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/*
* ============LICENSE_START====================================
* DCAEGEN2-SERVICES-SDK
* =========================================================
* Copyright (C) 2019 Nokia. All rights reserved.
* =========================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=====================================
*/
package org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.streams;
import io.vavr.control.Either;
import io.vavr.control.Try;
import org.onap.dcaegen2.services.sdk.rest.services.annotations.ExperimentalApi;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.exceptions.StreamParserError;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.exceptions.StreamParsingException;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.streams.DataStream;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.streams.RawDataStream;
/**
* A generic data stream parser which parses {@code T} to data stream {@code S}.
*
* @author <a href="mailto:piotr.jaszczyk@nokia.com">Piotr Jaszczyk</a>
* @param <T> input data type, eg. Gson Object
* @param <S> output data type
* @since 1.1.4
*/
@ExperimentalApi
public interface StreamParser<T, S extends DataStream> {
/**
* Parse the input data {@code T} producing the {@link DataStream}.
*
* @param input - the input data
* @return Right(parsing result) or Left(parsing error)
*/
default Either<StreamParserError, S> parse(RawDataStream<T> input) {
return Try.of(() -> unsafeParse(input))
.toEither()
.mapLeft(StreamParserError::fromThrowable);
}
/**
* Parse the input data {@code T} producing the {@link DataStream}. Will throw StreamParsingException when input
* was invalid.
*
* @param input - the input data
* @return parsing result
* @throws StreamParsingException when parsing was unsuccessful
*/
default S unsafeParse(RawDataStream<T> input) {
return parse(input).getOrElseThrow(StreamParsingException::new);
}
}
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