01: /*
02: * Janino - An embedded Java[TM] compiler
03: *
04: * Copyright (c) 2006, Arno Unkrig
05: * All rights reserved.
06: *
07: * Redistribution and use in source and binary forms, with or without
08: * modification, are permitted provided that the following conditions
09: * are met:
10: *
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above
14: * copyright notice, this list of conditions and the following
15: * disclaimer in the documentation and/or other materials
16: * provided with the distribution.
17: * 3. The name of the author may not be used to endorse or promote
18: * products derived from this software without specific prior
19: * written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
25: * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27: * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
29: * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
31: * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32: */
33:
34: package org.codehaus.janino;
35:
36: import java.io.*;
37:
38: import org.codehaus.janino.util.ClassFile;
39: import org.codehaus.janino.util.resource.*;
40:
41: /**
42: * This {@link org.codehaus.janino.IClassLoader} loads IClasses through a
43: * a {@link org.codehaus.janino.util.resource.ResourceFinder} that designates
44: * {@link org.codehaus.janino.util.ClassFile}s.
45: */
46: public class ResourceFinderIClassLoader extends IClassLoader {
47: private final ResourceFinder resourceFinder;
48:
49: public ResourceFinderIClassLoader(ResourceFinder resourceFinder,
50: IClassLoader optionalParentIClassLoader) {
51: super (optionalParentIClassLoader);
52: this .resourceFinder = resourceFinder;
53: this .postConstruct();
54: }
55:
56: protected IClass findIClass(String descriptor)
57: throws ClassNotFoundException {
58: String className = Descriptor.toClassName(descriptor);
59:
60: // Find the class file resource.
61: Resource classFileResource = this .resourceFinder
62: .findResource(ClassFile
63: .getClassFileResourceName(className));
64: if (classFileResource == null)
65: return null;
66:
67: // Open the class file resource.
68: InputStream is;
69: try {
70: is = classFileResource.open();
71: } catch (IOException ex) {
72: throw new ClassNotFoundException("Opening resource \""
73: + classFileResource.getFileName() + "\"", ex);
74: }
75:
76: // Load the IClass from the class file.
77: ClassFile cf;
78: try {
79: cf = new ClassFile(is);
80: } catch (IOException e) {
81: throw new ClassNotFoundException("Reading resource \""
82: + classFileResource.getFileName() + "\"", e);
83: } finally {
84: try {
85: is.close();
86: } catch (IOException e) {
87: }
88: }
89: IClass iClass = new ClassFileIClass(cf, this);
90: this.defineIClass(iClass);
91: return iClass;
92: }
93:
94: }
|