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 import net.brabenetz.lib.securedproperties.utils.SecuredPropertiesUtils;
23 import org.apache.commons.lang3.Validate;
24
25 import java.io.File;
26 import java.util.Properties;
27
28 /**
29 * {@link ConfigInitializer} implementation to read from {@link Properties} Files.
30 * <p>
31 * The property-Prefix is "secured-properties".<br>
32 * The Keys must be kebab-case like 'secured-properties.secret-file'.
33 */
34 public class ConfigByPropertyFile extends AbstractConfigInitializer {
35
36 private final Properties properties;
37
38 public ConfigByPropertyFile(final File propertyFile) {
39 this(ConfigKey.DEFAULT_PREFIX_KEBAB_CASE, propertyFile);
40 }
41
42 /**
43 * @param configKeyPrefix an optional key prefix (default is 'secured-properties').
44 * @param propertyFile required, but the {@link Properties} File itself is the optional.<br>
45 * If the File doesn't exist an empty Properties Object will be used to prevent errors.
46 */
47 public ConfigByPropertyFile(final String configKeyPrefix, final File propertyFile) {
48 super(configKeyPrefix, ConfigKey::getKebabCase, (final ConfigKey key) -> configKeyPrefix + "." + key.getKebabCase());
49 Validate.notNull(propertyFile, "The Propety-File is required");
50 if (propertyFile.exists()) {
51 properties = SecuredPropertiesUtils.readProperties(propertyFile);
52 } else {
53 properties = new Properties();
54 }
55 }
56
57 @Override
58 protected String getValue(final ConfigKey key) {
59 return properties.getProperty(getKeyFactory().apply(key));
60 }
61
62 }