver(TIME_PLACEHOLDER, new Object());
        final Criteria criteria = parseCriteria(filterOptional.get(), signal.getDittoHeaders(), topicPathPlaceholderResolver, resourcePlaceholderResolver, timePlaceholderResolver);
        final Set<JsonPointer> extraFields = filteredTopic.getExtraFields().map(JsonFieldSelector::getPointers).orElse(Collections.emptySet());
        if (signal instanceof ThingEvent) {
            return ThingEventToThingConverter.thingEventToThing((ThingEvent<?>) signal).filter(thing -> Thing3ValuePredicateVisitor.couldBeTrue(criteria, extraFields, thing, topicPathPlaceholderResolver, resourcePlaceholderResolver, timePlaceholderResolver)).isPresent();
        } else {
            final Thing emptyThing = Thing.newBuilder().build();
            return Thing3ValuePredicateVisitor.couldBeTrue(criteria, extraFields, emptyThing, topicPathPlaceholderResolver, resourcePlaceholderResolver, timePlaceholderResolver);
        }
    } else {
        return true;
    }
}

Example 2 with PlaceholderResolver

use of org.eclipse.ditto.placeholders.PlaceholderResolver in project ditto by eclipse.

the class OutboundMappingProcessorActor method applyFilter.

private Collection<OutboundSignalWithSender> applyFilter(final OutboundSignalWithSender outboundSignalWithExtra, final FilteredTopic filteredTopic) {
    final Optional<String> filter = filteredTopic.getFilter();
    final Optional<JsonFieldSelector> extraFields = filteredTopic.getExtraFields();
    if (filter.isPresent() && extraFields.isPresent()) {
        // evaluate filter criteria again if signal enrichment is involved.
        final Signal<?> signal = outboundSignalWithExtra.getSource();
        final TopicPath topicPath = DITTO_PROTOCOL_ADAPTER.toTopicPath(signal);
        final PlaceholderResolver<TopicPath> topicPathPlaceholderResolver = PlaceholderFactory.newPlaceholderResolver(TOPIC_PATH_PLACEHOLDER, topicPath);
        final PlaceholderResolver<WithResource> resourcePlaceholderResolver = PlaceholderFactory.newPlaceholderResolver(RESOURCE_PLACEHOLDER, signal);
        final PlaceholderResolver<Object> timePlaceholderResolver = PlaceholderFactory.newPlaceholderResolver(TIME_PLACEHOLDER, new Object());
        final DittoHeaders dittoHeaders = signal.getDittoHeaders();
        final Criteria criteria = QueryFilterCriteriaFactory.modelBased(RqlPredicateParser.getInstance(), topicPathPlaceholderResolver, resourcePlaceholderResolver, timePlaceholderResolver).filterCriteria(filter.get(), dittoHeaders);
        return outboundSignalWithExtra.getExtra().flatMap(extra -> ThingEventToThingConverter.mergeThingWithExtraFields(signal, extraFields.get(), extra).filter(ThingPredicateVisitor.apply(criteria, topicPathPlaceholderResolver, resourcePlaceholderResolver, timePlaceholderResolver)).map(thing -> outboundSignalWithExtra)).map(Collections::singletonList).orElse(List.of());
    } else {
        // no signal enrichment: filtering is already done in SignalFilter since there is no ignored field
        return Collections.singletonList(outboundSignalWithExtra);
    }
}

Example 3 with PlaceholderResolver

use of org.eclipse.ditto.placeholders.PlaceholderResolver in project ditto by eclipse.

the class Resolvers method forOutbound.

/**
 * Create an expression resolver for an outbound message.
 *
 * @param mappedOutboundSignal the mapped external message.
 * @param sendingConnectionId the ID of the connection sending the message.
 * @return the expression resolver.
 */
public static ExpressionResolver forOutbound(final OutboundSignal.Mapped mappedOutboundSignal, final ConnectionId sendingConnectionId) {
    final Signal<?> signal = mappedOutboundSignal.getSource();
    final ExternalMessage externalMessage = mappedOutboundSignal.getExternalMessage();
    final Adaptable adaptable = mappedOutboundSignal.getAdaptable();
    return PlaceholderFactory.newExpressionResolver(RESOLVER_CREATORS.stream().map(creator -> creator.create(adaptable.getDittoHeaders(), signal, externalMessage.getTopicPath().orElse(null), signal.getDittoHeaders().getAuthorizationContext(), sendingConnectionId)).toArray(PlaceholderResolver[]::new));
}