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The AWS SDK for Java with support for OSGi. The AWS SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Amazon S3, Amazon EC2, Amazon SQS, Amazon Relational Database Service, Amazon AutoScaling, etc).

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/*
 * Copyright 2011-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *    http://aws.amazon.com/apache2.0
 *
 * This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES
 * OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and
 * limitations under the License.
 */
package com.amazonaws.services.dynamodbv2.datamodeling;

import java.lang.reflect.Method;
import java.text.ParseException;

import com.amazonaws.services.dynamodbv2.model.AttributeValue;

/**
 * Unmarshaller interface to make it possible to cache the expensive
 * type-determination behavior necessary when turning a service result back
 * into an object.
 */
public interface ArgumentUnmarshaller {

    /**
     * Asserts that the value given can be processed using the setter given.
     */
    void typeCheck(AttributeValue value, Method setter);

    /**
     * Unmarshalls the {@link AttributeValue} given into an instance of the
     * appropriate type, as determined by {@link DynamoDBReflector} and
     * {@link DynamoDBMapper}
     *
     * @throws ParseException when unable to parse a date string
     */
    Object unmarshall(AttributeValue value) throws ParseException;
}