How to parse recursive JSON object using JAXB - json

Question

Below is my JSON, how to parse it using jaxb, note the depth and key of categories would change
{
"categories":{
"categoryHierarchy":[
{
"hierarchy":{
"SDG--1513417390":{
"SD-1501363638":{
"D-HS-MM4":{
"CL-HS-MM4-DEFAULT":{
"C-HS-MM4-MM0203":{
}
}
}
}
}
},
"precedence":1
}
]
}
}

Answer 1

After trying multiple things I was able to parse the recursive category structure.
package com.example;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.pearson.aem.aemcore.pim.dto.com.example.Example;
class Parser{
private transient static ObjectMapper jsonMapper;
public static void main (String [] args) throws IOException
{
jsonMapper = new ObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
String response = "{\"categoryHierarchy\":[{\"hierarchy\":{\"SDG--1513417390\":{\"SD-1501363638\":{\"D-HS-MM4\":{\"CL-HS-MM4-DEFAULT\":{\"C-HS-MM4-MM0203\":{}}}}}},\"precedence\":1}]}";
InputStream stream = new ByteArrayInputStream(response.getBytes());
Example ex = unmarshalJson(stream, Example.class);
System.out.println(ex.getCategoryHierarchy().get(0).getHierarchy1().getAdditionalProperties());
//System.out.println(ex.getCategoryHierarchy().get(0).getHierarchy().getAdditionalProperties().get("SDG--1513417390").keySet.iterator().next());
}
public static <T> T unmarshalJson(final InputStream result, final Class<T> declaredType) throws IOException
{
return (T) jsonMapper.readValue(result, declaredType);
}
}
----------------
package com.example;
import java.util.List;
import java.util.Map;
import javax.xml.bind.annotation.XmlElement;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.pearson.aem.aemcore.pim.dto.CategoryElementDTO;
#JsonInclude(JsonInclude.Include.NON_NULL)
public class Example
{
#XmlElement(
name = "categoryHierarchy")
private List<CategoryHierarchy> categoryHierarchy;
#XmlElement(
name = "relatedCategories")
private Map<String, CategoryElementDTO> relatedCategories;
public List<CategoryHierarchy> getCategoryHierarchy()
{
return categoryHierarchy;
}
public void setCategoryHierarchy(List<CategoryHierarchy> categoryHierarchy)
{
this.categoryHierarchy = categoryHierarchy;
}
public Map<String, CategoryElementDTO> getRelatedCategories()
{
return relatedCategories;
}
public void setRelatedCategories(Map<String, CategoryElementDTO> relatedCategories)
{
this.relatedCategories = relatedCategories;
}
}
------------
package com.example;
public class CategoryHierarchy
{
private Hierarchy hierarchy;
private Integer precedence;
public Hierarchy getHierarchy()
{
return hierarchy;
}
public void setHierarchy(Hierarchy hierarchy)
{
this.hierarchy = hierarchy;
}
public Integer getPrecedence()
{
return precedence;
}
public void setPrecedence(Integer precedence)
{
this.precedence = precedence;
}
}
---------------
package com.example;
import java.util.HashMap;
import java.util.Map;
import com.fasterxml.jackson.annotation.JsonAnyGetter;
import com.fasterxml.jackson.annotation.JsonAnySetter;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonInclude;
#JsonInclude(JsonInclude.Include.NON_NULL)
public class Hierarchy
{
#JsonIgnore
private Map<String, Object> additionalProperties = new HashMap<String, Object>();
#JsonAnyGetter
public Map<String, Object> getAdditionalProperties()
{
return this.additionalProperties;
}
#JsonAnySetter
public void setAdditionalProperty(String name, Object value)
{
this.additionalProperties.put(name, value);
}
}