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Java > Open Source Codes > org > ofbiz > base > location > ComponentLocationResolver


1 /*
2  * $Id: ComponentLocationResolver.java 5462 2005-08-05 18:35:48Z jonesde $
3  *
4  * Copyright (c) 2004 The Open For Business Project - www.ofbiz.org
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included
14  * in all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
19  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
20  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
21  * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
22  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23  *
24  */
25 package org.ofbiz.base.location;
26
27 import java.net.MalformedURLException JavaDoc;
28 import java.net.URL JavaDoc;
29
30 import org.ofbiz.base.component.ComponentConfig;
31 import org.ofbiz.base.component.ComponentException;
32 import org.ofbiz.base.util.Debug;
33 import org.ofbiz.base.util.UtilURL;
34
35 /**
36  * A special location resolver that uses Strings like URLs, but with more options
37  *
38  *@author <a HREF="mailto:jonesde@ofbiz.org">David E. Jones</a>
39  *@version $Rev: 5462 $
40  *@since 3.1
41  */
42
43 public class ComponentLocationResolver implements LocationResolver {
44
45     public static final String JavaDoc module = ComponentLocationResolver.class.getName();
46
47     public URL JavaDoc resolveLocation(String JavaDoc location) throws MalformedURLException JavaDoc {
48         StringBuffer JavaDoc baseLocation = new StringBuffer JavaDoc(FlexibleLocation.stripLocationType(location));
49         
50         // componentName is between the first slash and the second
51 int firstSlash = baseLocation.indexOf("/");
52         int secondSlash = baseLocation.indexOf("/", firstSlash + 1);
53         if (firstSlash != 0 || secondSlash == -1) {
54             throw new MalformedURLException JavaDoc("Bad component location [" + location + "]: base location missing slashes [" + baseLocation + "], first=" + firstSlash + ", second=" + secondSlash + "; should be like: component://{component-name}/relative/path");
55         }
56         String JavaDoc componentName = baseLocation.substring(firstSlash + 1, secondSlash);
57         
58         // got the componentName, now remove it from the baseLocation, removing the second slash too (just in case the rootLocation has one)
59 baseLocation.delete(0, secondSlash + 1);
60
61         String JavaDoc rootLocation = null;
62         try {
63             rootLocation = ComponentConfig.getRootLocation(componentName);
64         } catch (ComponentException e) {
65             String JavaDoc errMsg = "Could not get root location for component with name [" + componentName + "], error was: " + e.toString();
66             Debug.logError(e, errMsg, module);
67             throw new MalformedURLException JavaDoc(errMsg);
68         }
69
70         // if there is not a forward slash between the two, add it
71 if (baseLocation.charAt(0) != '/' && rootLocation.charAt(rootLocation.length() - 1) != '/') {
72             baseLocation.insert(0, '/');
73         }
74
75         // insert the root location and we're done
76 baseLocation.insert(0, rootLocation);
77
78         URL JavaDoc fileUrl = UtilURL.fromFilename(baseLocation.toString());
79         
80         if (fileUrl == null) {
81             Debug.logWarning("Unable to get file URL for component location; expanded location was [" + baseLocation + "], original location was [" + location + "]", module);
82         }
83         
84         return fileUrl;
85     }
86 }
87
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