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BobHansonBobHanson
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roughing in of JDesktopPane, JInternalFrame, DesktopManager
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‎sources/net.sf.j2s.java.core/src/java/beans/VetoableChangeListener.java‎

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/*
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* Copyright (c) 1996, 1997, 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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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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package java.beans;
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import java.util.EventListener;
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/**
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* A VetoableChange event gets fired whenever a bean changes a "constrained"
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* property. You can register a VetoableChangeListener with a source bean
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* so as to be notified of any constrained property updates.
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*/
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public interface VetoableChangeListener extends EventListener {
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/**
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* This method gets called when a constrained property is changed.
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*
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* @param evt a <code>PropertyChangeEvent</code> object describing the
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* event source and the property that has changed.
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* @exception PropertyVetoException if the recipient wishes the property
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* change to be rolled back.
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*/
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void vetoableChange(PropertyChangeEvent evt)
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throws PropertyVetoException;
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}

‎sources/net.sf.j2s.java.core/src/java/beans/VetoableChangeListenerProxy.java‎

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/*
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* Copyright (c) 2000, 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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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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package java.beans;
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import java.util.EventListenerProxy;
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/**
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* A class which extends the <code>EventListenerProxy</code> specifically
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* for associating a <code>VetoableChangeListener</code> with a "constrained"
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* property. Instances of this class can be added as a
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* <code>VetoableChangeListener</code> to a bean which supports firing
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* VetoableChange events.
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* <p>
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* If the object has a <code>getVetoableChangeListeners()</code>
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* method then the array returned could be a mixture of
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* <code>VetoableChangeListener</code> and
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* <code>VetoableChangeListenerProxy</code> objects.
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* <p>
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* @see java.util.EventListenerProxy
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* @see VetoableChangeListener
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* @see VetoableChangeSupport#getVetoableChangeListeners
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* @since 1.4
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*/
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public class VetoableChangeListenerProxy extends EventListenerProxy
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implements VetoableChangeListener {
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private String propertyName;
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/**
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* @param propertyName The name of the property to listen on.
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* @param listener The listener object
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*/
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public VetoableChangeListenerProxy(String propertyName,
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VetoableChangeListener listener) {
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super(listener);
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this.propertyName = propertyName;
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}
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/**
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* Forwards the property change event to the listener delegate.
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*
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* @param evt the property change event
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*
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* @exception PropertyVetoException if the recipient wishes the property
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* change to be rolled back.
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*/
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public void vetoableChange(PropertyChangeEvent evt) throws
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PropertyVetoException{
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((VetoableChangeListener)getListener()).vetoableChange(evt);
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}
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/**
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* Returns the name of the named property associated with the
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* listener.
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*/
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public String getPropertyName() {
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return propertyName;
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}
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}

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