Java example source code file (TestBeanInfo.java)

This example Java source code file (TestBeanInfo.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bean, beaninfo, class, error, exception, interruptedexception, javabean, method, non-nls, reflection, runnable, search_path, string, testbeaninfo, threadgroup

The TestBeanInfo.java Java example source code

/**
 * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @bug 6380849
 * @summary Tests BeanInfo finder
 * @author Sergey Malenkov
 */

import beans.FirstBean;
import beans.FirstBeanBeanInfo;
import beans.SecondBean;
import beans.ThirdBean;

import infos.SecondBeanBeanInfo;
import infos.ThirdBeanBeanInfo;

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.lang.reflect.Method;

public class TestBeanInfo implements Runnable {

    private static final String[] SEARCH_PATH = { "infos" }; // NON-NLS: package name

    public static void main(String[] args) throws InterruptedException {
        TestBeanInfo test = new TestBeanInfo();
        test.run();
        // the following tests fails on previous build
        ThreadGroup group = new ThreadGroup("$$$"); // NON-NLS: unique thread name
        Thread thread = new Thread(group, test);
        thread.start();
        thread.join();
    }

    private static void test(Class<?> type, Class expected) {
        BeanInfo actual;
        try {
            actual = Introspector.getBeanInfo(type);
            type = actual.getClass();
            Method method = type.getDeclaredMethod("getTargetBeanInfo"); // NON-NLS: method name
            method.setAccessible(true);
            actual = (BeanInfo) method.invoke(actual);
        }
        catch (Exception exception) {
            throw new Error("unexpected error", exception);
        }
        if ((actual == null) && (expected != null)) {
            throw new Error("expected info is not found");
        }
        if ((actual != null) && !actual.getClass().equals(expected)) {
            throw new Error("found unexpected info");
        }
    }

    private boolean passed;

    public void run() {
        Introspector.flushCaches();

        test(FirstBean.class, FirstBeanBeanInfo.class);
        test(SecondBean.class, null);
        test(ThirdBean.class, null);
        test(ThirdBeanBeanInfo.class, ThirdBeanBeanInfo.class);

        Introspector.setBeanInfoSearchPath(SEARCH_PATH);
        Introspector.flushCaches();

        test(FirstBean.class, FirstBeanBeanInfo.class);
        test(SecondBean.class, SecondBeanBeanInfo.class);
        test(ThirdBean.class, null);
        test(ThirdBeanBeanInfo.class, ThirdBeanBeanInfo.class);
    }
}