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32 package net.sf.retrotranslator.transformer;
33
34 import net.sf.retrotranslator.runtime.asm.*;
35 import net.sf.retrotranslator.runtime.impl.BytecodeTransformer;
36
37
40 class ClassTransformer implements BytecodeTransformer {
41
42 private boolean lazy;
43 private boolean stripsign;
44 private boolean retainflags;
45 private EmbeddingConverter converter;
46 private SystemLogger logger;
47 private ReplacementLocatorFactory factory;
48
49 public ClassTransformer(boolean lazy, boolean stripsign, boolean retainflags, SystemLogger logger,
50 EmbeddingConverter converter, ReplacementLocatorFactory factory) {
51 this.lazy = lazy;
52 this.stripsign = stripsign;
53 this.retainflags = retainflags;
54 this.converter = converter;
55 this.logger = logger;
56 this.factory = factory;
57 }
58
59 public byte[] transform(byte[] bytes, int offset, int length) {
60 if (lazy && !factory.getTarget().isBefore(TransformerTools.getClassVersion(bytes, offset))) {
61 if (offset == 0 && length == bytes.length) return bytes;
62 byte[] result = new byte[length];
63 System.arraycopy(bytes, offset, result, 0, length);
64 return result;
65 }
66 ClassWriter classWriter = new ClassWriter(true);
67 MethodCounter counter = new MethodCounter();
68 ClassVisitor visitor = new DuplicateInterfacesVisitor(
69 new VersionVisitor(classWriter, factory.getTarget()), logger, counter);
70 boolean isTarget14 = factory.getTarget() == ClassVersion.VERSION_14;
71 if (isTarget14) {
72 visitor = new ArrayCloningVisitor(new ClassLiteralVisitor(visitor));
73 }
74 if (converter != null) {
75 visitor = new PrefixingVisitor(visitor, converter);
76 }
77 if (isTarget14 && !factory.isRetainapi()) {
78 visitor = new SpecificReplacementVisitor(visitor, factory.isAdvanced());
79 }
80 if (!factory.isEmpty()) {
81 visitor = new GeneralReplacementVisitor(new EnumVisitor(visitor), factory.getLocator());
82 }
83 if (stripsign) {
84 visitor = new SignatureStrippingVisitor(visitor);
85 }
86 new ClassReader(bytes, offset, length).accept(visitor, false);
87 if (counter.containsDuplicates()) {
88 byte[] bytecode = classWriter.toByteArray();
89 classWriter = new ClassWriter(true);
90 new ClassReader(bytecode).accept(new DuplicateMethodsVisitor(classWriter, logger, counter), false);
91 }
92 return classWriter.toByteArray(isTarget14 && !retainflags);
93 }
94
95 }
96 |
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