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How to identify the missing type id in Jackson error?


How to identify the missing type id in Jackson error?

By : user3100199
Date : January 12 2021, 01:40 AM
This might help you UPDATE:
BusinessContact class should be annotated with @JsonTypeName("business") and PersonContact class with @JsonTypeName("personal") instead of @JsonTypeName("type") because you shoud define specific type in inheritors.
code :
public PersonContact(){}
public class ContactsWrapper
{
   private List<BaseContact> allContacts;
   private int size;

   public List<BaseContact> getAllContacts()
   {
      return allContacts;
   }

   public void setAllContacts(List<BaseContact> allContacts)
   {
      this.allContacts = allContacts;
   }

   public int getSize()
   {
      return size;
   }

   public void setSize(int size)
   {
      this.size = size;
   }
}
ContactsWrapper contactsWrapper = new ObjectMapper().readerFor(ContactsWrapper.class).readValue(new File(fn));
abl = contactsWrapper.getAllContacts();


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error C4430: missing type specifier / error C2143: syntax error : missing ';' before '*'

error C4430: missing type specifier / error C2143: syntax error : missing ';' before '*'


By : Yavuz Tufan
Date : March 29 2020, 07:55 AM
will be helpful for those in need I am getting both errors on the same line. Bridge *first in the Lan class. What am i missing? , Declare Bridge before Lan
code :
#include <stdio.h>
#include <stdlib.h>
#include <iostream>

using namespace std;

class Bridge;

class Lan{
    Bridge *first;
    Bridge *second;
    Host hostList[10];
    int id;
};

class Bridge{
    Lan lanList[5];
};
Jackson 3.1.1 Missing Type ID of Subtype Exception for Polymorphic Type of List?

Jackson 3.1.1 Missing Type ID of Subtype Exception for Polymorphic Type of List?


By : user3061585
Date : December 23 2020, 06:01 AM
Hope this helps In your json you are missing the BTRFSPhysicalLocationItem - just think about it - how Jackson should know what implementation do you expect?
It should look like
code :
[
    {
        "BTRFSPhysicalLocationItem": "Subvolume",
        "name": "WanderingEcho",
        "location":"file:///home/sarah/NetBeansProjects/WanderingEcho/"
    }
]
@JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.PROPERTY, property = "BTRFSPhysicalLocationItem")
public class SubvolumeList extends ArrayList<Subvolume> {}
Missing type id when trying to resolve subtype Jackson ION desrialization even after registering subtypes

Missing type id when trying to resolve subtype Jackson ION desrialization even after registering subtypes


By : shruti
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Your example work with standard JSON with ObjectMapper however it fails when serialization format is switched to Ion with IonObjectMapper. Tested your example with com.fasterxml.jackson.dataformat:jackson-dataformat-ion:2.9.7, fails with the same exception.
There is an open issue [avro] Support @JsonSubTypes in schema generation and serialization #11 which implies that not all binary dataformats support subtypes. Open pull request [Ion] Better support for Ion type annotations. #109 implies that @JsonTypeInfo doesn't work when using Ion yet.
Missing artifact com.fasterxml.jackson.core:jackson-databind:bundle:2.9.8

Missing artifact com.fasterxml.jackson.core:jackson-databind:bundle:2.9.8


By : anton troyanov
Date : March 29 2020, 07:55 AM
will help you Working with Jackson library, it came following error in Eclipse 4.9.0 version , The solution was from generated dependencies
code :
<dependencies>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.9.8</version>
    <type>bundle</type>
</dependency>
<type>bundle</type>
Missing class: com.fasterxml.jackson.core.type.TypeReference. R8:Warning

Missing class: com.fasterxml.jackson.core.type.TypeReference. R8:Warning


By : Gionatan Del Giudice
Date : October 04 2020, 11:00 AM
I wish did fix the issue. If you're super sure you will remember this line if you include Jackson later in your project, this does the trick (add it in your project's proguard-project.[txt|pro] file):
code :
-dontwarn com.fasterxml.jackson.core.type.TypeReference
  List<ProguardConfigurationRule> synthesizedProguardRules = new ArrayList<>();
  timing.begin("Strip unused code");
  Set<DexType> classesToRetainInnerClassAttributeFor = null;
  try {
    Set<DexType> missingClasses = appView.appInfo().getMissingClasses();
    missingClasses = filterMissingClasses(
        missingClasses, options.getProguardConfiguration().getDontWarnPatterns());
    if (!missingClasses.isEmpty()) {
      missingClasses.forEach(
          clazz -> {
            options.reporter.warning(
                new StringDiagnostic("Missing class: " + clazz.toSourceString()));
          });
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