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 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.getAttributes().containsKey("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.getAttributes().containsKey("Synthetic");
boolean isBridge = (flags & CodeConstants.ACC_BRIDGE) != 0;
if (isSynthetic) {
appendComment(buffer, "synthetic method", indent);
}
if (isBridge) {
appendComment(buffer, "bridge method", indent);
}
appendAnnotations(buffer, mt, indent);
buffer.appendIndent(indent);
appendModifiers(buffer, flags, METHOD_ALLOWED, isInterface, METHOD_EXCLUDED);
if (isInterface && 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.getAttributes().getWithKey("Signature");
if (attr != null) {
descriptor = GenericMain.parseMethodSignature(attr.getSignature());
if (descriptor != null) {
int actualParams = md.params.length;
List<VarVersionPair> sigFields = methodWrapper.signatureFields;
if (sigFields != null) {
actualParams = 0;
for (VarVersionPair field : methodWrapper.signatureFields) {
if (field == null) {
actualParams++;
}
}
} 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<VarVersionPair> 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.getAttributes().getWithKey("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.getAttributes().getWithKey("AnnotationDefault");
if (attr != null) {
buffer.append(" default ");
buffer.append(
attr.getDefaultValue()
.toJava(indent + 1, new BytecodeMappingTracer())); // dummy tracer
}
}
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
StructLineNumberTableAttribute lineNumberTable =
(StructLineNumberTableAttribute)
mt.getAttributes().getWithKey(StructGeneralAttribute.ATTRIBUTE_LINE_NUMBER_TABLE);
if (lineNumberTable != null
&& DecompilerContext.getOption(IFernflowerPreferences.USE_DEBUG_LINE_NUMBERS)) {
buffer.setCurrentLine(lineNumberTable.getFirstLine() - 1);
}
buffer.append('{').appendLineSeparator();
tracer.incrementCurrentSourceLine();
RootStatement root = wrapper.getMethodWrapper(mt.getName(), mt.getDescriptor()).root;
if (root != null && !methodWrapper.decompiledWithErrors) { // check for existence
try {
int startLine = tracer.getCurrentSourceLine();
TextBuffer code = root.toJava(indent + 1, tracer);
hideMethod =
(clinit || dinit || hideConstructor(wrapper, init, throwsExceptions, paramCount))
&& code.length() == 0;
if (!hideMethod
&& lineNumberTable != null
&& DecompilerContext.getOption(IFernflowerPreferences.USE_DEBUG_LINE_NUMBERS)) {
mapLines(code, lineNumberTable, tracer, startLine);
}
buffer.append(code);
} catch (Throwable ex) {
DecompilerContext.getLogger()
.writeMessage(
"Method " + mt.getName() + " " + mt.getDescriptor() + " couldn't be written.",
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;
}