01: /***
02: * Retrotranslator: a Java bytecode transformer that translates Java classes
03: * compiled with JDK 5.0 into classes that can be run on JVM 1.4.
04: *
05: * Copyright (c) 2005 - 2008 Taras Puchko
06: * All rights reserved.
07: *
08: * Redistribution and use in source and binary forms, with or without
09: * modification, are permitted provided that the following conditions
10: * are met:
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 copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the copyright holders nor the names of its
17: * contributors may be used to endorse or promote products derived from
18: * this software without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30: * THE POSSIBILITY OF SUCH DAMAGE.
31: */package net.sf.retrotranslator.transformer;
32:
33: import java.io.UnsupportedEncodingException;
34: import java.util.regex.*;
35: import net.sf.retrotranslator.runtime.impl.RuntimeTools;
36:
37: /**
38: * @author Taras Puchko
39: */
40: class TextFileTransformer {
41:
42: private static Pattern pattern = Pattern
43: .compile("([A-Za-z_$][A-Za-z0-9_$]*\\.)+[A-Za-z_$][A-Za-z0-9_$]*");
44:
45: private final ReplacementLocatorFactory factory;
46: private final EmbeddingConverter converter;
47:
48: public TextFileTransformer(ReplacementLocatorFactory factory,
49: EmbeddingConverter converter) {
50: this .factory = factory;
51: this .converter = converter;
52: }
53:
54: public byte[] transform(byte[] bytes) {
55: boolean modified = false;
56: Matcher matcher = pattern.matcher(toString(bytes));
57: StringBuffer buffer = new StringBuffer();
58: while (matcher.find()) {
59: String originalName = matcher.group().replace('.', '/');
60: String backportName = factory.getLocator()
61: .getReferenceTypeName(originalName);
62: String name = converter == null ? backportName : converter
63: .convertClassName(backportName);
64: if (originalName.equals(name)) {
65: matcher.appendReplacement(buffer, "$0");
66: } else {
67: modified = true;
68: matcher.appendReplacement(buffer, Matcher
69: .quoteReplacement(RuntimeTools
70: .getDisplayClassName(name)));
71: }
72: }
73: return modified ? toBytes(matcher.appendTail(buffer).toString())
74: : bytes;
75: }
76:
77: private static String toString(byte[] bytes) {
78: try {
79: return new String(bytes, "UTF-8");
80: } catch (UnsupportedEncodingException e) {
81: throw new RuntimeException(e);
82: }
83: }
84:
85: private static byte[] toBytes(String s) {
86: try {
87: return s.getBytes("UTF-8");
88: } catch (UnsupportedEncodingException e) {
89: throw new RuntimeException(e);
90: }
91: }
92:
93: }
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