From: amwaterhouse <Andrew Waterhouse>
Date: Fri, 18 Mar 2005 16:08:11 +0000 (+0000)
Subject: new class
X-Git-Tag: Release_2_0~568
X-Git-Url: http://source.jalview.org/gitweb/?a=commitdiff_plain;h=e67588afd890cb74a529a4f69c076456725fead7;p=jalview.git

new class
---

diff --git a/src/jalview/io/JalviewFileFilter.java b/src/jalview/io/JalviewFileFilter.java
new file mode 100755
index 0000000..85ac084
--- /dev/null
+++ b/src/jalview/io/JalviewFileFilter.java
@@ -0,0 +1,118 @@
+package jalview.io;
+
+import javax.swing.filechooser.*;
+import java.io.File;
+import java.util.*;
+
+public class JalviewFileFilter extends FileFilter
+{
+      private static String TYPE_UNKNOWN = "Type Unknown";
+      private static String HIDDEN_FILE = "Hidden File";
+      public static Hashtable suffixHash = new Hashtable();
+
+      private Hashtable filters = null;
+      private String description = "no description";
+      private String fullDescription = "full description";
+      private boolean useExtensionsInDescription = true;
+
+      public JalviewFileFilter() {
+          this.filters = new Hashtable();
+      }
+
+      public JalviewFileFilter(String extension) {
+          this(extension,null);
+      }
+
+      public JalviewFileFilter(String extension, String description) {
+          this();
+          if(extension!=null) addExtension(extension);
+           if(description!=null) setDescription(description);
+      }
+
+      public JalviewFileFilter(String[] filts) {
+          this(filts, null);
+      }
+
+      public JalviewFileFilter(String[] filts, String description) {
+          this();
+          for (int i = 0; i < filts.length; i++) {
+              // add filters one by one
+              addExtension(filts[i]);
+          }
+           if(description!=null) setDescription(description);
+      }
+
+      // takes account of the fact that database is a directory
+      public boolean accept(File f) {
+          if(f != null) {
+              String extension = getExtension(f);
+              if(f.isDirectory()) {
+                 if(extension == null || extension.equals("")) {
+                    return true;
+                 } else {
+                    if(filters.get(getExtension(f)) != null) {
+                       return true;
+                    }
+                 }
+              }
+              if(extension != null && filters.get(getExtension(f)) != null) {
+                  return true;
+              }
+          }
+          return false;
+      }
+
+       public String getExtension(File f) {
+          if(f != null) {
+              String filename = f.getName();
+              int i = filename.lastIndexOf('.');
+              if(i>0 && i<filename.length()-1) {
+                  return filename.substring(i+1).toLowerCase();
+              };
+          }
+          return "";
+      }
+
+      public void addExtension(String extension) {
+          if(filters == null) {
+              filters = new Hashtable(5);
+          }
+          filters.put(extension.toLowerCase(), this);
+          fullDescription = null;
+      }
+
+
+      public String getDescription() {
+          if(fullDescription == null) {
+              if(description == null || isExtensionListInDescription()) {
+                   fullDescription = description==null ? "(" : description + " (";
+                  // build the description from the extension list
+                  Enumeration extensions = filters.keys();
+                  if(extensions != null) {
+                      fullDescription += "." + (String) extensions.nextElement();
+                      while (extensions.hasMoreElements()) {
+                          fullDescription += ", " + (String) extensions.nextElement();
+                      }
+                  }
+                  fullDescription += ")";
+              } else {
+                  fullDescription = description;
+              }
+          }
+          return fullDescription;
+      }
+
+      public void setDescription(String description) {
+          this.description = description;
+          fullDescription = null;
+      }
+
+      public void setExtensionListInDescription(boolean b) {
+          useExtensionsInDescription = b;
+          fullDescription = null;
+      }
+
+      public boolean isExtensionListInDescription() {
+          return useExtensionsInDescription;
+      }
+  }