| 1 | /******************************************************************************* |
| 2 | * Copyright (c) 2007, 2008 IBM Corporation and others. |
| 3 | * All rights reserved. This program and the accompanying materials |
| 4 | * are made available under the terms of the Eclipse Public License v1.0 |
| 5 | * which accompanies this distribution, and is available at |
| 6 | * http://www.eclipse.org/legal/epl-v10.html |
| 7 | * |
| 8 | * Contributors: |
| 9 | * IBM Corporation - initial API and implementation |
| 10 | *******************************************************************************/ |
| 11 | package org.eclipse.pde.api.tools.internal.comparator; |
| 12 | |
| 13 | import org.objectweb.asm.signature.SignatureVisitor; |
| 14 | |
| 15 | /** |
| 16 | * This class is used to decode a generic signature for class or method |
| 17 | */ |
| 18 | final class SignatureDecoder implements SignatureVisitor { |
| 19 | static final int CLASS_BOUND = 1; |
| 20 | static final int DEFAULT = 0; |
| 21 | static final int INTERFACE_BOUND = 2; |
| 22 | static final int SUPER_CLASS = 3; |
| 23 | static final int NORMAL_TYPE_ARGUMENT = 4; |
| 24 | static final int EXTENDS_TYPE_ARGUMENT = 5; |
| 25 | static final int SUPER_TYPE_ARGUMENT = 6; |
| 26 | |
| 27 | int mode = DEFAULT; |
| 28 | SignatureDescriptor signatureDescriptor; |
| 29 | |
| 30 | public SignatureDecoder(SignatureDescriptor signatureDescriptor) { |
| 31 | this.signatureDescriptor = signatureDescriptor; |
| 32 | } |
| 33 | public SignatureVisitor visitArrayType() { |
| 34 | return this; |
| 35 | } |
| 36 | |
| 37 | public void visitBaseType(char descriptor) { |
| 38 | // nothing to do |
| 39 | } |
| 40 | |
| 41 | public SignatureVisitor visitClassBound() { |
| 42 | this.mode = CLASS_BOUND; |
| 43 | return this; |
| 44 | } |
| 45 | |
| 46 | public void visitClassType(String name) { |
| 47 | String classTypeName = name.replace('/', '.'); |
| 48 | switch(this.mode) { |
| 49 | case CLASS_BOUND : |
| 50 | this.signatureDescriptor.setClassBound(classTypeName); |
| 51 | break; |
| 52 | case INTERFACE_BOUND : |
| 53 | this.signatureDescriptor.addInterfaceBound(classTypeName); |
| 54 | break; |
| 55 | case SUPER_CLASS : |
| 56 | this.signatureDescriptor.setSuperclass(classTypeName); |
| 57 | break; |
| 58 | case EXTENDS_TYPE_ARGUMENT : |
| 59 | case SUPER_TYPE_ARGUMENT : |
| 60 | case NORMAL_TYPE_ARGUMENT : |
| 61 | this.signatureDescriptor.addTypeArgument(classTypeName); |
| 62 | break; |
| 63 | } |
| 64 | this.mode = DEFAULT; |
| 65 | } |
| 66 | |
| 67 | public void visitEnd() { |
| 68 | // nothing to do |
| 69 | } |
| 70 | |
| 71 | public SignatureVisitor visitExceptionType() { |
| 72 | // nothing to do |
| 73 | return this; |
| 74 | } |
| 75 | |
| 76 | public void visitFormalTypeParameter(String name) { |
| 77 | this.signatureDescriptor.addTypeParameterDescriptor(name); |
| 78 | } |
| 79 | |
| 80 | public void visitInnerClassType(String name) { |
| 81 | } |
| 82 | |
| 83 | public SignatureVisitor visitInterface() { |
| 84 | return this; |
| 85 | } |
| 86 | |
| 87 | public SignatureVisitor visitInterfaceBound() { |
| 88 | this.mode = INTERFACE_BOUND; |
| 89 | return this; |
| 90 | } |
| 91 | |
| 92 | public SignatureVisitor visitParameterType() { |
| 93 | return this; |
| 94 | } |
| 95 | |
| 96 | public SignatureVisitor visitReturnType() { |
| 97 | return this; |
| 98 | } |
| 99 | |
| 100 | public SignatureVisitor visitSuperclass() { |
| 101 | this.mode = SUPER_CLASS; |
| 102 | return this; |
| 103 | } |
| 104 | |
| 105 | public void visitTypeArgument() { |
| 106 | } |
| 107 | |
| 108 | public SignatureVisitor visitTypeArgument(char wildcard) { |
| 109 | switch(wildcard) { |
| 110 | case SignatureVisitor.EXTENDS : |
| 111 | this.mode= EXTENDS_TYPE_ARGUMENT; |
| 112 | break; |
| 113 | case SignatureVisitor.SUPER : |
| 114 | this.mode= SUPER_TYPE_ARGUMENT; |
| 115 | break; |
| 116 | case SignatureVisitor.INSTANCEOF : |
| 117 | this.mode= NORMAL_TYPE_ARGUMENT; |
| 118 | } |
| 119 | return this; |
| 120 | } |
| 121 | |
| 122 | public void visitTypeVariable(String name) { |
| 123 | } |
| 124 | } |