1 /*============LICENSE_START=======================================================
2 * oom-truststore-merger
3 * ================================================================================
4 * Copyright (C) 2020 Nokia. All rights reserved.
5 * ================================================================================
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 * ============LICENSE_END=========================================================
20 package org.onap.oom.truststoremerger.configuration.path;
22 import java.util.Arrays;
23 import java.util.List;
24 import java.util.function.Predicate;
25 import org.onap.oom.truststoremerger.configuration.exception.TruststoresPathsProviderException;
26 import org.onap.oom.truststoremerger.configuration.path.env.EnvProvider;
28 public class DelimitedPathsReader {
30 private static final String DELIMITER = ":";
31 private static final int NEGATIVE_SPLIT_LIMIT = -1;
33 private final EnvProvider envProvider;
34 private final Predicate<List<String>> pathsValidator;
36 DelimitedPathsReader(EnvProvider envProvider, Predicate<List<String>> pathsValidator) {
37 this.envProvider = envProvider;
38 this.pathsValidator = pathsValidator;
41 public List<String> get(String envName) throws TruststoresPathsProviderException {
42 return envProvider.getEnv(envName)
43 .filter(this::hasValue)
44 .map(this::splitToList)
45 .filter(pathsValidator)
46 .orElseThrow(() -> new TruststoresPathsProviderException(
47 envName + " environment variable does not contain valid paths"));
50 private boolean hasValue(String envValue) {
51 return !envValue.isEmpty();
54 private List<String> splitToList(String stringToSplit) {
55 return Arrays.asList(stringToSplit.split(DELIMITER, NEGATIVE_SPLIT_LIMIT));