JsonIgnore and JsonProperty not behaving as I expect - jackson

Question

I have a simple class that I want to deserialize into JSON using Jackson. I want to rename one field logically in my JSON and the other I want to have the same name as defined in my Java class.
#JsonSerialize(include = Inclusion.NON_NULL)
public static class Manifest {
public Manifest(){
this.files = new ArrayList<String>();
}
#JsonProperty("manifest-version")
private String manifestVersion;
private ArrayList<String> files;
#JsonIgnore
public String getManifestVersion() {
return manifestVersion;
}
#JsonIgnore
public void setManifestVersion(String manifestVersion) {
this.manifestVersion = manifestVersion;
}
public ArrayList<String> getFiles() {
return files;
}
public void setFiles(ArrayList<String> files) {
this.files = files;
}
public void addFile(String file) {
this.files.add(file);
}
}
I'm expecting the #JsonIgnore for the getter/setter to cause manifestVersion to not become a JSON property (But should create a JSON property for manifest-version, where I have the #JsonProperty defined.
Expected output is
{
"manifest-version" : "2.0"
}
Actual output is
{
"manifest-version" : "2.0",
"manifestVersion":"2.0"
}
Any help would be appreciated.

Answer 1

I tried executing your code with Jackson 2.2 and i'm getting the expected output
import java.util.ArrayList;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize.Inclusion;
public class Test {
#JsonSerialize(include = Inclusion.NON_NULL)
public static class Manifest {
public Manifest(){
this.files = new ArrayList<String>();
}
#JsonProperty("manifest-version")
private String manifestVersion;
private ArrayList<String> files;
#JsonIgnore
public String getManifestVersion() {
return manifestVersion;
}
#JsonIgnore
public void setManifestVersion(String manifestVersion) {
this.manifestVersion = manifestVersion;
}
public ArrayList<String> getFiles() {
return files;
}
public void setFiles(ArrayList<String> files) {
this.files = files;
}
public void addFile(String file) {
this.files.add(file);
}
}
public static void main(String[] args) throws JsonProcessingException {
ObjectMapper obj = new ObjectMapper();
Manifest m = new Manifest();
m.setManifestVersion("2.0");
System.out.println(obj.writeValueAsString(m));
}
}
Output: {"files":[],"manifest-version":"2.0"}
what version of jackson are you using?