1 // ******************************************************************************
2 //
3 // Title: Force Field X.
4 // Description: Force Field X - Software for Molecular Biophysics.
5 // Copyright: Copyright (c) Michael J. Schnieders 2001-2024.
6 //
7 // This file is part of Force Field X.
8 //
9 // Force Field X is free software; you can redistribute it and/or modify it
10 // under the terms of the GNU General Public License version 3 as published by
11 // the Free Software Foundation.
12 //
13 // Force Field X is distributed in the hope that it will be useful, but WITHOUT
14 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15 // FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
16 // details.
17 //
18 // You should have received a copy of the GNU General Public License along with
19 // Force Field X; if not, write to the Free Software Foundation, Inc., 59 Temple
20 // Place, Suite 330, Boston, MA 02111-1307 USA
21 //
22 // Linking this library statically or dynamically with other modules is making a
23 // combined work based on this library. Thus, the terms and conditions of the
24 // GNU General Public License cover the whole combination.
25 //
26 // As a special exception, the copyright holders of this library give you
27 // permission to link this library with independent modules to produce an
28 // executable, regardless of the license terms of these independent modules, and
29 // to copy and distribute the resulting executable under terms of your choice,
30 // provided that you also meet, for each linked independent module, the terms
31 // and conditions of the license of that module. An independent module is a
32 // module which is not derived from or based on this library. If you modify this
33 // library, you may extend this exception to your version of the library, but
34 // you are not obligated to do so. If you do not wish to do so, delete this
35 // exception statement from your version.
36 //
37 // ******************************************************************************
38 package ffx.xray.parsers;
39
40 import java.io.DataInputStream;
41 import java.io.File;
42 import java.io.FileInputStream;
43 import javax.swing.filechooser.FileFilter;
44
45 /**
46 * The MTZFileFilter class is used to choose CCP4 MTZ files
47 *
48 * @author Michael J. Schnieders
49 * @since 1.0
50 */
51 public final class MTZFileFilter extends FileFilter {
52
53 /** Default Constructor. */
54 public MTZFileFilter() {}
55
56 /**
57 * {@inheritDoc}
58 *
59 * <p>This method determines whether or not the file parameter is an *.mtz file or not, returning
60 * true if it is (true is also returned for any directory)
61 */
62 @Override
63 public boolean accept(File file) {
64 if (file.isDirectory()) {
65 return true;
66 }
67 String fileName = file.getName().toLowerCase();
68 return fileName.endsWith(".mtz");
69 }
70
71 /**
72 * acceptDeep
73 *
74 * @param file a {@link java.io.File} object.
75 * @return a boolean.
76 */
77 public boolean acceptDeep(File file) {
78 try {
79 if (file == null || file.isDirectory() || !file.canRead()) {
80 return false;
81 }
82 FileInputStream fileInputStream = new FileInputStream(file);
83 DataInputStream dataInputStream = new DataInputStream(fileInputStream);
84
85 byte[] bytes = new byte[80];
86 int offset = 0;
87
88 // Is this an MTZ file?
89 dataInputStream.read(bytes, offset, 4);
90 String mtzstr = new String(bytes);
91 return mtzstr.trim().equals("MTZ");
92 } catch (Exception e) {
93 return true;
94 }
95 }
96
97 /**
98 * {@inheritDoc}
99 *
100 * <p>Provides a description of this FileFilter.
101 */
102 @Override
103 public String getDescription() {
104 return "CCP4 MTZ Reflection Files: *.mtz";
105 }
106 }