| /* |
| * Copyright (c) 2006, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package com.sun.beans.editors; |
| |
| import java.awt.Component; |
| import java.awt.Graphics; |
| import java.awt.Rectangle; |
| import java.beans.PropertyChangeEvent; |
| import java.beans.PropertyChangeListener; |
| import java.beans.PropertyEditor; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Property editor for java.lang.Enum subclasses. |
| * |
| * @see PropertyEditor |
| * |
| * @since 1.7 |
| * |
| * @author Sergey A. Malenkov |
| */ |
| public final class EnumEditor implements PropertyEditor { |
| private final List<PropertyChangeListener> listeners = new ArrayList<PropertyChangeListener>(); |
| |
| @SuppressWarnings("rawtypes") |
| private final Class<? extends Enum> type; |
| private final String[] tags; |
| |
| private Object value; |
| |
| public EnumEditor(Class<?> type) { |
| Object[] values = type.getEnumConstants(); |
| if ( values == null ) { |
| throw new IllegalArgumentException( "Unsupported " + type ); |
| } |
| this.type = type.asSubclass(java.lang.Enum.class); |
| this.tags = new String[values.length]; |
| for ( int i = 0; i < values.length; i++ ) { |
| this.tags[i] = ( ( Enum )values[i] ).name(); |
| } |
| } |
| |
| public Object getValue() { |
| return this.value; |
| } |
| |
| public void setValue( Object value ) { |
| if ( ( value != null ) && !this.type.isInstance( value ) ) { |
| throw new IllegalArgumentException( "Unsupported value: " + value ); |
| } |
| Object oldValue; |
| PropertyChangeListener[] listeners; |
| synchronized ( this.listeners ) { |
| oldValue = this.value; |
| this.value = value; |
| |
| if ( ( value == null ) ? oldValue == null : value.equals( oldValue ) ) { |
| return; // do not fire event if value is not changed |
| } |
| int size = this.listeners.size(); |
| if ( size == 0 ) { |
| return; // do not fire event if there are no any listener |
| } |
| listeners = this.listeners.toArray( new PropertyChangeListener[size] ); |
| } |
| PropertyChangeEvent event = new PropertyChangeEvent( this, null, oldValue, value ); |
| for ( PropertyChangeListener listener : listeners ) { |
| listener.propertyChange( event ); |
| } |
| } |
| |
| public String getAsText() { |
| return ( this.value != null ) |
| ? ( ( Enum )this.value ).name() |
| : null; |
| } |
| |
| public void setAsText( String text ) { |
| @SuppressWarnings("unchecked") |
| Object tmp = ( text != null ) |
| ? Enum.valueOf( (Class)this.type, text ) |
| : null; |
| setValue(tmp); |
| } |
| |
| public String[] getTags() { |
| return this.tags.clone(); |
| } |
| |
| public String getJavaInitializationString() { |
| String name = getAsText(); |
| return ( name != null ) |
| ? this.type.getName() + '.' + name |
| : "null"; |
| } |
| |
| public boolean isPaintable() { |
| return false; |
| } |
| |
| public void paintValue( Graphics gfx, Rectangle box ) { |
| } |
| |
| public boolean supportsCustomEditor() { |
| return false; |
| } |
| |
| public Component getCustomEditor() { |
| return null; |
| } |
| |
| public void addPropertyChangeListener( PropertyChangeListener listener ) { |
| synchronized ( this.listeners ) { |
| this.listeners.add( listener ); |
| } |
| } |
| |
| public void removePropertyChangeListener( PropertyChangeListener listener ) { |
| synchronized ( this.listeners ) { |
| this.listeners.remove( listener ); |
| } |
| } |
| } |