*) added method to only get file names in directory listing which match a filter

*) only files which end with .black will be listed as blacklists
*) added a little bit of Javadoc

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@5366 6c8d7289-2bf4-0310-a012-ef5d649a1542

htroot/BlacklistCleaner_p.java

@@ -69,6 +69,8 @@ public class BlacklistCleaner_p {
     private static final int ERR_HOST_WRONG_CHARS = 4;
     private static final int ERR_DOUBLE_OCCURANCE = 5;
     
+    private final static String BLACKLIST_FILENAME_FILTER = "^.*\\.black$";
+    
     public static final Class<?>[] supportedBLEngines = {
         indexDefaultReferenceBlacklist.class
     };
@@ -87,7 +89,7 @@ public class BlacklistCleaner_p {
         
         if (post == null) {
             prop.put("results", "0");
-            putBlacklists(prop, listManager.getDirListing(listManager.listsPath), blacklistToUse);
+            putBlacklists(prop, listManager.getDirListing(listManager.listsPath, BLACKLIST_FILENAME_FILTER), blacklistToUse);
             return prop;
         }
         
@@ -97,7 +99,7 @@ public class BlacklistCleaner_p {
                 prop.put("results", "2");
         }
         
-        putBlacklists(prop, listManager.getDirListing(listManager.listsPath), blacklistToUse);
+        putBlacklists(prop, listManager.getDirListing(listManager.listsPath, BLACKLIST_FILENAME_FILTER), blacklistToUse);
         
         if (blacklistToUse != null) {
             prop.put("results", "1");

htroot/Blacklist_p.java

@@ -54,6 +54,8 @@ public class Blacklist_p {
     private final static String BLACKLIST        = "blackLists_";
     private final static String BLACKLIST_MOVE   = "blackListsMove_";
     private final static String BLACKLIST_SHARED = "BlackLists.Shared";
+    
+    private final static String BLACKLIST_FILENAME_FILTER = "^.*\\.black$";
 
     public static serverObjects respond(final httpRequestHeader header, final serverObjects post, final serverSwitch<?> env) {
         
@@ -66,7 +68,7 @@ public class Blacklist_p {
         final String[] supportedBlacklistTypes = supportedBlacklistTypesStr.split(",");
         
         // loading all blacklist files located in the directory
-        List<String> dirlist = listManager.getDirListing(listManager.listsPath);
+        List<String> dirlist = listManager.getDirListing(listManager.listsPath, BLACKLIST_FILENAME_FILTER);
         
         String blacklistToUse = null;
         final serverObjects prop = new serverObjects();
@@ -148,7 +150,7 @@ public class Blacklist_p {
                     }
                     
                     // reload Blacklists
-                    dirlist = listManager.getDirListing(listManager.listsPath);
+                    dirlist = listManager.getDirListing(listManager.listsPath, BLACKLIST_FILENAME_FILTER);
                 }
                 
             } else if (post.containsKey("deleteList")) {
@@ -176,7 +178,7 @@ public class Blacklist_p {
                 blacklistToUse = null;
                 
                 // reload Blacklists
-                dirlist = listManager.getDirListing(listManager.listsPath);
+                dirlist = listManager.getDirListing(listManager.listsPath, BLACKLIST_FILENAME_FILTER);
 
             } else if (post.containsKey("activateList")) {
 

source/de/anomic/data/listManager.java

@@ -48,6 +48,7 @@ import de.anomic.plasma.plasmaSwitchboard;
 import de.anomic.server.serverCore;
 
 // The Naming of the functions is a bit strange...
+import java.io.FileFilter;
 
 public class listManager {
     public static plasmaSwitchboard switchboard = null;
@@ -220,12 +221,29 @@ public class listManager {
         return new String(temp);
     }
 
-    // get a Directory Listing as a String Array
+    /**
+     * Read content of a directory into a String array of file names.
+     * @param dirname The directory to get the file listing from. If it doesn't exist yet,
+     * it will be created.
+     * @return array of file names
+     */
     public static List<String> getDirListing(final String dirname){
-        final File dir = new File(dirname);
-        return getDirListing(dir);
+        return getDirListing(dirname, null);
     }
     
+    /**
+     * Read content of a directory into a String array of file names.
+     * @param dirname The directory to get the file listing from. If it doesn't exist yet,
+     * it will be created.
+     * @param filter String which contains a regular expression which has to be matched by
+     * file names in order to appear in returned array. All file names will be returned if
+     * filter is null.
+     * @return array of file names
+     */
+    public static List<String> getDirListing(final String dirname, final String filter) {
+        return getDirListing(new File(dirname), filter);
+    }
+
     /**
      * Read content of a directory into a String array of file names.
      * 
@@ -234,16 +252,30 @@ public class listManager {
      * @return array of file names
      */
     public static List<String> getDirListing(final File dir){
+        return getDirListing(dir, null);
+    }
+    
+    /**
+     * Read content of a directory into a String array of file names.
+     * @param dir The directory to get the file listing from. If it doesn't exist yet,
+     * it will be created.
+     * @param filter String which contains a regular expression which has to be matched by
+     * file names in order to appear in returned array. All file names will be returned if
+     * filter is null.
+     * @return array of file names
+     */
+    public static List<String> getDirListing(final File dir, final String filter){
         List<String> ret = new LinkedList<String>();
         File[] fileList;
-
         if (dir != null ) {
             if (!dir.exists()) {
                 dir.mkdir();
             }
             fileList = dir.listFiles();
             for (int i=0; i<= fileList.length-1; i++) {
-                ret.add(fileList[i].getName());
+                if (filter == null || fileList[i].getName().matches(filter)) {
+                    ret.add(fileList[i].getName());
+                }
             }
             return ret;
         }