protected static T doCast()

in brooklyn-server/core/src/main/java/org/apache/brooklyn/feed/http/JsonFunctions.java [339:388]
49 lines of code
27 McCabe index (conditional complexity)

    protected static <T> T doCast(JsonElement input, Class<T> expected) {
        if (input == null) {
            return (T) null;
        } else if (input.isJsonNull()) {
            return (T) null;
        } else if (expected == boolean.class || expected == Boolean.class) {
            return (T) (Boolean) input.getAsBoolean();
        } else if (expected == char.class || expected == Character.class) {
            return (T) (Character) input.getAsCharacter();
        } else if (expected == byte.class || expected == Byte.class) {
            return (T) (Byte) input.getAsByte();
        } else if (expected == short.class || expected == Short.class) {
            return (T) (Short) input.getAsShort();
        } else if (expected == int.class || expected == Integer.class) {
            return (T) (Integer) input.getAsInt();
        } else if (expected == long.class || expected == Long.class) {
            return (T) (Long) input.getAsLong();
        } else if (expected == float.class || expected == Float.class) {
            return (T) (Float) input.getAsFloat();
        } else if (expected == double.class || expected == Double.class) {
            return (T) (Double) input.getAsDouble();
        } else if (expected == BigDecimal.class) {
            return (T) input.getAsBigDecimal();
        } else if (expected == BigInteger.class) {
            return (T) input.getAsBigInteger();
        } else if (Number.class.isAssignableFrom(expected)) {
            // TODO Will result in a class-cast if it's an unexpected sub-type of Number not handled above
            return (T) input.getAsNumber();
        } else if (expected == String.class) {
            return (T) input.getAsString();
        } else if (expected.isArray()) {
            JsonArray array = input.getAsJsonArray();
            Class<?> componentType = expected.getComponentType();
            if (JsonElement.class.isAssignableFrom(componentType)) {
                JsonElement[] result = new JsonElement[array.size()];
                for (int i = 0; i < array.size(); i++) {
                    result[i] = array.get(i);
                }
                return (T) result;
            } else {
                Object[] result = (Object[]) Array.newInstance(componentType, array.size());
                for (int i = 0; i < array.size(); i++) {
                    result[i] = cast(componentType).apply(array.get(i));
                }
                return (T) result;
            }
        } else {
            throw new IllegalArgumentException("Cannot cast json element to type "+expected);
        }
    }