serializable

What is the penalty for unnecessarily implementing Serializable?

由 荒凉一梦 提交于 2019-11-26 22:05:28
问题 I need to develop a Java RMI application for my distributed systems class. During the lecture, the professor was stressing to only let classes implement Serializable that have to be passed by value over the network. This implies that there is some downside or penalty to letting too many classes implement Serializable . Classes that don't require to be sent over the network. I don't see how there could be any downside since the serialization/deserialization would never happen if you never

Using Serializable attribute on Model in WebAPI

由 夙愿已清 提交于 2019-11-26 21:32:20
问题 I have the following scenario: I am using WebAPI and returning JSON results to the consumer based on a model. I now have the additional requirement to serialize the models to base64 to be able to persist them in cache and/or use them for auditing purposes. Problem is that when I add the [Serializable] attribute to the model so for converting the the model to Base64, the JSON output changes as follows: The Model: [Serializable] public class ResortModel { public int ResortKey { get; set; }

Is using Serializable in Android bad?

由 一世执手 提交于 2019-11-26 18:30:34
I've been reading a lot of posts and articles extolling the speed of Parcelable over Serializable. I've been using both for a while to pass data between Activities through Intents, and have yet to notice any speed difference when switching between the two. The typical amount of data I have to transfer is 5 to 15 nested objects with 2 to 5 fields each. Since I have about 30 classes which must be transferable, implementing Parcelable requires a lot of boilerplate code that adds maintenance time. One of my current requirements is also that the compiled code should be as small as possible; I

ASP.NET Web API and [Serializable] class

由 我是研究僧i 提交于 2019-11-26 14:29:07
问题 I have a class that is marked with [Serializable]. When i return it from the Web API the field names are all funky. Normally the JSON returned is [{"OrderId":797 ... JSON returned when using [Serializable] [{"<OrderId>k__BackingField":797 ... I wan't to mark it serializable to use a BinaryFormatter for caching. Is there any other way than to write a custom serializer or to make a twin class that is not serializable and write monkey code to "cast" between the two? 回答1: You just need this one

What does Serializable mean?

由 懵懂的女人 提交于 2019-11-26 14:08:30
What exactly does it mean for a class to be Serializable in Java? Or in general, for that matter... Oded Serialization is persisting an object from memory to a sequence of bits, for instance for saving onto the disk. Deserialization is the opposite - reading data from the disk to hydrate/create an object. In the context of your question, it is an interface that if implemented in a class, this class can automatically be serialized and deserialized by different serializers. Though most of the users have already given the answer, but I would like to add an example for those who need it in order

What does it mean: The serializable class does not declare a static final serialVersionUID field? [duplicate]

由 主宰稳场 提交于 2019-11-26 14:07:21
This question already has an answer here: What is a serialVersionUID and why should I use it? 24 answers I have the warning message given in the title. I would like to understand and remove it. I found already some answers on this question but I do not understand these answers because of an overload with technical terms. Is it possible to explain this issue with simple words? P.S. I know what OOP is. I know what is object, class, method, field and instantiation. P.P.S. If somebody needs my code it is here: import java.awt.*; import javax.swing.*; public class HelloWorldSwing extends JFrame {

using XmlArrayItem attribute without XmlArray on Serializable C# class

由 大憨熊 提交于 2019-11-26 12:40:09
问题 I want XML in the following format: <configuration><!-- Only one configuration node --> <logging>...</logging><!-- Only one logging node --> <credentials>...</credentials><!-- One or more credentials nodes --> <credentials>...</credentials> </configuration> I\'m trying to create a class Configuration that has the [Serializable] attribute. To serialize the credentials nodes, I have the following: [XmlArray(\"configuration\")] [XmlArrayItem(\"credentials\", typeof(CredentialsSection))] public

Python serializable objects json

由 家住魔仙堡 提交于 2019-11-26 12:07:27
问题 class gpagelet: \"\"\" Holds 1) the pagelet xpath, which is a string 2) the list of pagelet shingles, list \"\"\" def __init__(self, parent): if not isinstance( parent, gwebpage): raise Exception(\"Parent must be an instance of gwebpage\") self.parent = parent # This must be a gwebpage instance self.xpath = None # String self.visibleShingles = [] # list of tuples self.invisibleShingles = [] # list of tuples self.urls = [] # list of string class gwebpage: \"\"\" Holds all the datastructure

Android ArrayList of custom objects - Save to SharedPreferences - Serializable?

由 帅比萌擦擦* 提交于 2019-11-26 11:39:29
I have an ArrayList of an object. The object contains the types 'Bitmap' and 'String' and then just getters and setters for both. First of all is Bitmap serializable? How would I go about serializing this to store it in SharedPreferences? I have seen many people ask a similar question but none seem to give a good answer. I would prefer some code examples if at all possible. If bitmap is not serializable then how do I go about storing this ArrayList? many thanks. Yes, you can save your composite object in shared preferences. Let's say.. Student mStudentObject = new Student(); SharedPreferences

What is the point of the ISerializable interface?

由 女生的网名这么多〃 提交于 2019-11-26 09:21:00
问题 It seems like I can serialize classes that don\'t have that interface, so I am unclear on its purpose. 回答1: ISerializable is used to provide custom binary serialization, usually for BinaryFormatter (and perhaps for remoting purposes). Without it, it uses the fields, which can be: inefficient; if there are fields that are only used for efficiency at runtime, but can be removed for serialization (for example, a dictionary may look different when serialized) inefficient; as even for fields that
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