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feat: major code refactor, potential fix for several logical bugs in FindMethod and FindField

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zaaarf 2023-03-16 15:26:46 +01:00
parent f85c868e10
commit dca13711d5
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1 changed files with 78 additions and 106 deletions
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158
src/main/java/ftbsc/lll/processor/LilleroProcessor.java
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@ -16,16 +16,17 @@ import javax.lang.model.SourceVersion;
import javax.lang.model.element.*;
import javax.lang.model.type.ExecutableType;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.type.TypeVariable;
import javax.tools.Diagnostic;
import javax.tools.FileObject;
import javax.tools.JavaFileObject;
import javax.tools.StandardLocation;
import java.io.*;
import java.lang.annotation.Annotation;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.charset.StandardCharsets;
import java.util.*;
import java.util.function.Function;
import java.util.stream.Collectors;
import static ftbsc.lll.processor.tools.ASTUtils.*;
@ -101,7 +102,7 @@ public class LilleroProcessor extends AbstractProcessor {
@Override
public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
for (TypeElement annotation : annotations) {
if(annotation.getQualifiedName().toString().equals(Patch.class.getName())) {
if(annotation.getQualifiedName().contentEquals(Patch.class.getName())) {
Set<TypeElement> validInjectors =
roundEnv.getElementsAnnotatedWith(annotation)
.stream()
@ -163,29 +164,19 @@ public class LilleroProcessor extends AbstractProcessor {
/**
* Finds the class name and maps it to the correct format.
*
* @param patchAnn the {@link Patch} annotation containing target class info
* @param methodAnn the {@link FindMethod} annotation to fall back on, may be null
* @param mapper the {@link ObfuscationMapper} to use, may be null
* @param finderAnn an annotation containing metadata to fall back on, may be null
* @param parentFun the function to get the parent from the finderAnn
* @return the fully qualified class name
* @since 0.3.0
*/
private static String findClassName(Patch patchAnn, FindMethod methodAnn, ObfuscationMapper mapper) {
private static <T extends Annotation> String findClassName(Patch patchAnn, T finderAnn, Function<T, Class<?>> parentFun) {
String fullyQualifiedName =
methodAnn == null || methodAnn.parent() == Object.class
finderAnn == null || parentFun.apply(finderAnn) == Object.class
? getClassFullyQualifiedName(patchAnn, Patch::value)
: getClassFullyQualifiedName(methodAnn, FindMethod::parent);
return findClassName(fullyQualifiedName, mapper);
}
/**
* Finds the class name and maps it to the correct format.
* @param patchAnn the {@link Patch} annotation containing target class info
* @param mapper the {@link ObfuscationMapper} to use, may be null
* @return the internal class name
* @since 0.3.0
*/
private static String findClassName(Patch patchAnn, ObfuscationMapper mapper) {
return findClassName(patchAnn, null, mapper);
: getClassFullyQualifiedName(finderAnn, parentFun);
return findClassName(fullyQualifiedName, null);
}
/**
@ -204,35 +195,9 @@ public class LilleroProcessor extends AbstractProcessor {
}
}
/**
* Finds the method name and maps it to the correct format.
*
* @param parentFQN the already mapped FQN of the parent class
* @param methodAnn the {@link FindMethod} annotation to fall back on, may be null
* @param stub the {@link ExecutableElement} for the stub
* @return the internal class name
* @since 0.3.0
*/
private String findMethodName(String parentFQN, FindMethod methodAnn, ExecutableElement stub) {
String methodName = methodAnn == null ? stub.getSimpleName().toString() : methodAnn.name();
String methodDescriptor;
if(methodAnn == null)
methodDescriptor = descriptorFromExecutableElement(stub);
else methodDescriptor = methodDescriptorFromParams(methodAnn, FindMethod::params, processingEnv.getElementUtils());
try {
methodName = findMemberName(parentFQN, methodName, methodDescriptor, null);
} catch(MappingNotFoundException e) {
//not found: try again with the name of the annotated method
if(methodAnn == null) {
methodName = findMemberName(parentFQN, stub.getSimpleName().toString(), methodDescriptor, null);
} else throw e;
}
return methodName;
}
/**
* Finds a method given name, container and descriptor.
* @param fullyQualifiedNameParent the fully qualified name of the parent class of the method
* @param parentFQN the fully qualified name of the parent class of the method
* @param name the name to search for
* @param descr the descriptor to search for
* @param strict whether the search should be strict (see {@link Target#strict()} for more info)
@ -241,10 +206,10 @@ public class LilleroProcessor extends AbstractProcessor {
* @throws TargetNotFoundException if it finds no valid candidate
* @since 0.3.0
*/
private ExecutableElement findMethod(String fullyQualifiedNameParent, String name, String descr, boolean strict) {
TypeElement parent = processingEnv.getElementUtils().getTypeElement(fullyQualifiedNameParent);
private ExecutableElement findMethod(String parentFQN, String name, String descr, boolean strict) {
TypeElement parent = processingEnv.getElementUtils().getTypeElement(parentFQN);
if(parent == null)
throw new AmbiguousDefinitionException(String.format("Could not find parent class %s!", fullyQualifiedNameParent));
throw new AmbiguousDefinitionException(String.format("Could not find parent class %s!", parentFQN));
//try to find by name
List<ExecutableElement> candidates = parent.getEnclosedElements()
@ -259,7 +224,7 @@ public class LilleroProcessor extends AbstractProcessor {
return candidates.get(0);
if(descr == null) {
throw new AmbiguousDefinitionException(
String.format("Found %d methods named %s in class %s!", candidates.size(), name, fullyQualifiedNameParent)
String.format("Found %d methods named %s in class %s!", candidates.size(), name, parentFQN)
);
} else {
candidates = candidates.stream()
@ -271,63 +236,63 @@ public class LilleroProcessor extends AbstractProcessor {
throw new TargetNotFoundException(String.format("%s %s", name, descr));
if(candidates.size() > 1)
throw new AmbiguousDefinitionException(
String.format("Found %d methods named %s in class %s!", candidates.size(), name, fullyQualifiedNameParent)
String.format("Found %d methods named %s in class %s!", candidates.size(), name, parentFQN)
);
return candidates.get(0);
}
}
/**
* Finds the real method corresponding to a stub.
* Finds the real class member (field or method) corresponding to a stub annotated with
* {@link Target} or {@link FindMethod} or {@link FindField}.
* @param stub the {@link ExecutableElement} for the stub
* @return the desired method, if it exists
* @return the {@link Element} corresponding to the method or field
* @throws AmbiguousDefinitionException if it finds more than one candidate
* @throws TargetNotFoundException if it finds no valid candidate
* @since 0.3.0
*/
private ExecutableElement findRealMethodFromStub(ExecutableElement stub) {
private Element findMemberFromStub(ExecutableElement stub) {
//the parent always has a @Patch annotation
Patch patchAnn = stub.getEnclosingElement().getAnnotation(Patch.class);
FindMethod findAnn = stub.getAnnotation(FindMethod.class); //this may be null, it means no fallback info
Target target = stub.getAnnotation(Target.class); //if this is null strict mode is always disabled
String parentFQN = findClassName(patchAnn, findAnn, null);
String methodName = findMethodName(findClassName(patchAnn, findAnn, null), findAnn, stub);
//there should ever only be one of these
Target targetAnn = stub.getAnnotation(Target.class); //if this is null strict mode is always disabled
FindMethod findMethodAnn = stub.getAnnotation(FindMethod.class); //this may be null, it means no fallback info
FindField findFieldAnn = stub.getAnnotation(FindField.class);
String parentFQN, memberName;
if(findFieldAnn == null) { //methods
parentFQN = findClassName(patchAnn, findMethodAnn, FindMethod::parent);
String methodDescriptor =
findMethodAnn != null
? methodDescriptorFromParams(findMethodAnn, FindMethod::params, processingEnv.getElementUtils())
: descriptorFromExecutableElement(stub);
memberName =
findMethodAnn != null && !findMethodAnn.name().equals("")
? findMethodAnn.name()
: stub.getSimpleName().toString();
return findMethod(
parentFQN,
methodName,
descriptorFromExecutableElement(stub),
target != null && target.strict());
}
/**
* Finds the real field corresponding to a stub.
* @param stub the {@link ExecutableElement} for the stub
* @return the desired method, if it exists
* @throws TargetNotFoundException if it finds no valid candidate
* @since 0.3.0
*/
private VariableElement findField(ExecutableElement stub) {
Patch patchAnn = stub.getEnclosingElement().getAnnotation(Patch.class);
FindField fieldAnn = stub.getAnnotation(FindField.class);
String parentName;
if(fieldAnn.parent().equals(Object.class))
parentName = getClassFullyQualifiedName(patchAnn, Patch::value);
else parentName = getClassFullyQualifiedName(fieldAnn, FindField::parent);
parentName = findClassName(parentName, null);
String name = fieldAnn.name().equals("")
memberName,
methodDescriptor,
targetAnn != null && targetAnn.strict()
);
} else { //fields
parentFQN = findClassName(patchAnn, findFieldAnn, FindField::parent);
memberName = findFieldAnn.name().equals("")
? stub.getSimpleName().toString()
: fieldAnn.name();
TypeElement parent = processingEnv.getElementUtils().getTypeElement(parentName);
: findFieldAnn.name();
TypeElement parent = processingEnv.getElementUtils().getTypeElement(parentFQN);
List<VariableElement> candidates =
parent.getEnclosedElements()
.stream()
.filter(f -> f instanceof VariableElement)
.filter(f -> f.getSimpleName().contentEquals(name))
.filter(f -> f.getSimpleName().contentEquals(memberName))
.map(f -> (VariableElement) f)
.collect(Collectors.toList());
if(candidates.size() == 0)
throw new TargetNotFoundException(stub.getSimpleName().toString());
else return candidates.get(0); //there can only ever be one
}
}
/**
* Generates the Injector(s) contained in the given class.
@ -337,7 +302,9 @@ public class LilleroProcessor extends AbstractProcessor {
private void generateInjectors(TypeElement cl) {
//find class information
Patch patchAnn = cl.getAnnotation(Patch.class);
String targetClassFQN = findClassName(patchAnn, mapper).replace('/', '.');
String targetClassFQN =
findClassName(getClassFullyQualifiedName(patchAnn, Patch::value), this.mapper)
.replace('/', '.');
//find package information
Element packageElement = cl.getEnclosingElement();
@ -371,7 +338,7 @@ public class LilleroProcessor extends AbstractProcessor {
injectionCandidates =
injectionCandidates
.stream()
.filter(i -> i.getSimpleName().toString().equals(injectorAnn.targetName()))
.filter(i -> i.getSimpleName().contentEquals(injectorAnn.targetName()))
.collect(Collectors.toList());
} else if(targets.size() == 1) {
//case 2: there is only one target
@ -432,7 +399,7 @@ public class LilleroProcessor extends AbstractProcessor {
String targetMethodDescriptor = descriptorFromExecutableElement(toGenerate.get(injName).target);
String targetMethodName = findMemberName(targetClassFQN, toGenerate.get(injName).target.getSimpleName().toString(), targetMethodDescriptor, this.mapper);
MethodSpec stubOverride = MethodSpec.overriding(toGenerate.get(injName).target)
MethodSpec stubOverride = MethodSpec.overriding(toGenerate.get(injName).targetStub)
.addStatement("throw new $T($S)", RuntimeException.class, "This is a stub and should not have been called")
.build();
@ -510,7 +477,7 @@ public class LilleroProcessor extends AbstractProcessor {
.filter(m -> !m.getModifiers().contains(Modifier.STATIC)) //skip static stuff as we can't override it
.filter(m -> !m.getModifiers().contains(Modifier.FINAL)) //in case someone is trying to be funny
.forEach(m -> {
ExecutableElement targetMethod = findRealMethodFromStub(m);
ExecutableElement targetMethod = (ExecutableElement) findMemberFromStub(m);
MethodSpec.Builder b = MethodSpec.overriding(m);
String targetParentFQN = findClassName(((TypeElement) targetMethod.getEnclosingElement()).getQualifiedName().toString(), mapper);
@ -539,7 +506,7 @@ public class LilleroProcessor extends AbstractProcessor {
.filter(m -> !m.getModifiers().contains(Modifier.STATIC))
.filter(m -> !m.getModifiers().contains(Modifier.FINAL))
.forEach(m -> {
VariableElement targetField = findField(m);
VariableElement targetField = (VariableElement) findMemberFromStub(m);
MethodSpec.Builder b = MethodSpec.overriding(m);
String targetParentFQN = findClassName(((TypeElement) targetField.getEnclosingElement()).getQualifiedName().toString(), mapper);
@ -553,8 +520,8 @@ public class LilleroProcessor extends AbstractProcessor {
b.addStatement("bd.setParent($S)", ((TypeElement) targetField.getEnclosingElement()).getQualifiedName().toString());
for(Modifier mod : targetField.getModifiers())
b.addStatement("bd.addModifier($L)", mapModifier(mod));
b.addStatement("bd.setType($T.class)", targetField.asType());
b.addStatement("return bd.build()");
@ -584,26 +551,31 @@ public class LilleroProcessor extends AbstractProcessor {
* Container for information about a class that is to be generated.
* Only used internally.
*/
private static class InjectorInfo {
public class InjectorInfo {
/**
* The {@link ExecutableElement} corresponding to the injector method.
*/
public final ExecutableElement injector;
/**
* The {@link ExecutableElement} corresponding to the target method stub.
*/
public final ExecutableElement targetStub;
/**
* The {@link ExecutableElement} corresponding to the target method.
*/
public final ExecutableElement target;
private final ExecutableElement target;
/**
* Public constructor.
* @param injector the injector {@link ExecutableElement}
* @param target the target {@link ExecutableElement}
* @param targetStub the target {@link ExecutableElement}
*/
public InjectorInfo(ExecutableElement injector, ExecutableElement target) {
public InjectorInfo(ExecutableElement injector, ExecutableElement targetStub) {
this.injector = injector;
this.target = target;
this.targetStub = targetStub;
this.target = (ExecutableElement) findMemberFromStub(targetStub);
}
}
}