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The Amazon Web Services 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 2010-2014 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.sns.model.transform;

import java.util.Map;
import java.util.Map.Entry;

import javax.xml.stream.events.XMLEvent;

import com.amazonaws.services.sns.model.*;
import com.amazonaws.transform.Unmarshaller;
import com.amazonaws.transform.MapEntry;
import com.amazonaws.transform.StaxUnmarshallerContext;
import com.amazonaws.transform.SimpleTypeStaxUnmarshallers.*;

/**
 * Platform Application StAX Unmarshaller
 */
public class PlatformApplicationStaxUnmarshaller implements Unmarshaller {
    private static class AttributesMapEntryUnmarshaller implements Unmarshaller, StaxUnmarshallerContext> {
        @Override
        public Entry unmarshall(StaxUnmarshallerContext context) throws Exception {
            int originalDepth = context.getCurrentDepth();
            int targetDepth = originalDepth + 1;

            MapEntry entry
                = new MapEntry();

            while (true) {
                XMLEvent xmlEvent = context.nextEvent();
                if (xmlEvent.isEndDocument()) return entry;

                if (xmlEvent.isAttribute() || xmlEvent.isStartElement()) {
                    if (context.testExpression("key", targetDepth)) {
                        entry.setKey(StringStaxUnmarshaller.getInstance().unmarshall(context));
                        continue;
                    }
                    if (context.testExpression("value", targetDepth)) {
                        entry.setValue(StringStaxUnmarshaller.getInstance().unmarshall(context));
                        continue;
                    }
                } else if (xmlEvent.isEndElement()) {
                    if (context.getCurrentDepth() < originalDepth) return entry;
                }
            }
        }

        private static AttributesMapEntryUnmarshaller instance;
        public static AttributesMapEntryUnmarshaller getInstance() {
            if (instance == null) instance = new AttributesMapEntryUnmarshaller();
            return instance;
        }

    }

    public PlatformApplication unmarshall(StaxUnmarshallerContext context) throws Exception {
        PlatformApplication platformApplication = new PlatformApplication();
        int originalDepth = context.getCurrentDepth();
        int targetDepth = originalDepth + 1;

        if (context.isStartOfDocument()) targetDepth += 2;

        while (true) {
            XMLEvent xmlEvent = context.nextEvent();
            if (xmlEvent.isEndDocument()) return platformApplication;

            if (xmlEvent.isAttribute() || xmlEvent.isStartElement()) {
                if (context.testExpression("PlatformApplicationArn", targetDepth)) {
                    platformApplication.setPlatformApplicationArn(StringStaxUnmarshaller.getInstance().unmarshall(context));
                    continue;
                }
                if (context.testExpression("Attributes/entry", targetDepth)) {
                    Entry entry = AttributesMapEntryUnmarshaller.getInstance().unmarshall(context);
                    platformApplication.getAttributes().put(entry.getKey(), entry.getValue());
                    continue;
                }
            } else if (xmlEvent.isEndElement()) {
                if (context.getCurrentDepth() < originalDepth) {
                    return platformApplication;
                }
            }
        }
    }

    private static PlatformApplicationStaxUnmarshaller instance;
    public static PlatformApplicationStaxUnmarshaller getInstance() {
        if (instance == null) instance = new PlatformApplicationStaxUnmarshaller();
        return instance;
    }
}