Make LowerCaseBase16Encoding package protected. (#1427)

Author: Bogdan Drutu

…ce/internal/LowerCaseBase16Encoding.java …ensus/trace/LowerCaseBase16Encoding.javaapi/src/main/java/io/opencensus/trace/internal/LowerCaseBase16Encoding.java renamed to api/src/main/java/io/opencensus/trace/LowerCaseBase16Encoding.java api/src/main/java/io/opencensus/trace/internal/LowerCaseBase16Encoding.java renamed to api/src/main/java/io/opencensus/trace/LowerCaseBase16Encoding.java

@@ -14,15 +14,13 @@
  * limitations under the License.
  */
 
-package io.opencensus.trace.internal;
+package io.opencensus.trace;
 
-import io.opencensus.common.Internal;
 import io.opencensus.internal.Utils;
 import java.util.Arrays;
 
 /** Internal copy of the Guava implementation of the {@code BaseEncoding.base16().lowerCase()}. */
-@Internal
-public final class LowerCaseBase16Encoding {
+final class LowerCaseBase16Encoding {
   private static final String ALPHABET = "0123456789abcdef";
   private static final int ASCII_CHARACTERS = 128;
   private static final char[] ENCODING = buildEncodingArray();
@@ -53,7 +51,7 @@ private static byte[] buildDecodingArray() {
    * @param bytes byte array to be encoded.
    * @return the encoded {@code String}.
    */
-  public static String encodeToString(byte[] bytes) {
+  static String encodeToString(byte[] bytes) {
     StringBuilder stringBuilder = new StringBuilder(bytes.length * 2);
     for (byte byteVal : bytes) {
       int b = byteVal & 0xFF;
@@ -71,7 +69,7 @@ public static String encodeToString(byte[] bytes) {
    * @throws IllegalArgumentException if the input is not a valid encoded string according to this
    *     encoding.
    */
-  public static byte[] decodeToBytes(CharSequence chars) {
+  static byte[] decodeToBytes(CharSequence chars) {
     Utils.checkArgument(chars.length() % 2 == 0, "Invalid input length " + chars.length());
     int bytesWritten = 0;
     byte[] bytes = new byte[chars.length() / 2];

api/src/main/java/io/opencensus/trace/SpanId.java

@@ -17,7 +17,6 @@
 package io.opencensus.trace;
 
 import io.opencensus.internal.Utils;
-import io.opencensus.trace.internal.LowerCaseBase16Encoding;
 import java.util.Arrays;
 import java.util.Random;
 import javax.annotation.Nullable;

api/src/main/java/io/opencensus/trace/TraceId.java

@@ -18,7 +18,6 @@
 
 import io.opencensus.common.Internal;
 import io.opencensus.internal.Utils;
-import io.opencensus.trace.internal.LowerCaseBase16Encoding;
 import java.util.Arrays;
 import java.util.Random;
 import javax.annotation.Nullable;

…nternal/LowerCaseBase16EncodingTest.java …s/trace/LowerCaseBase16EncodingTest.javaapi/src/test/java/io/opencensus/trace/internal/LowerCaseBase16EncodingTest.java renamed to api/src/test/java/io/opencensus/trace/LowerCaseBase16EncodingTest.java api/src/test/java/io/opencensus/trace/internal/LowerCaseBase16EncodingTest.java renamed to api/src/test/java/io/opencensus/trace/LowerCaseBase16EncodingTest.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package io.opencensus.trace.internal;
+package io.opencensus.trace;
 
 import static com.google.common.truth.Truth.assertThat;
 
@@ -25,7 +25,7 @@
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
-/** Unit tests for {@link LowerCaseBase16Encoding}. */
+/** Unit tests for {@link io.opencensus.trace.LowerCaseBase16Encoding}. */
 @RunWith(JUnit4.class)
 public class LowerCaseBase16EncodingTest {
   private static final Charset CHARSET = Charset.forName("UTF-8");