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Java > Open Source Codes > org > objectstyle > cayenne > gen > AbsFileResourceLoader


1 /* ====================================================================
2  *
3  * The ObjectStyle Group Software License, version 1.1
4  * ObjectStyle Group - http://objectstyle.org/
5  *
6  * Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
7  * of the software. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
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13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
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22  * must include the following acknowlegement:
23  * "This product includes software developed by independent contributors
24  * and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
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28  * 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
29  * or promote products derived from this software without prior written
30  * permission. For written permission, email
31  * "andrus at objectstyle dot org".
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33  * 5. Products derived from this software may not be called "ObjectStyle"
34  * or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
35  * names without prior written permission.
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37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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39  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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51  * This software consists of voluntary contributions made by many
52  * individuals and hosted on ObjectStyle Group web site. For more
53  * information on the ObjectStyle Group, please see
54  * <http://objectstyle.org/>.
55  */
56 package org.objectstyle.cayenne.gen;
57
58 import java.io.BufferedInputStream JavaDoc;
59 import java.io.File JavaDoc;
60 import java.io.FileInputStream JavaDoc;
61 import java.io.FileNotFoundException JavaDoc;
62 import java.io.InputStream JavaDoc;
63
64 import org.apache.commons.collections.ExtendedProperties;
65 import org.apache.velocity.exception.ResourceNotFoundException;
66 import org.apache.velocity.runtime.resource.loader.FileResourceLoader;
67
68 /**
69  * Special resource loader that allows loading files
70  * using absolute path and current directory.
71  *
72  * @author Andrei Adamchik
73  */
74 public class AbsFileResourceLoader extends FileResourceLoader {
75
76     /**
77      * Constructor for AbsFileResourceLoader.
78      */
79     public AbsFileResourceLoader() {
80         super();
81     }
82
83     /**
84      * Returns resource as InputStream.
85      * First calls super implementation. If resource wasn't found,
86      * it attempts to load it from current directory or as an absolute path.
87      *
88      * @see org.apache.velocity.runtime.resource.loader.ResourceLoader#getResourceStream(String)
89      */
90     public synchronized InputStream JavaDoc getResourceStream(String JavaDoc name)
91         throws ResourceNotFoundException {
92
93         // attempt to load using default configuration
94 try {
95             return super.getResourceStream(name);
96         } catch (ResourceNotFoundException rnfex) {
97             // attempt to load from current directory or as an absolute path
98 try {
99                 File JavaDoc file = new File JavaDoc(name);
100                 return (file.canRead())
101                     ? new BufferedInputStream JavaDoc(
102                         new FileInputStream JavaDoc(file.getAbsolutePath()))
103                     : null;
104
105             } catch (FileNotFoundException JavaDoc fnfe) {
106                 throw new ResourceNotFoundException(
107                     "AbsFileResourceLoader Error: cannot find resource " + name);
108             }
109         }
110     }
111
112     /**
113      * @see org.apache.velocity.runtime.resource.loader.ResourceLoader#init(ExtendedProperties)
114      */
115     public void init(ExtendedProperties arg0) {
116         rsvc.info("AbsFileResourceLoader : initialization starting.");
117         super.init(arg0);
118     }
119
120 }
121
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