minor enhancements

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@3344 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/de/anomic/server/serverCodings.java

@@ -67,12 +67,24 @@ public final class serverCodings {
         return s;
     }
     
+    public static String encodeOctal(byte[] in) {
+        if (in == null) return "";
+        StringBuffer result = new StringBuffer(in.length * 8 / 3);
+        for (int i = 0; i < in.length; i++) {
+            if ((0Xff & (int) in[i]) < 8) result.append('0');
+            result.append(Integer.toOctalString(0Xff & (int) in[i]));
+        }
+        return new String(result);
+    }
+    
     public static String encodeHex(byte[] in) {
         if (in == null) return "";
-	String result = "";
+        StringBuffer result = new StringBuffer(in.length * 2);
-	for (int i = 0; i < in.length; i++)
+        for (int i = 0; i < in.length; i++) {
-	    result = result + (((0Xff & (int) in[i]) < 16) ? "0" : "") + Integer.toHexString(0Xff & (int) in[i]);
+            if ((0Xff & (int) in[i]) < 16) result.append('0');
-	return result;
+            result.append(Integer.toHexString(0Xff & (int) in[i]));
+        }
+        return new String(result);
     }
 
     public static byte[] decodeHex(String hex) {
@@ -181,7 +193,7 @@ public final class serverCodings {
     }
 
     public static String map2string(Map m, String separator, boolean braces) {
-        final StringBuffer buf = new StringBuffer(512);
+        final StringBuffer buf = new StringBuffer(20 * m.size());
         if (braces) { buf.append("{"); }
         final Iterator i = m.entrySet().iterator();
         while (i.hasNext()) {
@@ -192,7 +204,7 @@ public final class serverCodings {
         }
         if (buf.length() > 1) { buf.setLength(buf.length() - 1); } // remove last separator
         if (braces) { buf.append("}"); }
-        return buf.toString();
+        return new String(buf);
     }
 
     public static Set string2set(String string, String separator) {
@@ -220,7 +232,7 @@ public final class serverCodings {
             if (hasNext) buf.append(separator);
         }
         if (braces) buf.append("}");
-        return buf.toString();
+        return new String(buf);
     }
     
     public static void main(String[] s) {

source/de/anomic/yacy/yacySeed.java

@@ -312,6 +312,14 @@ public class yacySeed {
         dna.put(yacySeed.URL_IN, Integer.toString(Integer.parseInt(v) + count));
     }
 
+    // 12 * 6 bit = 72 bit = 24 characters octal-hash
+    // octal hashes are used for cache-dumps that are DHT-ready
+    // cause: the natural order of octal hashes are the same as the b64-order of b64Hashes
+    // a hexhash cannot be used in such cases, and b64Hashes are not appropriate for file names
+    public static String b64Hash2octalHash(String b64Hash) {
+        return serverCodings.encodeOctal(kelondroBase64Order.enhancedCoder.decode(b64Hash));
+    }
+
     // 12 * 6 bit = 72 bit = 18 characters hex-hash
     public static String b64Hash2hexHash(String b64Hash) {
         // the hash string represents 12 * 6 bit = 72 bits. This is too much for a long integer.