com.amazonaws.services.sns.model.transform.GetTopicAttributesResultStaxUnmarshaller Maven / Gradle / Ivy

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The AWS Java SDK for Amazon SNS module holds the client classes that is used for communicating with Amazon Simple Notification Service
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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.*;

/**
 * Get Topic Attributes Result StAX Unmarshaller
 */
public class GetTopicAttributesResultStaxUnmarshaller 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 GetTopicAttributesResult unmarshall(StaxUnmarshallerContext context) throws Exception {
        GetTopicAttributesResult getTopicAttributesResult = new GetTopicAttributesResult();
        int originalDepth = context.getCurrentDepth();
        int targetDepth = originalDepth + 1;

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

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

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

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