Category_Json.java

package kb.howtokb.wkhobject;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;

public class Category_Json {
	private int id;
	private String data;
	private int parent;
	private List<Integer> children;
	private List<Integer> rootpath;
	
	public Category_Json(int id, String data, int parent, ArrayList<Integer> children, ArrayList<Integer> root){
		this.id = id;
		this.data = data;
		this.parent = parent;
		this.children = children;
		this.rootpath = root;
	}
	
	public int getID(){
		return id;
	}
	public void setID(int id){
		this.id = id;
	}
	
	public String getData(){
		return data;
	}
	public void setData(String data){
		this.data = data;
	}
	
	public int getParent(){
		return parent;
	}
	public void setParent(int id){
		parent = id;
	}
	
	public List<Integer> getChildren(){
		return children;
	}
	public void setChildren(ArrayList<Integer> child){
		children = child;
	}
	
	public List<Integer> getRootpath(){
		return rootpath;
	}
	public void setRootpath(ArrayList<Integer> root){
		rootpath = root;
	}
	
	
	// ======================================================================
	/**
	 * Return Json array object that convert from list of children
	 * @return  JSONArray
	 */
	@SuppressWarnings("unchecked")
	public JSONArray childrentoJsonArray(){
		JSONArray category = new JSONArray();
		if (getChildren().size() > 0){
			for (int i=0; i<getChildren().size(); i++){
				category.add(getChildren().get(i));
			}
		}
		return category;
	}
	
	// ======================================================================
	/**
	 * Return Json array object that convert from rootpath
	 * @return  JSONArray
	 */
	@SuppressWarnings("unchecked")
	public JSONArray rootpathtoJsonArray(){
		JSONArray category = new JSONArray();
		if (getRootpath().size() > 0){
			for (int i=0; i<getRootpath().size(); i++){
				category.add(getRootpath().get(i));
			}
		}
		return category;
	}
	
	// ======================================================================
	/**
	 * Return Json object that convert from a category
	 * @return  JSONArray
	 */
	@SuppressWarnings("unchecked")
	public JSONObject categoryToJsonObject(){
		JSONObject obj = new JSONObject();
		obj.put("data", getData());
		obj.put("id", getID());
		obj.put("parent", getParent());
		obj.put("children", childrentoJsonArray());
		obj.put("rootpath", rootpathtoJsonArray());
		return obj;
	}
	
	static final JSONParser parser = new JSONParser();
	public static Category_Json fromJson(String json) throws ParseException{
		Object obj = parser.parse(json);
		JSONObject jsonObject = (JSONObject) obj;
		return jsontoCategory(jsonObject);		
	}
	
	private static Category_Json jsontoCategory(JSONObject obj){
		String data = (String) obj.get("data");
		int id = (int) (long) obj.get("id");
		int parent = (int) (long) obj.get("parent");
		
		//System.out.println(categoryid.get(parent));
		ArrayList<Integer> children = new ArrayList<>();
		JSONArray childrenJ = (JSONArray) obj.get("children");
		Iterator<Long> iteratorC = childrenJ.iterator();
		while (iteratorC.hasNext()) {
			children.add((int) (long) iteratorC.next());
		}
		
		ArrayList<Integer> rootpath = new ArrayList<>();
		JSONArray rootpathJ = (JSONArray) obj.get("rootpath");
		Iterator<Long> iteratorR = rootpathJ.iterator();
		while (iteratorR.hasNext()) {
			rootpath.add((int) (long) iteratorR.next());
		}
		
		//System.out.println("test");
		Category_Json newcate = new Category_Json(id, 
				data, parent , children, rootpath);
		return newcate;
	}
	
}