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1 files changed, 189 insertions, 0 deletions

diff --git a/libjava/classpath/java/beans/PropertyChangeEvent.java b/libjava/classpath/java/beans/PropertyChangeEvent.java
new file mode 100644
index 000000000..3e3f948e3
--- /dev/null
+++ b/libjava/classpath/java/beans/PropertyChangeEvent.java
@@ -0,0 +1,189 @@
+/* PropertyChangeEvent.java -- describes a change in a property
+   Copyright (C) 1998, 2000, 2002, 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.beans;
+
+import java.util.EventObject;
+
+/**
+ * PropertyChangeEvents are fired in the PropertyChange and VetoableChange
+ * event classes.  They represent the old and new values as well as the
+ * source Bean. If the old or new value is a primitive type, it must be
+ * wrapped in the appropriate wrapper type (java.lang.Integer for int, etc.,
+ * etc.).
+ *
+ * <p>If the old or new values are unknown (although why that would be I do
+ * not know), they may be null. Also, if the set of properties itself has
+ * changed, the name should be null, and the old and new values may also be
+ * null. Right now Sun put in a propagationId, reserved for future use. Read
+ * the comments on the constructor and on setPropagationId for more
+ * information.
+ *
+ * @author John Keiser
+ * @author Eric Blake (ebb9@email.byu.edu)
+ * @since 1.1
+ * @status udpated to 1.4
+ */
+public class PropertyChangeEvent extends EventObject
+{
+  /**
+   * Compatible with JDK 1.1+.
+   */
+  private static final long serialVersionUID = 7042693688939648123L;
+
+  /**
+   * The name of the property that changed, may be null. Package visible for
+   * use by PropertyChangeSupport.
+   *
+   * @serial the changed property name
+   */
+  final String propertyName;
+
+  /**
+   * The new value of the property, may be null. Package visible for use by
+   * PropertyChangeSupport.
+   *
+   * @serial the new property value
+   */
+  final Object newValue;
+
+  /**
+   * The old value of the property, may be null. Package visible for use by
+   * PropertyChangeSupport.
+   *
+   * @serial the old property value
+   */
+  final Object oldValue;
+
+  /**
+   * The propagation ID, reserved for future use. May be null.
+   *
+   * @see #getPropagationId()
+   * @serial the Propagation ID
+   */
+  private Object propagationId;
+
+  /**
+   * Create a new PropertyChangeEvent. Remember that if you received a
+   * PropertyChangeEvent and are sending a new one, you should also set the
+   * propagation ID from the old PropertyChangeEvent.
+   *
+   * @param source the Bean containing the property
+   * @param propertyName the property's name
+   * @param oldVal the old value of the property
+   * @param newVal the new value of the property
+   * @throws IllegalArgumentException if source is null
+   */
+  public PropertyChangeEvent(Object source, String propertyName,
+                             Object oldVal, Object newVal)
+  {
+    super(source);
+    this.propertyName = propertyName;
+    oldValue = oldVal;
+    newValue = newVal;
+  }
+
+  /**
+   * Get the property name. May be null if multiple properties changed.
+   *
+   * @return the property name
+   */
+  public String getPropertyName()
+  {
+    return propertyName;
+  }
+
+  /**
+   * Get the property's new value. May be null if multiple properties changed.
+   *
+   * @return the property's new value
+   */
+  public Object getNewValue()
+  {
+    return newValue;
+  }
+
+  /**
+   * Get the property's old value. May be null if multiple properties changed.
+   *
+   * @return the property's old value
+   */
+  public Object getOldValue()
+  {
+    return oldValue;
+  }
+
+  /**
+   * Set the propagation ID.  This is a way for the event to be passed from
+   * hand to hand and retain a little extra state.  Right now it is unused,
+   * but it should be propagated anyway so that future versions of JavaBeans
+   * can use it, for God knows what.
+   *
+   * @param propagationId the propagation ID
+   * @see #getPropagationId()
+   */
+  public void setPropagationId(Object propagationId)
+  {
+    this.propagationId = propagationId;
+  }
+
+  /**
+   * Get the propagation ID. Right now, it is not used for anything.
+   *
+   * @return the propagation ID
+   * @see #setPropagationId(Object)
+   */
+  public Object getPropagationId()
+  {
+    return propagationId;
+  }
+
+  /**
+   * Utility method to rollback a change.
+   *
+   * @param event the event to rollback
+   * @return a new event with old and new swapped
+   */
+  PropertyChangeEvent rollback()
+  {
+    PropertyChangeEvent result
+      = new PropertyChangeEvent(source, propertyName, newValue, oldValue);
+    result.propagationId = propagationId;
+    return result;
+  }
+} // class PropertyChangeEvent