Java example source code file (Test4634390.java)

This example Java source code file (Test4634390.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, classes, error, gui, indexedpropertydescriptor, introspectionexception, javabean, method, propertydescriptor, reflection, string, swing, test4634390

The Test4634390.java Java example source code

/*
 * Copyright (c) 2003, 2007, 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 4634390
 * @summary Tests contract for equals and hashCode methods
 * @author Mark Davidson
 */

import java.beans.IndexedPropertyDescriptor;
import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import javax.swing.*;

public class Test4634390 {

    private static final Class[] CLASSES = {
            JButton.class,
            JDialog.class,
            JMenu.class,
            JPanel.class,
            JProgressBar.class,
            JSlider.class,
            JTable.class,
            JTree.class,
            JComboBox.class,
            JToolBar.class,
            JTabbedPane.class,
    };

    public static void main(String[] args) {
        for (Class type : CLASSES) {
            test(type);
        }
    }

    private static void test(Class type) {
        for (PropertyDescriptor pd : BeanUtils.getPropertyDescriptors(type)) {
            PropertyDescriptor pdCopy = create(pd);
            if (pdCopy != null) {
                // XXX - hack! The Introspector will set the bound property
                // since it assumes that propertyChange event set descriptors
                // infers that all the properties are bound
                pdCopy.setBound(pd.isBound());

                String name = pd.getName();
                System.out.println(" - " + name);

                if (!compare(pd, pdCopy))
                    throw new Error("property delegates are not equal");

                if (!pd.equals(pdCopy))
                    throw new Error("equals() failed");

                if (pd.hashCode() != pdCopy.hashCode())
                    throw new Error("hashCode() failed");
            }
        }
    }

    private static PropertyDescriptor create(PropertyDescriptor pd) {
        try {
            if (pd instanceof IndexedPropertyDescriptor) {
                IndexedPropertyDescriptor ipd = (IndexedPropertyDescriptor) pd;
                return new IndexedPropertyDescriptor(
                        ipd.getName(),
                        ipd.getReadMethod(),
                        ipd.getWriteMethod(),
                        ipd.getIndexedReadMethod(),
                        ipd.getIndexedWriteMethod());
            } else {
                return new PropertyDescriptor(
                        pd.getName(),
                        pd.getReadMethod(),
                        pd.getWriteMethod());
            }
        }
        catch (IntrospectionException exception) {
            exception.printStackTrace();
            return null;
        }
    }

    private static boolean compare(PropertyDescriptor pd1, PropertyDescriptor pd2) {
        if (!compare(pd1.getReadMethod(), pd2.getReadMethod())) {
            System.out.println("read methods not equal");
            return false;
        }
        if (!compare(pd1.getWriteMethod(), pd2.getWriteMethod())) {
            System.out.println("write methods not equal");
            return false;
        }
        if (pd1.getPropertyType() != pd2.getPropertyType()) {
            System.out.println("property type not equal");
            return false;
        }
        if (pd1.getPropertyEditorClass() != pd2.getPropertyEditorClass()) {
            System.out.println("property editor class not equal");
            return false;
        }
        if (pd1.isBound() != pd2.isBound()) {
            System.out.println("bound value not equal");
            return false;
        }
        if (pd1.isConstrained() != pd2.isConstrained()) {
            System.out.println("constrained value not equal");
            return false;
        }
        return true;
    }

    private static boolean compare(Method m1, Method m2) {
        if ((m1 == null) && (m2 == null)) {
            return true;
        }
        if ((m1 == null) || (m2 == null)) {
            return false;
        }
        return m1.equals(m2);
    }
}