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feat: MVP!

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zaaarf 2023-02-27 02:26:06 +01:00
parent 25869ddc92
commit 252272ac42
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2 changed files with 99 additions and 68 deletions
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7
build.gradle
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@ -3,14 +3,17 @@ plugins {
}
group 'ftbsc.lll.processor'
sourceCompatibility = 1.8
targetCompatibility = 1.8
repositories {
mavenCentral()
maven { url = 'https://maven.fantabos.co' }
}
//TODO: figure out how to make annotationProcessor inherit its dependencies
dependencies {
implementation 'com.squareup:javapoet:1.13.0'
implementation 'ftbsc:lll:0.2.0'
implementation 'org.ow2.asm:asm-commons:9.4' //just for the javadocs
implementation 'ftbsc:lll:0.2.1'
implementation 'org.ow2.asm:asm-commons:9.4'
}

160
src/main/java/ftbsc/lll/processor/LilleroProcessor.java
View file

@ -4,6 +4,7 @@ import com.squareup.javapoet.*;
import ftbsc.lll.IInjector;
import ftbsc.lll.processor.annotations.Injector;
import ftbsc.lll.processor.annotations.Patch;
import ftbsc.lll.processor.annotations.Target;
import ftbsc.lll.processor.exceptions.MappingNotFoundException;
import ftbsc.lll.processor.exceptions.MappingsFileNotFoundException;
import ftbsc.lll.tools.DescriptorBuilder;
@ -13,24 +14,22 @@ import org.objectweb.asm.tree.MethodNode;
import javax.annotation.processing.*;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.TypeElement;
import javax.lang.model.element.*;
import javax.lang.model.type.ExecutableType;
import javax.lang.model.type.MirroredTypeException;
import javax.lang.model.type.TypeMirror;
import javax.tools.Diagnostic;
import javax.tools.FileObject;
import javax.tools.JavaFileObject;
import javax.tools.StandardLocation;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.*;
import java.lang.annotation.Annotation;
import java.lang.annotation.Target;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
/**
* The actual annotation processor behind the magic.
@ -39,6 +38,11 @@ import java.util.Set;
@SupportedAnnotationTypes("ftbsc.lll.processor.annotations.Patch")
@SupportedSourceVersion(SourceVersion.RELEASE_8)
public class LilleroProcessor extends AbstractProcessor {
/**
* A {@link Set} of {@link String}s that will contain the fully qualified names
* of the generated injector files.
*/
private final Set<String> generatedInjectors = new HashSet<>();
/**
* Where the actual processing happens.
@ -47,27 +51,36 @@ public class LilleroProcessor extends AbstractProcessor {
* remaining class.
* @see LilleroProcessor#isValidInjector(TypeElement)
* @param annotations the annotation types requested to be processed
* @param roundEnv environment for information about the current and prior round
* @param roundEnv environment for information about the current and prior round
* @return whether or not the set of annotation types are claimed by this processor
*/
@Override
public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
Set<TypeElement> validInjectors = new HashSet<>();
for (TypeElement annotation : annotations) {
if(isValidInjector(annotation))
validInjectors.add(annotation);
else processingEnv.getMessager().printMessage(
Diagnostic.Kind.WARNING,
"Missing valid inject() method on @Injector class " + annotation.getQualifiedName() + "."
);
if(annotation.getQualifiedName().toString().equals(Patch.class.getName())) {
Set<TypeElement> validInjectors = new HashSet<>();
Set<TypeElement> potentialInjectors =
roundEnv.getElementsAnnotatedWith(annotation)
.stream()
.map(e -> (TypeElement) e)
.collect(Collectors.toSet());
for(TypeElement p : potentialInjectors)
if(isValidInjector(p))
validInjectors.add(p);
else processingEnv.getMessager().printMessage(
Diagnostic.Kind.WARNING,
"Missing valid @Injector method in @Patch class " + p + ", skipping."
);
if(validInjectors.isEmpty())
return false;
validInjectors.forEach(this::generateInjector);
if(this.generatedInjectors.isEmpty())
return false;
generateServiceProvider();
return true;
}
}
if(validInjectors.isEmpty())
return false;
validInjectors.forEach(this::generateInjector);
generateServiceProvider(validInjectors);
return true;
return false;
}
/**
@ -84,7 +97,7 @@ public class LilleroProcessor extends AbstractProcessor {
&& elem.getEnclosedElements().stream().anyMatch(e -> {
List<? extends TypeMirror> params = ((ExecutableType) e.asType()).getParameterTypes();
return e.getAnnotation(Injector.class) != null
&& e.getAnnotation(Target.class) != null
&& e.getAnnotation(Target.class) == null
&& e.getModifiers().contains(Modifier.PUBLIC)
&& e.getModifiers().contains(Modifier.STATIC)
&& params.size() == 2
@ -103,22 +116,21 @@ public class LilleroProcessor extends AbstractProcessor {
* @return the {@link MethodSpec} representing the desired method
*/
@SuppressWarnings("OptionalGetWithoutIsPresent")
private static MethodSpec findAnnotatedMethod(TypeElement cl, Class<? extends Annotation> ann) {
return MethodSpec.overriding(
(ExecutableElement) cl.getEnclosedElements()
.stream()
.filter(e -> e.getAnnotation(ann) != null)
.findFirst()
.get() //will never be null so can ignore warning
).build();
private static ExecutableElement findAnnotatedMethod(TypeElement cl, Class<? extends Annotation> ann) {
return (ExecutableElement) cl.getEnclosedElements()
.stream()
.filter(e -> e.getAnnotation(ann) != null)
.findFirst()
.get(); //will never be null so can ignore warning
}
/**
* Builds a type descriptor from the given {@link TypeName}
* @param type the {@link TypeName} representing the desired type
* Builds a type descriptor from the given {@link TypeMirror}
* @param t the {@link TypeMirror} representing the desired type
* @return a {@link String} containing the relevant descriptor
*/
public static String descriptorFromType(TypeName type) {
public static String descriptorFromType(TypeMirror t) {
TypeName type = TypeName.get(t);
StringBuilder desc = new StringBuilder();
//add array brackets
while(type instanceof ArrayTypeName) {
@ -128,7 +140,6 @@ public class LilleroProcessor extends AbstractProcessor {
if(type instanceof ClassName) {
ClassName var = (ClassName) type;
desc.append(DescriptorBuilder.nameToDescriptor(var.canonicalName(), 0));
desc.append(";");
} else {
if(TypeName.BOOLEAN.equals(type))
desc.append("Z");
@ -146,21 +157,23 @@ public class LilleroProcessor extends AbstractProcessor {
desc.append("J");
else if(TypeName.DOUBLE.equals(type))
desc.append("D");
else if(TypeName.VOID.equals(type))
desc.append("V");
}
return desc.toString();
}
/**
* Builds a method descriptor from the given {@link MethodSpec}.
* @param m the {@link MethodSpec} for the method
* Builds a method descriptor from the given {@link ExecutableElement}.
* @param m the {@link ExecutableElement} for the method
* @return a {@link String} containing the relevant descriptor
*/
public static String descriptorFromMethodSpec(MethodSpec m) {
public static String descriptorFromMethodSpec(ExecutableElement m) {
StringBuilder methodSignature = new StringBuilder();
methodSignature.append("(");
m.parameters.forEach(p -> methodSignature.append(descriptorFromType(p.type)));
m.getParameters().forEach(p -> methodSignature.append(descriptorFromType(p.asType())));
methodSignature.append(")");
methodSignature.append(descriptorFromType(m.returnType));
methodSignature.append(descriptorFromType(m.getReturnType()));
return methodSignature.toString();
}
@ -171,29 +184,34 @@ public class LilleroProcessor extends AbstractProcessor {
*/
private void generateInjector(TypeElement cl) {
Patch ann = cl.getAnnotation(Patch.class);
MethodSpec targetMethod = findAnnotatedMethod(cl, Target.class);
MethodSpec injectorMethod = findAnnotatedMethod(cl, Injector.class);
ExecutableElement targetMethod = findAnnotatedMethod(cl, Target.class);
ExecutableElement injectorMethod = findAnnotatedMethod(cl, Injector.class);
SrgMapper mapper;
try {
mapper = new SrgMapper(Files.lines(Paths.get("build/createMcpToSrg/output.tsrg")));
try { //TODO: cant we get it from local?
URL url = new URL("https://data.fantabos.co/output.tsrg");
InputStream is = url.openStream();
mapper = new SrgMapper(new BufferedReader(new InputStreamReader(is,
StandardCharsets.UTF_8)).lines());
is.close();
} catch(IOException e) {
throw new MappingsFileNotFoundException();
}
String packageName = cl.getQualifiedName().toString().replace("." + cl.getSimpleName().toString(), "");
Element packageElement = cl.getEnclosingElement();
while (packageElement.getKind() != ElementKind.PACKAGE)
packageElement = packageElement.getEnclosingElement();
String packageName = packageElement.toString();
String className = cl.getQualifiedName().toString();
String simpleClassName = cl.getSimpleName().toString();
String injectorClassName = className + "Injector";
String injectorSimpleClassName = simpleClassName + "Injector";
String injectorClassName = packageName + "." + injectorSimpleClassName;
MethodSpec name = MethodSpec.methodBuilder("name")
.addModifiers(Modifier.PUBLIC)
.returns(String.class)
.addStatement("return $S", simpleClassName)
.addStatement("return $S", injectorSimpleClassName)
.build();
MethodSpec reason = MethodSpec.methodBuilder("reason")
@ -202,27 +220,35 @@ public class LilleroProcessor extends AbstractProcessor {
.addStatement("return $S", ann.reason())
.build();
String targetClassCanonicalName;
try {
targetClassCanonicalName = ann.value().getCanonicalName();
} catch(MirroredTypeException e) {
targetClassCanonicalName = e.getTypeMirror().toString();
}
//pretty sure class names de facto never change but better safe than sorry
String targetClassSrgName = mapper.getMcpClass(
ClassName.get(ann.value()).canonicalName().replace('.', '/')
targetClassCanonicalName.replace('.', '/')
);
if(targetClassSrgName == null)
throw new MappingNotFoundException(ClassName.get(ann.value()).canonicalName());
throw new MappingNotFoundException(targetClassCanonicalName);
MethodSpec targetClass = MethodSpec.methodBuilder("targetClass")
.addModifiers(Modifier.PUBLIC)
.returns(String.class)
.addStatement("return $S", targetClassSrgName)
.addStatement("return $S", targetClassSrgName.replace('/', '.'))
.build();
String targetMethodDescriptor = descriptorFromMethodSpec(targetMethod);
String targetMethodSrgName = mapper.getSrgMember(
ann.value().getName(), targetMethod.name + " " + targetMethodDescriptor
targetClassCanonicalName.replace('.', '/'),
targetMethod.getSimpleName() + " " + targetMethodDescriptor
);
if(targetMethodSrgName == null)
throw new MappingNotFoundException(targetMethod.name + " " + targetMethodDescriptor);
throw new MappingNotFoundException(targetMethod.getSimpleName() + " " + targetMethodDescriptor);
MethodSpec methodName = MethodSpec.methodBuilder("methodName")
.addModifiers(Modifier.PUBLIC)
@ -233,21 +259,21 @@ public class LilleroProcessor extends AbstractProcessor {
MethodSpec methodDesc = MethodSpec.methodBuilder("methodDesc")
.addModifiers(Modifier.PUBLIC)
.returns(String.class)
.addCode("return $S", targetMethodDescriptor)
.addCode("return $S;", targetMethodDescriptor)
.build();
MethodSpec inject = MethodSpec.methodBuilder("inject")
.addModifiers(Modifier.PUBLIC)
.returns(void.class)
.addParameter(ParameterSpec.builder(
(TypeName) processingEnv
TypeName.get(processingEnv
.getElementUtils()
.getTypeElement("org.objectweb.asm.tree.ClassNode").asType(), "clazz").build())
.getTypeElement("org.objectweb.asm.tree.ClassNode").asType()), "clazz").build())
.addParameter(ParameterSpec.builder(
(TypeName) processingEnv
TypeName.get(processingEnv
.getElementUtils()
.getTypeElement("org.objectweb.asm.tree.MethodNode").asType(), "main").build())
.addStatement("$S.$S(clazz, main)", className, injectorMethod.name)
.getTypeElement("org.objectweb.asm.tree.MethodNode").asType()), "main").build())
.addStatement("$T." + injectorMethod.getSimpleName() + "(clazz, main)", TypeName.get(cl.asType()))
.build();
TypeSpec injectorClass = TypeSpec.classBuilder(injectorSimpleClassName)
@ -267,6 +293,7 @@ public class LilleroProcessor extends AbstractProcessor {
JavaFile javaFile = JavaFile.builder(packageName, injectorClass).build();
javaFile.writeTo(out);
out.close();
this.generatedInjectors.add(injectorClassName);
} catch(IOException e) {
throw new RuntimeException(e);
}
@ -274,14 +301,15 @@ public class LilleroProcessor extends AbstractProcessor {
/**
* Generates the Service Provider file for the generated injectors.
* It gets their names by appending "Injector" to the original class.
* @param inj a {@link Set} of {@link TypeElement} representing the valid injector generators
*/
private void generateServiceProvider(Set<TypeElement> inj) {
private void generateServiceProvider() {
try {
FileObject serviceProvider = processingEnv.getFiler().createResource(StandardLocation.CLASS_OUTPUT, "", "ftbsc.lll.IInjector");
FileObject serviceProvider =
processingEnv.getFiler().createResource(
StandardLocation.CLASS_OUTPUT, "", "META-INF/services/ftbsc.lll.IInjector"
);
PrintWriter out = new PrintWriter(serviceProvider.openWriter());
inj.forEach(i -> out.println(i.getQualifiedName() + "Injector"));
this.generatedInjectors.forEach(out::println);
out.close();
} catch(IOException e) {
throw new RuntimeException(e);