1 /*
   2  * Copyright (c) 2016, 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24  /*
  25   * @test
  26   * @bug     6294607
  27   * @summary Test verifies whether getCompressionTypes() returns only one
  28   *          compression type(LZW) for GIF and not more than that.
  29   * @run     main GIFCompressionTypesTest
  30   */
  31 
  32 import java.util.Iterator;
  33 import javax.imageio.ImageIO;
  34 import javax.imageio.ImageWriteParam;
  35 import javax.imageio.ImageWriter;
  36 
  37 public class GIFCompressionTypesTest {
  38 
  39     static ImageWriter writer = null;
  40 
  41     public static void main(String args[]) {
  42         Iterator it = ImageIO.getImageWritersByFormatName("gif");
  43         while (it.hasNext()) {
  44             writer = (ImageWriter) it.next();
  45             break;
  46         }
  47         ImageWriteParam param = writer.getDefaultWriteParam();
  48 
  49         param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
  50         String compTypes[] = param.getCompressionTypes();
  51         // In GIF we support only one compression type : LZW
  52         if (compTypes.length != 1) {
  53             throw new RuntimeException("We support only one compression"
  54                     + " type in GIF : LZW");
  55         }
  56     }
  57 }
  58