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.api.streams;
23 import io.vavr.control.Either;
24 import io.vavr.control.Try;
25 import org.onap.dcaegen2.services.sdk.rest.services.annotations.ExperimentalApi;
26 import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.exceptions.StreamParserError;
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.DataStream;
31 * A generic data stream parser which parses {@code T} to data stream {@code S}.
33 * @author <a href="mailto:piotr.jaszczyk@nokia.com">Piotr Jaszczyk</a>
34 * @param <T> input data type, eg. Gson Object
35 * @param <S> output data type
39 public interface StreamParser<T, S extends DataStream> {
42 * Parse the input data {@code T} producing the {@link DataStream}.
44 * @param input - the input data
45 * @return Right(parsing result) or Left(parsing error)
47 default Either<StreamParserError, S> parse(T input) {
48 return Try.of(() -> unsafeParse(input))
50 .mapLeft(StreamParserError::fromThrowable);
54 * Parse the input data {@code T} producing the {@link DataStream}. Will throw StreamParsingException when input
57 * @param input - the input data
58 * @return parsing result
59 * @throws StreamParsingException when parsing was unsuccessful
61 default S unsafeParse(T input) {
62 return parse(input).getOrElseThrow(StreamParsingException::new);