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feat: created container types for methods and fields (efficiency and code quality), made temporary fix for anonymous classes

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zaaarf 2023-03-27 12:20:39 +02:00
parent 3cea0d3e66
commit 96c06c797e
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9 changed files with 492 additions and 252 deletions
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94
src/main/java/ftbsc/lll/processor/LilleroProcessor.java
View file

@ -10,6 +10,7 @@ import ftbsc.lll.processor.annotations.Injector;
import ftbsc.lll.processor.annotations.Patch;
import ftbsc.lll.processor.annotations.Target;
import ftbsc.lll.processor.tools.containers.ClassContainer;
import ftbsc.lll.processor.tools.containers.MethodContainer;
import ftbsc.lll.processor.tools.obfuscation.ObfuscationMapper;
import ftbsc.lll.proxies.ProxyType;
import ftbsc.lll.proxies.impl.TypeProxy;
@ -39,7 +40,7 @@ import static ftbsc.lll.processor.tools.JavaPoetUtils.*;
*/
@SupportedAnnotationTypes("ftbsc.lll.processor.annotations.Patch")
@SupportedSourceVersion(SourceVersion.RELEASE_8)
@SupportedOptions({"mappingsFile", "badPracticeWarnings"})
@SupportedOptions({"mappingsFile", "badPracticeWarnings", "anonymousClassWarning"})
public class LilleroProcessor extends AbstractProcessor {
/**
* A {@link Set} of {@link String}s that will contain the fully qualified names
@ -59,6 +60,12 @@ public class LilleroProcessor extends AbstractProcessor {
*/
public static boolean badPracticeWarnings = true;
/**
* Whether the processor should issue warnings when compiling code anonymous
* classes which can't be checked for validity.
*/
public static boolean anonymousClassWarning = true;
/**
* Initializes the processor with the processing environment by
* setting the {@code processingEnv} field to the value of the
@ -98,13 +105,24 @@ public class LilleroProcessor extends AbstractProcessor {
String warns = processingEnv.getOptions().get("badPracticeWarnings");
if(warns == null)
badPracticeWarnings = true;
else {
try { // 0 = false, any other integer = true
int i = Integer.parseInt(warns);
badPracticeWarnings = i != 0;
} catch(NumberFormatException ignored) {
badPracticeWarnings = Boolean.parseBoolean(warns);
else badPracticeWarnings = parseBooleanArg(warns);
String anonymousClassWarn = processingEnv.getOptions().get("anonymousClassWarning");
if(anonymousClassWarn == null)
anonymousClassWarning = true;
else anonymousClassWarning = parseBooleanArg(anonymousClassWarn);
}
/**
* Parses a boolean arg from a String.
* @param arg the arg to parse
* @return the parsed boolean
*/
private static boolean parseBooleanArg(String arg) {
try { // 0 = false, any other integer = true
int i = Integer.parseInt(arg);
return i != 0;
} catch(NumberFormatException ignored) {
return Boolean.parseBoolean(arg);
}
}
@ -174,14 +192,13 @@ public class LilleroProcessor extends AbstractProcessor {
private void generateClasses(TypeElement cl) {
//find class information
Patch patchAnn = cl.getAnnotation(Patch.class);
ClassContainer targetClass = new ClassContainer(
getClassFullyQualifiedName(
ClassContainer targetClass = ClassContainer.from(
patchAnn,
Patch::value,
patchAnn.className()
), this.processingEnv, this.mapper
patchAnn.className(),
this.processingEnv,
this.mapper
);
//find package information
Element packageElement = cl.getEnclosingElement();
while (packageElement.getKind() != ElementKind.PACKAGE)
@ -209,17 +226,17 @@ public class LilleroProcessor extends AbstractProcessor {
//case-specific handling
if(type == ProxyType.TYPE) {
//find and validate
ClassContainer clazz = findClassOrFallback(targetClass, proxyVar.getAnnotation(Find.class), this.processingEnv, this.mapper);
ClassContainer clazz = ClassContainer.findOrFallback(targetClass, proxyVar.getAnnotation(Find.class), this.processingEnv, this.mapper);
//types can be generated with a single instruction
constructorBuilder.addStatement(
"super.$L = $T.from($S, 0, $L)",
proxyVar.getSimpleName().toString(),
TypeProxy.class,
clazz.fqnObf, //use obf name, at runtime it will be obfuscated
mapModifiers(clazz.elem.getModifiers())
clazz.elem == null ? 0 : mapModifiers(clazz.elem.getModifiers())
);
} else if(type == ProxyType.FIELD || type == ProxyType.METHOD)
appendMemberFinderDefinition(targetClass, proxyVar, null, constructorBuilder, this.processingEnv, this.mapper);
appendMemberFinderDefinition(targetClass, proxyVar, null, null, constructorBuilder, this.processingEnv, this.mapper);
}
//this will contain the classes to generate: the key is the class name
@ -236,8 +253,7 @@ public class LilleroProcessor extends AbstractProcessor {
List<ExecutableElement> injectorCandidates = injectors;
List<VariableElement> finderCandidates = methodFinders;
if(!targetAnn.of().equals("")) {
//case 1: find target by name
//find target by name
injectorCandidates =
injectorCandidates
.stream()
@ -248,24 +264,6 @@ public class LilleroProcessor extends AbstractProcessor {
.stream()
.filter(i -> i.getSimpleName().contentEquals(targetAnn.of()))
.collect(Collectors.toList());
} else if(injectors.size() == 1 && targets.size() == 1) {
//case 2: there is only one target, must use it for that injector
finderCandidates = new ArrayList<>(); //no candidates
injectorCandidates = new ArrayList<>();
injectorCandidates.add(injectors.get(0));
} else {
//case 3: try to match by injectTargetName or same name for finders
injectorCandidates =
injectorCandidates
.stream()
.filter(t -> t.getSimpleName().toString().equalsIgnoreCase("inject" + tg.getSimpleName()))
.collect(Collectors.toList());
finderCandidates =
finderCandidates
.stream()
.filter(t -> t.getSimpleName().contentEquals(tg.getSimpleName()))
.collect(Collectors.toList());
}
//throw exception if user is a moron and defined a finder and an injector with the same name
if(finderCandidates.size() != 0 && injectorCandidates.size() != 0)
@ -274,7 +272,13 @@ public class LilleroProcessor extends AbstractProcessor {
);
else if(finderCandidates.size() == 0 && injectorCandidates.size() == 0)
processingEnv.getMessager().printMessage(Diagnostic.Kind.WARNING,
String.format("Found orphan @Target annotation on method %s, it will be ignored!", tg.getSimpleName().toString()));
String.format(
"Found orphan @Target annotation on method %s.%s pointing at method %s, it will be ignored!",
cl.getSimpleName().toString(),
tg.getSimpleName().toString(),
targetAnn.of()
)
);
else if(finderCandidates.size() == 0 && injectorCandidates.size() != 1)
throw new AmbiguousDefinitionException(
String.format("Found multiple candidate injectors for target %s::%s!", cl.getSimpleName(), tg.getSimpleName())
@ -290,7 +294,7 @@ public class LilleroProcessor extends AbstractProcessor {
matchedInjectors.add(injector);
toGenerate.put(
String.format("%sInjector%d", cl.getSimpleName(), iterationNumber),
new InjectorInfo(injector, tg)
new InjectorInfo(injector, tg, targetAnn)
);
iterationNumber++; //increment is only used by injectors
} else {
@ -301,6 +305,7 @@ public class LilleroProcessor extends AbstractProcessor {
targetClass,
finder,
tg,
targetAnn,
constructorBuilder,
this.processingEnv,
this.mapper
@ -320,8 +325,6 @@ public class LilleroProcessor extends AbstractProcessor {
//iterate over the map and generate the classes
for(String injName : toGenerate.keySet()) {
String targetMethodDescriptor = descriptorFromExecutableElement(toGenerate.get(injName).target);
String targetMethodName = findMemberName(targetClass.fqnObf, toGenerate.get(injName).target.getSimpleName().toString(), targetMethodDescriptor, this.mapper);
MethodSpec inject = MethodSpec.methodBuilder("inject")
.addModifiers(Modifier.PUBLIC)
.returns(void.class)
@ -345,8 +348,8 @@ public class LilleroProcessor extends AbstractProcessor {
.addMethod(buildStringReturnMethod("name", cl.getSimpleName().toString()))
.addMethod(buildStringReturnMethod("reason", toGenerate.get(injName).reason))
.addMethod(buildStringReturnMethod("targetClass", targetClass.fqn))
.addMethod(buildStringReturnMethod("methodName", targetMethodName))
.addMethod(buildStringReturnMethod("methodDesc", targetMethodDescriptor))
.addMethod(buildStringReturnMethod("methodName", toGenerate.get(injName).target.name))
.addMethod(buildStringReturnMethod("methodDesc", toGenerate.get(injName).target.descriptor))
.addMethods(generateDummies(targets))
.addMethod(inject)
.build();
@ -405,20 +408,21 @@ public class LilleroProcessor extends AbstractProcessor {
public final String reason;
/**
* The {@link ExecutableElement} corresponding to the target method.
* The {@link MethodContainer} corresponding to the target method.
*/
private final ExecutableElement target;
private final MethodContainer target;
/**
* Public constructor.
* @param injector the injector {@link ExecutableElement}
* @param targetStub the target {@link ExecutableElement}
* @param targetAnn the relevant {@link Target} annotation
*/
public InjectorInfo(ExecutableElement injector, ExecutableElement targetStub) {
public InjectorInfo(ExecutableElement injector, ExecutableElement targetStub, Target targetAnn) {
this.injector = injector;
this.targetStub = targetStub;
this.reason = injector.getAnnotation(Injector.class).reason();
this.target = findMethodFromStub(targetStub, null, processingEnv);
this.target = MethodContainer.from(targetStub, targetAnn, null, processingEnv, mapper);
}
}
}

26
src/main/java/ftbsc/lll/processor/annotations/Find.java
View file

@ -26,10 +26,10 @@ public @interface Find {
Class<?> value() default Object.class;
/**
* For a {@link TypeProxy}, this can be either the fully-qualified name
* to be used in place of {@link #value()} or an inner class name to append
* after a $ symbol to the already acquired fully-qualified name.
* For others, this is refers to the parent class.
* This can be either the fully-qualified name to be used in place of {@link #value()} to
* represent the parent class or an inner class name to append after a $ symbol to the
* already acquired fully-qualified name.
* For a {@link TypeProxy}, this refers to the class itself rather than the parent.
* @return the name of the inner class that contains the target,
* defaults to empty string (not an inner class)
* @since 0.5.0
@ -50,4 +50,22 @@ public @interface Find {
* @since 0.5.0
*/
String name() default "";
/**
* This overrules the type of a field. Only to be used in the case (such as fields of
* anonymous classes) of fields whose parents cannot be reached at processing time.
* @return a {@link Class} representing the type.
* @deprecated This is only meant as a temporary solution until a better handling
* is implemented; only use this if strictly necessary as it may be
* removed or changed even across revisions.
*/
@Deprecated
Class<?> type() default Object.class;
/**
* @return the inner class name to be used with {@link #type()}
* @deprecated See {@link #type()}'s deprecation notice for more info.
*/
@Deprecated
String typeInner() default "";
}

9
src/main/java/ftbsc/lll/processor/annotations/Target.java
View file

@ -25,7 +25,14 @@ public @interface Target {
* @return the name of the element this is supposed to apply to
* @since 0.5.0
*/
String of() default "";
String of();
/**
* @return a name which overrides the name of the annotated one, may be used in
* cases such as constructors
* @since 0.5.0
*/
String methodName() default "";
/**
* When set to false, tells the processor to first try to match a single method by name,

151
src/main/java/ftbsc/lll/processor/tools/ASTUtils.java
View file

@ -4,16 +4,18 @@ import ftbsc.lll.exceptions.AmbiguousDefinitionException;
import ftbsc.lll.exceptions.MappingNotFoundException;
import ftbsc.lll.exceptions.NotAProxyException;
import ftbsc.lll.exceptions.TargetNotFoundException;
import ftbsc.lll.processor.annotations.Find;
import ftbsc.lll.processor.annotations.Patch;
import ftbsc.lll.processor.annotations.Target;
import ftbsc.lll.processor.tools.containers.ClassContainer;
import ftbsc.lll.processor.tools.obfuscation.ObfuscationMapper;
import ftbsc.lll.proxies.ProxyType;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.*;
import javax.lang.model.element.Element;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.MirroredTypeException;
import javax.lang.model.type.TypeMirror;
import java.lang.annotation.Annotation;
import java.util.Collection;
import java.util.List;
@ -21,6 +23,7 @@ import java.util.function.Function;
import java.util.stream.Collectors;
import static ftbsc.lll.processor.tools.JavaPoetUtils.descriptorFromExecutableElement;
import static ftbsc.lll.processor.tools.JavaPoetUtils.descriptorFromType;
/**
* Collection of AST-related static utils that didn't really fit into the main class.
@ -96,26 +99,22 @@ public class ASTUtils {
}
/**
* Safely extracts a {@link Class} from an annotation and gets its fully qualified name.
* Safely extracts a {@link Class} from an annotation and gets a {@link TypeMirror} representing it.
* @param ann the annotation containing the class
* @param parentFunction the annotation function returning the class
* @param name a string containing the FQN, the inner class name or nothing
* @param classFunction the annotation function returning the class
* @param env the {@link ProcessingEnvironment} to perform the operation in
* @param <T> the type of the annotation carrying the information
* @return the fully qualified name of the given class
* @return a {@link TypeMirror} representing the requested {@link Class}
* @since 0.3.0
*/
public static <T extends Annotation> String getClassFullyQualifiedName(T ann, Function<T, Class<?>> parentFunction, String name) {
if(name.contains("."))
return name;
String fqn;
public static <T extends Annotation> TypeMirror getTypeFromAnnotation(
T ann, Function<T, Class<?>> classFunction, ProcessingEnvironment env) {
try {
fqn = parentFunction.apply(ann).getCanonicalName();
String fqn = classFunction.apply(ann).getCanonicalName();
return env.getElementUtils().getTypeElement(fqn).asType();
} catch(MirroredTypeException e) {
fqn = e.getTypeMirror().toString();
return e.getTypeMirror();
}
if(!name.equals(""))
fqn = String.format("%s$%s", fqn, name);
return fqn;
}
/**
@ -133,48 +132,11 @@ public class ASTUtils {
}
}
/**
* Finds the class name and maps it to the correct format.
* @param fallback the (unobfuscated) FQN to fall back on
* @param finderAnn an annotation containing metadata about the target, may be null
* @return the fully qualified class name
* @since 0.5.0
*/
public static String findClassNameFromAnnotations(String fallback, Find finderAnn) {
if(finderAnn != null) {
String fullyQualifiedName =
getClassFullyQualifiedName(
finderAnn,
Find::value,
finderAnn.className()
);
if(!fullyQualifiedName.equals("java.lang.Object"))
return findClassName(fullyQualifiedName, null);
}
return findClassName(fallback, null);
}
/**
* Finds the class name and maps it to the correct format.
* @param patchAnn the {@link Patch} annotation containing target class info
* @param finderAnn an annotation containing metadata about the target, may be null
* @return the fully qualified class name
* @since 0.3.0
*/
public static String findClassNameFromAnnotations(Patch patchAnn, Find finderAnn) {
return findClassNameFromAnnotations(
getClassFullyQualifiedName(
patchAnn,
Patch::value,
patchAnn.className()
), finderAnn);
}
/**
* Finds the member name and maps it to the correct format.
* @param parentFQN the already mapped FQN of the parent class
* @param memberName the name of the member
* @param methodDescriptor the descriptor of the method, may be null if it's not a method
* @param methodDescriptor the descriptor of the method, may be null
* @param mapper the {@link ObfuscationMapper} to use, may be null
* @return the internal class name
* @since 0.3.0
@ -189,37 +151,42 @@ public class ASTUtils {
/**
* Finds a member given the name, the container class and (if it's a method) the descriptor.
* @param parentFQN the fully qualified name of the parent class
* @param parent the {@link ClassContainer} representing the parent
* @param name the name to search for
* @param descr the descriptor to search for, or null if it's not a method
* @param strict whether the search should be strict (see {@link Target#strict()} for more info),
* only applies to method searches
* @param strict whether to perform lookup in strict mode (see {@link Target#strict()} for more information)
* @param field whether the member being searched is a field
* @param env the {@link ProcessingEnvironment} to perform the operation in
* @return the desired member, if it exists
* @throws AmbiguousDefinitionException if it finds more than one candidate
* @throws TargetNotFoundException if it finds no valid candidate
* @since 0.3.0
*/
public static Element findMember(String parentFQN, String name, String descr, boolean strict, boolean field, ProcessingEnvironment env) {
TypeElement parent = env.getElementUtils().getTypeElement(parentFQN);
if(parent == null)
throw new AmbiguousDefinitionException(String.format("Could not find parent class %s for member %s!", parentFQN, descr == null ? name : name + descr));
public static Element findMember(ClassContainer parent, String name, String descr, boolean strict, boolean field) {
if(parent.elem == null)
throw new TargetNotFoundException("parent class", parent.fqn);
//try to find by name
List<Element> candidates = parent.getEnclosedElements()
List<Element> candidates = parent.elem.getEnclosedElements()
.stream()
.filter(e -> (field && e instanceof VariableElement) || e instanceof ExecutableElement)
.filter(e -> e.getSimpleName().contentEquals(name))
.collect(Collectors.toList());
if(candidates.size() == 0)
throw new TargetNotFoundException(field ? "field" : "method", name, parentFQN);
if(candidates.size() == 1 && (!strict || field))
throw new TargetNotFoundException(field ? "field" : "method", name, parent.fqn);
if(candidates.size() == 1 && (!strict || descr == null))
return candidates.get(0);
if(field || descr == null) {
if(descr == null) {
throw new AmbiguousDefinitionException(
String.format("Found %d members named %s in class %s!", candidates.size(), name, parentFQN)
String.format("Found %d members named %s in class %s!", candidates.size(), name, parent.fqn)
);
} else {
if(field) {
//fields can verify the signature for extra safety
//but there can only be 1 field with a given name
if(!descriptorFromType(candidates.get(0).asType()).equals(descr))
throw new TargetNotFoundException("field", String.format("%s with descriptor %s", name, descr), parent.fqn);
} else {
candidates = candidates.stream()
.map(e -> (ExecutableElement) e)
@ -227,44 +194,17 @@ public class ASTUtils {
? c -> descr.equals(descriptorFromExecutableElement(c))
: c -> descr.split("\\)")[0].equalsIgnoreCase(descriptorFromExecutableElement(c).split("\\)")[0])
).collect(Collectors.toList());
}
if(candidates.size() == 0)
throw new TargetNotFoundException("method", String.format("%s %s", name, descr), parentFQN);
throw new TargetNotFoundException("method", String.format("%s %s", name, descr), parent.fqn);
if(candidates.size() > 1)
throw new AmbiguousDefinitionException(
String.format("Found %d methods named %s in class %s!", candidates.size(), name, parentFQN)
String.format("Found %d methods named %s in class %s!", candidates.size(), name, parent.fqn)
);
return candidates.get(0);
}
}
/**
* Finds the real class method corresponding to a stub annotated with {@link Target}.
* @param stub the {@link ExecutableElement} for the stub
* @param f the {@link Find} annotation containing fallback data, may be null
* @param env the {@link ProcessingEnvironment} to perform the operation in
* @return the {@link ExecutableElement} corresponding to the method
* @throws AmbiguousDefinitionException if it finds more than one candidate
* @throws TargetNotFoundException if it finds no valid candidate
* @since 0.3.0
*/
public static ExecutableElement findMethodFromStub(ExecutableElement stub, Find f, ProcessingEnvironment env) {
//the parent always has a @Patch annotation
Patch patchAnn = stub.getEnclosingElement().getAnnotation(Patch.class);
//there should ever only be one of these two
Target targetAnn = stub.getAnnotation(Target.class); //if this is null strict mode is always disabled
String parentFQN = findClassNameFromAnnotations(patchAnn, f);
String methodName = stub.getSimpleName().toString();
String methodDescriptor = descriptorFromExecutableElement(stub);
return (ExecutableElement) findMember(
parentFQN,
methodName,
methodDescriptor,
targetAnn != null && targetAnn.strict(),
false, //only evaluate if target is null
env
);
}
/**
* Utility method for finding out what type of proxy a field is.
* It will fail if the return type is not a known type of proxy.
@ -288,21 +228,4 @@ public class ASTUtils {
throw new NotAProxyException(v.getEnclosingElement().getSimpleName().toString(), v.getSimpleName().toString());
}
}
/**
* Finds and builds a {@link ClassContainer} based on information contained
* within a {@link Find} annotation, else returns a fallback.
* @param fallback the {@link ClassContainer} it falls back on
* @param f the {@link Find} annotation to get info from
* @param env the {@link ProcessingEnvironment} to perform the operation in
* @param mapper the {@link ObfuscationMapper} to use, may be null
* @return the built {@link ClassContainer} or the fallback if not enough information was present
* @since 0.5.0
*/
public static ClassContainer findClassOrFallback(ClassContainer fallback, Find f, ProcessingEnvironment env, ObfuscationMapper mapper) {
String fqn = getClassFullyQualifiedName(f, Find::value, f.className());
return fqn.equals("java.lang.Object")
? fallback
: new ClassContainer(fqn, env, mapper);
}
}

90
src/main/java/ftbsc/lll/processor/tools/JavaPoetUtils.java
View file

@ -1,10 +1,11 @@
package ftbsc.lll.processor.tools;
import com.squareup.javapoet.*;
import ftbsc.lll.processor.LilleroProcessor;
import ftbsc.lll.processor.annotations.Find;
import ftbsc.lll.processor.tools.containers.ArrayContainer;
import ftbsc.lll.processor.annotations.Target;
import ftbsc.lll.processor.tools.containers.ClassContainer;
import ftbsc.lll.processor.tools.containers.FieldContainer;
import ftbsc.lll.processor.tools.containers.MethodContainer;
import ftbsc.lll.processor.tools.obfuscation.ObfuscationMapper;
import ftbsc.lll.proxies.ProxyType;
import ftbsc.lll.proxies.impl.FieldProxy;
@ -16,13 +17,12 @@ import javax.lang.model.element.Element;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.TypeKind;
import javax.lang.model.type.TypeMirror;
import javax.tools.Diagnostic;
import java.util.Collection;
import java.util.HashSet;
import static ftbsc.lll.processor.tools.ASTUtils.*;
import static ftbsc.lll.processor.tools.ASTUtils.getProxyType;
import static ftbsc.lll.processor.tools.ASTUtils.mapModifiers;
/**
* Collection of static utils that rely on JavaPoet to function.
@ -104,76 +104,45 @@ public class JavaPoetUtils {
return methodSignature.toString();
}
/**
* Adds to the given {@link MethodSpec.Builder} the given line of code,
* containing a call to a method of a {@link MethodProxy.Builder} or a
* {@link FieldProxy.Builder}.
* @param b the {@link MethodSpec.Builder}
* @param proxyBuilderName the name of the proxy builder
* @param proxyBuilderMethod the method to call
* @param t the {@link TypeMirror} to add
* @since 0.4.0
*/
public static void addTypeToProxyGenerator(MethodSpec.Builder b, String proxyBuilderName, String proxyBuilderMethod, TypeMirror t) {
String insn = String.format("%s.%s", proxyBuilderName, proxyBuilderMethod);
if(t.getKind().isPrimitive() || t.getKind() == TypeKind.VOID)
b.addStatement(insn + "($T.class)", t);
else {
ArrayContainer arr = new ArrayContainer(t);
TypeName type = TypeName.get(arr.innermostComponent);
if(type instanceof ParameterizedTypeName)
type = ((ParameterizedTypeName) type).rawType;
b.addStatement(
insn + "($S, $L)",
type.toString(),
arr.arrayLevel
);
}
}
/**
* Appends to a given {@link MethodSpec.Builder} definitions for a proxy.
* @param fallback the {@link ClassContainer} to fall back on
* @param var the {@link VariableElement} representing the proxy
* @param stub the stub {@link ExecutableElement} if present or relevant, null otherwise
* @param t the {@link Target} relevant to this finder if present or relevant, null otherwise
* @param con the {@link MethodSpec.Builder} to append to
* @param env the {@link ProcessingEnvironment} to perform the operation in
* @param mapper the {@link ObfuscationMapper} to use, may be null
* @since 0.5.0
*/
public static void appendMemberFinderDefinition(
ClassContainer fallback, VariableElement var, ExecutableElement stub, MethodSpec.Builder con, ProcessingEnvironment env, ObfuscationMapper mapper) {
ClassContainer fallback, VariableElement var, ExecutableElement stub, Target t,
MethodSpec.Builder con, ProcessingEnvironment env, ObfuscationMapper mapper) {
ProxyType type = getProxyType(var);
if(type != ProxyType.METHOD && type != ProxyType.FIELD)
return; //this method is irrelevant to everyoen else
return; //this method is irrelevant to everyone else
//we need this stuff
Find f = var.getAnnotation(Find.class);
ClassContainer parent = findClassOrFallback(fallback, f, env, mapper);
final boolean isMethod = type == ProxyType.METHOD;
final String builderName = var.getSimpleName().toString() + "Builder";
String name, nameObf;
String descriptor, nameObf;
ClassContainer parent;
Element target;
if(isMethod) {
ExecutableElement executableTarget;
if(f.name().equals("")) //find and validate from stub
executableTarget = findMethodFromStub(stub, f, env);
else { //find and validate by name alone
if(LilleroProcessor.badPracticeWarnings) //warn user that he is doing bad stuff
env.getMessager().printMessage(Diagnostic.Kind.WARNING,
String.format("Matching method %s by name, this is bad practice and may lead to unexpected behaviour. Use @Target stubs instead!", f.name()));
executableTarget = (ExecutableElement) findMember(parent.fqn, f.name(), null, false, false, env);
}
name = executableTarget.getSimpleName().toString();
nameObf = findMemberName(parent.fqnObf, name, descriptorFromExecutableElement(executableTarget), mapper);
target = executableTarget;
MethodContainer mc = MethodContainer.from(stub, t, f, env, mapper);
descriptor = mc.descriptor;
nameObf = mc.nameObf;
parent = mc.parent;
target = mc.elem;
} else {
//find and validate target
name = f.name().equals("") ? var.getSimpleName().toString() : f.name();
target = findMember(parent.fqn, name, null, false, true, env);
nameObf = findMemberName(parent.fqnObf, name, null, mapper);
FieldContainer fc = FieldContainer.from(var, env, mapper);
descriptor = fc.descriptor;
nameObf = fc.nameObf;
parent = fc.parent;
target = fc.elem;
}
//initialize builder
@ -189,23 +158,22 @@ public class JavaPoetUtils {
"$L.setParent($S, $L)",
builderName,
parent.fqnObf,
mapModifiers(parent.elem.getModifiers())
parent.elem == null ? 0 : mapModifiers(parent.elem.getModifiers())
);
//set modifiers
con.addStatement(
"$L.setModifiers($L)",
builderName,
mapModifiers(target.getModifiers())
target == null ? 0 :mapModifiers(target.getModifiers())
);
if(isMethod) { //set parameters and return type
ExecutableElement executableTarget = (ExecutableElement) target;
for(VariableElement p : executableTarget.getParameters())
addTypeToProxyGenerator(con, builderName, "addParameter", p.asType());
addTypeToProxyGenerator(con, builderName, "setReturnType", executableTarget.getReturnType());
} else //set type
addTypeToProxyGenerator(con,builderName, "setType", target.asType());
//set type(s)
con.addStatement(
"$L.setDescriptor($S)",
builderName,
descriptor
);
//build and set
con.addStatement(

97
src/main/java/ftbsc/lll/processor/tools/containers/ClassContainer.java
View file

@ -1,12 +1,20 @@
package ftbsc.lll.processor.tools.containers;
import ftbsc.lll.exceptions.TargetNotFoundException;
import ftbsc.lll.processor.LilleroProcessor;
import ftbsc.lll.processor.annotations.Find;
import ftbsc.lll.processor.tools.obfuscation.ObfuscationMapper;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic;
import java.lang.annotation.Annotation;
import java.util.Arrays;
import java.util.function.Function;
import static ftbsc.lll.processor.tools.ASTUtils.findClassName;
import static ftbsc.lll.processor.tools.ASTUtils.getTypeFromAnnotation;
/**
* Container for information about a class.
@ -27,21 +35,100 @@ public class ClassContainer {
/**
* The {@link Element} corresponding to the class.
* May only be null intentionally i.e. when the associated element is
* an anonymous class or a child of an anonymous class.
*/
public final Element elem;
/**
* Public constructor.
* @param fqn the fully-qualified name of the target class
* @param innerNames an array of Strings containing the path to the inner class, may be null
* @param env the {@link ProcessingEnvironment} to be used to locate the class
* @param mapper the {@link ObfuscationMapper} to be used, may be null
*/
public ClassContainer(String fqn, ProcessingEnvironment env, ObfuscationMapper mapper) {
this.fqn = fqn;
this.fqnObf = findClassName(fqn, mapper);
Element elem = env.getElementUtils().getTypeElement(fqn); //at compile time we have an unobfuscated environment
public ClassContainer(String fqn, String[] innerNames, ProcessingEnvironment env, ObfuscationMapper mapper) {
//find and validate
Element elem = env.getElementUtils().getTypeElement(fqn); //use unobfuscated name
if(elem == null)
throw new TargetNotFoundException("class", fqn);
else this.elem = elem;
if(innerNames != null) {
for(String inner : innerNames) {
try {
int anonClassCounter = Integer.parseInt(inner);
//anonymous classes cannot be validated!
if(LilleroProcessor.anonymousClassWarning)
env.getMessager().printMessage(
Diagnostic.Kind.WARNING,
String.format(
"Anonymous classes cannot be verified by the processor. The existence of %s$%s is not guaranteed!",
fqn, anonClassCounter
)
);
elem = null;
break;
} catch(NumberFormatException exc) {
elem = elem
.getEnclosedElements()
.stream()
.filter(e -> e instanceof TypeElement)
.filter(e -> e.getSimpleName().contentEquals(inner))
.findFirst()
.orElse(null);
}
if(elem == null)
throw new TargetNotFoundException("class", inner);
}
}
this.fqn = fqn;
this.fqnObf = findClassName(fqn, mapper);
this.elem = elem;
}
/**
* Safely extracts a {@link Class} from an annotation and gets its fully qualified name.
* @param ann the annotation containing the class
* @param classFunction the annotation function returning the class
* @param className a string containing the FQN, the inner class name or nothing
* @param env the {@link ProcessingEnvironment} to be used to locate the class
* @param mapper the {@link ObfuscationMapper} to be used, may be null
* @param <T> the type of the annotation carrying the information
* @return the fully qualified name of the given class
* @since 0.5.0
*/
public static <T extends Annotation> ClassContainer from(
T ann, Function<T, Class<?>> classFunction, String className,
ProcessingEnvironment env, ObfuscationMapper mapper)
{
String fqn;
String[] inner;
if(className.contains(".")) {
String[] split = className.split("//$");
fqn = split[0];
inner = split.length == 1 ? null : Arrays.copyOfRange(split, 1, split.length - 1);
} else {
fqn = getTypeFromAnnotation(ann, classFunction, env).toString();
inner = className.equals("") ? null : className.split("//$");
}
return new ClassContainer(fqn, inner, env, mapper);
}
/**
* Finds and builds a {@link ClassContainer} based on information contained
* within a {@link Find} annotation, else returns a fallback.
* @param fallback the {@link ClassContainer} it falls back on
* @param f the {@link Find} annotation to get info from
* @param env the {@link ProcessingEnvironment} to perform the operation in
* @param mapper the {@link ObfuscationMapper} to use, may be null
* @return the built {@link ClassContainer} or the fallback if not enough information was present
* @since 0.5.0
*/
public static ClassContainer findOrFallback(ClassContainer fallback, Find f, ProcessingEnvironment env, ObfuscationMapper mapper) {
ClassContainer cl = ClassContainer.from(f, Find::value, f.className(), env, mapper);
return cl.fqn.equals("java.lang.Object")
? fallback
: cl;
}
}

110
src/main/java/ftbsc/lll/processor/tools/containers/FieldContainer.java Normal file
View file

@ -0,0 +1,110 @@
package ftbsc.lll.processor.tools.containers;
import ftbsc.lll.exceptions.AmbiguousDefinitionException;
import ftbsc.lll.processor.annotations.Find;
import ftbsc.lll.processor.annotations.Patch;
import ftbsc.lll.processor.tools.obfuscation.ObfuscationMapper;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.TypeKind;
import javax.lang.model.type.TypeMirror;
import static ftbsc.lll.processor.tools.ASTUtils.*;
import static ftbsc.lll.processor.tools.JavaPoetUtils.descriptorFromType;
/**
* Container for information about a field.
* Used internally for efficiency reasons.
* @since 0.5.0
*/
public class FieldContainer {
/**
* The name of the field.
*/
public final String name;
/**
* The descriptor of the field.
*/
public final String descriptor;
/**
* The obfuscated name of the field.
* If the mapper passed is null, then this will be identical to {@link #name}.
*/
public final String nameObf;
/**
* The {@link ClassContainer} representing the parent of this field.
* May be null if the parent is a class type that can not be checked
* at processing time (such as an anonymous class)
*/
public final ClassContainer parent;
/**
* The {@link VariableElement} corresponding to the field.
* May only be null intentionally i.e. when the field is
* a child of an anonymous class.
*/
public final VariableElement elem;
/**
* Public constructor.
* @param parent the {@link ClassContainer} representing the parent
* @param name the fully-qualified name of the target field
* @param descriptor the descriptor of the target field, may be null for verifiable fields
* @param mapper the {@link ObfuscationMapper} to be used, may be null
*/
public FieldContainer(ClassContainer parent, String name, String descriptor, ObfuscationMapper mapper) {
this.parent = parent;
if(parent.elem == null) { //unverified
if(descriptor == null)
throw new AmbiguousDefinitionException("Cannot use name-based lookups for fields of unverifiable classes!");
this.elem = null;
this.name = name;
this.descriptor = descriptor;
} else {
this.elem = (VariableElement) findMember(parent, name, descriptor, descriptor != null, true);
this.name = this.elem.getSimpleName().toString();
this.descriptor = descriptorFromType(this.elem.asType());
}
this.nameObf = findMemberName(parent.fqnObf, name, descriptor, mapper);
}
/**
* Finds a {@link FieldContainer} from a finder.
* @param finder the {@link VariableElement} annotated with {@link Find} for this field
* @param env the {@link ProcessingEnvironment} to perform the operation in
* @param mapper the {@link ObfuscationMapper} to be used, may be null
* @return the built {@link FieldContainer}
* @since 0.5.0
*/
public static FieldContainer from(VariableElement finder, ProcessingEnvironment env, ObfuscationMapper mapper) {
//the parent always has a @Patch annotation
Patch patchAnn = finder.getEnclosingElement().getAnnotation(Patch.class);
//the finder always has a @Find annotation
Find f = finder.getAnnotation(Find.class);
ClassContainer parent = ClassContainer.findOrFallback(
ClassContainer.from(patchAnn, Patch::value, patchAnn.className(), env, null),
f, env, mapper
);
String name = f.name().equals("") ? finder.getSimpleName().toString() : f.name();
String descriptor;
TypeMirror fieldType = getTypeFromAnnotation(f, Find::type, env);
if(fieldType.toString().equals("java.lang.Object"))
descriptor = null;
else {
if(fieldType.getKind() == TypeKind.DECLARED)
descriptor = //jank af but this is temporary anyway
"L" + new ClassContainer(
fieldType.toString(), f.typeInner().split("//$"), env, mapper
).fqn.replace('.', '/') + ";";
else descriptor = descriptorFromType(fieldType);
}
return new FieldContainer(parent, name, descriptor, mapper);
}
}

115
src/main/java/ftbsc/lll/processor/tools/containers/MethodContainer.java Normal file
View file

@ -0,0 +1,115 @@
package ftbsc.lll.processor.tools.containers;
import ftbsc.lll.exceptions.AmbiguousDefinitionException;
import ftbsc.lll.exceptions.TargetNotFoundException;
import ftbsc.lll.processor.LilleroProcessor;
import ftbsc.lll.processor.annotations.Find;
import ftbsc.lll.processor.annotations.Patch;
import ftbsc.lll.processor.annotations.Target;
import ftbsc.lll.processor.tools.obfuscation.ObfuscationMapper;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.ExecutableElement;
import javax.tools.Diagnostic;
import static ftbsc.lll.processor.tools.ASTUtils.findMember;
import static ftbsc.lll.processor.tools.ASTUtils.findMemberName;
import static ftbsc.lll.processor.tools.JavaPoetUtils.descriptorFromExecutableElement;
/**
* Container for information about a method.
* Used internally for efficiency reasons.
* @since 0.5.0
*/
public class MethodContainer {
/**
* The name of the method.
*/
public final String name;
/**
* The descriptor of the method.
*/
public final String descriptor;
/**
* The obfuscated name of the method.
* If the mapper passed is null, then this will be identical to {@link #name}.
*/
public final String nameObf;
/**
* The {@link ClassContainer} representing the parent of this method.
* May be null if the parent is a class type that can not be checked
* at processing time (such as an anonymous class)
*/
public final ClassContainer parent;
/**
* The {@link ExecutableElement} corresponding to the method.
* May only be null intentionally i.e. when the method is
* a child of an anonymous class.
*/
public final ExecutableElement elem;
/**
* Public constructor.
* @param parent the {@link ClassContainer} representing the parent
* @param name the fully-qualified name of the target method
* @param descriptor the descriptor of the target method
* @param strict whether the matching should be strict (see {@link Target#strict()} for more info).
* @param mapper the {@link ObfuscationMapper} to be used, may be null
*/
public MethodContainer(ClassContainer parent, String name, String descriptor, boolean strict, ObfuscationMapper mapper) {
this.parent = parent;
if(parent.elem == null) { //unverified
if(descriptor == null)
throw new AmbiguousDefinitionException("Cannot use name-based lookups for methods of unverifiable classes!");
this.elem = null;
this.name = name;
this.descriptor = descriptor;
} else {
this.elem = (ExecutableElement) findMember(parent, name, descriptor, descriptor != null && strict, false);
this.name = this.elem.getSimpleName().toString();
this.descriptor = descriptorFromExecutableElement(this.elem);
}
this.nameObf = findMemberName(parent.fqnObf, name, descriptor, mapper);
}
/**
* Builds the {@link MethodContainer} corresponding to a stub annotated with {@link Target}.
* @param stub the {@link ExecutableElement} for the stub
* @param t the {@link Target} annotation relevant to this case
* @param f the {@link Find} annotation containing fallback data, may be null
* @param env the {@link ProcessingEnvironment} to perform the operation in
* @param mapper the {@link ObfuscationMapper} to be used, may be null
* @return the {@link MethodContainer} corresponding to the method
* @throws AmbiguousDefinitionException if it finds more than one candidate
* @throws TargetNotFoundException if it finds no valid candidate
* @since 0.3.0
*/
public static MethodContainer from(ExecutableElement stub, Target t, Find f, ProcessingEnvironment env, ObfuscationMapper mapper) {
//the parent always has a @Patch annotation
Patch patchAnn = stub.getEnclosingElement().getAnnotation(Patch.class);
ClassContainer parent = ClassContainer.findOrFallback(
ClassContainer.from(patchAnn, Patch::value, patchAnn.className(), env, null),
f, env, mapper
);
String name, descriptor;
if(f != null && !f.name().equals("")) { //match by name alone
if(LilleroProcessor.badPracticeWarnings) //warn user that he is doing bad stuff
env.getMessager().printMessage(Diagnostic.Kind.WARNING,
String.format("Matching method %s by name, this is bad practice and may lead to unexpected behaviour. Use @Target stubs instead!", f.name()));
name = f.name();
descriptor = null;
} else {
if(t != null && !t.methodName().equals(""))
name = t.methodName(); //name was specified in target
else name = stub.getSimpleName().toString();
descriptor = t != null && t.strict() ? descriptorFromExecutableElement(stub) : null;
}
return new MethodContainer(parent, name, descriptor, t != null && t.strict(), mapper);
}
}

14
src/main/java/ftbsc/lll/processor/tools/obfuscation/ObfuscationMapper.java
View file

@ -180,8 +180,16 @@ public class ObfuscationMapper {
* @throws AmbiguousDefinitionException if not enough data was given to uniquely identify a mapping
*/
public String get(String memberName, String methodDescriptor) {
if(methodDescriptor == null)
return members.get(memberName);
if(methodDescriptor == null) {
String res = members.get(memberName);
if(res != null) return res;
else {
List<String> candidates = members.keySet().stream().filter(k -> k.startsWith(memberName)).collect(Collectors.toList());
if(candidates.size() == 1)
return candidates.get(0);
else throw new AmbiguousDefinitionException("Mapper could not uniquely identify method " + this.unobf + "::" + memberName);
}
}
List<String> candidates = members.keySet().stream().filter(m -> m.startsWith(memberName)).collect(Collectors.toList());
if(candidates.size() == 1)
return members.get(candidates.get(0));
@ -193,7 +201,7 @@ public class ObfuscationMapper {
case 1:
return members.get(candidates.get(0));
default:
throw new AmbiguousDefinitionException("Mapper could not uniquely identify method " + unobf + "::" + memberName);
throw new AmbiguousDefinitionException("Mapper could not uniquely identify method " + this.unobf + "::" + memberName);
}
}
}