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Java > Open Source Codes > com > jeantessier > classreader > ClassfileLoader


1 /*
2  * Copyright (c) 2001-2005, Jean Tessier
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * * Redistributions of source code must retain the above copyright
10  * notice, this list of conditions and the following disclaimer.
11  *
12  * * Redistributions in binary form must reproduce the above copyright
13  * notice, this list of conditions and the following disclaimer in the
14  * documentation and/or other materials provided with the distribution.
15  *
16  * * Neither the name of Jean Tessier nor the names of his contributors
17  * may be used to endorse or promote products derived from this software
18  * without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32
33 package com.jeantessier.classreader;
34
35 import java.io.*;
36 import java.util.*;
37
38 /**
39  * Base interface for parsing <code>.class</code> files.
40  * This should have been a Java interface, but I needed
41  * the protected contract for the Decorator Pattern.
42  *
43  * @see ClassfileLoaderDecorator
44  */
45 public abstract class ClassfileLoader {
46     // Main methods
47 public abstract Classfile getClassfile(String JavaDoc name);
48     public abstract Collection getAllClassfiles();
49     public abstract Collection getAllClassNames();
50
51     public void load(Collection filenames) {
52         fireBeginSession();
53         
54         Iterator i = filenames.iterator();
55         while (i.hasNext()) {
56             load(i.next().toString());
57         }
58
59         fireEndSession();
60     }
61
62     // Protected contract for Decorator Pattern
63 protected abstract void load(String JavaDoc filename);
64     protected abstract void load(String JavaDoc filename, InputStream in);
65     protected abstract Classfile load(DataInputStream in) throws IOException;
66
67     // Event stuff
68 public abstract void addLoadListener(LoadListener listener);
69     public abstract void removeLoadListener(LoadListener listener);
70     protected abstract void fireBeginSession();
71     protected abstract void fireBeginGroup(String JavaDoc group_name, int size);
72     protected abstract void fireBeginClassfile(String JavaDoc filename);
73     protected abstract void fireBeginFile(String JavaDoc filename);
74     protected abstract void fireEndClassfile(String JavaDoc filename, Classfile classfile);
75     protected abstract void fireEndFile(String JavaDoc filename);
76     protected abstract void fireEndGroup(String JavaDoc group_name);
77     protected abstract void fireEndSession();
78 }
79
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