2 * Jalview - A Sequence Alignment Editor and Viewer
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3 * Copyright (C) 2005 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
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5 * This program is free software; you can redistribute it and/or
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6 * modify it under the terms of the GNU General Public License
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7 * as published by the Free Software Foundation; either version 2
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8 * of the License, or (at your option) any later version.
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program; if not, write to the Free Software
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17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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22 import javax.swing.filechooser.*;
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23 import java.io.File;
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26 public class JalviewFileFilter extends FileFilter
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28 private static String TYPE_UNKNOWN = "Type Unknown";
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29 private static String HIDDEN_FILE = "Hidden File";
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30 public static Hashtable suffixHash = new Hashtable();
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32 private Hashtable filters = null;
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33 private String description = "no description";
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34 private String fullDescription = "full description";
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35 private boolean useExtensionsInDescription = true;
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38 public JalviewFileFilter(String extension, String description) {
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40 StringTokenizer st = new StringTokenizer(extension, ",");
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41 while(st.hasMoreElements())
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43 addExtension(st.nextToken().trim());
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45 setDescription(description);
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48 public JalviewFileFilter(String[] filts) {
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52 public String getAcceptableExtension()
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54 return filters.keys().nextElement().toString();
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57 public JalviewFileFilter(String[] filts, String description) {
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58 for (int i = 0; i < filts.length; i++) {
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59 // add filters one by one
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60 addExtension(filts[i]);
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62 if(description!=null) setDescription(description);
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65 // takes account of the fact that database is a directory
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66 public boolean accept(File f) {
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68 String extension = getExtension(f);
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69 if(f.isDirectory()) {
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70 if(extension == null || extension.equals("")) {
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73 if(filters.get(getExtension(f)) != null) {
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78 if(extension != null && filters.get(getExtension(f)) != null) {
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85 public String getExtension(File f) {
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87 String filename = f.getName();
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88 int i = filename.lastIndexOf('.');
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89 if(i>0 && i<filename.length()-1) {
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90 return filename.substring(i+1).toLowerCase();
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96 public void addExtension(String extension) {
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97 if(filters == null) {
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98 filters = new Hashtable(5);
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100 filters.put(extension.toLowerCase(), this);
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101 fullDescription = null;
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105 public String getDescription() {
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106 if(fullDescription == null) {
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107 if(description == null || isExtensionListInDescription()) {
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108 fullDescription = description==null ? "(" : description + " (";
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109 // build the description from the extension list
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110 Enumeration extensions = filters.keys();
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111 if(extensions != null) {
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112 fullDescription += "." + (String) extensions.nextElement();
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113 while (extensions.hasMoreElements()) {
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114 fullDescription += ", " + (String) extensions.nextElement();
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117 fullDescription += ")";
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119 fullDescription = description;
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122 return fullDescription;
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125 public void setDescription(String description) {
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126 this.description = description;
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127 fullDescription = null;
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130 public void setExtensionListInDescription(boolean b) {
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131 useExtensionsInDescription = b;
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132 fullDescription = null;
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135 public boolean isExtensionListInDescription() {
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136 return useExtensionsInDescription;
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