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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 (c) 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.
 * A copy of the License is located at
 *
 * http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. 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.protocol.json;

import com.amazonaws.annotation.SdkInternalApi;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.dataformat.cbor.CBORGenerator;

import java.io.IOException;
import java.util.Date;

/**
 * Thin wrapper around Jackson's JSON generator for CBOR.
 */
@SdkInternalApi
class SdkCborGenerator extends SdkJsonGenerator {

    private static final int CBOR_TAG_TIMESTAP = 1;

    public SdkCborGenerator(JsonFactory factory, String contentType) {
        super(factory, contentType);
    }

    /**
     * Jackson doesn't have native support for timestamp. As per the RFC 7049
     * (https://tools.ietf.org/html/rfc7049#section-2.4.1) we will need to
     * write a tag and write the epoch.
     */
    @Override
    public StructuredJsonGenerator writeValue(Date date) {

        if (!(getGenerator() instanceof CBORGenerator)) {
            throw new IllegalStateException("SdkCborGenerator is not created " +
                    "with a CBORGenerator.");
        }

        CBORGenerator generator = (CBORGenerator) getGenerator();
        try {
            generator.writeTag(CBOR_TAG_TIMESTAP);
            generator.writeNumber(date.getTime());
        } catch (IOException e) {
            throw new JsonGenerationException(e);
        }
        return this;
    }
}