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PropertyChangeMulticaster (DbUnit 2.1 API)
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org.dbunit.util.concurrent</FONT>
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Class PropertyChangeMulticaster</H2>
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java.lang.Object
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><B>org.dbunit.util.concurrent.PropertyChangeMulticaster</B>
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<DT><B>All Implemented Interfaces:</B> <DD>java.io.Serializable</DD>
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<DT>public class <B>PropertyChangeMulticaster</B><DT>extends java.lang.Object<DT>implements java.io.Serializable</DL>
<P>
This class is interoperable with java.beans.PropertyChangeSupport, but relies on a streamlined copy-on-write scheme similar to that used in CopyOnWriteArrayList. This leads to much better performance in most event-intensive programs. It also adheres to clarified semantics of add and remove operations. <p> <b>Sample usage.</b> <pre> class Thing { protected Color myColor = Color.red; // an example property protected PropertyChangeMulticaster listeners = new PropertyChangeMulticaster(this); // registration methods, including: void addListener(PropertyChangeListener l) { // Use the `ifAbsent' version to avoid duplicate notifications listeners.addPropertyChangeListenerIfAbsent(l); } public synchronized Color getColor() { // accessor return myColor; } // internal synchronized state change method; returns old value protected synchronized Color assignColor(Color newColor) { Color oldColor = myColor; myColor = newColor; return oldColor; } public void setColor(Color newColor) { // atomically change state Color oldColor = assignColor(newColor); // broadcast change notification without holding synch lock listeners.firePropertyChange("color", oldColor, newColor); } } </pre> <p>[<a href="http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html"> Introduction to this package. </a>]
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<DT><B>See Also:</B><DD><A HREF="../../../../serialized-form.html#org.dbunit.util.concurrent.PropertyChangeMulticaster">Serialized Form</A></DL>
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<CODE>protected java.util.HashMap</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/dbunit/util/concurrent/PropertyChangeMulticaster.html#children">children</A></B></CODE>
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HashMap for managing listeners for specific properties.</TD>
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<CODE>protected java.beans.PropertyChangeListener[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/dbunit/util/concurrent/PropertyChangeMulticaster.html#listeners">listeners</A></B></CODE>
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The array of listeners.</TD>
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<CODE>protected java.lang.Object</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/dbunit/util/concurrent/PropertyChangeMulticaster.html#source">source</A></B></CODE>
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The object to be provided as the "source" for any generated events.</TD>
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<TD><CODE><B><A HREF="../../../../org/dbunit/util/concurrent/PropertyChangeMulticaster.html#PropertyChangeMulticaster(java.lang.Object)">PropertyChangeMulticaster</A></B>(java.lang.Object sourceBean)</CODE>
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Constructs a <code>PropertyChangeMulticaster</code> object.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/dbunit/util/concurrent/PropertyChangeMulticaster.html#addPropertyChangeListener(java.beans.PropertyChangeListener)">addPropertyChangeListener</A></B>(java.beans.PropertyChangeListener listener)</CODE>
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Add a VetoableChangeListener to the listener list.</TD>
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<CODE> void</CODE></FONT></TD>
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Add a PropertyChangeListener for a specific property.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/dbunit/util/concurrent/PropertyChangeMulticaster.html#addPropertyChangeListenerIfAbsent(java.beans.PropertyChangeListener)">addPropertyChangeListenerIfAbsent</A></B>(java.beans.PropertyChangeListener listener)</CODE>
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Add a PropertyChangeListener to the listener list if it is not already present.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/dbunit/util/concurrent/PropertyChangeMulticaster.html#addPropertyChangeListenerIfAbsent(java.lang.String, java.beans.PropertyChangeListener)">addPropertyChangeListenerIfAbsent</A></B>(java.lang.String propertyName, java.beans.PropertyChangeListener listener)</CODE>
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Add a PropertyChangeListener for a specific property, if it is not already registered.</TD>
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