1 /*
2 * Copyright 2012-2013 smartics, Kronseder & Reiner GmbH
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package de.smartics.properties.spi.config.support;
17
18 import java.net.URL;
19
20 import de.smartics.properties.api.config.domain.PropertyLocation;
21 import de.smartics.properties.api.config.domain.key.ApplicationId;
22 import de.smartics.properties.api.config.domain.key.ApplicationIdLoader;
23
24 /**
25 * Helper to create property location information from the manifest meta data.
26 */
27 class PropertyLocationHelper
28 {
29 // ********************************* Fields *********************************
30
31 // --- constants ------------------------------------------------------------
32
33 // --- members --------------------------------------------------------------
34
35 // ****************************** Initializer *******************************
36
37 // ****************************** Constructors ******************************
38
39 // ****************************** Inner Classes *****************************
40
41 // ********************************* Methods ********************************
42
43 // --- init -----------------------------------------------------------------
44
45 // --- get&set --------------------------------------------------------------
46
47 // --- business -------------------------------------------------------------
48
49 PropertyLocation createPropertyLocation(final ClassLoader classLoader,
50 final String propertiesFile)
51 {
52 final URL url = classLoader.getResource(propertiesFile);
53 final String fullUrl = url.toExternalForm();
54 final ApplicationId appId = determineAppId(propertiesFile, fullUrl);
55 final PropertyLocation location = new PropertyLocation(appId, fullUrl);
56 return location;
57 }
58
59 private ApplicationId determineAppId(final String propertiesFile,
60 final String fullUrl)
61 {
62 try
63 {
64 final ApplicationIdLoader appLoader = new ApplicationIdLoader(false);
65 final int endIndex = fullUrl.length() - propertiesFile.length();
66 final String rootUrlString = fullUrl.substring(0, endIndex);
67 final URL rootUrl = new URL(rootUrlString);
68 final ApplicationId appId = appLoader.load(rootUrl);
69 return appId;
70 }
71 catch (final Exception e)
72 {
73 return null;
74 }
75 }
76 // --- object basics --------------------------------------------------------
77
78 }