1 /*-
2 * #%L
3 * Secured Properties
4 * ===============================================================
5 * Copyright (C) 2016 - 2019 Brabenetz Harald, Austria
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
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
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 * #L%
19 */
20 package net.brabenetz.lib.securedproperties.config;
21
22 /**
23 * {@link ConfigInitializer} implementation to read from System Properties ({@link System#getProperty(String)}).
24 * <p>
25 * The property-Prefix is "secured-properties".<br>
26 * The Keys must be kebab-case like 'secured-properties.secret-file'.
27 */
28 public class ConfigBySystemProperties extends AbstractConfigInitializer {
29
30 public ConfigBySystemProperties() {
31 this(ConfigKey.DEFAULT_PREFIX_KEBAB_CASE);
32 }
33
34 public ConfigBySystemProperties(final String configKeyPrefix) {
35 super(configKeyPrefix, ConfigKey::getKebabCase, (final ConfigKey key) -> configKeyPrefix + "." + key.getKebabCase());
36 }
37
38 @Override
39 protected String getValue(final ConfigKey key) {
40 return System.getProperty(getKeyFactory().apply(key));
41 }
42
43 }