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/*
* ============LICENSE_START=======================================================
* PROJECT
* ================================================================================
* Copyright (C) 2021 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.dcae.multiplestreamreducer;
import io.vavr.Tuple2;
import io.vavr.collection.Map;
public class MultipleStreamReducer {
/**
* Converts configuration from: "one domain many streams"
* to: "one domain one stream"
*
* @param map domain to streams configuration
* @return configuration - one domain one stream
*/
public Map<String, String> reduce(Map<String, String[]> map) {
return map.toStream()
.toMap(Tuple2::_1, v -> v._2[0]);
}
/**
* Information about the current match: domain to stream
*
* @param domainToStreamConfig domain to stream configuration
* @return current domain to stream information
*/
public String getDomainToStreamsInfo(Map<String, String> domainToStreamConfig) {
return domainToStreamConfig.map(v -> "Domain: " +
v._1 + " has active stream: " + v._2 + System.lineSeparator())
.reduce((a, b) -> a + b);
}
}
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