serialization

问题 I have been experimenting with Apache Spark trying to solve some queries like top-k, skyline etc. I have made a wrapper which encloses SparkConf and JavaSparkContext named SparkContext . This class also implements serializable but since SparkConf and JavaSparkContext are not serializable then the class isn't either. I have a class solving the topK query named TopK , the class implements serializable but the class also has a SparkContext member variable which is not serializable (for the

问题 I'm trying to take a list and serialize each item and put it into a CSV file with a key to create a text file with key/value pairs. Ultimately this is going to run through Hadoop streaming so before you ask, I think it really does need to be in a text file. (but I'm open to other ideas) This all seemed seemed pretty straight forward at first. But I can't quite get serialization to work the way I want it (still). If I do this: > rawToChar(serialize("blah", NULL, ascii=T)) [1] "A\n2\n133888

问题 I'm trying to take a list and serialize each item and put it into a CSV file with a key to create a text file with key/value pairs. Ultimately this is going to run through Hadoop streaming so before you ask, I think it really does need to be in a text file. (but I'm open to other ideas) This all seemed seemed pretty straight forward at first. But I can't quite get serialization to work the way I want it (still). If I do this: > rawToChar(serialize("blah", NULL, ascii=T)) [1] "A\n2\n133888

问题 I'm trying to store a complex object here and am doing that by serialising the object running a mysql_real_escape_string on it and inserting it into a mysql database. However when I retrieve it running a sql query - I'm using Zend frameworks Zend_DB_Table here but anyway - and when I try to stripslashes and unserialize I dont get my object back. I've tried to just unserialize without stripping slashes and all but nothings working. UPDATE This is weird. I made a simple page which just

问题 I'm trying to store a complex object here and am doing that by serialising the object running a mysql_real_escape_string on it and inserting it into a mysql database. However when I retrieve it running a sql query - I'm using Zend frameworks Zend_DB_Table here but anyway - and when I try to stripslashes and unserialize I dont get my object back. I've tried to just unserialize without stripping slashes and all but nothings working. UPDATE This is weird. I made a simple page which just

问题 I have been working with a 3rd party java based REST webservice, that returns an array of xmlNodes. The xmlNode[] respresent an object and I am trying to work out the best way to Deserialize the xmlNode[] in the object? is it to build up a xmlDocument first and the Deserialize ? Thanks 回答1: If you have the WCF Rest Starter Kit preview installed, there's a neat trick: open Visual Studio select your XML node contents (the XML that makes up one of your nodes) and copy it to the clipboard from

问题 I have been working with a 3rd party java based REST webservice, that returns an array of xmlNodes. The xmlNode[] respresent an object and I am trying to work out the best way to Deserialize the xmlNode[] in the object? is it to build up a xmlDocument first and the Deserialize ? Thanks 回答1: If you have the WCF Rest Starter Kit preview installed, there's a neat trick: open Visual Studio select your XML node contents (the XML that makes up one of your nodes) and copy it to the clipboard from

问题 I'm trying to get to this result while serializing XML <Test> <Category> <FileName>C:\test.txt</FileName> <!-- Note that here this is an array of a simple class with two fields without root --> <Prop1>1</Prop1> <Prop2>2</Prop2> <Prop1>4</Prop1> <Prop2>5</Prop2> <!-- End array --> </Category> </Test> I already try different things like this [Serializable] [XmlRoot("Test")] public class Test { [XmlElement("Category")] public List<Category> Category= new List<Category>(); } [Serializable]

问题 I have this Object public class ConversationAPI { [JsonProperty(PropertyName = "lU")] public DateTime LastUpdated { get; set; } [JsonProperty(PropertyName = "m", TypeNameHandling = TypeNameHandling.All)] public List<Message> Messages { get; set; } } Which I send from the API as a json and I deserialize in my Client Application. The List<Message> Messages property contains either [Serializable] public class Message { [JsonProperty(PropertyName = "t")] public string Text { get; set; }

问题 As far as my understanding goes constructor of class whose Object is serialized is not called but the no-arg constructor of 1st non serializable constructor. Now consider following code public class SerializeDemo implements Serializable { private String name; int age; //default 0 public SerializeDemo(String name, boolean setAge){ this.name = name; if(setAge){ this.age = 18; } } @Override public String toString() { return "Name is " + name + " and age is " + age; } public static void main