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/*
* Copyright 2000-2017 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.java.decompiler.main;
import org.jetbrains.java.decompiler.code.CodeConstants;
import org.jetbrains.java.decompiler.main.ClassesProcessor.ClassNode;
import org.jetbrains.java.decompiler.main.collectors.BytecodeMappingTracer;
import org.jetbrains.java.decompiler.main.extern.IFernflowerLogger;
import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences;
import org.jetbrains.java.decompiler.main.rels.ClassWrapper;
import org.jetbrains.java.decompiler.main.rels.MethodWrapper;
import org.jetbrains.java.decompiler.modules.decompiler.ExprProcessor;
import org.jetbrains.java.decompiler.modules.decompiler.exps.*;
import org.jetbrains.java.decompiler.modules.decompiler.stats.RootStatement;
import org.jetbrains.java.decompiler.modules.decompiler.vars.VarTypeProcessor;
import org.jetbrains.java.decompiler.modules.decompiler.vars.VarVersionPair;
import org.jetbrains.java.decompiler.modules.renamer.PoolInterceptor;
import org.jetbrains.java.decompiler.struct.StructClass;
import org.jetbrains.java.decompiler.struct.StructField;
import org.jetbrains.java.decompiler.struct.StructMember;
import org.jetbrains.java.decompiler.struct.StructMethod;
import org.jetbrains.java.decompiler.struct.attr.*;
import org.jetbrains.java.decompiler.struct.consts.PrimitiveConstant;
import org.jetbrains.java.decompiler.struct.gen.FieldDescriptor;
import org.jetbrains.java.decompiler.struct.gen.MethodDescriptor;
import org.jetbrains.java.decompiler.struct.gen.VarType;
import org.jetbrains.java.decompiler.struct.gen.generics.*;
import org.jetbrains.java.decompiler.util.InterpreterUtil;
import java.util.*;
public class ClassWriter {
private final PoolInterceptor interceptor;
public ClassWriter() {
interceptor = DecompilerContext.getPoolInterceptor();
}
private static void invokeProcessors(ClassNode node) {
ClassWrapper wrapper = node.getWrapper();
StructClass cl = wrapper.getClassStruct();
InitializerProcessor.extractInitializers(wrapper);
if (node.type == ClassNode.CLASS_ROOT &&
!cl.isVersionGE_1_5() &&
DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_CLASS_1_4)) {
ClassReference14Processor.processClassReferences(node);
}
if (cl.hasModifier(CodeConstants.ACC_ENUM) && DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_ENUM)) {
EnumProcessor.clearEnum(wrapper);
}
if (DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_ASSERTIONS)) {
AssertProcessor.buildAssertions(node);
}
}
public void classLambdaToJava(ClassNode node, TextBuffer buffer, Exprent method_object, int indent, BytecodeMappingTracer origTracer) {
ClassWrapper wrapper = node.getWrapper();
if (wrapper == null) {
return;
}
boolean lambdaToAnonymous = DecompilerContext.getOption(IFernflowerPreferences.LAMBDA_TO_ANONYMOUS_CLASS);
ClassNode outerNode = (ClassNode)DecompilerContext.getProperty(DecompilerContext.CURRENT_CLASS_NODE);
DecompilerContext.setProperty(DecompilerContext.CURRENT_CLASS_NODE, node);
BytecodeMappingTracer tracer = new BytecodeMappingTracer(origTracer.getCurrentSourceLine());
try {
StructClass cl = wrapper.getClassStruct();
DecompilerContext.getLogger().startWriteClass(node.simpleName);
if (node.lambdaInformation.is_method_reference) {
if (!node.lambdaInformation.is_content_method_static && method_object != null) {
// reference to a virtual method
buffer.append(method_object.toJava(indent, tracer));
}
else {
// reference to a static method
buffer.append(ExprProcessor.getCastTypeName(new VarType(node.lambdaInformation.content_class_name, true)));
}
buffer.append("::")
.append(CodeConstants.INIT_NAME.equals(node.lambdaInformation.content_method_name) ? "new" : node.lambdaInformation.content_method_name);
}
else {
// lambda method
StructMethod mt = cl.getMethod(node.lambdaInformation.content_method_key);
MethodWrapper methodWrapper = wrapper.getMethodWrapper(mt.getName(), mt.getDescriptor());
MethodDescriptor md_content = MethodDescriptor.parseDescriptor(node.lambdaInformation.content_method_descriptor);
MethodDescriptor md_lambda = MethodDescriptor.parseDescriptor(node.lambdaInformation.method_descriptor);
if (!lambdaToAnonymous) {
buffer.append('(');
boolean firstParameter = true;
int index = node.lambdaInformation.is_content_method_static ? 0 : 1;
int start_index = md_content.params.length - md_lambda.params.length;
for (int i = 0; i < md_content.params.length; i++) {
if (i >= start_index) {
if (!firstParameter) {
buffer.append(", ");
}
String parameterName = methodWrapper.varproc.getVarName(new VarVersionPair(index, 0));
buffer.append(parameterName == null ? "param" + index : parameterName); // null iff decompiled with errors
firstParameter = false;
}
index += md_content.params[i].stackSize;
}
buffer.append(") ->");
}
buffer.append(" {").appendLineSeparator();
tracer.incrementCurrentSourceLine();
methodLambdaToJava(node, wrapper, mt, buffer, indent + 1, !lambdaToAnonymous, tracer);
buffer.appendIndent(indent).append("}");
addTracer(cl, mt, tracer);
}
}
finally {
DecompilerContext.setProperty(DecompilerContext.CURRENT_CLASS_NODE, outerNode);
}
DecompilerContext.getLogger().endWriteClass();
}
public void classToJava(ClassNode node, TextBuffer buffer, int indent, BytecodeMappingTracer tracer) {
ClassNode outerNode = (ClassNode)DecompilerContext.getProperty(DecompilerContext.CURRENT_CLASS_NODE);
DecompilerContext.setProperty(DecompilerContext.CURRENT_CLASS_NODE, node);
int startLine = tracer != null ? tracer.getCurrentSourceLine() : 0;
BytecodeMappingTracer dummy_tracer = new BytecodeMappingTracer(startLine);
try {
// last minute processing
invokeProcessors(node);
ClassWrapper wrapper = node.getWrapper();
StructClass cl = wrapper.getClassStruct();
DecompilerContext.getLogger().startWriteClass(cl.qualifiedName);
// write class definition
int start_class_def = buffer.length();
writeClassDefinition(node, buffer, indent);
boolean hasContent = false;
boolean enumFields = false;
dummy_tracer.incrementCurrentSourceLine(buffer.countLines(start_class_def));
for (StructField fd : cl.getFields()) {
boolean hide = fd.isSynthetic() && DecompilerContext.getOption(IFernflowerPreferences.REMOVE_SYNTHETIC) ||
wrapper.getHiddenMembers().contains(InterpreterUtil.makeUniqueKey(fd.getName(), fd.getDescriptor()));
if (hide) continue;
boolean isEnum = fd.hasModifier(CodeConstants.ACC_ENUM) && DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_ENUM);
if (isEnum) {
if (enumFields) {
buffer.append(',').appendLineSeparator();
dummy_tracer.incrementCurrentSourceLine();
}
enumFields = true;
}
else if (enumFields) {
buffer.append(';');
buffer.appendLineSeparator();
buffer.appendLineSeparator();
dummy_tracer.incrementCurrentSourceLine(2);
enumFields = false;
}
fieldToJava(wrapper, cl, fd, buffer, indent + 1, dummy_tracer); // FIXME: insert real tracer
hasContent = true;
}
if (enumFields) {
buffer.append(';').appendLineSeparator();
dummy_tracer.incrementCurrentSourceLine();
}
// FIXME: fields don't matter at the moment
startLine += buffer.countLines(start_class_def);
// methods
for (StructMethod mt : cl.getMethods()) {
boolean hide = mt.isSynthetic() && DecompilerContext.getOption(IFernflowerPreferences.REMOVE_SYNTHETIC) ||
mt.hasModifier(CodeConstants.ACC_BRIDGE) && DecompilerContext.getOption(IFernflowerPreferences.REMOVE_BRIDGE) ||
wrapper.getHiddenMembers().contains(InterpreterUtil.makeUniqueKey(mt.getName(), mt.getDescriptor()));
if (hide) continue;
int position = buffer.length();
int storedLine = startLine;
if (hasContent) {
buffer.appendLineSeparator();
startLine++;
}
BytecodeMappingTracer method_tracer = new BytecodeMappingTracer(startLine);
boolean methodSkipped = !methodToJava(node, mt, buffer, indent + 1, method_tracer);
if (!methodSkipped) {
hasContent = true;
addTracer(cl, mt, method_tracer);
startLine = method_tracer.getCurrentSourceLine();
}
else {
buffer.setLength(position);
startLine = storedLine;
}
}
// member classes
for (ClassNode inner : node.nested) {
if (inner.type == ClassNode.CLASS_MEMBER) {
StructClass innerCl = inner.classStruct;
boolean isSynthetic = (inner.access & CodeConstants.ACC_SYNTHETIC) != 0 || innerCl.isSynthetic() || inner.namelessConstructorStub;
boolean hide = isSynthetic && DecompilerContext.getOption(IFernflowerPreferences.REMOVE_SYNTHETIC) ||
wrapper.getHiddenMembers().contains(innerCl.qualifiedName);
if (hide) continue;
if (hasContent) {
buffer.appendLineSeparator();
startLine++;
}
BytecodeMappingTracer class_tracer = new BytecodeMappingTracer(startLine);
classToJava(inner, buffer, indent + 1, class_tracer);
startLine = buffer.countLines();
hasContent = true;
}
}
buffer.appendIndent(indent).append('}');
if (node.type != ClassNode.CLASS_ANONYMOUS) {
buffer.appendLineSeparator();
}
}
finally {
DecompilerContext.setProperty(DecompilerContext.CURRENT_CLASS_NODE, outerNode);
}
DecompilerContext.getLogger().endWriteClass();
}
private static void addTracer(StructClass cls, StructMethod method, BytecodeMappingTracer tracer) {
StructLineNumberTableAttribute table =
(StructLineNumberTableAttribute)method.getAttribute(StructGeneralAttribute.ATTRIBUTE_LINE_NUMBER_TABLE);
tracer.setLineNumberTable(table);
String key = InterpreterUtil.makeUniqueKey(method.getName(), method.getDescriptor());
DecompilerContext.getBytecodeSourceMapper().addTracer(cls.qualifiedName, key, tracer);
}
private void writeClassDefinition(ClassNode node, TextBuffer buffer, int indent) {
if (node.type == ClassNode.CLASS_ANONYMOUS) {
buffer.append(" {").appendLineSeparator();
return;
}
ClassWrapper wrapper = node.getWrapper();
StructClass cl = wrapper.getClassStruct();
int flags = node.type == ClassNode.CLASS_ROOT ? cl.getAccessFlags() : node.access;
boolean isDeprecated = cl.hasAttribute("Deprecated");
boolean isSynthetic = (flags & CodeConstants.ACC_SYNTHETIC) != 0 || cl.hasAttribute("Synthetic");
boolean isEnum = DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_ENUM) && (flags & CodeConstants.ACC_ENUM) != 0;
boolean isInterface = (flags & CodeConstants.ACC_INTERFACE) != 0;
boolean isAnnotation = (flags & CodeConstants.ACC_ANNOTATION) != 0;
if (isDeprecated) {
appendDeprecation(buffer, indent);
}
if (interceptor != null) {
String oldName = interceptor.getOldName(cl.qualifiedName);
appendRenameComment(buffer, oldName, MType.CLASS, indent);
}
if (isSynthetic) {
appendComment(buffer, "synthetic class", indent);
}
appendAnnotations(buffer, indent, cl, -1);
buffer.appendIndent(indent);
if (isEnum) {
// remove abstract and final flags (JLS 8.9 Enums)
flags &= ~CodeConstants.ACC_ABSTRACT;
flags &= ~CodeConstants.ACC_FINAL;
}
appendModifiers(buffer, flags, CLASS_ALLOWED, isInterface, CLASS_EXCLUDED);
if (isEnum) {
buffer.append("enum ");
}
else if (isInterface) {
if (isAnnotation) {
buffer.append('@');
}
buffer.append("interface ");
}
else {
buffer.append("class ");
}
buffer.append(node.simpleName);
GenericClassDescriptor descriptor = getGenericClassDescriptor(cl);
if (descriptor != null && !descriptor.fparameters.isEmpty()) {
appendTypeParameters(buffer, descriptor.fparameters, descriptor.fbounds);
}
buffer.append(' ');
if (!isEnum && !isInterface && cl.superClass != null) {
VarType supertype = new VarType(cl.superClass.getString(), true);
if (!VarType.VARTYPE_OBJECT.equals(supertype)) {
buffer.append("extends ");
if (descriptor != null) {
buffer.append(GenericMain.getGenericCastTypeName(descriptor.superclass));
}
else {
buffer.append(ExprProcessor.getCastTypeName(supertype));
}
buffer.append(' ');
}
}
if (!isAnnotation) {
int[] interfaces = cl.getInterfaces();
if (interfaces.length > 0) {
buffer.append(isInterface ? "extends " : "implements ");
for (int i = 0; i < interfaces.length; i++) {
if (i > 0) {
buffer.append(", ");
}
if (descriptor != null) {
buffer.append(GenericMain.getGenericCastTypeName(descriptor.superinterfaces.get(i)));
}
else {
buffer.append(ExprProcessor.getCastTypeName(new VarType(cl.getInterface(i), true)));
}
}
buffer.append(' ');
}
}
buffer.append('{').appendLineSeparator();
}
private void fieldToJava(ClassWrapper wrapper, StructClass cl, StructField fd, TextBuffer buffer, int indent, BytecodeMappingTracer tracer) {
int start = buffer.length();
boolean isInterface = cl.hasModifier(CodeConstants.ACC_INTERFACE);
boolean isDeprecated = fd.hasAttribute("Deprecated");
boolean isEnum = fd.hasModifier(CodeConstants.ACC_ENUM) && DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_ENUM);
if (isDeprecated) {
appendDeprecation(buffer, indent);
}
if (interceptor != null) {
String oldName = interceptor.getOldName(cl.qualifiedName + " " + fd.getName() + " " + fd.getDescriptor());
appendRenameComment(buffer, oldName, MType.FIELD, indent);
}
if (fd.isSynthetic()) {
appendComment(buffer, "synthetic field", indent);
}
appendAnnotations(buffer, indent, fd, TypeAnnotation.FIELD);
buffer.appendIndent(indent);
if (!isEnum) {
appendModifiers(buffer, fd.getAccessFlags(), FIELD_ALLOWED, isInterface, FIELD_EXCLUDED);
}
VarType fieldType = new VarType(fd.getDescriptor(), false);
GenericFieldDescriptor descriptor = null;
if (DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_GENERIC_SIGNATURES)) {
StructGenericSignatureAttribute attr = (StructGenericSignatureAttribute)fd.getAttribute("Signature");
if (attr != null) {
descriptor = GenericMain.parseFieldSignature(attr.getSignature());
}
}
if (!isEnum) {
if (descriptor != null) {
buffer.append(GenericMain.getGenericCastTypeName(descriptor.type));
}
else {
buffer.append(ExprProcessor.getCastTypeName(fieldType));
}
buffer.append(' ');
}
buffer.append(fd.getName());
tracer.incrementCurrentSourceLine(buffer.countLines(start));
Exprent initializer;
if (fd.hasModifier(CodeConstants.ACC_STATIC)) {
initializer = wrapper.getStaticFieldInitializers().getWithKey(InterpreterUtil.makeUniqueKey(fd.getName(), fd.getDescriptor()));
}
else {
initializer = wrapper.getDynamicFieldInitializers().getWithKey(InterpreterUtil.makeUniqueKey(fd.getName(), fd.getDescriptor()));
}
if (initializer != null) {
if (isEnum && initializer.type == Exprent.EXPRENT_NEW) {
NewExprent nexpr = (NewExprent)initializer;
nexpr.setEnumConst(true);
buffer.append(nexpr.toJava(indent, tracer));
}
else {
buffer.append(" = ");
if (initializer.type == Exprent.EXPRENT_CONST) {
((ConstExprent) initializer).adjustConstType(fieldType);
}
// FIXME: special case field initializer. Can map to more than one method (constructor) and bytecode intruction.
buffer.append(initializer.toJava(indent, tracer));
}
}
else if (fd.hasModifier(CodeConstants.ACC_FINAL) && fd.hasModifier(CodeConstants.ACC_STATIC)) {
StructConstantValueAttribute attr =
(StructConstantValueAttribute)fd.getAttribute(StructGeneralAttribute.ATTRIBUTE_CONSTANT_VALUE);
if (attr != null) {
PrimitiveConstant constant = cl.getPool().getPrimitiveConstant(attr.getIndex());
buffer.append(" = ");
buffer.append(new ConstExprent(fieldType, constant.value, null).toJava(indent, tracer));
}
}
if (!isEnum) {
buffer.append(";").appendLineSeparator();
tracer.incrementCurrentSourceLine();
}
}
private static void methodLambdaToJava(ClassNode lambdaNode,
ClassWrapper classWrapper,
StructMethod mt,
TextBuffer buffer,
int indent,
boolean codeOnly, BytecodeMappingTracer tracer) {
MethodWrapper methodWrapper = classWrapper.getMethodWrapper(mt.getName(), mt.getDescriptor());
MethodWrapper outerWrapper = (MethodWrapper)DecompilerContext.getProperty(DecompilerContext.CURRENT_METHOD_WRAPPER);
DecompilerContext.setProperty(DecompilerContext.CURRENT_METHOD_WRAPPER, methodWrapper);
try {
String method_name = lambdaNode.lambdaInformation.method_name;
MethodDescriptor md_content = MethodDescriptor.parseDescriptor(lambdaNode.lambdaInformation.content_method_descriptor);
MethodDescriptor md_lambda = MethodDescriptor.parseDescriptor(lambdaNode.lambdaInformation.method_descriptor);
if (!codeOnly) {
buffer.appendIndent(indent);
buffer.append("public ");
buffer.append(method_name);
buffer.append("(");
boolean firstParameter = true;
int index = lambdaNode.lambdaInformation.is_content_method_static ? 0 : 1;
int start_index = md_content.params.length - md_lambda.params.length;
for (int i = 0; i < md_content.params.length; i++) {
if (i >= start_index) {
if (!firstParameter) {
buffer.append(", ");
}
String typeName = ExprProcessor.getCastTypeName(md_content.params[i].copy());
if (ExprProcessor.UNDEFINED_TYPE_STRING.equals(typeName) &&
DecompilerContext.getOption(IFernflowerPreferences.UNDEFINED_PARAM_TYPE_OBJECT)) {
typeName = ExprProcessor.getCastTypeName(VarType.VARTYPE_OBJECT);
}
buffer.append(typeName);
buffer.append(" ");
String parameterName = methodWrapper.varproc.getVarName(new VarVersionPair(index, 0));
buffer.append(parameterName == null ? "param" + index : parameterName); // null iff decompiled with errors
firstParameter = false;
}
index += md_content.params[i].stackSize;
}
buffer.append(") {").appendLineSeparator();
indent += 1;
}
RootStatement root = classWrapper.getMethodWrapper(mt.getName(), mt.getDescriptor()).root;
if (!methodWrapper.decompiledWithErrors) {
if (root != null) { // check for existence
try {
buffer.append(root.toJava(indent, tracer));
}
catch (Throwable ex) {
DecompilerContext.getLogger().writeMessage("Method " + mt.getName() + " " + mt.getDescriptor() + " couldn't be written.",
IFernflowerLogger.Severity.WARN,
ex);
methodWrapper.decompiledWithErrors = true;
}
}
}
if (methodWrapper.decompiledWithErrors) {
buffer.appendIndent(indent);
buffer.append("// $FF: Couldn't be decompiled");
buffer.appendLineSeparator();
}
if (root != null) {
tracer.addMapping(root.getDummyExit().bytecode);
}
if (!codeOnly) {
indent -= 1;
buffer.appendIndent(indent).append('}').appendLineSeparator();
}
}
finally {
DecompilerContext.setProperty(DecompilerContext.CURRENT_METHOD_WRAPPER, outerWrapper);
}
}
private static String toValidJavaIdentifier(String name) {
if (name == null || name.isEmpty()) return name;
boolean changed = false;
StringBuilder res = new StringBuilder(name.length());
for (int i = 0; i < name.length(); i++) {
char c = name.charAt(i);
if ((i == 0 && !Character.isJavaIdentifierStart(c))
|| (i > 0 && !Character.isJavaIdentifierPart(c))) {
changed = true;
res.append("_");
}
else {
res.append(c);
}
}
if (!changed) {
return name;
}
return res.append("/* $FF was: ").append(name).append("*/").toString();
}
private boolean methodToJava(ClassNode node, StructMethod mt, TextBuffer buffer, int indent, BytecodeMappingTracer tracer) {
ClassWrapper wrapper = node.getWrapper();
StructClass cl = wrapper.getClassStruct();
MethodWrapper methodWrapper = wrapper.getMethodWrapper(mt.getName(), mt.getDescriptor());
boolean hideMethod = false;
int start_index_method = buffer.length();
MethodWrapper outerWrapper = (MethodWrapper)DecompilerContext.getProperty(DecompilerContext.CURRENT_METHOD_WRAPPER);
DecompilerContext.setProperty(DecompilerContext.CURRENT_METHOD_WRAPPER, methodWrapper);
try {
boolean isInterface = cl.hasModifier(CodeConstants.ACC_INTERFACE);
boolean isAnnotation = cl.hasModifier(CodeConstants.ACC_ANNOTATION);
boolean isEnum = cl.hasModifier(CodeConstants.ACC_ENUM) && DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_ENUM);
boolean isDeprecated = mt.hasAttribute("Deprecated");
boolean clinit = false, init = false, dinit = false;
MethodDescriptor md = MethodDescriptor.parseDescriptor(mt.getDescriptor());
int flags = mt.getAccessFlags();
if ((flags & CodeConstants.ACC_NATIVE) != 0) {
flags &= ~CodeConstants.ACC_STRICT; // compiler bug: a strictfp class sets all methods to strictfp
}
if (CodeConstants.CLINIT_NAME.equals(mt.getName())) {
flags &= CodeConstants.ACC_STATIC; // ignore all modifiers except 'static' in a static initializer
}
if (isDeprecated) {
appendDeprecation(buffer, indent);
}
if (interceptor != null) {
String oldName = interceptor.getOldName(cl.qualifiedName + " " + mt.getName() + " " + mt.getDescriptor());
appendRenameComment(buffer, oldName, MType.METHOD, indent);
}
boolean isSynthetic = (flags & CodeConstants.ACC_SYNTHETIC) != 0 || mt.hasAttribute("Synthetic");
boolean isBridge = (flags & CodeConstants.ACC_BRIDGE) != 0;
if (isSynthetic) {
appendComment(buffer, "synthetic method", indent);
}
if (isBridge) {
appendComment(buffer, "bridge method", indent);
}
appendAnnotations(buffer, indent, mt, TypeAnnotation.METHOD_RETURN_TYPE);
buffer.appendIndent(indent);
appendModifiers(buffer, flags, METHOD_ALLOWED, isInterface, METHOD_EXCLUDED);
if (isInterface && !mt.hasModifier(CodeConstants.ACC_STATIC) && mt.containsCode()) {
// 'default' modifier (Java 8)
buffer.append("default ");
}
String name = mt.getName();
if (CodeConstants.INIT_NAME.equals(name)) {
if (node.type == ClassNode.CLASS_ANONYMOUS) {
name = "";
dinit = true;
}
else {
name = node.simpleName;
init = true;
}
}
else if (CodeConstants.CLINIT_NAME.equals(name)) {
name = "";
clinit = true;
}
GenericMethodDescriptor descriptor = null;
if (DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_GENERIC_SIGNATURES)) {
StructGenericSignatureAttribute attr = (StructGenericSignatureAttribute)mt.getAttribute("Signature");
if (attr != null) {
descriptor = GenericMain.parseMethodSignature(attr.getSignature());
if (descriptor != null) {
long actualParams = md.params.length;
List sigFields = methodWrapper.signatureFields;
if (sigFields != null) {
actualParams = sigFields.stream().filter(Objects::isNull).count();
}
else if (isEnum && init) actualParams -= 2;
if (actualParams != descriptor.params.size()) {
String message = "Inconsistent generic signature in method " + mt.getName() + " " + mt.getDescriptor() + " in " + cl.qualifiedName;
DecompilerContext.getLogger().writeMessage(message, IFernflowerLogger.Severity.WARN);
descriptor = null;
}
}
}
}
boolean throwsExceptions = false;
int paramCount = 0;
if (!clinit && !dinit) {
boolean thisVar = !mt.hasModifier(CodeConstants.ACC_STATIC);
if (descriptor != null && !descriptor.fparameters.isEmpty()) {
appendTypeParameters(buffer, descriptor.fparameters, descriptor.fbounds);
buffer.append(' ');
}
if (!init) {
if (descriptor != null) {
buffer.append(GenericMain.getGenericCastTypeName(descriptor.ret));
}
else {
buffer.append(ExprProcessor.getCastTypeName(md.ret));
}
buffer.append(' ');
}
buffer.append(toValidJavaIdentifier(name));
buffer.append('(');
// parameters
List signFields = methodWrapper.signatureFields;
int lastVisibleParameterIndex = -1;
for (int i = 0; i < md.params.length; i++) {
if (signFields == null || signFields.get(i) == null) {
lastVisibleParameterIndex = i;
}
}
boolean firstParameter = true;
int index = isEnum && init ? 3 : thisVar ? 1 : 0;
boolean hasDescriptor = descriptor != null;
int start = isEnum && init && !hasDescriptor ? 2 : 0;
int params = hasDescriptor ? descriptor.params.size() : md.params.length;
for (int i = start; i < params; i++) {
if (hasDescriptor || (signFields == null || signFields.get(i) == null)) {
if (!firstParameter) {
buffer.append(", ");
}
appendParameterAnnotations(buffer, mt, paramCount);
if (methodWrapper.varproc.getVarFinal(new VarVersionPair(index, 0)) == VarTypeProcessor.VAR_EXPLICIT_FINAL) {
buffer.append("final ");
}
if (descriptor != null) {
GenericType parameterType = descriptor.params.get(i);
boolean isVarArg = (i == lastVisibleParameterIndex && mt.hasModifier(CodeConstants.ACC_VARARGS) && parameterType.arrayDim > 0);
if (isVarArg) {
parameterType = parameterType.decreaseArrayDim();
}
String typeName = GenericMain.getGenericCastTypeName(parameterType);
if (ExprProcessor.UNDEFINED_TYPE_STRING.equals(typeName) &&
DecompilerContext.getOption(IFernflowerPreferences.UNDEFINED_PARAM_TYPE_OBJECT)) {
typeName = ExprProcessor.getCastTypeName(VarType.VARTYPE_OBJECT);
}
buffer.append(typeName);
if (isVarArg) {
buffer.append("...");
}
}
else {
VarType parameterType = md.params[i];
boolean isVarArg = (i == lastVisibleParameterIndex && mt.hasModifier(CodeConstants.ACC_VARARGS) && parameterType.arrayDim > 0);
if (isVarArg) {
parameterType = parameterType.decreaseArrayDim();
}
String typeName = ExprProcessor.getCastTypeName(parameterType);
if (ExprProcessor.UNDEFINED_TYPE_STRING.equals(typeName) &&
DecompilerContext.getOption(IFernflowerPreferences.UNDEFINED_PARAM_TYPE_OBJECT)) {
typeName = ExprProcessor.getCastTypeName(VarType.VARTYPE_OBJECT);
}
buffer.append(typeName);
if (isVarArg) {
buffer.append("...");
}
}
buffer.append(' ');
String parameterName = methodWrapper.varproc.getVarName(new VarVersionPair(index, 0));
buffer.append(parameterName == null ? "param" + index : parameterName); // null iff decompiled with errors
firstParameter = false;
paramCount++;
}
index += md.params[i].stackSize;
}
buffer.append(')');
StructExceptionsAttribute attr = (StructExceptionsAttribute)mt.getAttribute("Exceptions");
if ((descriptor != null && !descriptor.exceptions.isEmpty()) || attr != null) {
throwsExceptions = true;
buffer.append(" throws ");
for (int i = 0; i < attr.getThrowsExceptions().size(); i++) {
if (i > 0) {
buffer.append(", ");
}
if (descriptor != null && !descriptor.exceptions.isEmpty()) {
GenericType type = descriptor.exceptions.get(i);
buffer.append(GenericMain.getGenericCastTypeName(type));
}
else {
VarType type = new VarType(attr.getExcClassname(i, cl.getPool()), true);
buffer.append(ExprProcessor.getCastTypeName(type));
}
}
}
}
tracer.incrementCurrentSourceLine(buffer.countLines(start_index_method));
if ((flags & (CodeConstants.ACC_ABSTRACT | CodeConstants.ACC_NATIVE)) != 0) { // native or abstract method (explicit or interface)
if (isAnnotation) {
StructAnnDefaultAttribute attr = (StructAnnDefaultAttribute)mt.getAttribute("AnnotationDefault");
if (attr != null) {
buffer.append(" default ");
buffer.append(attr.getDefaultValue().toJava(0, BytecodeMappingTracer.DUMMY));
}
}
buffer.append(';');
buffer.appendLineSeparator();
tracer.incrementCurrentSourceLine();
}
else {
if (!clinit && !dinit) {
buffer.append(' ');
}
// We do not have line information for method start, lets have it here for now
buffer.append('{').appendLineSeparator();
tracer.incrementCurrentSourceLine();
RootStatement root = wrapper.getMethodWrapper(mt.getName(), mt.getDescriptor()).root;
if (root != null && !methodWrapper.decompiledWithErrors) { // check for existence
try {
TextBuffer code = root.toJava(indent + 1, tracer);
hideMethod = (clinit || dinit || hideConstructor(wrapper, init, throwsExceptions, paramCount)) && code.length() == 0;
buffer.append(code);
}
catch (Throwable ex) {
DecompilerContext.getLogger()
.writeMessage("Method " + mt.getName() + " " + mt.getDescriptor() + " couldn't be written.",
IFernflowerLogger.Severity.WARN,
ex);
methodWrapper.decompiledWithErrors = true;
}
}
if (methodWrapper.decompiledWithErrors) {
buffer.appendIndent(indent + 1);
buffer.append("// $FF: Couldn't be decompiled");
buffer.appendLineSeparator();
tracer.incrementCurrentSourceLine();
}
if (root != null) {
tracer.addMapping(root.getDummyExit().bytecode);
}
buffer.appendIndent(indent).append('}').appendLineSeparator();
tracer.incrementCurrentSourceLine();
}
}
finally {
DecompilerContext.setProperty(DecompilerContext.CURRENT_METHOD_WRAPPER, outerWrapper);
}
// save total lines
// TODO: optimize
//tracer.setCurrentSourceLine(buffer.countLines(start_index_method));
return !hideMethod;
}
private static boolean hideConstructor(ClassWrapper wrapper, boolean init, boolean throwsExceptions, int paramCount) {
if (!init || throwsExceptions || paramCount > 0 || !DecompilerContext.getOption(IFernflowerPreferences.HIDE_DEFAULT_CONSTRUCTOR)) {
return false;
}
int count = 0;
for (StructMethod mt : wrapper.getClassStruct().getMethods()) {
if (CodeConstants.INIT_NAME.equals(mt.getName())) {
if (++count > 1) {
return false;
}
}
}
return true;
}
private static void appendDeprecation(TextBuffer buffer, int indent) {
buffer.appendIndent(indent).append("/** @deprecated */").appendLineSeparator();
}
private enum MType {CLASS, FIELD, METHOD}
private static void appendRenameComment(TextBuffer buffer, String oldName, MType type, int indent) {
if (oldName == null) return;
buffer.appendIndent(indent);
buffer.append("// $FF: renamed from: ");
switch (type) {
case CLASS:
buffer.append(ExprProcessor.buildJavaClassName(oldName));
break;
case FIELD:
String[] fParts = oldName.split(" ");
FieldDescriptor fd = FieldDescriptor.parseDescriptor(fParts[2]);
buffer.append(fParts[1]);
buffer.append(' ');
buffer.append(getTypePrintOut(fd.type));
break;
default:
String[] mParts = oldName.split(" ");
MethodDescriptor md = MethodDescriptor.parseDescriptor(mParts[2]);
buffer.append(mParts[1]);
buffer.append(" (");
boolean first = true;
for (VarType paramType : md.params) {
if (!first) {
buffer.append(", ");
}
first = false;
buffer.append(getTypePrintOut(paramType));
}
buffer.append(") ");
buffer.append(getTypePrintOut(md.ret));
}
buffer.appendLineSeparator();
}
private static String getTypePrintOut(VarType type) {
String typeText = ExprProcessor.getCastTypeName(type, false);
if (ExprProcessor.UNDEFINED_TYPE_STRING.equals(typeText) &&
DecompilerContext.getOption(IFernflowerPreferences.UNDEFINED_PARAM_TYPE_OBJECT)) {
typeText = ExprProcessor.getCastTypeName(VarType.VARTYPE_OBJECT, false);
}
return typeText;
}
private static void appendComment(TextBuffer buffer, String comment, int indent) {
buffer.appendIndent(indent).append("// $FF: ").append(comment).appendLineSeparator();
}
private static final String[] ANNOTATION_ATTRIBUTES = {
StructGeneralAttribute.ATTRIBUTE_RUNTIME_VISIBLE_ANNOTATIONS, StructGeneralAttribute.ATTRIBUTE_RUNTIME_INVISIBLE_ANNOTATIONS};
private static final String[] PARAMETER_ANNOTATION_ATTRIBUTES = {
StructGeneralAttribute.ATTRIBUTE_RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS, StructGeneralAttribute.ATTRIBUTE_RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS};
private static final String[] TYPE_ANNOTATION_ATTRIBUTES = {
StructGeneralAttribute.ATTRIBUTE_RUNTIME_VISIBLE_TYPE_ANNOTATIONS, StructGeneralAttribute.ATTRIBUTE_RUNTIME_INVISIBLE_TYPE_ANNOTATIONS};
private static void appendAnnotations(TextBuffer buffer, int indent, StructMember mb, int targetType) {
Set filter = new HashSet<>();
for (String name : ANNOTATION_ATTRIBUTES) {
StructAnnotationAttribute attribute = (StructAnnotationAttribute)mb.getAttribute(name);
if (attribute != null) {
for (AnnotationExprent annotation : attribute.getAnnotations()) {
String text = annotation.toJava(indent, BytecodeMappingTracer.DUMMY).toString();
filter.add(text);
buffer.append(text).appendLineSeparator();
}
}
}
appendTypeAnnotations(buffer, indent, mb, targetType, -1, filter);
}
private static void appendParameterAnnotations(TextBuffer buffer, StructMethod mt, int param) {
Set filter = new HashSet<>();
for (String name : PARAMETER_ANNOTATION_ATTRIBUTES) {
StructAnnotationParameterAttribute attribute = (StructAnnotationParameterAttribute)mt.getAttribute(name);
if (attribute != null) {
List> annotations = attribute.getParamAnnotations();
if (param < annotations.size()) {
for (AnnotationExprent annotation : annotations.get(param)) {
String text = annotation.toJava(-1, BytecodeMappingTracer.DUMMY).toString();
filter.add(text);
buffer.append(text).append(' ');
}
}
}
}
appendTypeAnnotations(buffer, -1, mt, TypeAnnotation.METHOD_PARAMETER, param, filter);
}
private static void appendTypeAnnotations(TextBuffer buffer, int indent, StructMember mb, int targetType, int index, Set filter) {
for (String name : TYPE_ANNOTATION_ATTRIBUTES) {
StructTypeAnnotationAttribute attribute = (StructTypeAnnotationAttribute)mb.getAttribute(name);
if (attribute != null) {
for (TypeAnnotation annotation : attribute.getAnnotations()) {
if (annotation.isTopLevel() && annotation.getTargetType() == targetType && (index < 0 || annotation.getIndex() == index)) {
String text = annotation.getAnnotation().toJava(indent, BytecodeMappingTracer.DUMMY).toString();
if (!filter.contains(text)) {
buffer.append(text);
if (indent < 0) {
buffer.append(' ');
}
else {
buffer.appendLineSeparator();
}
}
}
}
}
}
}
private static final Map MODIFIERS;
static {
MODIFIERS = new LinkedHashMap<>();
MODIFIERS.put(CodeConstants.ACC_PUBLIC, "public");
MODIFIERS.put(CodeConstants.ACC_PROTECTED, "protected");
MODIFIERS.put(CodeConstants.ACC_PRIVATE, "private");
MODIFIERS.put(CodeConstants.ACC_ABSTRACT, "abstract");
MODIFIERS.put(CodeConstants.ACC_STATIC, "static");
MODIFIERS.put(CodeConstants.ACC_FINAL, "final");
MODIFIERS.put(CodeConstants.ACC_STRICT, "strictfp");
MODIFIERS.put(CodeConstants.ACC_TRANSIENT, "transient");
MODIFIERS.put(CodeConstants.ACC_VOLATILE, "volatile");
MODIFIERS.put(CodeConstants.ACC_SYNCHRONIZED, "synchronized");
MODIFIERS.put(CodeConstants.ACC_NATIVE, "native");
}
private static final int CLASS_ALLOWED =
CodeConstants.ACC_PUBLIC | CodeConstants.ACC_PROTECTED | CodeConstants.ACC_PRIVATE | CodeConstants.ACC_ABSTRACT |
CodeConstants.ACC_STATIC | CodeConstants.ACC_FINAL | CodeConstants.ACC_STRICT;
private static final int FIELD_ALLOWED =
CodeConstants.ACC_PUBLIC | CodeConstants.ACC_PROTECTED | CodeConstants.ACC_PRIVATE | CodeConstants.ACC_STATIC |
CodeConstants.ACC_FINAL | CodeConstants.ACC_TRANSIENT | CodeConstants.ACC_VOLATILE;
private static final int METHOD_ALLOWED =
CodeConstants.ACC_PUBLIC | CodeConstants.ACC_PROTECTED | CodeConstants.ACC_PRIVATE | CodeConstants.ACC_ABSTRACT |
CodeConstants.ACC_STATIC | CodeConstants.ACC_FINAL | CodeConstants.ACC_SYNCHRONIZED | CodeConstants.ACC_NATIVE |
CodeConstants.ACC_STRICT;
private static final int CLASS_EXCLUDED = CodeConstants.ACC_ABSTRACT | CodeConstants.ACC_STATIC;
private static final int FIELD_EXCLUDED = CodeConstants.ACC_PUBLIC | CodeConstants.ACC_STATIC | CodeConstants.ACC_FINAL;
private static final int METHOD_EXCLUDED = CodeConstants.ACC_PUBLIC | CodeConstants.ACC_ABSTRACT;
private static void appendModifiers(TextBuffer buffer, int flags, int allowed, boolean isInterface, int excluded) {
flags &= allowed;
if (!isInterface) excluded = 0;
for (int modifier : MODIFIERS.keySet()) {
if ((flags & modifier) == modifier && (modifier & excluded) == 0) {
buffer.append(MODIFIERS.get(modifier)).append(' ');
}
}
}
public static GenericClassDescriptor getGenericClassDescriptor(StructClass cl) {
if (DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_GENERIC_SIGNATURES)) {
StructGenericSignatureAttribute attr = (StructGenericSignatureAttribute)cl.getAttribute("Signature");
if (attr != null) {
return GenericMain.parseClassSignature(attr.getSignature());
}
}
return null;
}
public static void appendTypeParameters(TextBuffer buffer, List parameters, List> bounds) {
buffer.append('<');
for (int i = 0; i < parameters.size(); i++) {
if (i > 0) {
buffer.append(", ");
}
buffer.append(parameters.get(i));
List parameterBounds = bounds.get(i);
if (parameterBounds.size() > 1 || !"java/lang/Object".equals(parameterBounds.get(0).value)) {
buffer.append(" extends ");
buffer.append(GenericMain.getGenericCastTypeName(parameterBounds.get(0)));
for (int j = 1; j < parameterBounds.size(); j++) {
buffer.append(" & ");
buffer.append(GenericMain.getGenericCastTypeName(parameterBounds.get(j)));
}
}
}
buffer.append('>');
}
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