com.amazonaws.services.s3.model.transform.BucketNotificationConfigurationStaxUnmarshaller Maven / Gradle / Ivy

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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 2015-2016 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.services.s3.model.transform;

import java.io.InputStream;
import java.util.Map.Entry;

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.events.XMLEvent;

import com.amazonaws.services.s3.model.BucketNotificationConfiguration;
import com.amazonaws.services.s3.model.NotificationConfiguration;
import com.amazonaws.transform.StaxUnmarshallerContext;
import com.amazonaws.transform.Unmarshaller;

public class BucketNotificationConfigurationStaxUnmarshaller implements
        Unmarshaller {

    private static BucketNotificationConfigurationStaxUnmarshaller instance = new BucketNotificationConfigurationStaxUnmarshaller();

    public static BucketNotificationConfigurationStaxUnmarshaller getInstance() {
        return instance;
    }

    private final XMLInputFactory inputFactory = XMLInputFactory.newInstance();

    private BucketNotificationConfigurationStaxUnmarshaller() {
    }

    @Override
    public BucketNotificationConfiguration unmarshall(InputStream inputStream) throws Exception {
        StaxUnmarshallerContext context;
        synchronized (inputFactory) {
            context = new StaxUnmarshallerContext(inputFactory.createXMLEventReader(inputStream));
        }
        int originalDepth = context.getCurrentDepth();
        int targetDepth = originalDepth + 1;

        if (context.isStartOfDocument()) {
            targetDepth += 1;
        }

        BucketNotificationConfiguration config = new BucketNotificationConfiguration();

        while (true) {
            XMLEvent xmlEvent = context.nextEvent();
            if (xmlEvent.isEndDocument()) {
                return config;
            }
            if (xmlEvent.isAttribute() || xmlEvent.isStartElement()) {
                if (context.testExpression("TopicConfiguration", targetDepth)) {
                    Entry entry = TopicConfigurationStaxUnmarshaller.getInstance()
                            .unmarshall(context);
                    config.addConfiguration(entry.getKey(), entry.getValue());
                } else if (context.testExpression("QueueConfiguration", targetDepth)) {
                    Entry entry = QueueConfigurationStaxUnmarshaller.getInstance()
                            .unmarshall(context);
                    config.addConfiguration(entry.getKey(), entry.getValue());
                } else if (context.testExpression("CloudFunctionConfiguration", targetDepth)) {
                    Entry entry = LambdaConfigurationStaxUnmarshaller.getInstance()
                            .unmarshall(context);
                    config.addConfiguration(entry.getKey(), entry.getValue());
                }
            } else if (xmlEvent.isEndElement()) {
                if (context.getCurrentDepth() < originalDepth) {
                    return config;
                }
            }
        }
    }

}