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/*============LICENSE_START=======================================================
* oom-truststore-merger
* ================================================================================
* Copyright (C) 2020 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.oom.truststoremerger.configuration.path;
import java.util.Arrays;
import java.util.List;
import java.util.function.Predicate;
import org.onap.oom.truststoremerger.configuration.exception.TruststoresPathsProviderException;
import org.onap.oom.truststoremerger.configuration.path.env.EnvProvider;
public class DelimitedPathsReader {
private static final String DELIMITER = ":";
private static final int NEGATIVE_SPLIT_LIMIT = -1;
private final EnvProvider envProvider;
private final Predicate<List<String>> pathsValidator;
DelimitedPathsReader(EnvProvider envProvider, Predicate<List<String>> pathsValidator) {
this.envProvider = envProvider;
this.pathsValidator = pathsValidator;
}
public List<String> get(String envName) throws TruststoresPathsProviderException {
return envProvider.getEnv(envName)
.filter(this::hasValue)
.map(this::splitToList)
.filter(pathsValidator)
.orElseThrow(() -> new TruststoresPathsProviderException(
envName + " environment variable does not contain valid paths"));
}
private boolean hasValue(String envValue) {
return !envValue.isEmpty();
}
private List<String> splitToList(String stringToSplit) {
return Arrays.asList(stringToSplit.split(DELIMITER, NEGATIVE_SPLIT_LIMIT));
}
}
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