PrimeFaces 'RequestContextを使用して、POJOをコールバックPARAMとして送信する方法

Question

コールバックPARAMを送信することができ、文字列のようなプリミティブ型のみを送信するだけでなく、完全に機能します。しかし、同じことが最も簡単なPOJOでさえも機能しません。PrimeFaces Guideは、requestcontext.addcallbackparam（）メソッドはPOJOを処理できると述べています。なぜそれが私の訴訟で働いていないのかわかりません。

誰かがそれをやっていますか？

Answer 1

Solution found! ---------------------------------------------------------------------

I did some research and found the answer to this question.

And the solution was to use some JSON library (right now I am using GSON) to convert Java objects to JSON objects.

new Gson().toJson(someJavaObj)

returns string. Just send the string as the param and on the client side using js' eval or some js library's function to turn that into JSON again.

Actually, it was pretty clean and simple.

Sorry I actually did not post the solution. Below is the my solution -

Action method in the backing bean -

public void retrievePieData() { 
    List<String> categories = new ArrayList<String>();

    categories.add("Electronic");
    categories.add("Food");
    categories.add("Liguor");
    categories.add("Stationary");
    categories.add("Mechanical");

    List<Integer> itemCounts = new ArrayList<Integer>();

    itemCounts.add(5);
    itemCounts.add(20);
    itemCounts.add(1);
    itemCounts.add(50);
    itemCounts.add(10);

    RequestContext reqCtx = RequestContext.getCurrentInstance();
    reqCtx.addCallbackParam("categories", new Gson().toJson(categories));
    reqCtx.addCallbackParam("itemCounts", new Gson().toJson(itemCounts));
}

PrimeFaces p:commandButton in the view -

<p:commandLink action="#{pieDataProvider.retrievePieData}" oncomplete="feedPieData(xhr, status, args);"  value="Pie chart demo" update="pieData" />

Javascript function -

function feedPieData(xhr, status, args) {
    var categories = eval('(' + args.categories + ')');
    var itemCounts = eval('(' + args.itemCounts + ')');

    options.xAxis.categories = categories;

    var series = {
         data: []
    };

    series.name = new Date().toString();
    series.data = itemCounts;

    options.series = [series];

    chart = new Highcharts.Chart(options);
}

I would really appreciate and welcome any suggestion or opinion. Thank you!