I’m trying to serialize relations using @JsonItentityInfo to avoid circular references. I’ve created a test to try test the result of the serialization, and I’ve found that jackson is not behaving as I expected. The serialization in not what I though it would be and, in fact, when I try to desarialize the serializated object, an exception is thrown. The
Tag: serialization
Gson showing nested Object as null
Im trying to deserialize objects into JSON, one object contains a nested object. I created an instance of both the nested object (UserAddress)and the one containing it (UserObjectWithNestedObject). However, when I serialize, the nested object is null. So I ran the program in debugger mode to see when it goes null. It seems to be null when I use it
How to Serialize classes, then read them with a modified version of that same class in Java
I am developing a Minecraft plugin which uses a class that I made called customPlayer. When I save the plugin data from a running instance, I put all of these objects into a HashMap<String,customPlayer> and save them with ObjectOutputStream. Loading these classes back into the same version of the plugin works great, but my problem arises when I modify the
Spring Integration: how to configure ObjectToJsonTransformer to add json__TypeId__ with class name instead of canonical name
I am trying to serialize a message (then deserialize it) and I do not want any of the headers json__TypeId__ or json_resolvableType to contain the canonical name of the class. This is because I am sending the message over the network and I consider including the canonical name in the header a security concern. Here is just the relevant parts
Why is there a “topic” parameter in the overridden serialize() method from Serializer interface in org.apache.kafka.common.serialization
I have observed that implementations of the method serialize() of the Serializer<> interface has two parameters: byte[] serialize(String topic, T data) but the method body does not require String topic parameter at all. So why does it exist? Sample Implementation available in the package org.apache.kafka.common.serialization: Answer In this specific implementation, indeed there’s no usage. Yet, this parameter may be used
Java record serialization and repeated calls to canonical constructor
In this post about serializable records it is stated that Deserialization creates a new record object by invoking a record class’s canonical constructor, passing values deserialized from the stream as arguments to the canonical constructor. This is secure because it means the record class can validate the values before assigning them to fields, just like when an ordinary Java program
ObjectMapper writeValueAsString on ‘null’ vs ‘NullNode.getInstance()’
Consider the following statements: String s1 = new ObjectMapper().writeValueAsString(null); String s2 = new ObjectMapper().writeValueAsString(NullNode.getInstance()); In both the cases, serialized values s1 and s2 would be “null” (in String format). Jackson, by default, serializes null objects without any exception. What are the cases where we need to use NullNode, instead of directly serializing null? Answer “null” here is a string, not
Passing arguments to Java class used in @JsonSerialize and @JsonDeserialize
I have a scenario which I am not sure how to google, so I’d open a question myself. If its a duplicate please link it here so I can give that question credit. Anyway, I have a Java Object with fields that I have the following annotations: The business dictates that certain systemDate values in different database have different time
Best way to serialize composite – (design pattern)
I have following java code that is implementation of Composite Design pattern: There are 2 possible composite roots here (CompositeA and CompositeB) and one leaf component (Leaf). Here I define DTOs that will hold serialized data: Now if I use visitor pattern for serialization, I get something like this: and if I use instanceof this is the code that does
Serialization process constantly overwrites itself?
I’m fairly new to java and trying to do some serialization in my project. I have a bunch of objects called Student and I would like to serialize them. The code I’m using for this is as follows: The issue I’m finding is that the students array I’m using has twenty students (S1 – S20). When I attempt to deserialize