Fix java visibility for API

Author: patrickfav

src/main/java/at/favre/lib/bytes/AbstractBytes.java

@@ -24,7 +24,7 @@
 /**
  * Base interface for bytes
  */
-public interface AbstractBytes {
+interface AbstractBytes {
 
     /**
      * Checks if instance is mutable

src/main/java/at/favre/lib/bytes/BytesTransformer.java

@@ -53,7 +53,7 @@ public interface BytesTransformer {
      */
     final class BitWiseOperatorTransformer implements BytesTransformer {
 
-        enum Mode {
+        public enum Mode {
             AND, OR, XOR
         }
 
@@ -128,7 +128,7 @@ public boolean supportInPlaceTransformation() {
      * @see <a href="https://en.wikipedia.org/wiki/Bitwise_operation#Bit_shifts">Bit shifts</a>
      */
     final class ShiftTransformer implements BytesTransformer {
-        enum Type {
+        public enum Type {
             LEFT_SHIFT, RIGHT_SHIFT
         }
 

src/main/java/at/favre/lib/bytes/BytesTransformers.java

@@ -112,7 +112,7 @@ public static BytesTransformer decompressGzip() {
     /**
      * Shuffles the internal byte array
      */
-    final static class ShuffleTransformer implements BytesTransformer {
+    public final static class ShuffleTransformer implements BytesTransformer {
         private final Random random;
 
         ShuffleTransformer(Random random) {
@@ -136,7 +136,7 @@ public boolean supportInPlaceTransformation() {
     /**
      * Sorts the internal byte array with given {@link java.util.Comparator}
      */
-    final static class SortTransformer implements BytesTransformer {
+    public final static class SortTransformer implements BytesTransformer {
         private final Comparator<Byte> comparator;
 
         SortTransformer() {
@@ -170,8 +170,8 @@ public boolean supportInPlaceTransformation() {
     /**
      * Adds or converts to arbitrary checksum
      */
-    final static class ChecksumTransformer implements BytesTransformer {
-        enum Mode {
+    public final static class ChecksumTransformer implements BytesTransformer {
+        public enum Mode {
             /**
              * Appends checksum to given byte array
              */
@@ -217,7 +217,7 @@ public boolean supportInPlaceTransformation() {
     /**
      * Byte compression with gzip
      */
-    final static class GzipCompressor implements BytesTransformer {
+    public final static class GzipCompressor implements BytesTransformer {
         private final boolean compress;
 
         GzipCompressor(boolean compress) {

src/test/java/at/favre/lib/bytes/otherPackage/BytesTransformTest.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2017 Patrick Favre-Bulle
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package at.favre.lib.bytes.otherPackage;
+
+import at.favre.lib.bytes.BytesTransformers;
+import org.junit.Test;
+
+import java.util.zip.CRC32;
+
+import static at.favre.lib.bytes.BytesTransformers.ChecksumTransformer;
+import static org.junit.Assert.assertFalse;
+
+public class BytesTransformTest {
+    @Test
+    public void testApiVisible() throws Exception {
+        assertFalse(BytesTransformers.checksum(new CRC32(), ChecksumTransformer.Mode.TRANSFORM, 4).supportInPlaceTransformation());
+    }
+}