undefect. CWE-407 — 63 sites patched across 27 ecosystems
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
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test/jdk/java/beans/PropertyChangeSupport/Test4682386.java
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test/jdk/java/beans/PropertyChangeSupport/Test4682386.java
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/*
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* Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4682386
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* @summary Tests for PropertyChangeSupport refactoring
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* @author Mark Davidson
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*/
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import java.beans.Beans;
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import java.beans.IntrospectionException;
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import java.beans.Introspector;
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import java.beans.PropertyChangeEvent;
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import java.beans.PropertyChangeListener;
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import java.beans.PropertyChangeSupport;
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import java.beans.PropertyDescriptor;
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import java.lang.reflect.Method;
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import javax.swing.JButton;
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import javax.swing.JCheckBox;
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import javax.swing.JComboBox;
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import javax.swing.JComponent;
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import javax.swing.JLabel;
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import javax.swing.JList;
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import javax.swing.JMenuItem;
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import javax.swing.JProgressBar;
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import javax.swing.JTextArea;
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import javax.swing.JTextPane;
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import javax.swing.JTextField;
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import javax.swing.JToolBar;
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import javax.swing.JTabbedPane;
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import javax.swing.JTree;
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import javax.swing.JTable;
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/**
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* This class tests the multi-threaded access to PropertyChangeSupport and
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* will also use reflection to test propertyChanges on Swing components.
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* <p/>
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* There is no new functionality from the implementation of this RFE.
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* Semantically, it should be equivalent.
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*/
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public class Test4682386 {
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private static final String FOO = "foo";
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private static final String BAR = "bar";
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private static final int NUM_LISTENERS = 100;
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private static final boolean DEBUG = true;
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private static final Class[] TYPES = {
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JButton.class,
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JCheckBox.class,
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JComboBox.class,
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JLabel.class,
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JList.class,
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JMenuItem.class,
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JProgressBar.class,
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JTextArea.class,
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JTextPane.class,
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JTextField.class,
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JToolBar.class,
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JTabbedPane.class,
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JTree.class,
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JTable.class,
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};
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public static void main(String[] args) {
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testSwingProperties();
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// tests the multi-threaded access
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TestBean bean = new TestBean();
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Thread add = new Thread(new AddThread(bean));
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Thread remove = new Thread(new RemoveThread(bean));
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Thread prop = new Thread(new PropertyThread(bean));
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add.start();
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prop.start();
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remove.start();
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}
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/**
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* Should be exectuted with $JAVA_HOME/lib/dt.jar in the classpath
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* so that there will be a lot more bound properties.
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* <p/>
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* This test isn't really appropriate for automated testing.
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*/
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private static void testSwingProperties() {
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long start = System.currentTimeMillis();
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for (Class type : TYPES) {
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try {
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Object bean = Beans.instantiate(type.getClassLoader(), type.getName());
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JComponent comp = (JComponent) bean;
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for (int k = 0; k < NUM_LISTENERS; k++) {
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comp.addPropertyChangeListener(new PropertyListener());
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}
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for (PropertyDescriptor pd : getPropertyDescriptors(type)) {
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if (pd.isBound()) {
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if (DEBUG) {
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System.out.println("Bound property found: " + pd.getName());
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}
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Method read = pd.getReadMethod();
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Method write = pd.getWriteMethod();
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try {
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write.invoke(
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bean,
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getValue(
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pd.getPropertyType(),
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read.invoke(bean)));
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} catch (Exception ex) {
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// do nothing - just move on.
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if (DEBUG) {
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System.out.println("Reflective method invocation Exception for " + type + " : " + ex.getMessage());
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}
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}
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}
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}
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} catch (Exception ex) {
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// do nothing - just move on.
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if (DEBUG) {
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System.out.println("Exception for " + type.getName() +
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" : " + ex.getMessage());
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}
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}
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}
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System.out.println("Exec time (ms): " + (System.currentTimeMillis() - start));
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}
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/**
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* Gets a fake value from a type and old value;
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*/
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public static Object getValue(Class type, Object value) {
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if (String.class.equals(type)) {
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return "test string";
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}
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if (value instanceof Integer) {
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Integer i = (Integer) value;
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return Integer.valueOf(i + 1);
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}
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if (value instanceof Boolean) {
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Boolean b = (Boolean) value;
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return Boolean.valueOf(!b);
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}
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return null;
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}
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public static PropertyDescriptor[] getPropertyDescriptors(Class type) {
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try {
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return Introspector.getBeanInfo(type).getPropertyDescriptors();
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} catch (IntrospectionException exception) {
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throw new Error("unexpected exception", exception);
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}
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}
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private static void sleep(long ms) {
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try {
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Thread.sleep(ms);
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} catch (InterruptedException exception) {
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}
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}
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private static class AddThread implements Runnable {
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private final TestBean bean;
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AddThread(TestBean bean) {
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this.bean = bean;
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}
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public void run() {
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for (int i = 0; i < NUM_LISTENERS; i++) {
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for (int j = 0; j < 10; j++) {
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this.bean.addPropertyChangeListener(new PropertyListener());
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}
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if (DEBUG) {
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System.out.println("10 listeners added");
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}
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sleep(25L);
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}
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}
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}
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private static class RemoveThread implements Runnable {
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private final TestBean bean;
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RemoveThread(TestBean bean) {
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this.bean = bean;
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}
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public void run() {
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for (int k = 0; k < NUM_LISTENERS; k++) {
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sleep(100L);
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PropertyChangeListener[] listeners = this.bean.getPropertyChangeListners();
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for (int i = listeners.length - 1; i >= 0; i--) {
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this.bean.removePropertyChangeListener(listeners[i]);
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}
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if (DEBUG) {
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System.out.println(listeners.length + " listeners removed");
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}
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}
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}
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}
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private static class PropertyThread implements Runnable {
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private final TestBean bean;
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PropertyThread(TestBean bean) {
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this.bean = bean;
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}
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public void run() {
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for (int i = 0; i < NUM_LISTENERS; i++) {
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boolean flag = this.bean.isFoo();
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this.bean.setFoo(!flag);
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this.bean.setBar(Boolean.toString(flag));
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if (DEBUG) {
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System.out.println("Executed property changes");
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}
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sleep(40L);
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}
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}
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}
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/**
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* Handler for the property change events.
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*/
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private static class PropertyListener implements PropertyChangeListener {
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public void propertyChange(PropertyChangeEvent event) {
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// blank since this should execute as fast as possible.
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}
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}
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/**
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* A simple bean to test multi-threaded acccess to the listeners.
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*/
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public static class TestBean {
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private final PropertyChangeSupport pcs = new PropertyChangeSupport(this);
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private boolean foo;
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private String bar;
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public void addPropertyChangeListener(PropertyChangeListener listener) {
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this.pcs.addPropertyChangeListener(listener);
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}
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public void removePropertyChangeListener(PropertyChangeListener listener) {
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this.pcs.removePropertyChangeListener(listener);
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}
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public PropertyChangeListener[] getPropertyChangeListners() {
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return this.pcs.getPropertyChangeListeners();
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}
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public boolean isFoo() {
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return this.foo;
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}
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public void setFoo(boolean foo) {
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boolean old = this.foo;
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this.foo = foo;
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this.pcs.firePropertyChange(FOO, old, foo);
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}
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public String getBar() {
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return this.bar;
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}
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public void setBar(String bar) {
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String old = this.bar;
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this.bar = bar;
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this.pcs.firePropertyChange(BAR, old, bar);
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}
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}
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}
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