001/*
002 * SPDX-License-Identifier: Apache-2.0
003 *
004 * Copyright 2024-2026 The Enola <https://enola.dev> Authors
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 *     https://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package dev.enola.web;
019
020import com.google.protobuf.InvalidProtocolBufferException;
021
022import dev.enola.core.proto.EnolaServiceGrpc;
023import dev.enola.core.proto.GetThingRequest;
024import dev.enola.thing.message.MoreThings;
025import dev.enola.thing.message.ProtoThingsProvider;
026import dev.enola.thing.proto.Thing;
027
028import java.util.Collections;
029
030public class EnolaServiceProtoThingsProvider implements ProtoThingsProvider {
031
032    // TODO With the (new) GetThingsResponse, this shouldn't even be required anymore...
033
034    private final EnolaServiceGrpc.EnolaServiceBlockingStub service;
035
036    public EnolaServiceProtoThingsProvider(EnolaServiceGrpc.EnolaServiceBlockingStub service) {
037        this.service = service;
038    }
039
040    @Override
041    public Iterable<Thing> get(String iri) {
042        var request = GetThingRequest.newBuilder().setIri(iri).build();
043        var response = service.getThing(request);
044        try {
045            if (!response.hasThing()) return Collections.emptySet();
046            var any = response.getThing();
047            return MoreThings.fromAny(any);
048
049        } catch (InvalidProtocolBufferException e) {
050            throw new IllegalArgumentException(e);
051        }
052    }
053}