shell/console/src/main/java/org/apache/karaf/shell/commands/converter/DefaultConverter.java [207:400]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    private static Object createObject(String value, Class type) throws Exception {
        if (type.isInterface() || Modifier.isAbstract(type.getModifiers())) {
            throw new Exception("Unable to convert value " + value + " to type " + type + ". Type " + type + " is an interface or an abstract class");
        }
        Constructor constructor = null;
        try {
            constructor = type.getConstructor(String.class);
        } catch (NoSuchMethodException e) {
            throw new RuntimeException("Unable to convert to " + type);
        }
        try {
            return constructor.newInstance(value);
        } catch (Exception e) {
            throw new Exception("Unable to convert ", getRealCause(e));
        }
    }

    private static Throwable getRealCause(Throwable t) {
        if (t instanceof InvocationTargetException && t.getCause() != null) {
            return t.getCause();
        }
        return t;
    }

    private Object convertToCollection(Object obj, ReifiedType type) throws Exception {
        ReifiedType valueType = type.getActualTypeArgument(0);
        Collection newCol = (Collection) getCollection(toClass(type)).newInstance();
        if (obj.getClass().isArray()) {
            for (int i = 0; i < Array.getLength(obj); i++) {
                try {
                    newCol.add(convert(Array.get(obj, i), valueType));
                } catch (Exception t) {
                    throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting array element)", t);
                }
            }
        } else {
            for (Object item : (Collection) obj) {
                try {
                    newCol.add(convert(item, valueType));
                } catch (Exception t) {
                    throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting collection entry)", t);
                }
            }
        }
        return newCol;
    }

    private Object convertToDictionary(Object obj, ReifiedType type) throws Exception {
        ReifiedType keyType = type.getActualTypeArgument(0);
        ReifiedType valueType = type.getActualTypeArgument(1);
        Dictionary newDic = new Hashtable();
        if (obj instanceof Dictionary) {
            Dictionary dic = (Dictionary) obj;
            for (Enumeration keyEnum = dic.keys(); keyEnum.hasMoreElements();) {
                Object key = keyEnum.nextElement();
                try {
                    newDic.put(convert(key, keyType), convert(dic.get(key), valueType));
                } catch (Exception t) {
                    throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting map entry)", t);
                }
            }
        } else {
            for (Map.Entry e : ((Map<Object,Object>) obj).entrySet()) {
                try {
                    newDic.put(convert(e.getKey(), keyType), convert(e.getValue(), valueType));
                } catch (Exception t) {
                    throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting map entry)", t);
                }
            }
        }
        return newDic;
    }

    private Object convertToMap(Object obj, ReifiedType type) throws Exception {
        ReifiedType keyType = type.getActualTypeArgument(0);
        ReifiedType valueType = type.getActualTypeArgument(1);
        Map newMap = (Map) getMap(toClass(type)).newInstance();
        if (obj instanceof Dictionary) {
            Dictionary dic = (Dictionary) obj;
            for (Enumeration keyEnum = dic.keys(); keyEnum.hasMoreElements();) {
                Object key = keyEnum.nextElement();
                try {
                    newMap.put(convert(key, keyType), convert(dic.get(key), valueType));
                } catch (Exception t) {
                    throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting map entry)", t);
                }
            }
        } else {
            for (Map.Entry e : ((Map<Object,Object>) obj).entrySet()) {
                try {
                    newMap.put(convert(e.getKey(), keyType), convert(e.getValue(), valueType));
                } catch (Exception t) {
                    throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting map entry)", t);
                }
            }
        }
        return newMap;
    }

    private Object convertToArray(Object obj, ReifiedType type) throws Exception {
        if (obj instanceof Collection) {
            obj = ((Collection) obj).toArray();
        }
        if (!obj.getClass().isArray()) {
            throw new Exception("Unable to convert from " + obj + " to " + type);
        }
        ReifiedType componentType;
        if (type.size() > 0) {
            componentType = type.getActualTypeArgument(0);
        } else {
            componentType = new GenericType(type.getRawClass().getComponentType());
        }
        Object array = Array.newInstance(toClass(componentType), Array.getLength(obj));
        for (int i = 0; i < Array.getLength(obj); i++) {
            try {
                Array.set(array, i, convert(Array.get(obj, i), componentType));
            } catch (Exception t) {
                throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting array element)", t);
            }
        }
        return array;
    }

    public static boolean isAssignable(Object source, ReifiedType target) {
        return source == null
                || (target.size() == 0
                    && unwrap(target.getRawClass()).isAssignableFrom(unwrap(source.getClass())));
    }

    private static Class unwrap(Class c) {
        Class u = primitives.get(c);
        return u != null ? u : c;
    }

    private static Class getMap(Class type) {
        if (hasDefaultConstructor(type)) {
            return type;
        } else if (SortedMap.class.isAssignableFrom(type)) {
            return TreeMap.class;
        } else if (ConcurrentMap.class.isAssignableFrom(type)) {
            return ConcurrentHashMap.class;
        } else {
            return LinkedHashMap.class;
        }
    }

    private static Class getCollection(Class type) {
        if (hasDefaultConstructor(type)) {
            return type;
        } else if (SortedSet.class.isAssignableFrom(type)) {
            return TreeSet.class;
        } else if (Set.class.isAssignableFrom(type)) {
            return LinkedHashSet.class;
        } else if (List.class.isAssignableFrom(type)) {
            return ArrayList.class;
        } else if (Queue.class.isAssignableFrom(type)) {
            return LinkedList.class;
        } else {
            return ArrayList.class;
        }
    }

    private static boolean hasDefaultConstructor(Class type) {
        if (!Modifier.isPublic(type.getModifiers())) {
            return false;
        }
        if (Modifier.isAbstract(type.getModifiers())) {
            return false;
        }
        Constructor[] constructors = type.getConstructors();
        for (Constructor constructor : constructors) {
            if (Modifier.isPublic(constructor.getModifiers()) &&
                    constructor.getParameterTypes().length == 0) {
                return true;
            }
        }
        return false;
    }

    private static final Map<Class, Class> primitives;
    static {
        primitives = new HashMap<>();
        primitives.put(byte.class, Byte.class);
        primitives.put(short.class, Short.class);
        primitives.put(char.class, Character.class);
        primitives.put(int.class, Integer.class);
        primitives.put(long.class, Long.class);
        primitives.put(float.class, Float.class);
        primitives.put(double.class, Double.class);
        primitives.put(boolean.class, Boolean.class);
    }

    private Class toClass(ReifiedType type) {
        return type.getRawClass();
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



shell/core/src/main/java/org/apache/karaf/shell/support/converter/DefaultConverter.java [220:413]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    private static Object createObject(String value, Class type) throws Exception {
        if (type.isInterface() || Modifier.isAbstract(type.getModifiers())) {
            throw new Exception("Unable to convert value " + value + " to type " + type + ". Type " + type + " is an interface or an abstract class");
        }
        Constructor constructor = null;
        try {
            constructor = type.getConstructor(String.class);
        } catch (NoSuchMethodException e) {
            throw new RuntimeException("Unable to convert to " + type);
        }
        try {
            return constructor.newInstance(value);
        } catch (Exception e) {
            throw new Exception("Unable to convert ", getRealCause(e));
        }
    }

    private static Throwable getRealCause(Throwable t) {
        if (t instanceof InvocationTargetException && t.getCause() != null) {
            return t.getCause();
        }
        return t;
    }

    private Object convertToCollection(Object obj, ReifiedType type) throws Exception {
        ReifiedType valueType = type.getActualTypeArgument(0);
        Collection newCol = (Collection) getCollection(toClass(type)).newInstance();
        if (obj.getClass().isArray()) {
            for (int i = 0; i < Array.getLength(obj); i++) {
                try {
                    newCol.add(convert(Array.get(obj, i), valueType));
                } catch (Exception t) {
                    throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting array element)", t);
                }
            }
        } else {
            for (Object item : (Collection) obj) {
                try {
                    newCol.add(convert(item, valueType));
                } catch (Exception t) {
                    throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting collection entry)", t);
                }
            }
        }
        return newCol;
    }

    private Object convertToDictionary(Object obj, ReifiedType type) throws Exception {
        ReifiedType keyType = type.getActualTypeArgument(0);
        ReifiedType valueType = type.getActualTypeArgument(1);
        Dictionary newDic = new Hashtable();
        if (obj instanceof Dictionary) {
            Dictionary dic = (Dictionary) obj;
            for (Enumeration keyEnum = dic.keys(); keyEnum.hasMoreElements();) {
                Object key = keyEnum.nextElement();
                try {
                    newDic.put(convert(key, keyType), convert(dic.get(key), valueType));
                } catch (Exception t) {
                    throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting map entry)", t);
                }
            }
        } else {
            for (Map.Entry e : ((Map<Object,Object>) obj).entrySet()) {
                try {
                    newDic.put(convert(e.getKey(), keyType), convert(e.getValue(), valueType));
                } catch (Exception t) {
                    throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting map entry)", t);
                }
            }
        }
        return newDic;
    }

    private Object convertToMap(Object obj, ReifiedType type) throws Exception {
        ReifiedType keyType = type.getActualTypeArgument(0);
        ReifiedType valueType = type.getActualTypeArgument(1);
        Map newMap = (Map) getMap(toClass(type)).newInstance();
        if (obj instanceof Dictionary) {
            Dictionary dic = (Dictionary) obj;
            for (Enumeration keyEnum = dic.keys(); keyEnum.hasMoreElements();) {
                Object key = keyEnum.nextElement();
                try {
                    newMap.put(convert(key, keyType), convert(dic.get(key), valueType));
                } catch (Exception t) {
                    throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting map entry)", t);
                }
            }
        } else {
            for (Map.Entry e : ((Map<Object,Object>) obj).entrySet()) {
                try {
                    newMap.put(convert(e.getKey(), keyType), convert(e.getValue(), valueType));
                } catch (Exception t) {
                    throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting map entry)", t);
                }
            }
        }
        return newMap;
    }

    private Object convertToArray(Object obj, ReifiedType type) throws Exception {
        if (obj instanceof Collection) {
            obj = ((Collection) obj).toArray();
        }
        if (!obj.getClass().isArray()) {
            throw new Exception("Unable to convert from " + obj + " to " + type);
        }
        ReifiedType componentType;
        if (type.size() > 0) {
            componentType = type.getActualTypeArgument(0);
        } else {
            componentType = new GenericType(type.getRawClass().getComponentType());
        }
        Object array = Array.newInstance(toClass(componentType), Array.getLength(obj));
        for (int i = 0; i < Array.getLength(obj); i++) {
            try {
                Array.set(array, i, convert(Array.get(obj, i), componentType));
            } catch (Exception t) {
                throw new Exception("Unable to convert from " + obj + " to " + type + "(error converting array element)", t);
            }
        }
        return array;
    }

    public static boolean isAssignable(Object source, ReifiedType target) {
        return source == null
                || (target.size() == 0
                    && unwrap(target.getRawClass()).isAssignableFrom(unwrap(source.getClass())));
    }

    private static Class unwrap(Class c) {
        Class u = primitives.get(c);
        return u != null ? u : c;
    }

    private static Class getMap(Class type) {
        if (hasDefaultConstructor(type)) {
            return type;
        } else if (SortedMap.class.isAssignableFrom(type)) {
            return TreeMap.class;
        } else if (ConcurrentMap.class.isAssignableFrom(type)) {
            return ConcurrentHashMap.class;
        } else {
            return LinkedHashMap.class;
        }
    }

    private static Class getCollection(Class type) {
        if (hasDefaultConstructor(type)) {
            return type;
        } else if (SortedSet.class.isAssignableFrom(type)) {
            return TreeSet.class;
        } else if (Set.class.isAssignableFrom(type)) {
            return LinkedHashSet.class;
        } else if (List.class.isAssignableFrom(type)) {
            return ArrayList.class;
        } else if (Queue.class.isAssignableFrom(type)) {
            return LinkedList.class;
        } else {
            return ArrayList.class;
        }
    }

    private static boolean hasDefaultConstructor(Class type) {
        if (!Modifier.isPublic(type.getModifiers())) {
            return false;
        }
        if (Modifier.isAbstract(type.getModifiers())) {
            return false;
        }
        Constructor[] constructors = type.getConstructors();
        for (Constructor constructor : constructors) {
            if (Modifier.isPublic(constructor.getModifiers()) &&
                    constructor.getParameterTypes().length == 0) {
                return true;
            }
        }
        return false;
    }

    private static final Map<Class, Class> primitives;
    static {
        primitives = new HashMap<>();
        primitives.put(byte.class, Byte.class);
        primitives.put(short.class, Short.class);
        primitives.put(char.class, Character.class);
        primitives.put(int.class, Integer.class);
        primitives.put(long.class, Long.class);
        primitives.put(float.class, Float.class);
        primitives.put(double.class, Double.class);
        primitives.put(boolean.class, Boolean.class);
    }

    private Class toClass(ReifiedType type) {
        return type.getRawClass();
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -