remove unnecessary method

pdb-api/src/main/java/org/lucares/pdb/api/StringCompressor.java

@@ -44,7 +44,7 @@ public class StringCompressor {
 
     public int putString(final String value, final Function<String, String> postProcess) {
         final String processedValue = postProcess.apply(value);
-        return usip.computeIfAbsentWithPostprocess(processedValue, postProcess);
+        return usip.computeIfAbsent(processedValue);
     }
 
     public String get(final int integer) {

pdb-api/src/main/java/org/lucares/pdb/api/UniqueStringIntegerPairs.java

@@ -205,6 +205,17 @@ public class UniqueStringIntegerPairs {
         return stringToInt.get(string);
     }
 
+    public Integer computeIfAbsent(final String string) {
+        if (!stringToInt.containsKey(string)) {
+            synchronized (stringToInt) {
+                final Integer integer = intToString.size();
+                putStringAndInteger(string, integer);
+            }
+        }
+
+        return stringToInt.get(string);
+    }
+
     public Integer computeIfAbsent(final byte[] bytes, final int start, final int endExclusive,
             final Function<String, String> postProcess) {
 
@@ -212,34 +223,9 @@ public class UniqueStringIntegerPairs {
         Integer result = bytesToInt.get(byteArray);
         if (result == null) {
             final String string = new String(bytes, start, endExclusive - start, StandardCharsets.UTF_8);
-            result = computeIfAbsentWithPostprocess(string, postProcess);
+            final String postProcessed = postProcess.apply(string);
+            result = computeIfAbsent(postProcessed);
         }
         return result;
     }
-
-    public Integer computeIfAbsentWithPostprocess(final String string, final Function<String, String> postProcess) {
-
-        final ByteArray byteArray = new ByteArray(string);
-        Integer result = bytesToInt.get(byteArray);
-        if (result == null) {
-            synchronized (stringToInt) {
-                if (!bytesToInt.containsKey(byteArray)) {
-                    final String normalizedString = postProcess.apply(string);
-                    result = get(normalizedString);
-                    if (result != null) {
-                        return result;
-                    }
-
-                    final Integer integer = intToString.size();
-                    putStringAndInteger(normalizedString, integer); // adds the normalized String to stringToInt and
-                                                                    // bytesToInt
-                    bytesToInt.put(byteArray, integer); // also add the original String to bytesToInt, because it is
-                                                        // used as cache
-                }
-                result = bytesToInt.get(byteArray);
-            }
-        }
-
-        return result;
-    }
 }