qbit/core/src/main/java/io/advantageous/qbit/boon/client/BoonClient.java
private <T> Callback createHandler(final Class<T> serviceInterface, final MethodCall call,
                                       final Callback handler) {

        final ClassMeta<T> clsMeta = ClassMeta.classMeta(serviceInterface);
        final MethodAccess method = clsMeta.method(call.name());

        Class<?> returnType = null;
        Class<?> compType = null;

        if (Promise.class.isAssignableFrom(method.returnType()) ) {

            Type t0 = method.method().getGenericReturnType();
            if (t0 instanceof ParameterizedType) {
                ParameterizedType parameterizedType = ((ParameterizedType) t0);
                Type type = ((parameterizedType != null ? parameterizedType.getActualTypeArguments().length : 0) > 0 ? (parameterizedType != null ? parameterizedType.getActualTypeArguments() : new Type[0])[0] : null);

                if (type instanceof ParameterizedType) {
                    returnType = (Class) ((ParameterizedType) type).getRawType();
                    final Type type1 = ((ParameterizedType) type).getActualTypeArguments()[0];

                    if (type1 instanceof Class) {
                        compType = (Class) type1;
                    }
                } else if (type instanceof Class) {
                    returnType = (Class<?>) type;
                }

            }
        } else {
            if (method.parameterTypes().length > 0) {
                Type[] genericParameterTypes = method.getGenericParameterTypes();
                ParameterizedType parameterizedType = genericParameterTypes.length > 0 ? (ParameterizedType) genericParameterTypes[0] : null;

                Type type = ((parameterizedType != null ? parameterizedType.getActualTypeArguments().length : 0) > 0 ? (parameterizedType != null ? parameterizedType.getActualTypeArguments() : new Type[0])[0] : null);

                if (type instanceof ParameterizedType) {
                    returnType = (Class) ((ParameterizedType) type).getRawType();
                    final Type type1 = ((ParameterizedType) type).getActualTypeArguments()[0];

                    if (type1 instanceof Class) {
                        compType = (Class) type1;
                    }
                } else if (type instanceof Class) {
                    returnType = (Class<?>) type;
                }

            }
        }
        final Class<?> actualReturnType = returnType;

        final Class<?> componentClass = compType;

        /** Create the return handler. */
        return new Callback<Object>() {
            @Override
            public void accept(Object event) {

                if (actualReturnType != null) {

                    if (componentClass != null && actualReturnType == List.class) {

                        try {
                            //noinspection unchecked
                            event = MapObjectConversion.convertListOfMapsToObjects(componentClass, (List) event);
                        } catch (Exception ex) {
                            if (event instanceof CharSequence) {
                                String errorMessage = event.toString();
                                if (errorMessage.startsWith("java.lang.IllegalState")) {
                                    handler.onError(new IllegalStateException(errorMessage));
                                    return;
                                } else {
                                    handler.onError(new IllegalStateException("Conversion error"));
                                    return;
                                }
                            } else {
                                handler.onError(new IllegalStateException("Conversion error"));
                                return;
                            }
                        }
                    } else {

                        switch (actualReturnType.getName()) {
                            case "java.lang.Boolean":
                                if (event instanceof Value) {
                                    event = ((Value) event).booleanValue();
                                } else {
                                    event = Conversions.coerce(actualReturnType, event);
                                }
                                break;
                            default:
                                event = Conversions.coerce(actualReturnType, event);
                        }
                    }
                    //noinspection unchecked
                    handler.accept(event);
                }


            }

            @Override
            public void onError(Throwable error) {
                handler.onError(error);
            }

            @Override
            public void onTimeout() {
                handler.onTimeout();
            }
        };


    }
private <T> Callback createHandler(final Class<T> serviceInterface, final MethodCall call,
                                       final Callback handler) {

        final ClassMeta<T> clsMeta = ClassMeta.classMeta(serviceInterface);
        final MethodAccess method = clsMeta.method(call.name());

        Class<?> returnType = null;
        Class<?> compType = null;

        if (Promise.class.isAssignableFrom(method.returnType()) ) {

            Type t0 = method.method().getGenericReturnType();
            if (t0 instanceof ParameterizedType) {
                ParameterizedType parameterizedType = ((ParameterizedType) t0);
                Type type = ((parameterizedType != null ? parameterizedType.getActualTypeArguments().length : 0) > 0 ? (parameterizedType != null ? parameterizedType.getActualTypeArguments() : new Type[0])[0] : null);

                if (type instanceof ParameterizedType) {
                    returnType = (Class) ((ParameterizedType) type).getRawType();
                    final Type type1 = ((ParameterizedType) type).getActualTypeArguments()[0];

                    if (type1 instanceof Class) {
                        compType = (Class) type1;
                    }
                } else if (type instanceof Class) {
                    returnType = (Class<?>) type;
                }

            }
        } else {
            if (method.parameterTypes().length > 0) {
                Type[] genericParameterTypes = method.getGenericParameterTypes();
                ParameterizedType parameterizedType = genericParameterTypes.length > 0 ? (ParameterizedType) genericParameterTypes[0] : null;

                Type type = ((parameterizedType != null ? parameterizedType.getActualTypeArguments().length : 0) > 0 ? (parameterizedType != null ? parameterizedType.getActualTypeArguments() : new Type[0])[0] : null);

                if (type instanceof ParameterizedType) {
                    returnType = (Class) ((ParameterizedType) type).getRawType();
                    final Type type1 = ((ParameterizedType) type).getActualTypeArguments()[0];

                    if (type1 instanceof Class) {
                        compType = (Class) type1;
                    }
                } else if (type instanceof Class) {
                    returnType = (Class<?>) type;
                }

            }
        }
        final Class<?> actualReturnType = returnType;

        final Class<?> componentClass = compType;

        /** Create the return handler. */
        return new Callback<Object>() {
            @Override
            public void accept(Object event) {

                if (actualReturnType != null) {

                    if (componentClass != null && actualReturnType == List.class) {

                        try {
                            //noinspection unchecked
                            event = MapObjectConversion.convertListOfMapsToObjects(componentClass, (List) event);
                        } catch (Exception ex) {
                            if (event instanceof CharSequence) {
                                String errorMessage = event.toString();
                                if (errorMessage.startsWith("java.lang.IllegalState")) {
                                    handler.onError(new IllegalStateException(errorMessage));
                                    return;
                                } else {
                                    handler.onError(new IllegalStateException("Conversion error"));
                                    return;
                                }
                            } else {
                                handler.onError(new IllegalStateException("Conversion error"));
                                return;
                            }
                        }
                    } else {

                        switch (actualReturnType.getName()) {
                            case "java.lang.Boolean":
                                if (event instanceof Value) {
                                    event = ((Value) event).booleanValue();
                                } else {
                                    event = Conversions.coerce(actualReturnType, event);
                                }
                                break;
                            default:
                                event = Conversions.coerce(actualReturnType, event);
                        }
                    }
                    //noinspection unchecked
                    handler.accept(event);
                }


            }

            @Override
            public void onError(Throwable error) {
                handler.onError(error);
            }

            @Override
            public void onTimeout() {
                handler.onTimeout();
            }
        };


    }
private < T > Callback createHandler ( final Class < T > serviceInterface , final MethodCall call , final Callback handler ) { final ClassMeta < T > clsMeta = ClassMeta . classMeta ( serviceInterface ) ; final MethodAccess method = clsMeta . method ( call . name ( ) ) ; Class < ? > returnType = null ; Class < ? > compType = null ; if ( Promise . class . isAssignableFrom ( method . returnType ( ) ) ) { Type t0 = method . method ( ) . getGenericReturnType ( ) ; if ( t0 instanceof ParameterizedType ) { ParameterizedType parameterizedType = ( ( ParameterizedType ) t0 ) ; Type type = ( ( parameterizedType != null ? parameterizedType . getActualTypeArguments ( ) . length : 0 ) > 0 ? ( parameterizedType != null ? parameterizedType . getActualTypeArguments ( ) : new Type [ 0 ] ) [ 0 ] : null ) ; if ( type instanceof ParameterizedType ) { returnType = ( Class ) ( ( ParameterizedType ) type ) . getRawType ( ) ; final Type type1 = ( ( ParameterizedType ) type ) . getActualTypeArguments ( ) [ 0 ] ; if ( type1 instanceof Class ) { compType = ( Class ) type1 ; } } else if ( type instanceof Class ) { returnType = ( Class < ? > ) type ; } } } else { if ( method . parameterTypes ( ) . length > 0 ) { Type [ ] genericParameterTypes = method . getGenericParameterTypes ( ) ; ParameterizedType parameterizedType = genericParameterTypes . length > 0 ? ( ParameterizedType ) genericParameterTypes [ 0 ] : null ; Type type = ( ( parameterizedType != null ? parameterizedType . getActualTypeArguments ( ) . length : 0 ) > 0 ? ( parameterizedType != null ? parameterizedType . getActualTypeArguments ( ) : new Type [ 0 ] ) [ 0 ] : null ) ; if ( type instanceof ParameterizedType ) { returnType = ( Class ) ( ( ParameterizedType ) type ) . getRawType ( ) ; final Type type1 = ( ( ParameterizedType ) type ) . getActualTypeArguments ( ) [ 0 ] ; if ( type1 instanceof Class ) { compType = ( Class ) type1 ; } } else if ( type instanceof Class ) { returnType = ( Class < ? > ) type ; } } } final Class < ? > actualReturnType = returnType ; final Class < ? > componentClass = compType ; /** Create the return handler. */ return new Callback < Object > ( ) { @ Override public void accept ( Object event ) { if ( actualReturnType != null ) { if ( componentClass != null && actualReturnType == List . class ) { try { //noinspection unchecked event = MapObjectConversion . convertListOfMapsToObjects ( componentClass , ( List ) event ) ; } catch ( Exception ex ) { if ( event instanceof CharSequence ) { String errorMessage = event . toString ( ) ; if ( errorMessage . startsWith ( "java.lang.IllegalState" ) ) { handler . onError ( new IllegalStateException ( errorMessage ) ) ; return ; } else { handler . onError ( new IllegalStateException ( "Conversion error" ) ) ; return ; } } else { handler . onError ( new IllegalStateException ( "Conversion error" ) ) ; return ; } } } else { switch ( actualReturnType . getName ( ) ) { case "java.lang.Boolean" : if ( event instanceof Value ) { event = ( ( Value ) event ) . booleanValue ( ) ; } else { event = Conversions . coerce ( actualReturnType , event ) ; } break ; default : event = Conversions . coerce ( actualReturnType , event ) ; } } //noinspection unchecked handler . accept ( event ) ; } } @ Override public void onError ( Throwable error ) { handler . onError ( error ) ; } @ Override public void onTimeout ( ) { handler . onTimeout ( ) ; } } ; }
Create an async handler. Uses some generics reflection to see what the actual type is

@param serviceInterface client interface
@param call             method call object
@param handler          handler that will handle the message
@param <T>              the class of hte client interface
@return the new handler
Create an async handler . Uses some generics reflection to see what the actual type is