2 * Jalview - A Sequence Alignment Editor and Viewer
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3 * Copyright (C) 2006 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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24 import javax.swing.filechooser.FileFilter;
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26 public class JalviewFileFilter
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29 public static Hashtable suffixHash = new Hashtable();
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30 private Hashtable filters = null;
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31 private String description = "no description";
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32 private String fullDescription = "full description";
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33 private boolean useExtensionsInDescription = true;
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35 public JalviewFileFilter(String extension, String description)
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37 StringTokenizer st = new StringTokenizer(extension, ",");
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39 while (st.hasMoreElements())
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41 addExtension(st.nextToken().trim());
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44 setDescription(description);
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47 public JalviewFileFilter(String[] filts)
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52 public JalviewFileFilter(String[] filts, String description)
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54 for (int i = 0; i < filts.length; i++)
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56 // add filters one by one
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57 addExtension(filts[i]);
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60 if (description != null)
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62 setDescription(description);
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66 public String getAcceptableExtension()
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68 return filters.keys().nextElement().toString();
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71 // takes account of the fact that database is a directory
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72 public boolean accept(File f)
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76 String extension = getExtension(f);
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78 if (f.isDirectory())
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83 if ( (extension != null) && (filters.get(getExtension(f)) != null))
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92 public String getExtension(File f)
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96 String filename = f.getName();
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97 int i = filename.lastIndexOf('.');
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99 if ( (i > 0) && (i < (filename.length() - 1)))
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101 return filename.substring(i + 1).toLowerCase();
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110 public void addExtension(String extension)
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112 if (filters == null)
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114 filters = new Hashtable(5);
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117 filters.put(extension.toLowerCase(), this);
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118 fullDescription = null;
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121 public String getDescription()
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123 if (fullDescription == null)
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125 if ( (description == null) || isExtensionListInDescription())
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127 fullDescription = (description == null) ? "(" : (description +
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130 // build the description from the extension list
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131 Enumeration extensions = filters.keys();
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133 if (extensions != null)
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135 fullDescription += ("." +
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136 (String) extensions.nextElement());
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138 while (extensions.hasMoreElements())
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140 fullDescription += (", " +
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141 (String) extensions.nextElement());
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145 fullDescription += ")";
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149 fullDescription = description;
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153 return fullDescription;
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156 public void setDescription(String description)
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158 this.description = description;
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159 fullDescription = null;
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162 public void setExtensionListInDescription(boolean b)
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164 useExtensionsInDescription = b;
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165 fullDescription = null;
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168 public boolean isExtensionListInDescription()
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170 return useExtensionsInDescription;
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