public ImportCollector(ClassesProcessor.ClassNode root)
{
// set of field names in this class and all its predecessors.
string clName = root.classStruct.qualifiedName;
int index = clName.LastIndexOf('/');
if (index >= 0)
{
string packageName = Sharpen.Runtime.Substring(clName, 0, index);
currentPackageSlash = packageName + '/';
currentPackagePoint = packageName.Replace('/', '.');
}
else
{
currentPackageSlash = string.Empty;
currentPackagePoint = string.Empty;
}
Dictionary <string, StructClass> classes = DecompilerContext.GetStructContext().GetClasses
();
LinkedList <string> queue = new LinkedList <string>();
StructClass currentClass = root.classStruct;
while (currentClass != null)
{
if (currentClass.superClass != null)
{
queue.AddLast(currentClass.superClass.GetString());
}
Sharpen.Collections.AddAll(queue, currentClass.GetInterfaceNames());
// all field names for the current class ..
foreach (StructField f in currentClass.GetFields())
{
setFieldNames.Add(f.GetName());
}
// .. all inner classes for the current class ..
StructInnerClassesAttribute attribute = currentClass.GetAttribute(StructGeneralAttribute
.Attribute_Inner_Classes);
if (attribute != null)
{
foreach (StructInnerClassesAttribute.Entry entry in attribute.GetEntries())
{
if (entry.enclosingName != null && entry.enclosingName.Equals(currentClass.qualifiedName
))
{
setInnerClassNames.Add(entry.simpleName);
}
}
}
// .. and traverse through parent.
currentClass = !(queue.Count == 0) ? classes.GetOrNull(Sharpen.Collections.RemoveFirst
(queue)) : null;
while (currentClass == null && !(queue.Count == 0))
{
currentClass = classes.GetOrNull(Sharpen.Collections.RemoveFirst(queue));
}
}
}
public virtual void LoadClasses(IIdentifierRenamer renamer)
{
Dictionary <string, ClassesProcessor.Inner> mapInnerClasses = new Dictionary <string
, ClassesProcessor.Inner>();
Dictionary <string, HashSet <string> > mapNestedClassReferences = new Dictionary <string
, HashSet <string> >();
Dictionary <string, HashSet <string> > mapEnclosingClassReferences = new Dictionary
<string, HashSet <string> >();
Dictionary <string, string> mapNewSimpleNames = new Dictionary <string, string>();
bool bDecompileInner = DecompilerContext.GetOption(IFernflowerPreferences.Decompile_Inner
);
bool verifyAnonymousClasses = DecompilerContext.GetOption(IFernflowerPreferences
.Verify_Anonymous_Classes);
// create class nodes
foreach (StructClass cl in context.GetClasses().Values)
{
if (cl.IsOwn() && !mapRootClasses.ContainsKey(cl.qualifiedName))
{
if (bDecompileInner)
{
StructInnerClassesAttribute inner = cl.GetAttribute(StructGeneralAttribute.Attribute_Inner_Classes
);
if (inner != null)
{
foreach (StructInnerClassesAttribute.Entry entry in inner.GetEntries())
{
string innerName = entry.innerName;
// original simple name
string simpleName = entry.simpleName;
string savedName = mapNewSimpleNames.GetOrNull(innerName);
if (savedName != null)
{
simpleName = savedName;
}
else if (simpleName != null && renamer != null && renamer.ToBeRenamed(IIdentifierRenamer.Type
.Element_Class, simpleName, null, null))
{
simpleName = renamer.GetNextClassName(innerName, simpleName);
Sharpen.Collections.Put(mapNewSimpleNames, innerName, simpleName);
}
ClassesProcessor.Inner rec = new ClassesProcessor.Inner();
rec.simpleName = simpleName;
rec.type = entry.simpleNameIdx == 0 ? ClassesProcessor.ClassNode.Class_Anonymous :
entry.outerNameIdx == 0 ? ClassesProcessor.ClassNode.Class_Local : ClassesProcessor.ClassNode
.Class_Member;
rec.accessFlags = entry.accessFlags;
// enclosing class
string enclClassName = entry.outerNameIdx != 0 ? entry.enclosingName : cl.qualifiedName;
if (enclClassName == null || innerName.Equals(enclClassName))
{
continue;
}
// invalid name or self reference
if (rec.type == ClassesProcessor.ClassNode.Class_Member && !innerName.Equals(enclClassName
+ '$' + entry.simpleName))
{
continue;
}
// not a real inner class
StructClass enclosingClass = context.GetClasses().GetOrNull(enclClassName);
if (enclosingClass != null && enclosingClass.IsOwn())
{
// own classes only
ClassesProcessor.Inner existingRec = mapInnerClasses.GetOrNull(innerName);
if (existingRec == null)
{
Sharpen.Collections.Put(mapInnerClasses, innerName, rec);
}
else if (!ClassesProcessor.Inner.Equal(existingRec, rec))
{
string message = "Inconsistent inner class entries for " + innerName + "!";
DecompilerContext.GetLogger().WriteMessage(message, IFernflowerLogger.Severity.Warn
);
}
// reference to the nested class
mapNestedClassReferences.ComputeIfAbsent(enclClassName, (string k) => new HashSet
<string>()).Add(innerName);
// reference to the enclosing class
mapEnclosingClassReferences.ComputeIfAbsent(innerName, (string k) => new HashSet <
string>()).Add(enclClassName);
}
}
}
}
ClassesProcessor.ClassNode node = new ClassesProcessor.ClassNode(ClassesProcessor.ClassNode
.Class_Root, cl);
node.access = cl.GetAccessFlags();
Sharpen.Collections.Put(mapRootClasses, cl.qualifiedName, node);
}
}
if (bDecompileInner)
{
// connect nested classes
foreach (KeyValuePair <string, ClassesProcessor.ClassNode> ent in mapRootClasses)
{
// root class?
if (!mapInnerClasses.ContainsKey(ent.Key))
{
HashSet <string> setVisited = new HashSet <string>();
LinkedList <string> stack = new LinkedList <string>();
stack.AddLast(ent.Key);
setVisited.Add(ent.Key);
while (!(stack.Count == 0))
{
string superClass = Sharpen.Collections.RemoveFirst(stack);
ClassesProcessor.ClassNode superNode = mapRootClasses.GetOrNull(superClass);
HashSet <string> setNestedClasses = mapNestedClassReferences.GetOrNull(superClass);
if (setNestedClasses != null)
{
StructClass scl = superNode.classStruct;
StructInnerClassesAttribute inner = scl.GetAttribute(StructGeneralAttribute.Attribute_Inner_Classes
);
if (inner == null || (inner.GetEntries().Count == 0))
{
DecompilerContext.GetLogger().WriteMessage(superClass + " does not contain inner classes!"
, IFernflowerLogger.Severity.Warn);
continue;
}
foreach (StructInnerClassesAttribute.Entry entry in inner.GetEntries())
{
string nestedClass = entry.innerName;
if (!setNestedClasses.Contains(nestedClass))
{
continue;
}
if (!setVisited.Add(nestedClass))
{
continue;
}
ClassesProcessor.ClassNode nestedNode = mapRootClasses.GetOrNull(nestedClass);
if (nestedNode == null)
{
DecompilerContext.GetLogger().WriteMessage("Nested class " + nestedClass + " missing!"
, IFernflowerLogger.Severity.Warn);
continue;
}
ClassesProcessor.Inner rec = mapInnerClasses.GetOrNull(nestedClass);
//if ((Integer)arr[2] == ClassNode.CLASS_MEMBER) {
// FIXME: check for consistent naming
//}
nestedNode.simpleName = rec.simpleName;
nestedNode.type = rec.type;
nestedNode.access = rec.accessFlags;
// sanity checks of the class supposed to be anonymous
if (verifyAnonymousClasses && nestedNode.type == ClassesProcessor.ClassNode.Class_Anonymous &&
!IsAnonymous(nestedNode.classStruct, scl))
{
nestedNode.type = ClassesProcessor.ClassNode.Class_Local;
}
if (nestedNode.type == ClassesProcessor.ClassNode.Class_Anonymous)
{
StructClass cl = nestedNode.classStruct;
// remove static if anonymous class (a common compiler bug)
nestedNode.access &= ~ICodeConstants.Acc_Static;
int[] interfaces = cl.GetInterfaces();
if (interfaces.Length > 0)
{
nestedNode.anonymousClassType = new VarType(cl.GetInterface(0), true);
}
else
{
nestedNode.anonymousClassType = new VarType(cl.superClass.GetString(), true);
}
}
else if (nestedNode.type == ClassesProcessor.ClassNode.Class_Local)
{
// only abstract and final are permitted (a common compiler bug)
nestedNode.access &= (ICodeConstants.Acc_Abstract | ICodeConstants.Acc_Final);
}
superNode.nested.Add(nestedNode);
nestedNode.parent = superNode;
Sharpen.Collections.AddAll(nestedNode.enclosingClasses, mapEnclosingClassReferences
.GetOrNull(nestedClass));
stack.AddLast(nestedClass);
}
}
}
}
}
}
}
private static bool IsAnonymous(StructClass cl, StructClass enclosingCl)
{
// checking super class and interfaces
int[] interfaces = cl.GetInterfaces();
if (interfaces.Length > 0)
{
bool hasNonTrivialSuperClass = cl.superClass != null && !VarType.Vartype_Object.Equals
(new VarType(cl.superClass.GetString(), true));
if (hasNonTrivialSuperClass || interfaces.Length > 1)
{
// can't have multiple 'sources'
string message = "Inconsistent anonymous class definition: '" + cl.qualifiedName
+ "'. Multiple interfaces and/or super class defined.";
DecompilerContext.GetLogger().WriteMessage(message, IFernflowerLogger.Severity.Warn
);
return(false);
}
}
else if (cl.superClass == null)
{
// neither interface nor super class defined
string message = "Inconsistent anonymous class definition: '" + cl.qualifiedName
+ "'. Neither interface nor super class defined.";
DecompilerContext.GetLogger().WriteMessage(message, IFernflowerLogger.Severity.Warn
);
return(false);
}
// FIXME: check constructors
// FIXME: check enclosing class/method
ConstantPool pool = enclosingCl.GetPool();
int refCounter = 0;
bool refNotNew = false;
StructEnclosingMethodAttribute attribute = cl.GetAttribute(StructGeneralAttribute
.Attribute_Enclosing_Method);
string enclosingMethod = attribute != null?attribute.GetMethodName() : null;
// checking references in the enclosing class
foreach (StructMethod mt in enclosingCl.GetMethods())
{
if (enclosingMethod != null && !enclosingMethod.Equals(mt.GetName()))
{
continue;
}
try
{
mt.ExpandData();
InstructionSequence seq = mt.GetInstructionSequence();
if (seq != null)
{
int len = seq.Length();
for (int i = 0; i < len; i++)
{
Instruction instr = seq.GetInstr(i);
switch (instr.opcode)
{
case opc_checkcast:
case opc_instanceof:
{
if (cl.qualifiedName.Equals(pool.GetPrimitiveConstant(instr.Operand(0)).GetString
()))
{
refCounter++;
refNotNew = true;
}
break;
}
case opc_new:
case opc_anewarray:
case opc_multianewarray:
{
if (cl.qualifiedName.Equals(pool.GetPrimitiveConstant(instr.Operand(0)).GetString
()))
{
refCounter++;
}
break;
}
case opc_getstatic:
case opc_putstatic:
{
if (cl.qualifiedName.Equals(pool.GetLinkConstant(instr.Operand(0)).classname))
{
refCounter++;
refNotNew = true;
}
break;
}
}
}
}
mt.ReleaseResources();
}
catch (IOException)
{
string message = "Could not read method while checking anonymous class definition: '"
+ enclosingCl.qualifiedName + "', '" + InterpreterUtil.MakeUniqueKey(mt.GetName
(), mt.GetDescriptor()) + "'";
DecompilerContext.GetLogger().WriteMessage(message, IFernflowerLogger.Severity.Warn
);
return(false);
}
if (refCounter > 1 || refNotNew)
{
string message = "Inconsistent references to the class '" + cl.qualifiedName + "' which is supposed to be anonymous";
DecompilerContext.GetLogger().WriteMessage(message, IFernflowerLogger.Severity.Warn
);
return(false);
}
}
return(true);
}
/// <exception cref="IOException"/>
public virtual void ProcessClass(ClassesProcessor.ClassNode node)
{
foreach (ClassesProcessor.ClassNode child in node.nested)
{
ProcessClass(child);
}
ClassesProcessor clProcessor = DecompilerContext.GetClassProcessor();
StructClass cl = node.classStruct;
if (cl.GetBytecodeVersion() < ICodeConstants.Bytecode_Java_8)
{
// lambda beginning with Java 8
return;
}
StructBootstrapMethodsAttribute bootstrap = cl.GetAttribute(StructGeneralAttribute
.Attribute_Bootstrap_Methods);
if (bootstrap == null || bootstrap.GetMethodsNumber() == 0)
{
return;
}
// no bootstrap constants in pool
BitSet lambda_methods = new BitSet();
// find lambda bootstrap constants
for (int i = 0; i < bootstrap.GetMethodsNumber(); ++i)
{
LinkConstant method_ref = bootstrap.GetMethodReference(i);
// method handle
// FIXME: extend for Eclipse etc. at some point
if (Javac_Lambda_Class.Equals(method_ref.classname) && (Javac_Lambda_Method.Equals
(method_ref.elementname) || Javac_Lambda_Alt_Method.Equals(method_ref.elementname
)))
{
lambda_methods.Set(i);
}
}
if (lambda_methods.IsEmpty())
{
return;
}
// no lambda bootstrap constant found
Dictionary <string, string> mapMethodsLambda = new Dictionary <string, string>();
// iterate over code and find invocations of bootstrap methods. Replace them with anonymous classes.
foreach (StructMethod mt in cl.GetMethods())
{
mt.ExpandData();
InstructionSequence seq = mt.GetInstructionSequence();
if (seq != null && seq.Length() > 0)
{
int len = seq.Length();
for (int i = 0; i < len; ++i)
{
Instruction instr = seq.GetInstr(i);
if (instr.opcode == ICodeConstants.opc_invokedynamic)
{
LinkConstant invoke_dynamic = cl.GetPool().GetLinkConstant(instr.Operand(0));
if (lambda_methods.Get(invoke_dynamic.index1))
{
// lambda invocation found
List <PooledConstant> bootstrap_arguments = bootstrap.GetMethodArguments(invoke_dynamic
.index1);
MethodDescriptor md = MethodDescriptor.ParseDescriptor(invoke_dynamic.descriptor);
string lambda_class_name = md.ret.value;
string lambda_method_name = invoke_dynamic.elementname;
string lambda_method_descriptor = ((PrimitiveConstant)bootstrap_arguments[2]).GetString
();
// method type
LinkConstant content_method_handle = (LinkConstant)bootstrap_arguments[1];
ClassesProcessor.ClassNode node_lambda = new ClassesProcessor.ClassNode(content_method_handle
.classname, content_method_handle.elementname, content_method_handle.descriptor,
content_method_handle.index1, lambda_class_name, lambda_method_name, lambda_method_descriptor
, cl);
node_lambda.simpleName = cl.qualifiedName + "##Lambda_" + invoke_dynamic.index1 +
"_" + invoke_dynamic.index2;
node_lambda.enclosingMethod = InterpreterUtil.MakeUniqueKey(mt.GetName(), mt.GetDescriptor
());
node.nested.Add(node_lambda);
node_lambda.parent = node;
Sharpen.Collections.Put(clProcessor.GetMapRootClasses(), node_lambda.simpleName,
node_lambda);
if (!node_lambda.lambdaInformation.is_method_reference)
{
Sharpen.Collections.Put(mapMethodsLambda, node_lambda.lambdaInformation.content_method_key
, node_lambda.simpleName);
}
}
}
}
}
mt.ReleaseResources();
}
// build class hierarchy on lambda
foreach (ClassesProcessor.ClassNode nd in node.nested)
{
if (nd.type == ClassesProcessor.ClassNode.Class_Lambda)
{
string parent_class_name = mapMethodsLambda.GetOrNull(nd.enclosingMethod);
if (parent_class_name != null)
{
ClassesProcessor.ClassNode parent_class = clProcessor.GetMapRootClasses().GetOrNull
(parent_class_name);
parent_class.nested.Add(nd);
nd.parent = parent_class;
}
}
}
}