protected static Map unmarshallDescription()

in DynamoDbEncryption/runtimes/java/src/main/sdkv1/com/amazonaws/services/dynamodbv2/datamodeling/encryption/DynamoDBEncryptor.java [695:738]

42 lines of code
7 McCabe index (conditional complexity)


  protected static Map<String, String> unmarshallDescription(
    AttributeValue attributeValue
  ) {
    attributeValue.getB().mark();
    try (
      DataInputStream in = new DataInputStream(
        new ByteBufferInputStream(attributeValue.getB())
      )
    ) {
      Map<String, String> result = new HashMap<String, String>();
      int version = in.readInt();
      if (version != CURRENT_VERSION) {
        throw new IllegalArgumentException("Unsupported description version");
      }

      String key, value;
      int keyLength, valueLength;
      try {
        while (in.available() > 0) {
          keyLength = in.readInt();
          byte[] bytes = new byte[keyLength];
          if (in.read(bytes) != keyLength) {
            throw new IllegalArgumentException("Malformed description");
          }
          key = new String(bytes, UTF8);
          valueLength = in.readInt();
          bytes = new byte[valueLength];
          if (in.read(bytes) != valueLength) {
            throw new IllegalArgumentException("Malformed description");
          }
          value = new String(bytes, UTF8);
          result.put(key, value);
        }
      } catch (EOFException eof) {
        throw new IllegalArgumentException("Malformed description", eof);
      }
      return result;
    } catch (IOException ex) {
      // Due to the objects in use, an IOException is not possible.
      throw new RuntimeException("Unexpected exception", ex);
    } finally {
      attributeValue.getB().reset();
    }
  }