OAK-11399: Remove usage of Guava io.BaseEncoding

oak-blob-plugins/src/main/java/org/apache/jackrabbit/oak/plugins/blob/datastore/OakFileDataStore.java

@@ -16,7 +16,6 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-
 package org.apache.jackrabbit.oak.plugins.blob.datastore;
 
 import java.io.File;
@@ -25,18 +24,15 @@
 import java.io.InputStream;
 import java.lang.ref.WeakReference;
 import java.nio.charset.StandardCharsets;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.util.AbstractMap;
 import java.util.ArrayList;
+import java.util.Base64;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Set;
 
 import org.apache.jackrabbit.guava.common.base.Strings;
-import org.apache.jackrabbit.guava.common.io.BaseEncoding;
 import org.apache.jackrabbit.guava.common.io.Closeables;
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.IOUtils;
@@ -95,7 +91,7 @@ protected byte[] getOrCreateReferenceKey() throws DataStoreException {
      * Set Base64 encoded signing key
      */
     public void setReferenceKeyEncoded(String encodedKey) {
-        this.referenceKey = BaseEncoding.base64().decode(encodedKey);
+        this.referenceKey = Base64.getDecoder().decode(encodedKey);
     }
 
     /**

oak-blob/src/main/java/org/apache/jackrabbit/oak/spi/blob/AbstractBlobStore.java

@@ -32,6 +32,7 @@
 import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Base64;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
@@ -44,7 +45,7 @@
 import javax.crypto.Mac;
 import javax.crypto.spec.SecretKeySpec;
 
-import org.apache.jackrabbit.guava.common.io.BaseEncoding;
+import org.apache.commons.codec.binary.Base32;
 import org.apache.commons.io.FileUtils;
 import org.apache.jackrabbit.oak.commons.cache.Cache;
 import org.apache.jackrabbit.oak.commons.IOUtils;
@@ -135,6 +136,12 @@ public abstract class AbstractBlobStore implements GarbageCollectableBlobStore,
      */
     private byte[] referenceKey;
 
+    /**
+     * Encode in Base 32, hex encoding, no line breaks, padding with "="
+     */
+    private static final Base32 BASE32ENCODER =
+            new Base32(0, new byte[0], true,  (byte)'=');
+
     private final Logger log = LoggerFactory.getLogger(getClass());
 
     private BlobStatsCollector statsCollector = BlobStatsCollector.NOOP;
@@ -237,7 +244,7 @@ public String getReference(@NotNull String blobId) {
             Mac mac = Mac.getInstance(ALGORITHM);
             mac.init(new SecretKeySpec(getReferenceKey(), ALGORITHM));
             byte[] hash = mac.doFinal(blobId.getBytes("UTF-8"));
-            return blobId + ':' + BaseEncoding.base32Hex().encode(hash);
+            return blobId + ':' + BASE32ENCODER.encodeToString(hash);
         } catch (NoSuchAlgorithmException e) {
             throw new IllegalStateException(e);
         } catch (InvalidKeyException e) {
@@ -307,7 +314,7 @@ public void setReferenceKey(byte[] referenceKey) {
      * @param encodedKey base64 encoded key
      */
     public void setReferenceKeyEncoded(String encodedKey) {
-        setReferenceKey(BaseEncoding.base64().decode(encodedKey));
+        setReferenceKey(Base64.getDecoder().decode(encodedKey));
     }
 
     /**

oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/ReferenceBinaryIT.java

@@ -23,6 +23,7 @@
 
 import java.io.File;
 import java.util.ArrayList;
+import java.util.Base64;
 import java.util.Collection;
 import java.util.List;
 import java.util.Random;
@@ -56,8 +57,6 @@
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 
-import org.apache.jackrabbit.guava.common.io.BaseEncoding;
-
 @RunWith(Parameterized.class)
 public class ReferenceBinaryIT {
 
@@ -179,7 +178,7 @@ private static BlobStore createBlobStore(){
         OakFileDataStore fds = new OakFileDataStore();
         byte[] key = new byte[256];
         new Random().nextBytes(key);
-        fds.setReferenceKeyEncoded(BaseEncoding.base64().encode(key));
+        fds.setReferenceKeyEncoded(Base64.getEncoder().encodeToString(key));
         fds.setMinRecordLength(4092);
         fds.init(file.getAbsolutePath());
         return new DataStoreBlobStore(fds);