@Named
@RequestScoped
public class EChartController implements Serializable {

    private static final long serialVersionUID = 1L;

    private String json;

    @PostConstruct
    public void init() {
        createJsonModel();
    }

    public void createJsonModel() {
        json = "{\n" +
                    "    \"title\": {\n" +
                    "        \"text\": \"Apache ECharts Line Chart\"\n" +
                    "    },\n" +
                    "    \"xAxis\": {\n" +
                    "        \"type\": \"category\",\n" +
                    "        \"data\": [\"Mon\", \"Tue\", \"Wed\", \"Thu\", \"Fri\", \"Sat\", \"Sun\"]\n" +
                    "    },\n" +
                    "    \"yAxis\": {\n" +
                    "        \"type\": \"value\"\n" +
                    "    },\n" +
                    "    \"series\": [\n" +
                    "        {\n" +
                    "            \"name\": \"Some data\",\n" +
                    "            \"data\": [150, 230, 224, 218, 135, 147, 260],\n" +
                    "            \"type\": \"line\"\n" +
                    "        },\n" +
                    "        {\n" +
                    "            \"name\": \"Other data\",\n" +
                    "            \"data\": [110, 260, 124, 118, 235, 100, 200],\n" +
                    "            \"type\": \"line\"\n" +
                    "        }\n" +
                    "    ],\n" +
                    "    \"legend\": {},\n" +
                    "    \"dataZoom\": [\n" +
                    "        {\n" +
                    "            \"type\": \"slider\"\n" +
                    "        }\n" +
                    "    ]\n" +
                    "}";
    }

    public void itemSelect(EChartEvent event) {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        String message = "Clicked " + event.getName()
                    + ", series index " + event.getSeriesIndex()
                    + ", data index " + event.getDataIndex()
                    + ", value " + event.getData();
        FacesMessage facesMessage = new FacesMessage(FacesMessage.SEVERITY_INFO, message, null);
        facesContext.addMessage(null, facesMessage);
    }

    public String getJson() {
        return json;
    }

    public void setJson(String json) {
        this.json = json;
    }
}