Parse encoded cbor data item

src/main/java/com/authlete/cbor/CBORByteArray.java

@@ -18,6 +18,7 @@
 
 import java.io.IOException;
 import java.io.OutputStream;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
@@ -313,6 +314,24 @@ private List<? extends CBORItem> prepareDecodedContent()
         }
     }
 
+    @Override
+    protected Object parse(Number tagNumber) {
+        if (!isEncodedCborDataItem(tagNumber)) {
+            return getValue();
+        }
+        List<? extends CBORItem> items = prepareDecodedContent();
+        if (items != null) {
+            if (items.size() > 1) {
+            List<Object> list = new ArrayList<>();
+            items.stream().map(CBORItem::parse).forEachOrdered(list::add);
+            return list;
+            } else {
+               return items.get(0).parse();
+            }
+        } else {
+            return getValue();
+        }
+    }
 
     private String prettifyString(String comment)
     {

src/main/java/com/authlete/cbor/CBORItem.java

@@ -79,6 +79,22 @@ public void setComment(String comment)
      */
     public abstract Object parse();
 
+    /**
+     * Convert this {@link CBORItem} instance into an instance of a common Java class. The default
+     * implementation of this method calls the {@code parse()} method.
+     *
+     * @param tagNumber
+     *         The tag number of the tag wrapping this CBOR item. If this CBOR
+     *         item is not wrapped, {@code null} is passed.
+     *
+     * @return
+     *         An instance of a common Java class that represents this CBOR data item.
+     */
+    protected Object parse(Number tagNumber)
+    {
+        return parse();
+    }
+
 
     /**
      * Write the CBOR representation of this instance into the output stream.

src/main/java/com/authlete/cbor/CBORTaggedItem.java

@@ -132,6 +132,6 @@ public void encode(OutputStream outputStream) throws IOException
     @Override
     public Object parse()
     {
-        return tagContent.parse();
+        return tagContent.parse(tagNumber);
     }
 }

src/test/java/com/authlete/cbor/CBORParsingTest.java

@@ -196,6 +196,31 @@ public void test_byte_array() throws IOException
         assertArrayEquals(expected, (byte[])object);
     }
 
+    @Test
+    public void test_byte_array_cbor() throws IOException
+    {
+        // === byte[] ===
+        //
+        // CBOR data item representing tagged CBOR data
+        // encoded d818456449455446.
+        //
+        //   major = 24  ; byte string
+        //
+        byte[] input = {
+                (byte)0xd8, (byte)0x18, (byte)0x45, (byte)0x64,
+                (byte)0x49, (byte)0x45, (byte)0x54, (byte)0x46
+        };
+
+        // Expected result.
+        String expected ="IETF";
+
+        // Parse the CBOR data item.
+        Object object = new CBORParser(input).next();
+
+        // The object should be a String instance.
+        assertSame(String.class, object.getClass());
+        assertEquals(expected, (String)object);
+    }
 
     @Test
     public void test_string() throws IOException