/*
 * The MIT License
 *
 * Copyright (c) 2015 Misakura.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package jp.gr.java_conf.kgd.example.blog.crossgenerics;

import com.badlogic.gdx.scenes.scene2d.Actor;
import com.badlogic.gdx.scenes.scene2d.ui.Table;
import com.badlogic.gdx.scenes.scene2d.utils.Layout;

public class WidgetExample {

    public static <T extends Actor & Layout> void doSomething1(T widget) {
        // Actorのメソッド。Layoutでは使えない。
        widget.act(0);

        // Layoutのメソッド。Actorでは使えない。
        widget.getPrefWidth();
    }

    // 一応、ジェネリクス無しで実現する場合はこんな風になる。
    // （actorViewとlayoutViewに同じインスタンスを渡して呼び出す）
    public static void doSomething2(Actor actorView, Layout layoutView) {
        // 違うインスタンスが渡せてしまうので、チェックする
        if (actorView != layoutView) {
            throw new IllegalArgumentException("actorViewとlayoutViewは同じインスタンスでなければいけません");
        }

        // 以下、同じ処理
        actorView.act(0);
        layoutView.getPrefWidth();
    }

    public static void main(String[] args) {
        // WidgetGroupの派生クラスでScene2DのエースTableさんです！
        Table table = new Table();

        // こんな風に呼べる
        doSomething1(table);

        // 一応、ジェネリクスを使わなくてもこんな感じの呼び出しで実現できる
        doSomething2(table, table); // ←おかしすぎんよ～
    }
}

@@ -1275,21 +1275,77 @@
 ne2d.ui.
-Table
+Widget;%0Aimport com.badlogic.gdx.scenes.scene2d.ui.WidgetGroup
 ;%0Aimport
@@ -2107,83 +2107,89 @@
     
- //
  Widget
-Group%E3%81%AE%E6%B4%BE%E7%94%9F%E3%82%AF%E3%83%A9%E3%82%B9%E3%81%A7Scene2D%E3%81%AE%E3%82%A8%E3%83%BC%E3%82%B9Table%E3%81%95%E3%82%93%E3%81%A7%E3%81%99%EF%BC%81%0A        Table table = new Table
+ widget = new Widget();%0A%0A        WidgetGroup widgetGroup = new WidgetGroup
 ();%0A
@@ -2200,21 +2200,21 @@
      // 
-%E3%81%93%E3%82%93%E3%81%AA%E9%A2%A8%E3%81%AB
+%E3%81%A9%E3%81%A3%E3%81%A1%E3%81%A7%E3%82%82
 %E5%91%BC%E3%81%B9%E3%82%8B%0A    
@@ -2230,21 +2230,57 @@
 ething1(
-table
+widget);%0A        doSomething1(widgetGroup
 );%0A%0A    
@@ -2344,27 +2344,90 @@
 ng2(
-table, table); // %E2%86%90
+widget, widget);%0A        doSomething2(widgetGroup, widgetGroup);%0A        // %E3%81%A7%E3%82%82%E3%81%95%E3%81%99%E3%81%8C%E3%81%AB
 %E3%81%8A%E3%81%8B%E3%81%97%E3%81%99

change 例をWidgetとWidgetGroup両方で示すように変更。