Item.java

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package edu.wpi.rail.jinteractiveworld.ros.msgs.interactiveworldmsgs;

import javax.json.Json;
import javax.json.JsonObject;

import edu.wpi.rail.jrosbridge.messages.Message;

public class Item extends Message {

        public static final String FIELD_NAME = "name";

        public static final String FIELD_WIDTH = "width";

        public static final String FIELD_HEIGHT = "height";

        public static final String TYPE = "interactive_world_msgs/Item";

        private final String name;
        private final double width, height;

        public Item() {
                this("", 0, 0);
        }

        public Item(String name, double width, double height) {
                // build the JSON object
                super(Json.createObjectBuilder().add(Item.FIELD_NAME, name)
                                .add(Item.FIELD_WIDTH, width)
                                .add(Item.FIELD_HEIGHT, height).build(), Item.TYPE);
                this.name = name;
                this.width = width;
                this.height = height;
        }

        public String getName() {
                return this.name;
        }

        public double getWidth() {
                return this.width;
        }

        public double getHeight() {
                return this.height;
        }

        @Override
        public Item clone() {
                return new Item(this.name, this.width, this.height);
        }

        public static Item fromJsonString(String jsonString) {
                // convert to a message
                return Item.fromMessage(new Message(jsonString));
        }

        public static Item fromMessage(Message m) {
                // get it from the JSON object
                return Item.fromJsonObject(m.toJsonObject());
        }

        public static Item fromJsonObject(JsonObject jsonObject) {
                // check the fields
                String name = jsonObject.containsKey(Item.FIELD_NAME) ? jsonObject
                                .getString(Item.FIELD_NAME) : "";
                double width = jsonObject.containsKey(Item.FIELD_WIDTH) ? jsonObject
                                .getJsonNumber(Item.FIELD_WIDTH).doubleValue() : 0.0;
                double height = jsonObject.containsKey(Item.FIELD_HEIGHT) ? jsonObject
                                .getJsonNumber(Item.FIELD_HEIGHT).doubleValue() : 0.0;
                return new Item(name, width, height);
        }
}