protected AttributeValueType getAttributeValueType(AttributeValue value) {
   if (value != null) {
     if (value.getN() != null) {
       return AttributeValueType.N;
     } else if (value.getS() != null) {
       return AttributeValueType.S;
     } else if (value.getNS() != null) {
       return AttributeValueType.NS;
     } else if (value.getSS() != null) {
       return AttributeValueType.SS;
     }
   }
   return AttributeValueType.UNKNOWN;
 }
  private void run() throws IOException {
    InputStream resourceAsStream = getClass().getResourceAsStream("/AwsCredentials.properties");
    assert resourceAsStream != null;

    AWSCredentials credentials = new PropertiesCredentials(resourceAsStream);
    AmazonDynamoDBClient amazonDynamoDBClient = new AmazonDynamoDBClient(credentials);
    amazonDynamoDBClient.setEndpoint("https://dynamodb.us-west-1.amazonaws.com");

    String tableName = "wellsfargo-checking-01";
    //        String tableName = "table3";

    //        describeTable(amazonDynamoDBClient, tableName);

    List<String> strings = FileUtils.readLines(new File("data/subset.txt"));
    int i = 0;
    for (String record : strings) {
      //	1	1/2/00	Opening Balance	-	3504.65	X	-	[WF Checking]
      String[] ledgerEntry = record.split("\\t");
      Map<String, AttributeValue> item = new HashMap<String, AttributeValue>();
      AttributeValue txidAttribute = new AttributeValue();
      txidAttribute.setN(ledgerEntry[0]);

      item.put("txid", txidAttribute);
      item.put("date", new AttributeValue(ledgerEntry[1]));
      item.put("payee", new AttributeValue(ledgerEntry[2]));
      item.put("memo", new AttributeValue(ledgerEntry[3]));
      item.put("amount", new AttributeValue(ledgerEntry[4]));
      item.put("cleared", new AttributeValue(ledgerEntry[5]));
      item.put("checknumber", new AttributeValue(ledgerEntry[6]));
      item.put("category", new AttributeValue(ledgerEntry[7]));

      PutItemRequest putItemRequest = new PutItemRequest(tableName, item);
      PutItemResult putItemResult = amazonDynamoDBClient.putItem(putItemRequest);
      if (++i % 10 == 0) {
        System.out.println("putItemResult: " + putItemResult);
      }
    }
  }
  public Request<BatchGetItemRequest> marshall(BatchGetItemRequest batchGetItemRequest) {
    if (batchGetItemRequest == null) {
      throw new AmazonClientException("Invalid argument passed to marshall(...)");
    }

    Request<BatchGetItemRequest> request =
        new DefaultRequest<BatchGetItemRequest>(batchGetItemRequest, "AmazonDynamoDB");
    String target = "DynamoDB_20111205.BatchGetItem";
    request.addHeader("X-Amz-Target", target);
    request.addHeader("Content-Type", "application/x-amz-json-1.0");

    request.setHttpMethod(HttpMethodName.POST);

    String uriResourcePath = "";

    uriResourcePath = uriResourcePath.replaceAll("//", "/");

    if (uriResourcePath.contains("?")) {
      String queryString = uriResourcePath.substring(uriResourcePath.indexOf("?") + 1);
      uriResourcePath = uriResourcePath.substring(0, uriResourcePath.indexOf("?"));

      for (String s : queryString.split("[;&]")) {
        String[] nameValuePair = s.split("=");
        if (nameValuePair.length == 2) {
          request.addParameter(nameValuePair[0], nameValuePair[1]);
        } else {
          request.addParameter(s, null);
        }
      }
    }

    request.setResourcePath(uriResourcePath);

    try {
      StringWriter stringWriter = new StringWriter();
      JSONWriter jsonWriter = new JSONWriter(stringWriter);

      jsonWriter.object();

      if (batchGetItemRequest.getRequestItems() != null) {
        jsonWriter.key("RequestItems");
        jsonWriter.object();
        for (Map.Entry<String, KeysAndAttributes> requestItemsListValue :
            batchGetItemRequest.getRequestItems().entrySet()) {
          if (requestItemsListValue.getValue() != null) {
            jsonWriter.key(requestItemsListValue.getKey());

            jsonWriter.object();

            java.util.List<Key> keysList = requestItemsListValue.getValue().getKeys();
            if (keysList != null && keysList.size() > 0) {

              jsonWriter.key("Keys");
              jsonWriter.array();

              for (Key keysListValue : keysList) {
                if (keysListValue != null) {
                  jsonWriter.object();
                  AttributeValue hashKeyElement = keysListValue.getHashKeyElement();
                  if (hashKeyElement != null) {

                    jsonWriter.key("HashKeyElement");
                    jsonWriter.object();

                    if (hashKeyElement.getS() != null) {
                      jsonWriter.key("S").value(hashKeyElement.getS());
                    }
                    if (hashKeyElement.getN() != null) {
                      jsonWriter.key("N").value(hashKeyElement.getN());
                    }
                    if (hashKeyElement.getB() != null) {
                      jsonWriter.key("B").value(hashKeyElement.getB());
                    }

                    java.util.List<String> sSList = hashKeyElement.getSS();
                    if (sSList != null && sSList.size() > 0) {

                      jsonWriter.key("SS");
                      jsonWriter.array();

                      for (String sSListValue : sSList) {
                        if (sSListValue != null) {
                          jsonWriter.value(sSListValue);
                        }
                      }
                      jsonWriter.endArray();
                    }

                    java.util.List<String> nSList = hashKeyElement.getNS();
                    if (nSList != null && nSList.size() > 0) {

                      jsonWriter.key("NS");
                      jsonWriter.array();

                      for (String nSListValue : nSList) {
                        if (nSListValue != null) {
                          jsonWriter.value(nSListValue);
                        }
                      }
                      jsonWriter.endArray();
                    }

                    java.util.List<java.nio.ByteBuffer> bSList = hashKeyElement.getBS();
                    if (bSList != null && bSList.size() > 0) {

                      jsonWriter.key("BS");
                      jsonWriter.array();

                      for (java.nio.ByteBuffer bSListValue : bSList) {
                        if (bSListValue != null) {
                          jsonWriter.value(bSListValue);
                        }
                      }
                      jsonWriter.endArray();
                    }
                    jsonWriter.endObject();
                  }
                  AttributeValue rangeKeyElement = keysListValue.getRangeKeyElement();
                  if (rangeKeyElement != null) {

                    jsonWriter.key("RangeKeyElement");
                    jsonWriter.object();

                    if (rangeKeyElement.getS() != null) {
                      jsonWriter.key("S").value(rangeKeyElement.getS());
                    }
                    if (rangeKeyElement.getN() != null) {
                      jsonWriter.key("N").value(rangeKeyElement.getN());
                    }
                    if (rangeKeyElement.getB() != null) {
                      jsonWriter.key("B").value(rangeKeyElement.getB());
                    }

                    java.util.List<String> sSList = rangeKeyElement.getSS();
                    if (sSList != null && sSList.size() > 0) {

                      jsonWriter.key("SS");
                      jsonWriter.array();

                      for (String sSListValue : sSList) {
                        if (sSListValue != null) {
                          jsonWriter.value(sSListValue);
                        }
                      }
                      jsonWriter.endArray();
                    }

                    java.util.List<String> nSList = rangeKeyElement.getNS();
                    if (nSList != null && nSList.size() > 0) {

                      jsonWriter.key("NS");
                      jsonWriter.array();

                      for (String nSListValue : nSList) {
                        if (nSListValue != null) {
                          jsonWriter.value(nSListValue);
                        }
                      }
                      jsonWriter.endArray();
                    }

                    java.util.List<java.nio.ByteBuffer> bSList = rangeKeyElement.getBS();
                    if (bSList != null && bSList.size() > 0) {

                      jsonWriter.key("BS");
                      jsonWriter.array();

                      for (java.nio.ByteBuffer bSListValue : bSList) {
                        if (bSListValue != null) {
                          jsonWriter.value(bSListValue);
                        }
                      }
                      jsonWriter.endArray();
                    }
                    jsonWriter.endObject();
                  }
                  jsonWriter.endObject();
                }
              }
              jsonWriter.endArray();
            }

            java.util.List<String> attributesToGetList =
                requestItemsListValue.getValue().getAttributesToGet();
            if (attributesToGetList != null && attributesToGetList.size() > 0) {

              jsonWriter.key("AttributesToGet");
              jsonWriter.array();

              for (String attributesToGetListValue : attributesToGetList) {
                if (attributesToGetListValue != null) {
                  jsonWriter.value(attributesToGetListValue);
                }
              }
              jsonWriter.endArray();
            }
            if (requestItemsListValue.getValue().isConsistentRead() != null) {
              jsonWriter
                  .key("ConsistentRead")
                  .value(requestItemsListValue.getValue().isConsistentRead());
            }
            jsonWriter.endObject();
          }
        }
        jsonWriter.endObject();
      }

      jsonWriter.endObject();

      String snippet = stringWriter.toString();
      byte[] content = snippet.getBytes("UTF-8");
      request.setContent(new StringInputStream(snippet));
      request.addHeader("Content-Length", Integer.toString(content.length));
    } catch (Throwable t) {
      throw new AmazonClientException("Unable to marshall request to JSON: " + t.getMessage(), t);
    }

    return request;
  }