1 /*
   2  * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.awt.desktop;
  27 
  28 import java.awt.Desktop;
  29 import java.awt.GraphicsEnvironment;
  30 import java.awt.HeadlessException;
  31 import java.io.File;
  32 import java.util.ArrayList;
  33 import java.util.List;
  34 
  35 /**
  36  * Auxiliary event containing a list of files.
  37  *
  38  * @since 9
  39  */
  40 public class FilesEvent extends AppEvent {
  41 
  42     /**
  43      * Use serialVersionUID from JDK 9 for interoperability.
  44      */
  45     private static final long serialVersionUID = 5271763715462312871L;
  46 
  47     /**
  48      * The list of files.
  49      */
  50     final List<File> files;
  51 
  52     /**
  53      * Constructs a {@code FilesEvent}.
  54      *
  55      * @param  files the list of files
  56      * @throws HeadlessException if {@link GraphicsEnvironment#isHeadless()}
  57      *         returns {@code true}
  58      * @throws UnsupportedOperationException if Desktop API is not supported on
  59      *         the current platform
  60      * @see Desktop#isDesktopSupported()
  61      * @see java.awt.GraphicsEnvironment#isHeadless
  62      */
  63     FilesEvent(final List<File> files) {
  64         this.files = files;
  65     }
  66 
  67     /**
  68      * Gets the list of files.
  69      *
  70      * @return the list of files
  71      */
  72     public List<File> getFiles() {
  73         return files == null
  74                 ? null
  75                 : new ArrayList<>(files);
  76     }
  77 }