castMap method

Map castMap(Map map, { bool nullable = false, })

Casts map to this type (Map<K,V>), resolving the casting for K and V if there's a ClassReflection or EnumReflection for them registered at ReflectionFactory.

Implementation

Map castMap(Map map, {bool nullable = false}) {
  var keyType = isCollection
      ? (argumentType(0) ?? TypeInfo.tDynamic)
      : TypeInfo.tDynamic;
  var valueType = isCollection
      ? (argumentType(1) ?? TypeInfo.tDynamic)
      : TypeInfo.tDynamic;

  var reflectionFactory = ReflectionFactory();

  var keyReflection =
      reflectionFactory.getRegisterClassReflection(keyType.type) ??
          reflectionFactory.getRegisterEnumReflection(keyType.type);

  var valueReflection =
      reflectionFactory.getRegisterClassReflection(valueType.type) ??
          reflectionFactory.getRegisterEnumReflection(valueType.type);

  if (keyReflection != null && valueReflection != null) {
    var tMap = TypeInfo.fromMapType(
        keyReflection.typeInfo, valueReflection.typeInfo);

    if (valueReflection == keyReflection) {
      return keyReflection.castMap(map, tMap, nullable: nullable) ?? map;
    } else {
      var mapKeysCast =
          keyReflection.castMapKeys(map, tMap, nullable: nullable) ?? map;

      var mapCast = valueReflection.castMapValues(mapKeysCast, this,
              nullable: nullable) ??
          map;

      return mapCast;
    }
  } else if (keyReflection != null) {
    return keyReflection.castMapKeys(map, this, nullable: nullable) ?? map;
  } else if (valueReflection != null) {
    return valueReflection.castMapValues(map, this, nullable: nullable) ??
        map;
  }

  if (keyType.isValidGenericType && valueType.isValidGenericType) {
    return keyType.callCasted(<K>() {
      return valueType.callCasted(<V>() => map.cast<K, V>());
    });
  } else if (keyType.isValidGenericType) {
    return keyType.callCasted(<K>() => map.cast<K, dynamic>());
  } else if (valueType.isValidGenericType) {
    return valueType.callCasted(<V>() => map.cast<dynamic, V>());
  }

  return map;
}