Readme, support for enforcing no reflection

README.md

@@ -0,0 +1,28 @@
+# Gson-Compile
+A java annotation processor implementing automated type adapter generation for gson-comments.
+The goal of this AP is to
+- Support common features such as getters, setters, fields, constructors
+- Support modern language features such as records
+- Support json5 through gson-comments
+- Be compile-time where possible (ideally compatible with proguard)
+
+## Currently supported
+- Primitive types
+- Adapter generation
+- Utility methods
+- Strict no-reflection enforcement via `-AgsonCompileNoReflect`
+
+## TODO
+- Arrays
+- Comments
+- Nested serializable types
+- Date
+- Enums
+- Lists
+- Maps
+- Queues
+- Records
+- Support for nested types from libraries
+- Sets
+- Static classes (for configs)
+- GPrefer to bypass builder/constructor recovery

gson-compile-core/build.gradle.kts

@@ -13,7 +13,3 @@ repositories {
 dependencies {
     api("io.gitlab.jfronny:commons-gson:2022.10.22+20-29-33")
 }
-
-tasks.getByName<Test>("test") {
-    useJUnitPlatform()
-}

gson-compile-example/build.gradle.kts

@@ -17,3 +17,6 @@ dependencies {
     implementation(project(":gson-compile-core"))
 }
 
+tasks.withType<JavaCompile> {
+    options.compilerArgs.add("-AgsonCompileNoReflect")
+}

gson-compile-example/src/main/java/io/gitlab/jfronny/gson/Main.java

@@ -1,13 +1,10 @@
 package io.gitlab.jfronny.gson;
 
 import io.gitlab.jfronny.gson.compile.annotations.GSerializable;
-import io.gitlab.jfronny.gson.stream.JsonReader;
-import io.gitlab.jfronny.gson.stream.JsonWriter;
 
 public class Main {
     public static void main(String[] args) {
         System.out.println("Hello world!");
-        //JsonReader
     }
 
     @GSerializable(generateAdapter = true)

gson-compile-processor/src/main/java/io/gitlab/jfronny/gson/compile/processor/GsonCompileProcessor.java

@@ -20,9 +20,9 @@ import java.lang.reflect.ParameterizedType;
 import java.util.*;
 import java.util.stream.Collectors;
 
-//TODO support for records
 @SupportedSourceVersion(SourceVersion.RELEASE_17)
 @SupportedAnnotationTypes2({GSerializable.class})
+@SupportedOptions({"gsonCompileNoReflect"})
 public class GsonCompileProcessor extends AbstractProcessor2 {
     private Messager message;
     private Types typeUtils;
@@ -30,6 +30,7 @@ public class GsonCompileProcessor extends AbstractProcessor2 {
     private Set<ClassName> seen;
     private ValueCreator valueCreator;
     private Elements elements;
+    private Map<String, String> options;
 
     @Override
     public synchronized void init(ProcessingEnvironment processingEnv) {
@@ -38,6 +39,7 @@ public class GsonCompileProcessor extends AbstractProcessor2 {
         filer = processingEnv.getFiler();
         typeUtils = processingEnv.getTypeUtils();
         elements = processingEnv.getElementUtils();
+        options = processingEnv.getOptions();
         seen = new LinkedHashSet<>();
         valueCreator = new ValueCreator(processingEnv);
     }
@@ -188,9 +190,9 @@ public class GsonCompileProcessor extends AbstractProcessor2 {
                         .addException(IOException.class)
                         .returns(classType)
                         .addCode("""
-                                try ($1T reader = new $1T(in)) {
+                                try ($T reader = $T.HOLDER.getGson().newJsonReader(in)) {
                                     return read(reader);
-                                }""", Const.GSON_READER)
+                                }""", Const.GSON_READER, Const.CCORE)
                         .build()
         );
 
@@ -227,9 +229,9 @@ public class GsonCompileProcessor extends AbstractProcessor2 {
                         .addParameter(classType, "value")
                         .addException(IOException.class)
                         .addCode("""
-                                try ($1T writer = new $1T(out)) {
+                                try ($T writer = $T.HOLDER.getGson().newJsonWriter(out)) {
                                     write(writer, value);
-                                }""", Const.GSON_WRITER)
+                                }""", Const.GSON_WRITER, Const.CCORE)
                         .build()
         );
 
@@ -437,6 +439,7 @@ public class GsonCompileProcessor extends AbstractProcessor2 {
                 );
             } else message.printMessage(Diagnostic.Kind.ERROR, "@JsonAdapter value must by TypeAdapter or TypeAdapterFactory reference.", prop.getElement());
         } else {
+            message.printMessage(options.containsKey("gsonCompileNoReflect") ? Diagnostic.Kind.ERROR : Diagnostic.Kind.WARNING, "Falling back to adapter detection for unsupported type " + prop.getType(), prop.getElement());
             //TODO handle known custom type adapters and return proper static class
             TypeName typeAdapterType = ParameterizedTypeName.get(Const.TYPE_ADAPTER, TypeName.get(prop.getType()).box());
             CodeBlock.Builder block = CodeBlock.builder();