2 * ============LICENSE_START====================================
3 * DCAEGEN2-SERVICES-SDK
4 * =========================================================
5 * Copyright (C) 2019 Nokia. All rights reserved.
6 * =========================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=====================================
21 package org.onap.dcaegen2.services.sdk.rest.services.cbs.client.impl.streams.gson;
23 import com.google.gson.JsonElement;
24 import com.google.gson.JsonObject;
25 import io.vavr.collection.Stream;
26 import java.io.IOException;
27 import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.exceptions.StreamParsingException;
28 import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.streams.DataStreamDirection;
29 import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.streams.ImmutableRawDataStream;
30 import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.streams.RawDataStream;
33 * @author <a href="mailto:piotr.jaszczyk@nokia.com">Piotr Jaszczyk</a>
36 public final class DataStreamUtils {
38 public static Stream<RawDataStream<JsonObject>> mapJsonToStreams(JsonElement streamsJson,
39 DataStreamDirection direction) {
40 return Stream.ofAll(streamsJson.getAsJsonObject().entrySet())
41 .map(namedSinkJson -> {
42 final JsonObject jsonObject = namedSinkJson.getValue().getAsJsonObject();
43 return rawDataStream(namedSinkJson.getKey(), direction, jsonObject);
47 public static void assertStreamType(
48 RawDataStream<JsonObject> json,
50 DataStreamDirection expectedDirection) {
51 if (!json.type().equals(expectedType)) {
52 throw new StreamParsingException(
53 "Invalid stream type. Expected '" + expectedType + "', but was '" + json.type() + "'");
55 if (json.direction() != expectedDirection) {
56 throw new StreamParsingException(
57 "Invalid stream direction. Expected '" + expectedDirection + "', but was '" + json.direction()
62 public static RawDataStream<JsonObject> readSourceFromResource(String resource) throws IOException {
63 return rawDataStream(resource, DataStreamDirection.SOURCE, GsonUtils.readObjectFromResource(resource));
66 public static RawDataStream<JsonObject> readSinkFromResource(String resource) throws IOException {
67 return rawDataStream(resource, DataStreamDirection.SINK, GsonUtils.readObjectFromResource(resource));
70 private static RawDataStream<JsonObject> rawDataStream(String name, DataStreamDirection direction, JsonObject json) {
71 return ImmutableRawDataStream.<JsonObject>builder()
74 .type(GsonUtils.requiredString(json, "type"))