package com.amazonaws.services.dynamodbv2.json.converter; import java.io.IOException; import java.util.Map; import com.amazonaws.services.dynamodbv2.model.AttributeValue; /** * Utility for transforming between Jackson JSON streaming representation and DynamoDB format. */ public interface JacksonStreamReader { /** * Looks for the beginning of the next JSON object in the JsonParser and generates a map of AttributeValues that * represents the JSON object. If the internal JsonParser's current token is the beginning of a JSON array, it * advances to the next token and tries to find an object in the array. * * @return A map of AttributeValues that represents the JSON object. Null if the end of stream is reached. * @throws IOException * Error reading stream */ Map<String, AttributeValue> getNextItem() throws IOException; /** * Seeks for a field specified with the argument and advances the JsonParser to the value of the field. * * @param fieldName * The key of the field to seek * @return True if a field with the specified name is found. False, otherwise. * @throws IOException * Error reading stream */ boolean seek(String fieldName) throws IOException; }