When making a POJO in Firebase, can you use ServerValue.TIMESTAMP?

Question

When you\'re making a Plain Old Java Object that\'s meant to be serialized from and deserialized to Firebase, is there a way to use the ServerValue.TIMESTAMP va

Answer 1

I wanted to improve Lyla's answer a little bit. First, I would like to get rid of public methods public HashMap getDateLastChanged() public HashMap getDateCreated(). In order to do that you can mark dateCreated property with @JsonProperty annotation. Another possible way to do so is to change property detection like that: @JsonAutoDetect(fieldVisibility = Visibility.ANY, getterVisibility = Visibility.NONE, setterVisibility = Visibility.NONE)
Second, I don't understand why we need to put ServerValue.TIMESTAMP into HashMap while we can just store them as property. So my final code is:

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.firebase.client.ServerValue;

public class ShoppingList {
    private String listName;
    private String owner;
    @JsonProperty
    private Object created;

    public ShoppingList() {
    }

    public ShoppingList(String listName, String owner) {
        this.listName = listName;
        this.owner = owner;
        this.created = ServerValue.TIMESTAMP;
    }

    public String getListName() {
        return listName;
    }

    public String getOwner() {
        return owner;
    }

    @JsonIgnore
    public Long getCreatedTimestamp() {
        if (created instanceof Long) {
            return (Long) created;
        }
        else {
            return null;
        }
    }

    @Override
    public String toString() {
        return listName + " by " + owner;
    }

}