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import java.beans.PropertyChangeSupport;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import java.util.Hashtable;
public class PropertyChangeSupportTest implements Runnable {
class Source {
PropertyChangeSupport support = new PropertyChangeSupport(this);
public void addPropertyChangeListener(PropertyChangeListener l) {
support.addPropertyChangeListener(l);
}
public void addPropertyChangeListener(String s, PropertyChangeListener l) {
support.addPropertyChangeListener(s,l);
}
public void removePropertyChangeListener(PropertyChangeListener l) {
support.removePropertyChangeListener(l);
}
public void removePropertyChangeListener(String s, PropertyChangeListener l) {
support.removePropertyChangeListener(s,l);
}
void changeProperty(String name) {
support.firePropertyChange(name,"old","new");
}
}
class Listener implements PropertyChangeListener {
Hashtable numEventsReceived = new Hashtable();
int getNumEvents(String propertyName) {
Integer i = (Integer)numEventsReceived.get(propertyName);
try {
return i.intValue();
} catch(NullPointerException e) {
return 0;
}
}
public void propertyChange(PropertyChangeEvent e) {
Integer i = (Integer)numEventsReceived.get(e.getPropertyName());
try {
int newI = i.intValue() + 1;
numEventsReceived.put(e.getPropertyName(), new Integer(newI));
} catch(NullPointerException exc) {
numEventsReceived.put(e.getPropertyName(), new Integer(1));
}
}
public void reset() {
numEventsReceived = new Hashtable();
}
}
public void setProperties(Source s) {
s.changeProperty("foo");
s.changeProperty("foo");
s.changeProperty("foo");
s.changeProperty("bar");
s.changeProperty("bar");
s.changeProperty("foobar");
}
public void shouldEqual(Listener l, int foo, int bar, int foobar, String testName) {
String whatsWrong = "";
if(l.getNumEvents("foo") != foo) {
whatsWrong += ("foo(" + l.getNumEvents("foo") + ") != " + foo);
}
if(l.getNumEvents("bar") != bar) {
whatsWrong += (" bar(" + l.getNumEvents("bar") + ") != " + bar);
}
if(l.getNumEvents("foobar") != foobar) {
whatsWrong += (" foobar(" + l.getNumEvents("foobar") + ") != " + foobar);
}
if(!whatsWrong.equals("")) {
System.out.println("FAILURE: " + testName + ": " + whatsWrong);
} else {
System.out.println("Success: " + testName);
}
}
public void run() {
Source s = new Source();
/* Test: single multi-property adds */
Listener l = new Listener();
s.addPropertyChangeListener(l);
setProperties(s);
shouldEqual(l, 3, 2, 1, "single multi-property adds");
/* Test: multiple listeners */
Listener l2 = new Listener();
s.addPropertyChangeListener(l2);
setProperties(s);
shouldEqual(l, 6, 4, 2, "multiple listeners-l");
shouldEqual(l2, 3, 2, 1, "multiple listeners-l2");
/* Test: multiple multi-property adds */
s.addPropertyChangeListener(l);
setProperties(s);
shouldEqual(l, 12, 8, 4, "multiple multi-property adds-l");
shouldEqual(l2, 6, 4, 2, "multiple multi-property adds-l2");
/* Test: remove multi-property add */
s.removePropertyChangeListener(l);
setProperties(s);
shouldEqual(l, 15, 10, 5, "remove multi-property add-l");
shouldEqual(l2, 9, 6, 3, "remove multi-property add-l2");
s.removePropertyChangeListener(l);
s.removePropertyChangeListener(l2);
l.reset();
l2.reset();
/* ENABLE THIS IF YOU THINK RESET ISN'T HAPPENING
shouldEqual(l, 0, 0, 0, "RESET-l");
shouldEqual(l2, 0, 0, 0, "RESET-l2");
setProperties(s);
shouldEqual(l, 0, 0, 0, "RESET_AGAIN-l");
shouldEqual(l2, 0, 0, 0, "RESET_AGAIN-l2");
*/
/* Test: single property listener */
s.addPropertyChangeListener("foo", l);
setProperties(s);
shouldEqual(l, 3, 0, 0, "single property listener");
/* Test: multiple different properties */
s.addPropertyChangeListener("bar", l);
setProperties(s);
shouldEqual(l, 6, 2, 0, "multiple different properties");
/* Test: multiple of same property */
s.addPropertyChangeListener("foo", l);
setProperties(s);
shouldEqual(l, 12, 4, 0, "multiple of same property");
/* Test: multiple single-property listeners */
s.addPropertyChangeListener("foo", l2);
setProperties(s);
shouldEqual(l, 18, 6, 0, "multiple single-property listeners-l");
shouldEqual(l2, 3, 0, 0, "multiple single-property listeners-l2");
/* Test: remove single-property add */
s.removePropertyChangeListener("foo", l);
setProperties(s);
shouldEqual(l, 21, 8, 0, "remove single-property add-l");
shouldEqual(l2, 6, 0, 0, "remove single-property add-l2");
s.removePropertyChangeListener("foo", l);
s.removePropertyChangeListener("bar", l);
s.removePropertyChangeListener("foo", l2);
l.reset();
l2.reset();
/* ENABLE THIS IF YOU THINK RESET ISN'T HAPPENING
shouldEqual(l, 0, 0, 0, "RESET-l");
shouldEqual(l2, 0, 0, 0, "RESET-l2");
setProperties(s);
shouldEqual(l, 0, 0, 0, "RESET_AGAIN-l");
shouldEqual(l2, 0, 0, 0, "RESET_AGAIN-l2");
*/
/* Test: multiple- and single-property interaction */
s.addPropertyChangeListener(l);
s.addPropertyChangeListener("foo", l);
setProperties(s);
shouldEqual(l, 6, 2, 1, "multiple- and single-property interaction");
/* Test: multiple- and single-property interaction: multiple-listener removal */
s.removePropertyChangeListener(l);
setProperties(s);
shouldEqual(l, 9, 2, 1, "multiple- and single-property interaction: multiple-listener removal");
/* Test: hasListeners() with multiple cases */
if(s.support.hasListeners("foo")) {
System.out.println("Success: hasListeners() returning true");
} else {
System.out.println("FAILURE: hasListeners() returning true");
}
if(s.support.hasListeners("bar")) {
System.out.println("FAILURE: hasListeners() returning false");
} else {
System.out.println("Success: hasListeners() returning false");
}
s.addPropertyChangeListener(l);
if(s.support.hasListeners("bar")) {
System.out.println("Success: hasListeners() with all-event listeners");
} else {
System.out.println("FAILURE: hasListeners() with all-event listeners");
}
}
public static void main(String[] args) {
new PropertyChangeSupportTest().run();
}
}
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