o Initial import.

18 files changed, 945 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..612c5bc
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+target
+.idea
+*.iml
diff --git a/container-compiler-plugin/pom.xml b/container-compiler-plugin/pom.xml
new file mode 100644
index 0000000..beb4b55
--- /dev/null
+++ b/container-compiler-plugin/pom.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <artifactId>container-playground</artifactId>
+    <groupId>io.trygvis.container</groupId>
+    <version>1.0-SNAPSHOT</version>
+  </parent>
+  <artifactId>container-compiler-plugin</artifactId>
+  <dependencies>
+    <dependency>
+      <groupId>io.trygvis.container</groupId>
+      <artifactId>container-core</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+  </dependencies>
+</project>
diff --git a/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/MyProcessor.java b/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/MyProcessor.java
new file mode 100644
index 0000000..0ec7001
--- /dev/null
+++ b/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/MyProcessor.java
@@ -0,0 +1,246 @@
+package io.trygvis.container.compiler;
+
+import io.trygvis.container.compiler.model.ClassG;
+import io.trygvis.container.compiler.model.FieldRef;
+import io.trygvis.container.compiler.model.ParameterRef;
+import io.trygvis.container.compiler.model.TypeRef;
+import io.trygvis.container.log.Log;
+import io.trygvis.container.tx.PlatformTransactionManager;
+import org.springframework.transaction.annotation.Transactional;
+
+import javax.annotation.processing.Completion;
+import javax.annotation.processing.ProcessingEnvironment;
+import javax.annotation.processing.Processor;
+import javax.annotation.processing.RoundEnvironment;
+import javax.lang.model.SourceVersion;
+import javax.lang.model.element.AnnotationMirror;
+import javax.lang.model.element.Element;
+import javax.lang.model.element.ExecutableElement;
+import javax.lang.model.element.Modifier;
+import javax.lang.model.element.Name;
+import javax.lang.model.element.TypeElement;
+import javax.lang.model.element.VariableElement;
+import javax.lang.model.type.TypeKind;
+import javax.lang.model.type.TypeMirror;
+import javax.lang.model.util.Elements;
+import javax.lang.model.util.Types;
+import javax.tools.JavaFileObject;
+import java.io.CharArrayWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import static java.util.Arrays.asList;
+import static java.util.Collections.emptyList;
+import static java.util.Collections.emptySet;
+import static javax.lang.model.util.ElementFilter.constructorsIn;
+import static org.springframework.util.StringUtils.collectionToDelimitedString;
+
+public class MyProcessor implements Processor {
+
+    private ProcessingEnvironment processingEnv;
+    private Elements elements;
+    private Types types;
+
+    @Override
+    public Set<String> getSupportedOptions() {
+        return emptySet();
+    }
+
+    @Override
+    public SourceVersion getSupportedSourceVersion() {
+        return SourceVersion.RELEASE_5;
+    }
+
+    @Override
+    public void init(ProcessingEnvironment processingEnv) {
+        this.processingEnv = processingEnv;
+        elements = processingEnv.getElementUtils();
+        types = processingEnv.getTypeUtils();
+    }
+
+    @Override
+    public Iterable<? extends Completion> getCompletions(Element element, AnnotationMirror annotation, ExecutableElement member, String userText) {
+        return emptyList();
+    }
+
+    @Override
+    public Set<String> getSupportedAnnotationTypes() {
+        return new HashSet<>(asList(Transactional.class.getName(), Log.class.getName()));
+    }
+
+    @Override
+    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
+        Set<? extends Element> transactional = roundEnv.getElementsAnnotatedWith(Transactional.class);
+
+        TypeElement tx = elements.getTypeElement(Transactional.class.getCanonicalName());
+        TypeElement log = elements.getTypeElement(Transactional.class.getCanonicalName());
+
+        for (Element element : transactional) {
+            try {
+                System.out.println("Processing: " + element);
+                for (AnnotationMirror annotationMirror : element.getAnnotationMirrors()) {
+
+                    System.out.println("annotationMirror.getAnnotationType().asElement().getSimpleName() = " + annotationMirror.getAnnotationType().asElement().getSimpleName());
+
+                    if (types.isSameType(tx.asType(), annotationMirror.getAnnotationType())) {
+                        processTransactional((TypeElement) element);
+                    }
+//                    if (types.isSameType(log.asType(), annotationMirror.getAnnotationType())) {
+//                        processLog((TypeElement) element);
+//                    }
+                }
+            } catch (RuntimeException e) {
+                throw e;
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        }
+        return true;
+    }
+
+    private void processTransactional(TypeElement element) throws IOException {
+        Name targetClassName = element.getSimpleName();
+        System.out.println("Processing @Transactional " + targetClassName);
+
+        Transactional transactional = element.getAnnotation(Transactional.class);
+
+        String p = elements.getPackageOf(element).getQualifiedName().toString();
+
+        String className = targetClassName + "_Transactional";
+
+        JavaFileObject sourceFile = processingEnv.getFiler().createSourceFile(p + "." + className, element);
+
+        try (PrintWriter w = new PrintWriter(sourceFile.openWriter())) {
+            ClassG g = new ClassG(p, className, targetClassName.toString());
+//            writer.println("package " + p + ";");
+//            writer.println();
+//            writer.println("import io.trygvis.container.tx.PlatformTransactionManager;");
+//            writer.println();
+//            writer.println("public class " + className + " extends " + targetClassName + " {");
+//            writer.println("    private final PlatformTransactionManager transactionManager;");
+//            writer.println();
+
+            TypeRef platformTransactionManager = g.addImport(PlatformTransactionManager.class);
+            FieldRef transactionManager = g.addField(PlatformTransactionManager.class, "transactionManager");
+
+            for (ExecutableElement constructor : constructorsIn(elements.getAllMembers(element))) {
+                if (!constructor.getModifiers().contains(Modifier.PUBLIC)) {
+                    continue;
+                }
+
+                constructor(g, constructor);
+            }
+
+//            System.out.println("elements.getTypeElement(\"Object\") = " + elements.getTypeElement("java.lang.Object"));
+            Name javaLangObjectName = elements.getTypeElement("java.lang.Object").getQualifiedName();
+
+            for (Element e : elements.getAllMembers(element)) {
+                if (!(e instanceof ExecutableElement)) {
+                    continue;
+                }
+
+                ExecutableElement ee = (ExecutableElement) e;
+
+                TypeElement enclosingElement = (TypeElement) ee.getEnclosingElement();
+
+                if (enclosingElement.getQualifiedName().equals(javaLangObjectName)) {
+                    continue;
+                }
+
+                if (ee.getSimpleName().toString().equals("<init>")) {
+                    continue;
+                }
+
+//                System.out.println("ee.getSimpleName() = " + ee.getSimpleName());
+//                System.out.println("ee.getEnclosingElement() = " + enclosingElement);
+//                System.out.println("ee.getEnclosingElement().getQualifiedName() = " + enclosingElement.getQualifiedName());
+//                System.out.println("ee.getEnclosingElement().asType().getKind().getDeclaringClass() = " + enclosingElement.asType().getKind().getDeclaringClass());
+
+                TypeMirror returnTypeMirror = ee.getReturnType();
+
+                TypeKind kind = returnTypeMirror.getKind();
+
+                boolean isVoid = kind == TypeKind.VOID;
+                TypeRef returnType = isVoid ? TypeRef.VOID : g.addImport(returnTypeMirror);
+//                String returnString;
+//                if (isVoid) {
+//                    returnString = "void";
+//                } else {
+//                    returnString = returnTypeMirror.toString();
+//                }
+
+                List<ParameterRef> parameters = new ArrayList<>();
+                List<String> arguments = new ArrayList<>();
+                for (VariableElement ve : ee.getParameters()) {
+//                    parameters.add("final " + ve.asType().toString() + " " + ve.getSimpleName().toString());
+                    TypeRef k = g.addImport(ve.asType());
+                    parameters.add(new ParameterRef(k, ve.getSimpleName().toString()));
+                    arguments.add(ve.getSimpleName().toString());
+                }
+
+                CharArrayWriter buffer = new CharArrayWriter();
+                PrintWriter m = new PrintWriter(buffer);
+                g.addMethod(buffer.toString(), returnType, ee.getSimpleName().toString(), parameters.toArray(new ParameterRef[arguments.size()]));
+
+//                writer.println();
+//                writer.println("    public " + returnString + " " + ee.getSimpleName() + "(" + collectionToDelimitedString(parameters, ", ") + ") {");
+
+/*
+                writer.println("        " + (isVoid ? "" : "return ") + "transactionManager.doInTransaction(");
+                writer.println("                PlatformTransactionManager.TransactionIsolation.ISOLATION_" + transactional.isolation() + ",");
+                writer.println("                PlatformTransactionManager.TransactionPropagation.PROPAGATION_" + transactional.propagation() + ",");
+                writer.println("                new PlatformTransactionManager.TransactionTemplate<" + (isVoid ? "Object" : returnTypeMirror) + ">() {");
+                writer.println("                    @Override");
+                writer.println("                    public " + (isVoid ? "Object" : returnTypeMirror) + " doInTransaction() {");
+                String targetInvocation = className + ".super." + ee.getSimpleName() + "(" + collectionToDelimitedString(arguments, ", ") + ");";
+
+                if (isVoid) {
+                    writer.println("                        " + targetInvocation);
+                    writer.println("                        return null;");
+                } else {
+                    writer.print("                        return ");
+                    writer.println(targetInvocation);
+                }
+
+                writer.println("                    }");
+                writer.println("                });");
+                writer.println("    }");
+*/
+
+                elements.printElements(new PrintWriter(System.out), ee);
+            }
+//            writer.println("}");
+            g.write(w);
+        }
+    }
+
+    private void constructor(ClassG g, ExecutableElement constructor) {
+        List<ParameterRef> parameters = new ArrayList<>();
+        List<String> goesToSuper = new ArrayList<>();
+
+        TypeRef k = g.addImport(PlatformTransactionManager.class);
+        parameters.add(new ParameterRef(k, "_transactionManager_"));
+
+        for (VariableElement p : constructor.getParameters()) {
+//            parameters.add(p.asType().toString() + " " + p.getSimpleName().toString());
+//            arguments.add(p.getSimpleName().toString());
+            k = g.addImport(p.asType());
+            String name = p.getSimpleName().toString();
+            parameters.add(new ParameterRef(k, name));
+            goesToSuper.add(name);
+        }
+
+//        String params = parameters.size() == 0 ? "" : ", " + collectionToDelimitedString(parameters, ", ");
+
+        g.simpleConstructor(parameters, goesToSuper);
+
+//        writer.println("    public " + className + "(PlatformTransactionManager _transactionManager_" + params + ") {");
+//        writer.println("        super(" + collectionToDelimitedString(arguments, ", ") + ");");
+//        writer.println("        this.transactionManager = _transactionManager_;");
+//        writer.println("    }");
+    }
+}
diff --git a/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/ClassG.java b/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/ClassG.java
new file mode 100644
index 0000000..6c0e246
--- /dev/null
+++ b/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/ClassG.java
@@ -0,0 +1,157 @@
+package io.trygvis.container.compiler.model;
+
+import javax.lang.model.type.TypeMirror;
+import java.io.CharArrayWriter;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+import java.util.TreeSet;
+
+import static org.springframework.util.StringUtils.collectionToDelimitedString;
+
+public class ClassG {
+    private final String packageName;
+    private final String className;
+    private final String extendsClass;
+    private final Set<TypeRef> imports = new TreeSet<>();
+    private final Set<FieldRef> fields = new TreeSet<>();
+    private final List<MethodRef> methods = new ArrayList<>();
+
+//    public ClassG(String packageName, String className) {
+//        this(packageName, className, null);
+//    }
+
+    public ClassG(String packageName, String className, String extendsClass) {
+        this.packageName = packageName;
+        this.className = className;
+        this.extendsClass = extendsClass;
+    }
+
+    public TypeRef addImport(final TypeMirror type) {
+        if (type.getKind().isPrimitive()) {
+            return TypeRef.find(type.getKind());
+        }
+
+        String canonicalName = type.toString();
+        System.out.println("canonicalName = " + canonicalName);
+
+        for (TypeRef i : imports) {
+            if (i.canonicalName().equals(canonicalName)) {
+                return i;
+            }
+        }
+
+        TypeRef ref = new TypeRef(canonicalName, canonicalName);
+        imports.add(ref);
+        return ref;
+    }
+
+    public TypeRef addImport(Class<?> klass) {
+//        if (klass.isPrimitive()) {
+//            return TypeRef.PRIMITIVE;
+//        }
+
+        String canonicalName = klass.getCanonicalName();
+        String simpleName = klass.getSimpleName();
+        String name = simpleName;
+        for (TypeRef i : imports) {
+            if (i.canonicalName().equals(canonicalName)) {
+                return i;
+            }
+
+            if (i.name.equals(simpleName)) {
+                name = canonicalName;
+                break;
+            }
+        }
+
+        TypeRef ref = new TypeRef(name, canonicalName);
+        imports.add(ref);
+
+        return ref;
+    }
+
+    public FieldRef addField(Class<?> klass, String name) {
+        TypeRef type = addImport(klass);
+        FieldRef ref = new FieldRef(type, name);
+        fields.add(ref);
+        return ref;
+    }
+
+    public MethodRef addMethod(String body, TypeRef returnType, String name, ParameterRef... parameters) {
+        MethodRef ref = new MethodRef(returnType, name, parameters, body);
+        methods.add(ref);
+        return ref;
+    }
+
+    public void write(PrintWriter writer) {
+        writer.println("package " + packageName + ";");
+        writer.println();
+        for (TypeRef i : imports) {
+            if (i.isPrimitive()) {
+                continue;
+            }
+            writer.println("import " + i.canonicalName() + ";");
+        }
+        writer.println();
+        writer.println("public class " + className + " extends " + extendsClass + " {");
+        for (FieldRef field : fields) {
+            writer.println("    private final " + field.klass.name + " " + field.name + ";");
+        }
+
+        for (MethodRef method : methods) {
+            write(writer, method);
+        }
+
+        writer.println("}");
+    }
+
+    private void write(PrintWriter writer, MethodRef method) {
+        String returnString;
+        if (method.returnType == TypeRef.VOID) {
+            returnString = "void";
+        } else {
+            returnString = method.returnType.name;
+        }
+
+        List<String> parameters = new ArrayList<>();
+        for (ParameterRef p : method.parameters) {
+            parameters.add(p.klass.name + " " + p.name);
+        }
+
+        writer.println("    public " + returnString + " " + method.name + "(" + collectionToDelimitedString(parameters, ", ") + ") {");
+        writer.println(method.body);
+        writer.println("    }");
+    }
+
+    public void simpleConstructor(List<ParameterRef> parameters, List<String> goesToSuper) {
+        List<String> ps = new ArrayList<>();
+        for (ParameterRef p : parameters) {
+            ps.add(p.klass.name + " " + p.name);
+        }
+        List<String> ss = new ArrayList<>();
+        List<String> local = new ArrayList<>();
+        for (String s : goesToSuper) {
+            for (ParameterRef parameter : parameters) {
+                if (parameter.name.equals(s)) {
+                    ss.add(parameter.name);
+                    continue;
+                }
+            }
+            local.add(s);
+        }
+        String params = ps.size() == 0 ? "" : ", " + collectionToDelimitedString(ps, ", ");
+
+        CharArrayWriter buffer = new CharArrayWriter();
+        PrintWriter writer = new PrintWriter(buffer);
+
+        writer.println("    public " + className + "(" + params + ") {");
+        writer.println("        super(" + collectionToDelimitedString(ss, ", ") + ");");
+//        writer.println("        this.transactionManager = _transactionManager_;");
+        for (String s : local) {
+            writer.println("        this." + s + " = " + s);
+        }
+        writer.println("    }");
+    }
+}
diff --git a/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/FieldRef.java b/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/FieldRef.java
new file mode 100644
index 0000000..29a2c51
--- /dev/null
+++ b/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/FieldRef.java
@@ -0,0 +1,31 @@
+package io.trygvis.container.compiler.model;
+
+public class FieldRef implements Comparable<FieldRef> {
+    public final TypeRef klass;
+    public final String name;
+
+    public FieldRef(TypeRef klass, String name) {
+        this.klass = klass;
+        this.name = name;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof FieldRef)) return false;
+
+        FieldRef fieldRef = (FieldRef) o;
+
+        return name.equals(fieldRef.name);
+    }
+
+    @Override
+    public int hashCode() {
+        return name.hashCode();
+    }
+
+    @Override
+    public int compareTo(FieldRef o) {
+        return name.compareTo(o.name);
+    }
+}
diff --git a/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/MethodRef.java b/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/MethodRef.java
new file mode 100644
index 0000000..0b2cf89
--- /dev/null
+++ b/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/MethodRef.java
@@ -0,0 +1,16 @@
+package io.trygvis.container.compiler.model;
+
+public class MethodRef {
+    public final TypeRef returnType;
+    public final String name;
+    public final ParameterRef[] parameters;
+    public final String body;
+
+    public
+    MethodRef(TypeRef returnType, String name, ParameterRef[] parameters, String body) {
+        this.returnType = returnType;
+        this.name = name;
+        this.parameters = parameters;
+        this.body = body;
+    }
+}
diff --git a/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/ParameterRef.java b/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/ParameterRef.java
new file mode 100644
index 0000000..fc69cb1
--- /dev/null
+++ b/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/ParameterRef.java
@@ -0,0 +1,11 @@
+package io.trygvis.container.compiler.model;
+
+public class ParameterRef {
+    public final TypeRef klass;
+    public final String name;
+
+    public ParameterRef(TypeRef klass, String name) {
+        this.klass = klass;
+        this.name = name;
+    }
+}
diff --git a/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/TypeRef.java b/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/TypeRef.java
new file mode 100644
index 0000000..aabfb45
--- /dev/null
+++ b/container-compiler-plugin/src/main/java/io/trygvis/container/compiler/model/TypeRef.java
@@ -0,0 +1,83 @@
+package io.trygvis.container.compiler.model;
+
+import javax.lang.model.type.TypeKind;
+
+public class TypeRef implements Comparable<TypeRef> {
+
+    public static final TypeRef VOID = new TypeRef("void", "void");
+    public static final TypeRef BOOLEAN = new TypeRef("boolean", null);
+    public static final TypeRef BYTE = new TypeRef("byte", null);
+    public static final TypeRef SHORT = new TypeRef("short", null);
+    public static final TypeRef CHAR = new TypeRef("char", null);
+    public static final TypeRef INT = new TypeRef("int", null);
+    public static final TypeRef LONG = new TypeRef("long", null);
+    public static final TypeRef FLOAT = new TypeRef("float", null);
+    public static final TypeRef DOUBLE = new TypeRef("double", null);
+
+    /**
+     * The name of a class used within a class file. Is either the simple name or the canonical name.
+     */
+    public final String name;
+
+    private final String canonicalName;
+
+    public String canonicalName() {
+        if (canonicalName == null) {
+            throw new RuntimeException("This type doesn't have a canonical name");
+        }
+
+        return canonicalName;
+    }
+
+    public boolean isPrimitive() {
+        return canonicalName == null;
+    }
+
+    public TypeRef(String name, String canonicalName) {
+        this.name = name;
+        this.canonicalName = canonicalName;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof TypeRef)) return false;
+
+        TypeRef classRef = (TypeRef) o;
+
+        return canonicalName.equals(classRef.canonicalName);
+    }
+
+    @Override
+    public int hashCode() {
+        return canonicalName.hashCode();
+    }
+
+    @Override
+    public int compareTo(TypeRef o) {
+        return canonicalName.compareTo(o.canonicalName);
+    }
+
+    public static TypeRef find(TypeKind kind) {
+        switch (kind) {
+            case BOOLEAN:
+                return BOOLEAN;
+            case BYTE:
+                return BYTE;
+            case SHORT:
+                return SHORT;
+            case CHAR:
+                return CHAR;
+            case INT:
+                return INT;
+            case LONG:
+                return LONG;
+            case FLOAT:
+                return FLOAT;
+            case DOUBLE:
+                return DOUBLE;
+        }
+
+        throw new RuntimeException("Unknown kind: " + kind);
+    }
+}
diff --git a/container-core/pom.xml b/container-core/pom.xml
new file mode 100644
index 0000000..e16c761
--- /dev/null
+++ b/container-core/pom.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <artifactId>container-playground</artifactId>
+    <groupId>io.trygvis.container</groupId>
+    <version>1.0-SNAPSHOT</version>
+  </parent>
+  <artifactId>container-core</artifactId>
+  <properties>
+    <version.spring>3.2.2.RELEASE</version.spring>
+  </properties>
+  <dependencies>
+    <dependency>
+      <groupId>org.springframework</groupId>
+      <artifactId>spring-beans</artifactId>
+      <version>${version.spring}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.springframework</groupId>
+      <artifactId>spring-jdbc</artifactId>
+      <version>${version.spring}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.springframework</groupId>
+      <artifactId>spring-tx</artifactId>
+      <version>${version.spring}</version>
+    </dependency>
+  </dependencies>
+</project>
diff --git a/container-core/src/main/java/io/trygvis/container/log/Log.java b/container-core/src/main/java/io/trygvis/container/log/Log.java
new file mode 100644
index 0000000..71e81d1
--- /dev/null
+++ b/container-core/src/main/java/io/trygvis/container/log/Log.java
@@ -0,0 +1,4 @@
+package io.trygvis.container.log;
+
+public @interface Log {
+}
diff --git a/container-core/src/main/java/io/trygvis/container/tx/PlatformTransactionManager.java b/container-core/src/main/java/io/trygvis/container/tx/PlatformTransactionManager.java
new file mode 100644
index 0000000..3ab7b6f
--- /dev/null
+++ b/container-core/src/main/java/io/trygvis/container/tx/PlatformTransactionManager.java
@@ -0,0 +1,188 @@
+package io.trygvis.container.tx;
+
+public class PlatformTransactionManager {
+
+    public static Tx currentTx() {
+        return tx.get().tx();
+    }
+
+    public static interface TxFactory {
+        Tx create(TransactionIsolation isolation);
+    }
+
+    static final ThreadLocal<TxEntry> tx = new ThreadLocal<TxEntry>() {
+        @Override
+        protected TxEntry initialValue() {
+            return new RootTxState();
+        }
+    };
+
+    public abstract static class TxEntry {
+        abstract Tx tx();
+
+        abstract boolean isActive();
+
+        abstract TxEntry pop();
+    }
+
+    public static class NewTxTxEntry extends TxEntry {
+        private final TxEntry parent;
+        private final Tx tx;
+
+        public NewTxTxEntry(TxEntry parent, Tx tx) {
+            this.parent = parent;
+            this.tx = tx;
+        }
+
+        @Override
+        Tx tx() {
+            return tx;
+        }
+
+        public boolean isActive() {
+            return true;
+        }
+
+        @Override
+        TxEntry pop() {
+            return parent;
+        }
+    }
+
+    public static class NestedTxEntry extends TxEntry {
+        private final NestedTxEntry parent;
+
+        public NestedTxEntry(NestedTxEntry parent) {
+            this.parent = parent;
+        }
+
+        @Override
+        Tx tx() {
+            return parent.tx();
+        }
+
+        public boolean isActive() {
+            return parent.isActive();
+        }
+
+        @Override
+        TxEntry pop() {
+            return parent;
+        }
+    }
+
+    private final static class InactiveTxEntry extends TxEntry {
+        private final TxEntry parent;
+
+        private InactiveTxEntry(TxEntry parent) {
+            this.parent = parent;
+        }
+
+        @Override
+        public Tx tx() {
+            throw new RuntimeException("No transaction currently running.");
+        }
+
+        @Override
+        public boolean isActive() {
+            return false;
+        }
+
+        @Override
+        TxEntry pop() {
+            return parent;
+        }
+    }
+
+    private final static class RootTxState extends TxEntry {
+        @Override
+        public Tx tx() {
+            throw new RuntimeException("No transaction currently running.");
+        }
+
+        @Override
+        public boolean isActive() {
+            return false;
+        }
+
+        @Override
+        TxEntry pop() {
+            throw new RuntimeException("Trying to pop root entry");
+        }
+    }
+
+    public enum TransactionIsolation {
+        ISOLATION_DEFAULT,
+        ISOLATION_READ_COMMITTED,
+        ISOLATION_READ_UNCOMMITTED,
+        ISOLATION_REPEATABLE_READ,
+        ISOLATION_SERIALIZABLE
+    }
+
+    public enum TransactionPropagation {
+        PROPAGATION_NESTED,
+        //        PROPAGATION_NEVER,
+        PROPAGATION_NOT_SUPPORTED,
+        PROPAGATION_REQUIRED,
+        PROPAGATION_REQUIRES_NEW,
+        PROPAGATION_SUPPORTS
+    }
+
+    private final TxFactory txFactory;
+    private final TransactionPropagation defaultPropagation;
+
+    public PlatformTransactionManager(TxFactory txFactory, TransactionPropagation defaultPropagation) {
+        this.txFactory = txFactory;
+        this.defaultPropagation = defaultPropagation;
+    }
+
+    public <T> T doInTransaction(TransactionIsolation isolation, TransactionPropagation propagation, TransactionTemplate<T> transactionTemplate) {
+        final TxEntry prevEntry = PlatformTransactionManager.tx.get();
+        final TxEntry currentEntry = nextTxEntry(prevEntry, isolation, propagation);
+        PlatformTransactionManager.tx.set(currentEntry);
+
+        try {
+            return transactionTemplate.doInTransaction();
+        } finally {
+            PlatformTransactionManager.tx.set(prevEntry);
+        }
+    }
+
+    private TxEntry nextTxEntry(TxEntry prevEntry, TransactionIsolation isolation, TransactionPropagation propagation) {
+        TxEntry currentEntry;
+        switch (propagation) {
+            case PROPAGATION_NESTED:
+                throw new RuntimeException("Propagation 'nested' not supported.");
+            case PROPAGATION_NOT_SUPPORTED:
+                currentEntry = new InactiveTxEntry(prevEntry);
+                PlatformTransactionManager.tx.set(currentEntry);
+                break;
+            default:
+                throw new RuntimeException("Unknown transaction propagation: " + propagation);
+            case PROPAGATION_REQUIRED:
+                if (prevEntry.isActive()) {
+                    currentEntry = new NestedTxEntry((NestedTxEntry) prevEntry);
+                } else {
+                    Tx tx = txFactory.create(isolation);
+                    currentEntry = new NewTxTxEntry(prevEntry, tx);
+                }
+                break;
+            case PROPAGATION_REQUIRES_NEW:
+                Tx tx = txFactory.create(isolation);
+                currentEntry = new NewTxTxEntry(prevEntry, tx);
+                break;
+            case PROPAGATION_SUPPORTS:
+                if (prevEntry.isActive()) {
+                    currentEntry = new NestedTxEntry((NestedTxEntry) prevEntry);
+                } else {
+                    currentEntry = new InactiveTxEntry(prevEntry);
+                }
+                break;
+        }
+        return currentEntry;
+    }
+
+    public interface TransactionTemplate<T> {
+        T doInTransaction();
+    }
+}
diff --git a/container-core/src/main/java/io/trygvis/container/tx/TransactionHolder.java b/container-core/src/main/java/io/trygvis/container/tx/TransactionHolder.java
new file mode 100644
index 0000000..9f7e441
--- /dev/null
+++ b/container-core/src/main/java/io/trygvis/container/tx/TransactionHolder.java
@@ -0,0 +1,7 @@
+package io.trygvis.container.tx;
+
+public class TransactionHolder {
+    public static Tx currentTx() {
+        return PlatformTransactionManager.currentTx();
+    }
+}
diff --git a/container-core/src/main/java/io/trygvis/container/tx/Tx.java b/container-core/src/main/java/io/trygvis/container/tx/Tx.java
new file mode 100644
index 0000000..8ff9d05
--- /dev/null
+++ b/container-core/src/main/java/io/trygvis/container/tx/Tx.java
@@ -0,0 +1,5 @@
+package io.trygvis.container.tx;
+
+public interface Tx {
+    void rollback();
+}
diff --git a/myapp/pom.xml b/myapp/pom.xml
new file mode 100644
index 0000000..7253422
--- /dev/null
+++ b/myapp/pom.xml
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <artifactId>container-playground</artifactId>
+    <groupId>io.trygvis.container</groupId>
+    <version>1.0-SNAPSHOT</version>
+  </parent>
+  <artifactId>myapp</artifactId>
+  <dependencies>
+    <dependency>
+      <groupId>io.trygvis.container</groupId>
+      <artifactId>container-core</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>io.trygvis.container</groupId>
+      <artifactId>container-compiler-plugin</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+  </dependencies>
+  <build>
+    <plugins>
+      <plugin>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <configuration>
+          <compilerArguments>
+            <processor>io.trygvis.container.compiler.MyProcessor</processor>
+          </compilerArguments>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+</project>
diff --git a/myapp/src/main/java/io/trygvis/container/myapp/MyComponent.java b/myapp/src/main/java/io/trygvis/container/myapp/MyComponent.java
new file mode 100644
index 0000000..cf30c3b
--- /dev/null
+++ b/myapp/src/main/java/io/trygvis/container/myapp/MyComponent.java
@@ -0,0 +1,40 @@
+package io.trygvis.container.myapp;
+
+import io.trygvis.container.log.Log;
+import io.trygvis.container.tx.Tx;
+import org.springframework.transaction.annotation.Transactional;
+
+import static io.trygvis.container.tx.TransactionHolder.currentTx;
+
+@Transactional
+@Log
+public class MyComponent {
+    private final String myString = "123";
+    private String myVar;
+
+    public static class Person {
+        public final String name;
+
+        public Person(String name) {
+            this.name = name;
+        }
+    }
+
+    protected MyComponent() {
+    }
+
+    public MyComponent(String myVar) {
+        this.myVar = myVar;
+    }
+
+    public void doProcessing(int x) {
+        Tx tx = currentTx();
+    }
+
+    public Person addPerson(String name) {
+        return new Person(name);
+    }
+
+    public void deletePerson(int a, int b) {
+    }
+}
diff --git a/myapp/src/main/java/io/trygvis/container/myapp/MyComponent_Tx.java b/myapp/src/main/java/io/trygvis/container/myapp/MyComponent_Tx.java
new file mode 100644
index 0000000..445d236
--- /dev/null
+++ b/myapp/src/main/java/io/trygvis/container/myapp/MyComponent_Tx.java
@@ -0,0 +1,26 @@
+package io.trygvis.container.myapp;
+
+import io.trygvis.container.tx.PlatformTransactionManager;
+
+public class MyComponent_Tx extends MyComponent {
+    private final PlatformTransactionManager transactionManager;
+    private final MyComponent target;
+
+    public MyComponent_Tx(PlatformTransactionManager tm) {
+        this.transactionManager = tm;
+        this.target = new MyComponent();
+    }
+
+    public void doProcessing(final int x) {
+        transactionManager.doInTransaction(
+                PlatformTransactionManager.TransactionIsolation.ISOLATION_DEFAULT,
+                PlatformTransactionManager.TransactionPropagation.PROPAGATION_REQUIRED,
+                new PlatformTransactionManager.TransactionTemplate<Object>() {
+                    @Override
+                    public Object doInTransaction() {
+                        target.doProcessing(x);
+                        return null;
+                    }
+                });
+    }
+}
diff --git a/myapp/src/main/java/io/trygvis/container/myapp/MyMain.java b/myapp/src/main/java/io/trygvis/container/myapp/MyMain.java
new file mode 100644
index 0000000..a54e486
--- /dev/null
+++ b/myapp/src/main/java/io/trygvis/container/myapp/MyMain.java
@@ -0,0 +1,10 @@
+package io.trygvis.container.myapp;
+
+import org.springframework.transaction.annotation.Transactional;
+
+public class MyMain {
+
+    public static void main(String[] args) {
+        System.out.println("io.trygvis.container.myapp.MyMain.main");
+    }
+}
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..9997562
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <packaging>pom</packaging>
+  <parent>
+    <groupId>io.trygvis</groupId>
+    <artifactId>trygvis-parent</artifactId>
+    <version>1</version>
+  </parent>
+  <groupId>io.trygvis.container</groupId>
+  <artifactId>container-playground</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <build>
+    <plugins>
+      <plugin>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <configuration>
+          <source>1.7</source>
+          <target>1.7</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <modules>
+    <module>container-compiler-plugin</module>
+    <module>myapp</module>
+    <module>container-core</module>
+  </modules>
+</project>