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#ifndef JDECOMPILER_CLASS_CPP
#define JDECOMPILER_CLASS_CPP
#include "class.h"
#include "field.cpp"
#include "method.cpp"
#include "version.cpp"
#include "enum-class.cpp"
namespace jdecompiler {
const vector<const Field*> Class::createFields(const vector<FieldDataHolder>& fieldsData, const ClassInfo& classinfo) const {
vector<const Field*> fields;
fields.reserve(fieldsData.size());
for(const FieldDataHolder& fieldData : fieldsData) {
try {
fields.push_back(fieldData.createField(classinfo));
} catch(DecompilationException& ex) {
cerr << "Exception while decompiling field " << fieldData.descriptor.toString() << ": " << ex.toString() << endl;
}
}
return fields;
}
const vector<const Method*> Class::createMethods(const vector<MethodDataHolder>& methodsData, const ClassInfo& classinfo) const {
vector<const Method*> methods;
methods.reserve(methodsData.size());
for(const MethodDataHolder& methodData : methodsData) {
methods.push_back(methodData.createMethod(classinfo));
}
return methods;
}
const StringifyContext& Class::getFieldStringifyContext() {
const MethodDescriptor& staticInitializerDescriptor = *new MethodDescriptor(thisType, "<clinit>", VOID);
const Method* staticInitializer = getMethod(staticInitializerDescriptor);
return staticInitializer != nullptr ? staticInitializer->context :
*new StringifyContext(classinfo.getEmptyDisassemblerContext(), classinfo,
new MethodScope(0, 0, 0), ACC_STATIC, staticInitializerDescriptor, Attributes::getEmptyInstance());
}
// Do not do it through constructor delegation, otherwise the fields are not initialized
Class::Class(const Version& version, const ClassType& thisType, const ClassType* superType, const ConstantPool& constPool,
uint16_t modifiers, const vector<const ClassType*>& interfaces, const Attributes& attributes,
const vector<FieldDataHolder>& fieldsData, const vector<MethodDataHolder>& methodsData,
const vector<const GenericParameter*>& genericParameters):
ClassElement(modifiers), version(version), thisType(thisType), superType(superType),
constPool(constPool), interfaces(interfaces), attributes(attributes),
classinfo(*new ClassInfo(*this, thisType, superType, interfaces, constPool, attributes, modifiers, version)),
fields(createFields(fieldsData, classinfo)), constants(filterConstants(fields)), methods(createMethods(methodsData, classinfo)),
genericParameters(genericParameters), fieldStringifyContext(getFieldStringifyContext()) {
if(thisType.isPackageInfo) {
if(modifiers != (ACC_INTERFACE | ACC_ABSTRACT | ACC_SYNTHETIC))
throw IllegalModifiersException("package-info must have only interface, abstract and synthetic modifiers");
if(!fields.empty() || !methods.empty() || attributes.has<InnerClassesAttribute>())
throw IllegalPackageInfoException("package-info must not have fields, methods or inner classes attribute");
}
}
const Class* Class::readClass(ClassInputStream& instream) {
if(instream.readUInt() != CLASS_SIGNATURE)
throw ClassFormatError("Wrong class signature");
const uint16_t
minorVersion = instream.readUShort(),
majorVersion = instream.readUShort();
const Version version(majorVersion, minorVersion);
const ConstantPool& constPool = *new ConstantPool(instream);
const uint16_t modifiers = instream.readUShort();
const ClassType& thisType = *new ClassType(constPool.get<ClassConstant>(instream.readUShort()));
const ClassConstant* superClassConstant = constPool.getNullable<ClassConstant>(instream.readUShort());
const ClassType* superType;
if(superClassConstant == nullptr) {
if(thisType != javaLang::Object)
throw DecompilationException("Class " + thisType.getName() + " has no super class");
superType = nullptr;
} else {
superType = new ClassType(superClassConstant);
}
const uint16_t interfacesCount = instream.readUShort();
vector<const ClassType*> interfaces;
interfaces.reserve(interfacesCount);
for(uint16_t i = 0; i < interfacesCount; ++i)
interfaces.push_back(new ClassType(constPool.get<ClassConstant>(instream.readUShort())->name));
const uint16_t fieldsCount = instream.readUShort();
vector<FieldDataHolder> fieldsData;
fieldsData.reserve(fieldsCount);
for(uint16_t i = 0; i < fieldsCount; ++i)
fieldsData.push_back(FieldDataHolder(constPool, instream));
const uint16_t methodsCount = instream.readUShort();
vector<MethodDataHolder> methodsData;
methodsData.reserve(methodsCount);
for(uint16_t i = 0; i < methodsCount; ++i)
methodsData.push_back(MethodDataHolder(constPool, instream, thisType));
const Attributes& attributes = *new Attributes(instream, constPool, instream.readUShort(), AttributesType::CLASS);
vector<const GenericParameter*> genericParameters;
const ClassSignatureAttribute* signatureAttribute = attributes.get<ClassSignatureAttribute>();
if(signatureAttribute != nullptr) {
const ClassSignature& signature = signatureAttribute->signature;
if(signature.superClass != *superType || !equal_values(interfaces, signature.interfaces))
throw IncopatibleSignatureTypesException("In class " + thisType.getName());
genericParameters = signature.genericParameters;
superType = &signature.superClass;
interfaces = signature.interfaces;
}
return modifiers & ACC_ENUM ?
createClass<EnumClass>(instream, version, thisType, superType, constPool, modifiers, interfaces,
attributes, fieldsData, methodsData, genericParameters) :
createClass<Class> (instream, version, thisType, superType, constPool, modifiers, interfaces,
attributes, fieldsData, methodsData, genericParameters);
}
/* Hacking function: it is necessary to add this Class* to the JDecompiler::decompilationClasses BEFORE initializing fields and methods */
template<class C>
inline const Class* Class::createClass(ClassInputStream& instream, const Version& version, const ClassType& thisType, const ClassType* superType,
const ConstantPool& constPool, uint16_t modifiers, const vector<const ClassType*>& interfaces,
const Attributes& attributes, const vector<FieldDataHolder>& fieldsData, const vector<MethodDataHolder>& methodsData,
const vector<const GenericParameter*>& genericParameters) {
static_assert(is_base_of<Class, C>(), "Type must be subtype of type Class");
C* clazz = static_cast<C*>(operator new(sizeof(C)));
static const regex classExtension("\\.class$");
static const JDecompiler& jdecompiler = JDecompiler::getInstance();
jdecompiler.classes.emplace(thisType.getEncodedName(), clazz);
jdecompiler.decompilationClasses.emplace(thisType.getEncodedName(),
ClassHolder(regex_replace(instream.fileName, classExtension, "") + ".java", clazz));
return new(clazz) C(version, thisType, superType, constPool, modifiers, interfaces, attributes, fieldsData, methodsData, genericParameters);
}
const Field* Class::getField(const string& name) const {
for(const Field* field : fields)
if(field->descriptor.name == name)
return field;
return nullptr;
}
const Field* Class::getField(const FieldDescriptor& descriptor) const {
for(const Field* field : fields)
if(field->descriptor == descriptor)
return field;
return nullptr;
}
const Method* Class::getMethod(const MethodDescriptor& descriptor) const {
const auto& result = find_if(methods.begin(), methods.end(),
[&descriptor] (const Method* method) { return method->descriptor.equalsIgnoreClass(descriptor); });
return result == methods.end() ? nullptr : *result;
}
string Class::anonymousToString(const ClassInfo& classinfo) const {
return thisType.isAnonymous ? toString0<true>(classinfo) : throw IllegalStateException("invokation of anonymousToString in a non-anonymous class");
}
template<bool isAnonymous>
string Class::toString0(const ClassInfo& classinfo) const {
string str;
str += annotationsToString(classinfo);
str += (isAnonymous ? anonymousDeclarationToString(classinfo) : declarationToString(classinfo)) + " {\n";
const size_t baseSize = str.size();
classinfo.increaseIndent();
str += bodyToString(classinfo);
classinfo.reduceIndent();
if(str.size() == baseSize)
str.back() = '}';
else
str += (str.back() == '\n' ? EMPTY_STRING : "\n") + classinfo.getIndent() + '}';
return headersToString(classinfo) + str;
}
inline string Class::annotationsToString(const ClassInfo& classinfo) const {
if(const AnnotationsAttribute* annotationsAttribute = attributes.get<AnnotationsAttribute>())
return annotationsAttribute->toString(classinfo) + '\n';
return EMPTY_STRING;
}
string Class::packageInfoToString(const ClassInfo& classinfo) const {
string str;
str += annotationsToString(classinfo);
str += packageToString(classinfo);
str += classinfo.importsToString();
if(str.back() == '\n')
str.pop_back();
return str;
}
string Class::headersToString(const ClassInfo& classinfo) const {
if(thisType.isNested)
return EMPTY_STRING;
string str;
str += versionCommentToString();
str += packageToString(classinfo);
str += classinfo.importsToString();
return str;
}
inline string Class::packageToString(const ClassInfo& classinfo) const {
return thisType.packageName.empty() ? EMPTY_STRING : (string)classinfo.getIndent() + "package " + thisType.packageName + ";\n\n";
}
inline string Class::versionCommentToString() const {
return JDecompiler::getInstance().printClassVersion() ? "/* Java version: " + to_string(version) + " */\n" : EMPTY_STRING;
}
string Class::anonymousDeclarationToString(const ClassInfo& classinfo) const {
if(interfaces.size() > 1)
throw DecompilationException("Anonymous class " + thisType.getName() + " cannot implement more than one interface");
if(interfaces.size() == 1) {
if(*superType != javaLang::Object)
throw DecompilationException("Anonymous class " + thisType.getName() +
" cannot implement an interface and simultaneously inherit from something other than java.lang.Object class");
return interfaces[0]->toString(classinfo) + "()";
}
return superType->toString(classinfo) + "()";
}
string Class::declarationToString(const ClassInfo& classinfo) const {
string str;
if(thisType.isNested && !JDecompiler::getInstance().hasClass(thisType.enclosingClass->getEncodedName()))
str += thisType.isAnonymous ? "/* anonymous class */\n" :
"/* nested class of class " + thisType.enclosingClass->getName() + " */\n";
if(modifiers & ACC_INTERFACE && superType != nullptr && *superType != javaLang::Object) {
throw DecompilationException("interface " + thisType.getName() + " cannot inherit from other class than java.lang.Object");
}
str += classinfo.getIndent() + modifiersToString(modifiers) + ' ' + thisType.simpleName +
(genericParameters.empty() ? EMPTY_STRING : '<' + join<const GenericParameter*>(genericParameters,
[&classinfo] (const GenericParameter* parameter) { return parameter->toString(classinfo); }) + '>') +
(superType == nullptr || *superType == javaLang::Object || (modifiers & ACC_ENUM && *superType == javaLang::Enum) ?
EMPTY_STRING : " extends " + superType->toString(classinfo));
vector<const ClassType*> interfacesToStringify;
for(const ClassType* interface : interfaces) {
if(modifiers & ACC_ANNOTATION && *interface == javaLangAnnotation::Annotation)
continue;
interfacesToStringify.push_back(interface);
}
if(!interfacesToStringify.empty())
str += (modifiers & ACC_INTERFACE ? " extends " : " implements ") +
join<const ClassType*>(interfacesToStringify, [&classinfo] (auto interface) { return interface->toString(classinfo); });
return str;
}
string Class::modifiersToString(uint16_t modifiers) const {
format_string str;
bool isInnerProtected = false;
if(thisType.isNested) {
const InnerClassesAttribute* innerClasses = attributes.get<InnerClassesAttribute>();
if(innerClasses != nullptr) {
const InnerClass* innerClass = innerClasses->find(thisType);
if(innerClass != nullptr) {
const uint16_t innerClassModifiers = innerClass->modifiers;
if(innerClassModifiers & ACC_PRIVATE) str += "private";
if(innerClassModifiers & ACC_PROTECTED) {
str += "protected";
isInnerProtected = true;
}
if(innerClassModifiers & ACC_STATIC) str += "static";
if((innerClassModifiers & ~(ACC_ACCESS_FLAGS | ACC_STATIC | ACC_SUPER)) != (modifiers & ~(ACC_ACCESS_FLAGS | ACC_SUPER)))
warning("modifiers of class " + thisType.getName() + " are not matching to the modifiers in InnerClasses attribute:"
+ hexWithPrefix<4>(innerClassModifiers) + ' ' + hexWithPrefix<4>(modifiers));
}
}
}
switch(modifiers & ACC_ACCESS_FLAGS) {
case ACC_VISIBLE: break;
case ACC_PUBLIC:
if(!isInnerProtected)
str += "public";
break;
default:
throw IllegalModifiersException("in class " + thisType.getName() + ": " + hexWithPrefix<4>(modifiers));
}
if(modifiers & ACC_STRICT) str += "strictfp";
switch(modifiers & (ACC_FINAL | ACC_ABSTRACT | ACC_INTERFACE | ACC_ANNOTATION | ACC_ENUM)) {
case 0:
str += "class"; break;
case ACC_FINAL:
str += "final class"; break;
case ACC_ABSTRACT:
str += "abstract class"; break;
case ACC_ABSTRACT | ACC_INTERFACE:
str += "interface"; break;
case ACC_ABSTRACT | ACC_INTERFACE | ACC_ANNOTATION:
str += "@interface"; break;
case ACC_ENUM: case ACC_FINAL | ACC_ENUM: case ACC_ABSTRACT | ACC_ENUM:
str += "enum"; break;
default:
throw IllegalModifiersException("in class " + thisType.getName() + ": " + hexWithPrefix<4>(modifiers));
}
return (string)str;
}
string Class::fieldsToString(const ClassInfo& classinfo) const {
string str;
bool anyFieldStringified = false;
for(const Field* field : fields) {
if(field->canStringify(classinfo)) {
str += '\n' + field->toString(fieldStringifyContext) + ';';
anyFieldStringified = true;
}
}
if(anyFieldStringified)
str += '\n';
return str;
}
string Class::methodsToString(const ClassInfo& classinfo) const {
string str;
for(const Method* method : methods) {
if(method->canStringify(classinfo)) {
log("stringify of", method->descriptor.toString());
str += '\n' + method->toString(classinfo) + '\n';
}
}
return str;
}
string Class::innerClassesToString(const ClassInfo& classinfo) const {
string str;
const NestMembersAttribute* nestMembers = attributes.get<NestMembersAttribute>();
if(nestMembers != nullptr) {
for(const ClassType* nestMember : nestMembers->nestMembers) {
if(nestMember->isAnonymous)
continue;
const Class* nestClass = JDecompiler::getInstance().getClass(nestMember->getClassEncodedName());
if(nestClass != nullptr) {
nestClass->classinfo.copyFormattingFrom(classinfo);
str += '\n' + nestClass->toString() + '\n';
nestClass->classinfo.resetFormatting();
} else {
warning("cannot load inner class " + nestMember->getName());
}
}
}
return str;
}
}
#endif