.js

public Product get(String id) throws IOException {
    Product product = null;

    HashMap<String, AttributeValue> av = new HashMap<String, AttributeValue>();
    av.put(":v1", new AttributeValue().withS(id));

    DynamoDBQueryExpression<Product> queryExp = new DynamoDBQueryExpression<Product>()
        .withKeyConditionExpression("id = :v1")
        .withExpressionAttributeValues(av);

    PaginatedQueryList<Product> result = this.mapper.query(Product.class, queryExp);
    if (result.size() > 0) {
      product = result.get(0);
      logger.info("Products - get(): product - " + product.toString());
    } else {
      logger.info("Products - get(): product - Not Found.");
    }
    return product;
}