serialization

问题 I am currently making API with RoR, and I need to create an object with virtual attributes and associated object. The problem is that serializer does not kick in when I return an object with virtual attribute. Here is the returned object from foo_controller { :id=>280, :virtual=>"y8st07ef7u" :user_id=>280 } :virtual is a virtual attribute and user_id is an id of associated table - User. My goal is to make this { :id=>280, :virtual=>"y8st07ef7u", :user=>{ :id=>280, :name=>'foo' } } Foo

问题 Previously, we serialized a property as a List<byte> Now we want to change it to be a byte[] . It was out understanding that you should be able to swap out collection types freely between version but we get a ProtoBuf.ProtoException [TestFixture, Category("Framework")] class CollectionTypeChange { [Test] public void TestRoundTrip() { var bytes = new List<byte>() {1,2,4}; var a = new ArrayHolder(bytes); var aCopy = Deserialize<ArrayHolder>(Serialize(a)); //Passes Assert.That(aCopy

问题 I'm trying to save a Brush object using serializing but I get error below: Type 'System.Windows.Media.LinearGradientBrush' in Assembly 'PresentationCore, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' is not marked as serializable How can I save a Brush object into a file? 回答1: Try this... var brush = new LinearGradientBrush(new GradientStopCollection( new GradientStop[] { new GradientStop(Colors.Blue, 2.0), new GradientStop(Colors.Red, 3.0) })); using (var outfile = File

问题 Here is my class hierarchy: Banana class: @JsonTypeName("banana") @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "@type") public class Banana<T, M> extends Fruit<T, M> { Fruit class: @JsonTypeInfo(use = JsonTypeInfo.Id.NAME) @JsonSubTypes({ @JsonSubTypes.Type(value = Banana.class, name = "banana")}) public class Fruit<T, M> { private boolean ok; private T main; Car class: @JsonTypeName("car") public class Car extends Vehicle { Abstract Vehicle class:

问题 I am getting a dill/pickle memory error when loading a serialized object file. I am not quite sure what is happening and I am unsure on how to fix it. When I call: stat_bundle = train_batch_iterator(clf, TOTAL_TRAINED_EVENTS) The code traces to the train_batch_iterator function in which it loads a serialized object and trains the classifier with the data within the object. This is the code: def train_batch_iterator(clf, tte): plot_data = [] # initialize plot data array for file in glob.glob('

问题 I have a class that, among other properties, has a list of MyObject. public class MyClass { ... [XmlArray("OBJECT")] public List<MyObject> Objects { get; set; } ... } Each MyObject has two properties, PropA and PropB. public class MyObject { public string PropA {get;set;} public string PropB {get;set;} } The XML Serializer returns this XML: <OBJECT> <MyObject> <PropA>A1</PropA> <PropB>B1</PropB> </MyObject> <MyObject> <PropA>A2</PropA> <PropB>B2</PropB> </MyObject> <MyObject> <PropA>A3</PropA

问题 I am trying to figure out a class/struture to handle the following JSON format: { "ReturnData": [ { "id": "msg2DoesNotExistName", "value": "value 1", "userExists": 2 }, { "id": "msg2DoesNotExistName", "value": "Value 2", "userExists": 2 } ], "SetValue": [ { "id": "msg2DoesNotExistName", "value": "value 1" }, { "id": "msg2DoesNotExistName", "value": "Value 2" } ] } I have tried (just the SetValue portion): <Serializable()> _ Public Class Stuff Public SetValue() As ArrayList End Class Public

问题 I have a Dictionary variable, the program reads XML files, and then instantiates objects stored in the Dictionary variable by type for performance. I would like to store the Dictionary variable to memcache for reuse, but, because the Dictionary variable and instantiated objects are reference types, when I operate instantiated objects to change some value, the cache value of memcache also changed. Code like the following. Dictionary variable and XPathNavigator variable of class can't serialize

问题 I'm serializing quite complex data-structures using native JSON.stringify of chrome(will switch to some serialization library later for cross-browser support). Most of the data can be looked upon as static, but some is dynamic. When constructing the data I'd like to be able to do something like var dynamicString=new String(); {a:"foo", b:dynamicString} Then set the primitive string-value of dynamicString later on. I'd like to do this rather than changing the property "b" of that object

问题 I am going through Effective Java, item 75: If all instance fields are transient, it is technically permissible to dispense with invoking defaultWriteObject and defaultReadObject , but it is not recommended. Even if all instance fields are transient, invoking defaultWriteObject affects the serialized form, resulting in greatly enhanced flexibility. The resulting serialized form makes it possible to add nontransient instance fields in a later release while preserving backward and forward