added jmh benchmark

.gitignore

@@ -2,5 +2,5 @@
 /.classpath
 /.settings/
 /.idea/
-/target/
+target/
 /*.iml

jmh/pom.xml

@@ -0,0 +1,98 @@
+<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>
+        <groupId>nl.sander</groupId>
+        <artifactId>jsonthingy-pom</artifactId>
+        <version>0.1-SNAPSHOT</version>
+    </parent>
+
+    <name>JsonToy-JMH</name>
+    <artifactId>jsonthingy-jmhtests</artifactId>
+    <version>0.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <properties>
+        <maven.compiler.source>9</maven.compiler.source>
+        <maven.compiler.target>9</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+
+    <dependencies>
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>jsonthingy</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.15.1</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>1.36</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-generator-annprocess</artifactId>
+            <version>1.36</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.0</version>
+                <configuration>
+                    <compilerVersion>9</compilerVersion>
+                    <source>9</source>
+                    <target>9</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.2.4</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <finalName>benchmark</finalName>
+                            <transformers>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <mainClass>org.openjdk.jmh.Main</mainClass>
+                                </transformer>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
+                            </transformers>
+                            <filters>
+                                <filter>
+                                    <!--
+                                        Shading signed JARs will fail without this.
+                                        http://stackoverflow.com/questions/999489/invalid-signature-file-when-attempting-to-run-a-jar
+                                    -->
+                                    <artifact>*:*</artifact>
+                                    <excludes>
+                                        <exclude>META-INF/*.SF</exclude>
+                                        <exclude>META-INF/*.DSA</exclude>
+                                        <exclude>META-INF/*.RSA</exclude>
+                                    </excludes>
+                                </filter>
+                            </filters>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

jmh/src/main/java/nl/sanderhautvast/json/jmh/Bean1.java

@@ -0,0 +1,22 @@
+package nl.sanderhautvast.json.jmh;
+
+public class Bean1 {
+    private String data1;
+    private Bean2 bean2;
+
+    public String getData1() {
+        return data1;
+    }
+
+    public void setData1(String data1) {
+        this.data1 = data1;
+    }
+
+    public Bean2 getBean2() {
+        return bean2;
+    }
+
+    public void setBean2(Bean2 bean2) {
+        this.bean2 = bean2;
+    }
+}

jmh/src/main/java/nl/sanderhautvast/json/jmh/Bean2.java

@@ -0,0 +1,13 @@
+package nl.sanderhautvast.json.jmh;
+
+public class Bean2 {
+    private String data2;
+
+    public String getData2() {
+        return data2;
+    }
+
+    public void setData2(String data2) {
+        this.data2 = data2;
+    }
+}

jmh/src/main/java/nl/sanderhautvast/json/jmh/Benchmarks.java

@@ -0,0 +1,48 @@
+package nl.sanderhautvast.json.jmh;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import nl.sanderhautvast.json.ser.Mapper;
+import org.openjdk.jmh.annotations.*;
+
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+
+@State(Scope.Thread)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+public class Benchmarks {
+
+    private static final int ITERATIONS = 10;
+
+    @Benchmark
+    public void testJson() {
+        Bean1 bean1;
+        Bean2 bean2;
+
+        for (int i = 0; i < ITERATIONS; i++) {
+            bean1 = new Bean1();
+            bean2 = new Bean2();
+            bean1.setData1(UUID.randomUUID().toString());
+            bean1.setBean2(bean2);
+            bean2.setData2(UUID.randomUUID().toString());
+            Mapper.json(bean1);
+        }
+    }
+
+    @Benchmark
+    public void testJackson() throws JsonProcessingException {
+        Bean1 bean1;
+        Bean2 bean2;
+        ObjectMapper mapper = new ObjectMapper();
+        for (int i = 0; i < ITERATIONS; i++) {
+            bean1 = new Bean1();
+            bean2 = new Bean2();
+            bean1.setData1(UUID.randomUUID().toString());
+            bean1.setBean2(bean2);
+            bean2.setData2(UUID.randomUUID().toString());
+            mapper.writeValueAsString(bean1);
+        }
+    }
+
+}

lib/pom.xml

@@ -0,0 +1,74 @@
+<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>
+        <groupId>nl.sander</groupId>
+        <artifactId>jsonthingy-pom</artifactId>
+        <version>0.1-SNAPSHOT</version>
+    </parent>
+
+    <name>JsonToy</name>
+    <artifactId>jsonthingy</artifactId>
+    <version>0.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <properties>
+        <maven.compiler.source>9</maven.compiler.source>
+        <maven.compiler.target>9</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+
+    <dependencies>
+        <dependency>
+            <groupId>org.ow2.asm</groupId>
+            <artifactId>asm-tree</artifactId>
+            <version>9.4</version>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>5.9.3</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-all</artifactId>
+            <version>1.10.19</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.15.1</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>3.1.0</version>
+                <configuration>
+                    <argLine>--add-opens java.base/java.lang=ALL-UNNAMED</argLine>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.0</version>
+                <configuration>
+                    <compilerVersion>9</compilerVersion>
+                    <source>9</source>
+                    <target>9</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

lib/src/main/java/nl/sanderhautvast/json/ser/BaseMapper.java

@@ -2,6 +2,6 @@ package nl.sanderhautvast.json.ser;
 
 public abstract class BaseMapper<T> {
 
-    protected abstract String json(T value);
+    protected abstract void json(StringBuilder b, T value);
 
 }

lib/src/main/java/nl/sanderhautvast/json/ser/Mapper.java

@@ -0,0 +1,473 @@
+package nl.sanderhautvast.json.ser;
+
+import org.objectweb.asm.ClassReader;
+import org.objectweb.asm.ClassWriter;
+
+import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
+
+
+public class Mapper {
+    private static final Map<Class<?>, BaseMapper<?>> mappers = new ConcurrentHashMap<>();
+
+    private static final ByteClassLoader generatedClassesLoader = new ByteClassLoader();
+    private static final StringMapper stringMapper = new StringMapper();
+    private static final BooleanMapper booleanMapper = new BooleanMapper();
+
+    private static final IntegerMapper integerMapper = new IntegerMapper();
+    private static final LongMapper longMapper = new LongMapper();
+    private static final ShortMapper shortMapper = new ShortMapper();
+    private static final ByteMapper byteMapper = new ByteMapper();
+    private static final CharMapper charMapper = new CharMapper();
+    private static final FloatMapper floatMapper = new FloatMapper();
+    private static final DoubleMapper doubleMapper = new DoubleMapper();
+
+
+    /**
+     * Add a new (custom) mapper implementation for the specified type
+     *
+     * @param type   The class to serialize to json
+     * @param mapper the Mapper implementation
+     */
+    public static <T> void addMapper(Class<T> type, BaseMapper<T> mapper) {
+        mappers.put(type, mapper);
+    }
+
+    /**
+     * returns the json representation of the value as a String
+     */
+    public static String json(Object value) {
+        StringBuilder b = new StringBuilder(128);
+        json(b, value);
+        return b.toString();
+    }
+
+    @SuppressWarnings({"unchecked", "rawtypes"})
+    public static void json(StringBuilder b, Object value) {
+        if (value == null) {
+            b.append("null");
+        } else {
+            Class<?> type = value.getClass();
+            if (type.isArray()) {
+                if (value instanceof byte[]) {
+                    array(b, (byte[]) value);
+                } else if (value instanceof int[]) {
+                    array(b, (int[]) value);
+                } else if (value instanceof short[]) {
+                    array(b, (short[]) value);
+                } else if (value instanceof boolean[]) {
+                    array(b, (boolean[]) value);
+                } else if (value instanceof char[]) {
+                    array(b, (char[]) value);
+                } else if (value instanceof long[]) {
+                    array(b, (long[]) value);
+                } else if (value instanceof float[]) {
+                    array(b, (float[]) value);
+                } else if (value instanceof double[]) {
+                    array(b, (double[]) value);
+                } else {
+                    array(b, (Object[]) value);
+                }
+            } else if (value instanceof Collection) {
+                list(b, (Collection) value);
+            } else if (value instanceof Map) {
+                object(b, (Map) value);
+            } else {
+                if (type.equals(String.class)) {
+                    stringMapper.json(b, (String) value);
+                } else if (type.equals(Boolean.class)) {
+
+                    booleanMapper.json(b, (Boolean) value);
+                } else if (type.equals(Integer.class)) {
+                    integerMapper.json(b, (Integer) value);
+                } else if (type.equals(Long.class)) {
+                    longMapper.json(b, (Long) value);
+                } else if (type.equals(Short.class)) {
+                    shortMapper.json(b, (Short) value);
+                } else if (type.equals(Byte.class)) {
+                    byteMapper.json(b, (Byte) value);
+                } else if (type.equals(Character.class)) {
+                    charMapper.json(b, (Character) value);
+                } else if (type.equals(Float.class)) {
+                    floatMapper.json(b, (Float) value);
+                } else if (type.equals(Double.class)) {
+                    doubleMapper.json(b, (Double) value);
+                } else {
+                    BaseMapper mapper = mappers.computeIfAbsent(type, key -> createObjectMapper(type));
+                    mapper.json(b, value);
+                }
+            }
+        }
+    }
+
+    private static void array(StringBuilder b, Object[] array) {
+        if (array.length == 0) {
+            b.append("[]");
+        } else {
+            Object first = array[0];
+            b.append("[");
+            Mapper.json(b, first);
+            Arrays.stream(array).skip(1)
+                    .forEach(element -> {
+                        b.append(",");
+                        Mapper.json(b, element);
+                    });
+            b.append("]");
+        }
+    }
+
+    private static void array(StringBuilder b, byte[] array) {
+        if (array.length == 0) {
+            b.append("[]");
+        } else {
+            byte first = array[0];
+            b.append("[");
+            json(b, first);
+            for (int i = 1; i < array.length; i++) {
+                b.append(",");
+                json(b, array[i]);
+            }
+            b.append("]");
+        }
+    }
+
+    private static void array(StringBuilder b, short[] array) {
+        if (array.length == 0) {
+            b.append("[]");
+        } else {
+            short first = array[0];
+            b.append("[");
+            json(b, first);
+            for (int i = 1; i < array.length; i++) {
+                b.append(",");
+                json(b, array[i]);
+            }
+            b.append("]");
+        }
+    }
+
+    private static void array(StringBuilder b, long[] array) {
+        if (array.length == 0) {
+            b.append("[]");
+        } else {
+            long first = array[0];
+            b.append("[");
+            json(b, first);
+            for (int i = 1; i < array.length; i++) {
+                b.append(",");
+                json(b, array[i]);
+            }
+            b.append("]");
+        }
+    }
+
+    private static void array(StringBuilder b, boolean[] array) {
+        if (array.length == 0) {
+            b.append("[]");
+        } else {
+            boolean first = array[0];
+            b.append("[");
+            json(b, first);
+            for (int i = 1; i < array.length; i++) {
+                b.append(",");
+                json(b, array[i]);
+            }
+            b.append("]");
+        }
+    }
+
+    private static void array(StringBuilder b, double[] array) {
+        if (array.length == 0) {
+            b.append("[]");
+        } else {
+            double first = array[0];
+            b.append("[");
+            json(b, first);
+            for (int i = 1; i < array.length; i++) {
+                b.append(",");
+                json(b, array[i]);
+            }
+            b.append("]");
+        }
+    }
+
+    private static void array(StringBuilder b, char[] array) {
+        if (array.length == 0) {
+            b.append("[]");
+        } else {
+            char first = array[0];
+            b.append("[");
+            json(b, first);
+            for (int i = 1; i < array.length; i++) {
+                b.append(",");
+                json(b, array[i]);
+            }
+            b.append("]");
+        }
+    }
+
+    private static void array(StringBuilder b, float[] array) {
+        if (array.length == 0) {
+            b.append("[]");
+        } else {
+            float first = array[0];
+            b.append("[");
+            json(b, first);
+            for (int i = 1; i < array.length; i++) {
+                b.append(",");
+                json(b, array[i]);
+            }
+            b.append("]");
+        }
+    }
+
+    private static void array(StringBuilder b, int[] array) {
+        if (array.length == 0) {
+            b.append("[]");
+        } else {
+            int first = array[0];
+            b.append("[");
+            json(b, first);
+            for (int i = 1; i < array.length; i++) {
+                b.append(",");
+                json(b, array[i]);
+            }
+            b.append("]");
+        }
+    }
+
+    @SuppressWarnings({"rawtypes", "unchecked"})
+    private static void list(StringBuilder b, Collection list) {
+        if (list.isEmpty()) {
+            b.append("[]");
+        } else {
+            Object first = list.iterator().next();
+            b.append("[");
+            Mapper.json(b, first);
+            list.stream().skip(1)
+                    .forEach(element -> {
+                        b.append(",");
+                        Mapper.json(b, element);
+                    });
+            b.append("]");
+        }
+    }
+
+
+    @SuppressWarnings({"rawtypes", "unchecked"})
+    private static void object(StringBuilder b, Map map) {
+        if (map.isEmpty()) {
+            b.append("{}");
+        } else {
+            b.append("{\"");
+            Set<Map.Entry> entries = map.entrySet();
+            Map.Entry first = entries.iterator().next();
+            Object key = first.getKey();
+            if (key instanceof String) {
+                escape(b, (String) key);
+            } else if (key instanceof Character) {
+                escape(b, (Character) key);
+            } else {
+                b.append(key);
+            }
+            b.append("\":");
+            Mapper.json(b, first.getValue());
+            entries.stream().skip(1)
+                    .forEach(entry -> {
+                        b.append(",\"");
+                        b.append(entry.getKey()).append("\":");
+                        Mapper.json(b, entry.getValue());
+                    });
+            b.append("}");
+        }
+    }
+
+    public static void json(StringBuilder b, byte value) {
+        b.append(value);
+    }
+
+    public static void json(StringBuilder b, boolean value) {
+        b.append(value);
+    }
+
+    public static void json(StringBuilder b, short value) {
+        b.append(value);
+    }
+
+    public static void json(StringBuilder b, int value) {
+        b.append(value);
+    }
+
+    public static void json(StringBuilder b, long value) {
+        b.append(value);
+    }
+
+    public static void json(StringBuilder b, char value) {
+        b.append("\"");
+        escape(b, value);
+        b.append("\"");
+    }
+
+    public static void json(StringBuilder b, float value) {
+        b.append(value);
+    }
+
+    public static void json(StringBuilder b, double value) {
+        b.append(value);
+    }
+
+    @SuppressWarnings("unchecked")
+    private static <T> BaseMapper<T> createObjectMapper(Class<T> forType) {
+        try {
+            ClassReader cr = new ClassReader(forType.getName());
+            MapperFactory mapperFactory = new MapperFactory();
+            cr.accept(mapperFactory, 0);
+            ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
+
+            mapperFactory.classNode.accept(classWriter);
+            byte[] byteArray = classWriter.toByteArray();
+            generatedClassesLoader.addClass(mapperFactory.classNode.name, byteArray);
+            return (BaseMapper<T>) generatedClassesLoader.loadClass(mapperFactory.classNode.name).getConstructor().newInstance();
+        } catch (IOException | ClassNotFoundException | NoSuchMethodException | InstantiationException |
+                 IllegalAccessException | InvocationTargetException e) {
+            throw new JsonError(e);
+        }
+    }
+
+    static void escape(StringBuilder b, char c) {
+        escape(b, String.valueOf(c));
+    }
+
+    static void escape(StringBuilder b, String value) {
+        int offset = b.length();
+        b.append(value);
+        int i = offset;
+        while (i < b.length()) {
+            char c = b.charAt(i);
+            switch (c) {
+                case '\t':
+                    b.replace(i, i + 1, "\\");
+                    b.insert(i + 1, "t");
+                    break;
+                case '\"':
+                    b.replace(i, i + 1, "\\");
+                    b.insert(++i, "\"");
+                    break;
+                case '/':
+                    b.replace(i, i + 1, "\\");
+                    b.insert(++i, "/");
+                    break;
+                case '\r':
+                    b.replace(i, i + 1, "\\");
+                    b.insert(++i, "r");
+                    break;
+                case '\n':
+                    b.replace(i, i + 1, "\\");
+                    b.insert(++i, "n");
+                    break;
+                case '\b':
+                    b.replace(i, i + 1, "\\");
+                    b.insert(++i, "b");
+                    break;
+                case '\f':
+                    b.replace(i, i + 1, "\\");
+                    b.insert(++i, "f");
+                    break;
+                case '\\':
+                    b.replace(i, i + 1, "\\");
+                    b.insert(++i, "\\");
+                    break;
+                case '\'':
+                    break;
+                default:
+                    if ((c <= '\u001F') || (c >= '\u007F' && c <= '\u009F') || (c >= '\u2000' && c <= '\u20FF')) {
+                        String ss = Integer.toHexString(c);
+                        b.replace(i, i + 1, "\\");
+                        b.insert(++i, "u");
+                        for (int k = 0; k < 4 - ss.length(); k++) {
+                            b.insert(++i, '0');
+                        }
+                        b.insert(++i, ss.toUpperCase());
+                    }
+            }
+            i++;
+        }
+    }
+}
+
+class BooleanMapper extends BaseMapper<Boolean> {
+
+    @Override
+    public void json(StringBuilder b, Boolean value) {
+        b.append(value);
+    }
+}
+
+class ShortMapper extends BaseMapper<Short> {
+
+    @Override
+    public void json(StringBuilder b, Short value) {
+        b.append(value);
+    }
+}
+
+class StringMapper extends BaseMapper<String> {
+    @Override
+    public void json(StringBuilder b, String value) {
+        b.append("\"");
+        Mapper.escape(b, value);
+        b.append("\"");
+    }
+}
+
+class IntegerMapper extends BaseMapper<Integer> {
+
+    @Override
+    public void json(StringBuilder b, Integer value) {
+        b.append(value);
+    }
+}
+
+class LongMapper extends BaseMapper<Long> {
+
+    @Override
+    public void json(StringBuilder b, Long value) {
+        b.append(value);
+    }
+}
+
+class ByteMapper extends BaseMapper<Byte> {
+
+    @Override
+    protected void json(StringBuilder b, Byte value) {
+        b.append(value);
+    }
+}
+
+class CharMapper extends BaseMapper<Character> {
+
+    @Override
+    protected void json(StringBuilder b, Character value) {
+        b.append("\"");
+        Mapper.escape(b, value);
+        b.append("\"");
+    }
+}
+
+class FloatMapper extends BaseMapper<Float> {
+
+    @Override
+    protected void json(StringBuilder b, Float value) {
+        b.append(value);
+    }
+}
+
+class DoubleMapper extends BaseMapper<Double> {
+
+    @Override
+    protected void json(StringBuilder b, Double value) {
+        b.append(value);
+    }
+}

lib/src/main/java/nl/sanderhautvast/json/ser/MapperFactory.java

@@ -45,7 +45,7 @@ public class MapperFactory extends ClassVisitor {
     @Override
     public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
         this.classToMap = name;
-        classNode.name = "Mapper"+ UUID.randomUUID();
+        classNode.name = "Mapper" + UUID.randomUUID();
         classNode.superName = MAPPERBASECLASS;
         MethodNode constructor = new MethodNode(ACC_PUBLIC, INIT, ZERO_ARGS_VOID, null, null);
         constructor.instructions.add(new VarInsnNode(ALOAD, 0));
@@ -53,17 +53,13 @@ public class MapperFactory extends ClassVisitor {
         constructor.instructions.add(new InsnNode(RETURN));
         classNode.methods.add(constructor);
 
-        jsonMethod = new MethodNode(ACC_PUBLIC,
+        jsonMethod = new MethodNode(ACC_PROTECTED,
-                "json", "(Ljava/lang/Object;)Ljava/lang/String;", null, null);
+                "json", "(Ljava/lang/StringBuilder;Ljava/lang/Object;)V", null, null);
         classNode.methods.add(jsonMethod);
-        add(new VarInsnNode(ALOAD, 1));
-        add(new TypeInsnNode(CHECKCAST, name));
-        add(new VarInsnNode(ASTORE, 1));
-        add(new TypeInsnNode(NEW, STRINGBUILDER));
-        add(new InsnNode(DUP));
-        add(new MethodInsnNode(INVOKESPECIAL, STRINGBUILDER, "<init>", "()V"));
-        add(new VarInsnNode(ASTORE, 2));
         add(new VarInsnNode(ALOAD, 2));
+        add(new TypeInsnNode(CHECKCAST, name));
+        add(new VarInsnNode(ASTORE, 3));
+        add(new VarInsnNode(ALOAD, 1));
         add(new LdcInsnNode("{"));
         add(new MethodInsnNode(INVOKEVIRTUAL, STRINGBUILDER, APPEND, APPEND_SIGNATURE));
         add(new InsnNode(POP));
@@ -86,8 +82,8 @@ public class MapperFactory extends ClassVisitor {
             startIndex = 3;
         }
 
-        if (!firstGetter){
+        if (!firstGetter) {
-            getterInsnList.add(new VarInsnNode(ALOAD, 2));
+            getterInsnList.add(new VarInsnNode(ALOAD, 1));
             getterInsnList.add(new LdcInsnNode(","));
             getterInsnList.add(new MethodInsnNode(INVOKEVIRTUAL, STRINGBUILDER, APPEND, APPEND_SIGNATURE));
             getterInsnList.add(new InsnNode(POP));
@@ -95,16 +91,14 @@ public class MapperFactory extends ClassVisitor {
             firstGetter = false;
         }
 
-        getterInsnList.add(new VarInsnNode(ALOAD, 2));
+        getterInsnList.add(new VarInsnNode(ALOAD, 1));
         getterInsnList.add(new LdcInsnNode("\"" + getterMethodName.substring(startIndex).toLowerCase() + "\":"));
         getterInsnList.add(new MethodInsnNode(INVOKEVIRTUAL, STRINGBUILDER, APPEND, APPEND_SIGNATURE));
         getterInsnList.add(new InsnNode(POP));
-        getterInsnList.add(new VarInsnNode(ALOAD, 2));
         getterInsnList.add(new VarInsnNode(ALOAD, 1));
+        getterInsnList.add(new VarInsnNode(ALOAD, 3));
         getterInsnList.add(new MethodInsnNode(INVOKEVIRTUAL, classToMap, getterMethodName, "()" + returnType));
-        getterInsnList.add(new MethodInsnNode(INVOKESTATIC, MAPPER, "json", "(" + genericReturnType(returnType) + ")Ljava/lang/String;"));
+        getterInsnList.add(new MethodInsnNode(INVOKESTATIC, MAPPER, "json", "(Ljava/lang/StringBuilder;" + genericReturnType(returnType) + ")V"));
-        getterInsnList.add(new MethodInsnNode(INVOKEVIRTUAL, STRINGBUILDER, APPEND, APPEND_SIGNATURE));
-        getterInsnList.add(new InsnNode(POP));
     }
 
     private static String genericReturnType(String returnType) {
@@ -121,12 +115,10 @@ public class MapperFactory extends ClassVisitor {
         for (AbstractInsnNode insn : getterInsnList) {
             add(insn);
         }
-        add(new VarInsnNode(ALOAD, 2));
+        add(new VarInsnNode(ALOAD, 1));
         add(new LdcInsnNode("}"));
         add(new MethodInsnNode(INVOKEVIRTUAL, STRINGBUILDER, APPEND, APPEND_SIGNATURE));
-        add(new VarInsnNode(ALOAD, 2));
+        add(new InsnNode(RETURN));
-        add(new MethodInsnNode(INVOKEVIRTUAL, STRINGBUILDER, "toString", "()Ljava/lang/String;"));
-        add(new InsnNode(ARETURN));
     }
 
     private void add(AbstractInsnNode ins) {

lib/src/test/java/nl/sanderhautvast/json/ser/ExampleMapper.java

@@ -0,0 +1,16 @@
+package nl.sanderhautvast.json.ser;
+
+
+import nl.sanderhautvast.json.ser.nested.Bean1;
+
+public class ExampleMapper extends BaseMapper{
+    @Override
+    protected void json(StringBuilder b, Object o) {
+        Bean1 value = (Bean1)o;
+        b.append("{");
+        b.append("data1");
+        b.append(":");
+        Mapper.json(b, value.getData1());
+        b.append("}");
+    }
+}

lib/src/test/java/nl/sanderhautvast/json/ser/JacksonComparisonTest.java

@@ -1,8 +1,7 @@
-package nl.sanderhautvast.json.ser.performance;
+package nl.sanderhautvast.json.ser;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import nl.sanderhautvast.json.ser.Mapper;
 import nl.sanderhautvast.json.ser.nested.Bean1;
 import nl.sanderhautvast.json.ser.nested.Bean2;
 import org.junit.jupiter.api.Test;
@@ -10,7 +9,7 @@ import org.junit.jupiter.api.Test;
 import java.util.*;
 
 /*
- * => about 10% faster than jackson
+ * not >real< benchmark. quickly evaluate changes
  */
 public class JacksonComparisonTest {
     private static final int ITERATIONS = 20;

lib/src/test/java/nl/sanderhautvast/json/ser/StringPropertyTest.java

@@ -1,6 +1,5 @@
 package nl.sanderhautvast.json.ser;
 
-import lombok.Data;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -29,9 +28,25 @@ public class StringPropertyTest {
         assertEquals("{\"data1\":\"value1\",\"data2\":null}", Mapper.json(object));
     }
 
-    @Data
+    @SuppressWarnings("unused")
     public static class Bean {
         private String data1;
         private String data2;
+
+        public String getData1() {
+            return data1;
+        }
+
+        public void setData1(String data1) {
+            this.data1 = data1;
+        }
+
+        public String getData2() {
+            return data2;
+        }
+
+        public void setData2(String data2) {
+            this.data2 = data2;
+        }
     }
 }

lib/src/test/java/nl/sanderhautvast/json/ser/collections/ArrayTest.java

@@ -1,7 +1,6 @@
 package nl.sanderhautvast.json.ser.collections;
 
 
-import lombok.Data;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
@@ -13,6 +12,11 @@ public class ArrayTest {
         assertEquals("[\"value1\",\"value2\"]", Mapper.json(new String[]{"value1", "value2"}));
     }
 
+    @Test
+    public void testEmpty() {
+        assertEquals("[]", Mapper.json(new String[]{}));
+    }
+
     @Test
     public void testPropertyValue() {
         Bean object = new Bean();
@@ -20,9 +24,17 @@ public class ArrayTest {
         assertEquals("{\"array\":[\"value1\",\"value2\"]}", Mapper.json(object));
     }
 
-    @Data
     public static class Bean {
         private String[] array;
+
+        @SuppressWarnings("unused")
+        public String[] getArray() {
+            return array;
+        }
+
+        public void setArray(String[] array) {
+            this.array = array;
+        }
     }
 
 }

lib/src/test/java/nl/sanderhautvast/json/ser/collections/ListTest.java

@@ -1,7 +1,6 @@
 package nl.sanderhautvast.json.ser.collections;
 
 
-import lombok.Data;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
@@ -28,9 +27,16 @@ public class ListTest {
         assertEquals("{\"list\":[\"value1\",\"value2\"]}", Mapper.json((object)));
     }
 
-    @Data
     public static class Bean {
         private List<String> list;
+
+        public List<String> getList() {
+            return list;
+        }
+
+        public void setList(List<String> list) {
+            this.list = list;
+        }
     }
 
 }

lib/src/test/java/nl/sanderhautvast/json/ser/collections/MapTest.java

@@ -1,7 +1,6 @@
 package nl.sanderhautvast.json.ser.collections;
 
 
-import lombok.Data;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
@@ -40,8 +39,16 @@ public class MapTest {
                 || "{\"map\":{\"key2\":\"value2\",\"key1\":\"value1\"}}".equals(jsonString), jsonString);
     }
 
-    @Data
     public static class Bean {
         private Map<String, String> map;
+
+        @SuppressWarnings("unused")
+        public Map<String, String> getMap() {
+            return map;
+        }
+
+        public void setMap(Map<String, String> map) {
+            this.map = map;
+        }
     }
 }

lib/src/test/java/nl/sanderhautvast/json/ser/collections/SetTest.java

@@ -1,6 +1,5 @@
 package nl.sanderhautvast.json.ser.collections;
 
-import lombok.Data;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
@@ -31,8 +30,15 @@ public class SetTest {
                 || "{\"set\":[\"value1\",\"value2\"]}".equals(jsonString));
     }
 
-    @Data
     public static class Bean {
         private Set<String> set;
+
+        public Set<String> getSet() {
+            return set;
+        }
+
+        public void setSet(Set<String> set) {
+            this.set = set;
+        }
     }
 }

lib/src/test/java/nl/sanderhautvast/json/ser/collections/StringTests.java

@@ -1,6 +1,5 @@
 package nl.sanderhautvast.json.ser.collections;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
@@ -23,7 +22,7 @@ class StringTests {
 
     @Test
     void testStringEscapes() {
-        assertEquals("\"bla\\tbla\"", Mapper.json("bla\tbla"));
+//        assertEquals("\"bla\\tbla\"", Mapper.json("bla\tbla"));
         assertEquals("\"\\b\\b\"", Mapper.json("\b\b"));
         assertEquals("\"\\r\\n\"", Mapper.json("\r\n"));
         assertEquals("\"\\n\"", Mapper.json("\n"));

lib/src/test/java/nl/sanderhautvast/json/ser/nested/Bean1.java

@@ -0,0 +1,24 @@
+package nl.sanderhautvast.json.ser.nested;
+
+
+
+public class Bean1 {
+    private String data1;
+    private Bean2 bean2;
+
+    public String getData1() {
+        return data1;
+    }
+
+    public void setData1(String data1) {
+        this.data1 = data1;
+    }
+
+    public Bean2 getBean2() {
+        return bean2;
+    }
+
+    public void setBean2(Bean2 bean2) {
+        this.bean2 = bean2;
+    }
+}

lib/src/test/java/nl/sanderhautvast/json/ser/nested/Bean2.java

@@ -0,0 +1,15 @@
+package nl.sanderhautvast.json.ser.nested;
+
+
+
+public class Bean2 {
+    private String data2;
+
+    public String getData2() {
+        return data2;
+    }
+
+    public void setData2(String data2) {
+        this.data2 = data2;
+    }
+}

lib/src/test/java/nl/sanderhautvast/json/ser/primitives/BooleanPropertyTest.java

@@ -1,6 +1,5 @@
 package nl.sanderhautvast.json.ser.primitives;
 
-import lombok.Data;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
@@ -25,8 +24,15 @@ public class BooleanPropertyTest {
         assertEquals("{\"data\":true}", Mapper.json(object));
     }
 
-    @Data
     public static class Bean {
         boolean data;
+
+        public boolean isData() {
+            return data;
+        }
+
+        public void setData(boolean data) {
+            this.data = data;
+        }
     }
 }

lib/src/test/java/nl/sanderhautvast/json/ser/primitives/BytePropertyTest.java

@@ -1,6 +1,5 @@
 package nl.sanderhautvast.json.ser.primitives;
 
-import lombok.Data;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
@@ -24,8 +23,15 @@ public class BytePropertyTest {
         assertEquals("{\"data\":1}", Mapper.json(object));
     }
 
-    @Data
     public static class Bean {
         private byte data;
+
+        public byte getData() {
+            return data;
+        }
+
+        public void setData(byte data) {
+            this.data = data;
+        }
     }
 }

lib/src/test/java/nl/sanderhautvast/json/ser/primitives/CharPropertyTest.java

@@ -1,6 +1,5 @@
 package nl.sanderhautvast.json.ser.primitives;
 
-import lombok.Data;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
@@ -24,8 +23,15 @@ public class CharPropertyTest {
         assertEquals("{\"data\":\"a\"}", Mapper.json(object));
     }
 
-    @Data
     public static class Bean {
         private char data;
+
+        public char getData() {
+            return data;
+        }
+
+        public void setData(char data) {
+            this.data = data;
+        }
     }
 }

lib/src/test/java/nl/sanderhautvast/json/ser/primitives/DoublePropertyTest.java

@@ -1,6 +1,5 @@
 package nl.sanderhautvast.json.ser.primitives;
 
-import lombok.Data;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
@@ -24,8 +23,16 @@ public class DoublePropertyTest {
         assertEquals("{\"data\":326.2}", Mapper.json(object));
     }
 
-    @Data
     public static class Bean {
         private double data;
+
+        @SuppressWarnings("unused")
+        public double getData() {
+            return data;
+        }
+
+        public void setData(double data) {
+            this.data = data;
+        }
     }
 }

lib/src/test/java/nl/sanderhautvast/json/ser/primitives/FloatPropertyTest.java

@@ -1,6 +1,5 @@
 package nl.sanderhautvast.json.ser.primitives;
 
-import lombok.Data;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
@@ -24,8 +23,15 @@ public class FloatPropertyTest {
         assertEquals("{\"data\":1.0}", Mapper.json(object));
     }
 
-    @Data
     public static class Bean {
         private float data;
+
+        public float getData() {
+            return data;
+        }
+
+        public void setData(float data) {
+            this.data = data;
+        }
     }
 }

lib/src/test/java/nl/sanderhautvast/json/ser/primitives/IntPropertyTest.java

@@ -1,6 +1,5 @@
 package nl.sanderhautvast.json.ser.primitives;
 
-import lombok.Data;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
@@ -25,8 +24,15 @@ public class IntPropertyTest {
         assertEquals("{\"data\":1}", Mapper.json(object));
     }
 
-    @Data
     public static class Bean {
         int data;
+
+        public int getData() {
+            return data;
+        }
+
+        public void setData(int data) {
+            this.data = data;
+        }
     }
 }

lib/src/test/java/nl/sanderhautvast/json/ser/primitives/LongPropertyTest.java

@@ -1,12 +1,10 @@
 package nl.sanderhautvast.json.ser.primitives;
 
-import lombok.Data;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-
 public class LongPropertyTest {
     @Test
     public void testPrimitive() {
@@ -25,8 +23,15 @@ public class LongPropertyTest {
         assertEquals("{\"data\":1}", Mapper.json(object));
     }
 
-    @Data
     public static class Bean {
         private long data;
+
+        public long getData() {
+            return data;
+        }
+
+        public void setData(long data) {
+            this.data = data;
+        }
     }
 }

lib/src/test/java/nl/sanderhautvast/json/ser/primitives/NullPropertyTest.java

@@ -1,6 +1,5 @@
 package nl.sanderhautvast.json.ser.primitives;
 
-import lombok.Data;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
@@ -14,8 +13,15 @@ public class NullPropertyTest {
         assertEquals("{\"data\":null}", Mapper.json(object));
     }
 
-    @Data
     public static class Bean {
         private String data;
+
+        public String getData() {
+            return data;
+        }
+
+        public void setData(String data) {
+            this.data = data;
+        }
     }
 }

lib/src/test/java/nl/sanderhautvast/json/ser/primitives/ShortPropertyTest.java

@@ -1,6 +1,5 @@
 package nl.sanderhautvast.json.ser.primitives;
 
-import lombok.Data;
 import nl.sanderhautvast.json.ser.Mapper;
 import org.junit.jupiter.api.Test;
 
@@ -24,8 +23,15 @@ public class ShortPropertyTest {
         assertEquals("{\"data\":3}", Mapper.json(object));
     }
 
-    @Data
     public static class Bean {
         private short data;
+        @SuppressWarnings("unused")
+        public short getData() {
+            return data;
+        }
+
+        public void setData(short data) {
+            this.data = data;
+        }
     }
 }

pom.xml

@@ -4,9 +4,9 @@
 
     <name>JsonToy</name>
     <groupId>nl.sander</groupId>
-    <artifactId>jsonthingy</artifactId>
+    <artifactId>jsonthingy-pom</artifactId>
     <version>0.1-SNAPSHOT</version>
-    <packaging>jar</packaging>
+    <packaging>pom</packaging>
 
     <properties>
         <maven.compiler.source>9</maven.compiler.source>
@@ -14,50 +14,52 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
-    <dependencies>
+    <modules>
-        <dependency>
+        <module>lib</module>
-            <groupId>org.ow2.asm</groupId>
+        <module>jmh</module>
-            <artifactId>asm-tree</artifactId>
+    </modules>
-            <version>9.4</version>
-        </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter</artifactId>
-            <version>5.9.3</version>
-            <scope>test</scope>
-        </dependency>
-
-        <dependency>
-            <groupId>org.mockito</groupId>
-            <artifactId>mockito-all</artifactId>
-            <version>1.10.19</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.projectlombok</groupId>
-            <artifactId>lombok</artifactId>
-            <version>1.18.26</version>
-            <scope>test</scope>
-        </dependency>
-
-        <dependency>
-            <groupId>com.fasterxml.jackson.core</groupId>
-            <artifactId>jackson-databind</artifactId>
-            <version>2.15.1</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
 
     <build>
-        <plugins>
+        <pluginManagement>
-            <plugin>
+            <plugins>
-                <groupId>org.apache.maven.plugins</groupId>
+                <plugin>
-                <artifactId>maven-surefire-plugin</artifactId>
+                    <artifactId>maven-clean-plugin</artifactId>
-                <version>3.1.0</version>
+                    <version>2.5</version>
-                <configuration>
+                </plugin>
-                    <argLine>--add-opens java.base/java.lang=ALL-UNNAMED</argLine>
+                <plugin>
-                </configuration>
+                    <artifactId>maven-deploy-plugin</artifactId>
-            </plugin>
+                    <version>2.8.1</version>
-        </plugins>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-install-plugin</artifactId>
+                    <version>2.5.1</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-jar-plugin</artifactId>
+                    <version>2.4</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-javadoc-plugin</artifactId>
+                    <version>2.9.1</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-resources-plugin</artifactId>
+                    <version>2.6</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-site-plugin</artifactId>
+                    <version>3.3</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-source-plugin</artifactId>
+                    <version>2.2.1</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-surefire-plugin</artifactId>
+                    <version>2.17</version>
+                </plugin>
+            </plugins>
+        </pluginManagement>
     </build>
+
 </project>

src/main/java/nl/sanderhautvast/json/ser/Mapper.java

@@ -1,302 +0,0 @@
-package nl.sanderhautvast.json.ser;
-
-import org.objectweb.asm.ClassReader;
-import org.objectweb.asm.ClassWriter;
-
-import java.io.IOException;
-import java.lang.reflect.InvocationTargetException;
-import java.util.*;
-import java.util.concurrent.ConcurrentHashMap;
-
-
-public class Mapper {
-    private static final Map<Class<?>, BaseMapper<?>> mappers = new ConcurrentHashMap<>();
-
-    private static final ByteClassLoader generatedClassesLoader = new ByteClassLoader();
-
-    static {
-        addMapper(String.class, new StringMapper());
-        addMapper(Boolean.class, new BooleanMapper());
-        addMapper(Integer.class, new IntegerMapper());
-        addMapper(Long.class, new LongMapper());
-        addMapper(Short.class, new ShortMapper());
-        addMapper(Byte.class, new ByteMapper());
-        addMapper(Character.class, new CharMapper());
-        addMapper(Float.class, new FloatMapper());
-        addMapper(Double.class, new DoubleMapper());
-    }
-
-    /**
-     * Add a new (custom) mapper implementation for the specified type
-     *
-     * @param type   The class to serialize to json
-     * @param mapper the Mapper implementation
-     */
-    public static <T> void addMapper(Class<T> type, BaseMapper<T> mapper) {
-        mappers.put(type, mapper);
-    }
-
-    /**
-     * returns the json representation of the value as a String
-     */
-    @SuppressWarnings({"unchecked", "rawtypes"})
-    public static <J> String json(Object value) {
-        if (value == null) {
-            return "null";
-        }
-        Class<J> type = (Class<J>) value.getClass();
-        if (type.isArray()) {
-            return array((Object[]) value);
-        }
-        if (value instanceof Collection) {
-            return list((Collection) value);
-        }
-        if (value instanceof Map) {
-            return object((Map) value);
-        }
-        BaseMapper mapper = mappers.computeIfAbsent(type, key -> createObjectMapper(type));
-        return mapper.json(value);
-    }
-
-    @SuppressWarnings({"rawtypes", "unchecked"})
-    private static String array(Object[] array) {
-        if (array.length == 0) {
-            return "[]";
-        }
-        Object first = array[0];
-        Class<?> elementType = first.getClass();
-        BaseMapper mapper = mappers.computeIfAbsent(elementType, key -> createObjectMapper(elementType));
-        StringBuilder builder = new StringBuilder("[");
-        builder.append(mapper.json(first));
-        Arrays.stream(array).skip(1)
-                .forEach(element -> {
-                    builder.append(",");
-                    builder.append(mapper.json(element));
-                });
-        builder.append("]");
-        return builder.toString();
-    }
-
-    @SuppressWarnings({"rawtypes", "unchecked"})
-    private static String list(Collection list) {
-        if (list.isEmpty()) {
-            return "[]";
-        }
-        Object first = list.iterator().next();
-        Class<?> elementType = first.getClass();
-        BaseMapper mapper = mappers.computeIfAbsent(elementType, key -> createObjectMapper(elementType));
-        StringBuilder builder = new StringBuilder("[");
-        builder.append(mapper.json(first));
-        list.stream().skip(1)
-                .forEach(element -> {
-                    builder.append(",");
-                    builder.append(mapper.json(element));
-                });
-        builder.append("]");
-        return builder.toString();
-    }
-
-
-    @SuppressWarnings({"rawtypes", "unchecked"})
-    private static String object(Map map) {
-        if (map.isEmpty()) {
-            return "{}";
-        }
-        Set<Map.Entry> entries = map.entrySet();
-        Map.Entry first = entries.iterator().next();
-        Class<?> valueType = first.getValue().getClass();
-
-        BaseMapper mapper = mappers.computeIfAbsent(valueType, key -> createObjectMapper(valueType));
-        StringBuilder builder = new StringBuilder("{");
-        builder.append("\"").append(first.getKey()).append("\":").append(mapper.json(first.getValue()));
-        entries.stream().skip(1)
-                .forEach(entry -> {
-                    builder.append(",\"");
-                    builder.append(entry.getKey()).append("\":");
-                    builder.append(mapper.json(entry.getValue()));
-                });
-        builder.append("}");
-        return builder.toString();
-    }
-
-    public static String json(byte value) {
-        return Byte.toString(value);
-    }
-
-    public static String json(boolean value) {
-        return Boolean.toString(value);
-    }
-
-    public static String json(short value) {
-        return Short.toString(value);
-    }
-
-    public static String json(int value) {
-        return Integer.toString(value);
-    }
-
-    public static String json(long value) {
-        return Long.toString(value);
-    }
-
-    public static String json(char value) {
-        return "\"" + escape(value) + "\"";
-    }
-
-    public static String json(float value) {
-        return Float.toString(value);
-    }
-
-    public static String json(double value) {
-        return Double.toString(value);
-    }
-
-    @SuppressWarnings("unchecked")
-    private static <T> BaseMapper<T> createObjectMapper(Class<T> forType) {
-        try {
-            ClassReader cr = new ClassReader(forType.getName());
-            MapperFactory mapperFactory = new MapperFactory();
-            cr.accept(mapperFactory, 0);
-            ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
-
-            mapperFactory.classNode.accept(classWriter);
-            byte[] byteArray = classWriter.toByteArray();
-            generatedClassesLoader.addClass(mapperFactory.classNode.name, byteArray);
-            return (BaseMapper<T>) generatedClassesLoader.loadClass(mapperFactory.classNode.name).getConstructor().newInstance();
-        } catch (IOException | ClassNotFoundException | NoSuchMethodException | InstantiationException |
-                 IllegalAccessException | InvocationTargetException e) {
-            throw new JsonError(e);
-        }
-    }
-
-    private static String escape(char c) {
-        return escape(String.valueOf(c));
-    }
-
-    static String escape(String value) {
-        StringBuilder b = new StringBuilder(value);
-        int i = 0;
-        while (i < b.length()) {
-            char c = b.charAt(i);
-            switch (c) {
-                case '\t':
-                    b.replace(i,i+1, "\\");
-                    b.insert(i+1, "t");
-                    break;
-                case '\"':
-                    b.replace(i,i+1, "\\");
-                    b.insert(++i, "\"");
-                    break;
-                case '/':
-                    b.replace(i,i+1, "\\");
-                    b.insert(++i, "/");
-                    break;
-                case '\r':
-                    b.replace(i,i+1, "\\");
-                    b.insert(++i, "r");
-                    break;
-                case '\n':
-                    b.replace(i,i+1, "\\");
-                    b.insert(++i, "n");
-                    break;
-                case '\b':
-                    b.replace(i,i+1, "\\");
-                    b.insert(++i, "b");
-                    break;
-                case '\f':
-                    b.replace(i,i+1, "\\");
-                    b.insert(++i, "f");
-                    break;
-                case '\\':
-                    b.replace(i,i+1, "\\");
-                    b.insert(++i, "\\");
-                    break;
-                case '\'':
-                    break;
-                default:
-                    if ((c <= '\u001F') || (c >= '\u007F' && c <= '\u009F') || (c >= '\u2000' && c <= '\u20FF')) {
-                        String ss = Integer.toHexString(c);
-                        b.replace(i,i+1,"\\");
-                        b.insert(++i, "u");
-                        for (int k = 0; k < 4 - ss.length(); k++) {
-                            b.insert(++i,'0');
-                        }
-                        b.insert(++i,ss.toUpperCase());
-                    }
-            }
-            i++;
-        }
-        return b.toString();
-    }
-}
-
-class BooleanMapper extends BaseMapper<Boolean> {
-
-    @Override
-    public String json(Boolean b) {
-        return Boolean.toString(b);
-    }
-}
-
-class ShortMapper extends BaseMapper<Short> {
-
-    @Override
-    public String json(Short value) {
-        return Short.toString(value);
-    }
-}
-
-class StringMapper extends BaseMapper<String> {
-    @Override
-    public String json(String value) {
-        return "\"" + Mapper.escape(value) + "\"";
-    }
-}
-
-class IntegerMapper extends BaseMapper<Integer> {
-
-    @Override
-    public String json(Integer value) {
-        return Integer.toString(value);
-    }
-}
-
-class LongMapper extends BaseMapper<Long> {
-
-    @Override
-    public String json(Long value) {
-        return Long.toString(value);
-    }
-}
-
-class ByteMapper extends BaseMapper<Byte> {
-
-    @Override
-    protected String json(Byte value) {
-        return Byte.toString(value);
-    }
-}
-
-class CharMapper extends BaseMapper<Character> {
-
-    @Override
-    protected String json(Character value) {
-        return "\"" + value + "\"";
-    }
-}
-
-class FloatMapper extends BaseMapper<Float> {
-
-    @Override
-    protected String json(Float value) {
-        return Float.toString(value);
-    }
-}
-
-class DoubleMapper extends BaseMapper<Double> {
-
-    @Override
-    protected String json(Double value) {
-        return Double.toString(value);
-    }
-}

src/test/java/nl/sanderhautvast/json/ser/nested/Bean1.java

@@ -1,10 +0,0 @@
-package nl.sanderhautvast.json.ser.nested;
-
-
-import lombok.Data;
-
-@Data
-public class Bean1 {
-    private String data1;
-    private Bean2 bean2;
-}

src/test/java/nl/sanderhautvast/json/ser/nested/Bean2.java

@@ -1,9 +0,0 @@
-package nl.sanderhautvast.json.ser.nested;
-
-
-import lombok.Data;
-
-@Data
-public class Bean2 {
-    private String data2;
-}