Convert LinkedHashMap to an object in Java

Question

I\'ll start directly with my question and later on I give more background information.

Simple: I hava a LinkedHashMap

Answer 1

Reflection is the only way for setting properties of generic unknown object.
You can find everything you will need in the docs.

Answer 2

You can create two classes

@XmlAccessorType(XmlAccessType.FIELD) 
public class Document {
    @XmlElement
    private String title;
    @XmlElement
    private String id;
    @XmlElement
    private int version;
}  


@XmlAccessorType(XmlAccessType.FIELD)
public class MapJson {
    @XmlElement
    private LinkedHashMap<String, String> documents; 
}  

and cobvert Object to JSON usingg
Jackson

new org.codehaus.jackson.map.ObjectMapper().writeValueAsString(instanceofMapJson);  

Google JSON

new com.google.gson.Gson().toJson(instanceofMapJson);  

PS. Using google json, you can remove xml annotations from your classes