com.flipkart.batchdemo.adapter.CustomTagDataAdapter.java Source code

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Here is the source code for com.flipkart.batchdemo.adapter.CustomTagDataAdapter.java

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/*
 *  The MIT License (MIT)
 *
 *  Copyright (c) 2017 Flipkart Internet Pvt. Ltd.
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in
 *  all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *  THE SOFTWARE.
 */

package com.flipkart.batchdemo.adapter;

import com.flipkart.batchdemo.CustomTagData;
import com.flipkart.batching.core.data.Tag;
import com.flipkart.batching.gson.adapters.BatchingTypeAdapters;
import com.flipkart.batching.gson.adapters.data.TagTypeAdapter;
import com.google.gson.Gson;
import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonWriter;

import org.json.JSONObject;

import java.io.IOException;

public class CustomTagDataAdapter extends TypeAdapter<CustomTagData> {

    private TypeAdapter<Tag> tagTypeAdapter;
    private final Gson gson = new Gson();

    public CustomTagDataAdapter() {
        this.tagTypeAdapter = new TagTypeAdapter();
    }

    @Override
    public void write(JsonWriter writer, CustomTagData object) throws IOException {
        writer.beginObject();
        if (object == null) {
            writer.endObject();
            return;
        }

        if (object.getTag() != null) {
            writer.name("tag");
            tagTypeAdapter.write(writer, object.getTag());
        }

        if (object.event != null) {
            writer.name("event");
            BatchingTypeAdapters.getJSONObjectTypeAdapter(gson).write(writer, object.event);
        }

        writer.name("eventId");
        writer.value(object.getEventId());

        writer.endObject();
    }

    @Override
    public CustomTagData read(JsonReader reader) throws IOException {
        if (reader.peek() == com.google.gson.stream.JsonToken.NULL) {
            reader.nextNull();
            return null;
        }
        if (reader.peek() != com.google.gson.stream.JsonToken.BEGIN_OBJECT) {
            reader.skipValue();
            return null;
        }
        reader.beginObject();

        Tag tag = null;
        Long eventId = 0L;
        JSONObject event = null;
        while (reader.hasNext()) {
            String name = reader.nextName();
            com.google.gson.stream.JsonToken jsonToken = reader.peek();
            if (jsonToken == com.google.gson.stream.JsonToken.NULL) {
                reader.skipValue();
                continue;
            }
            switch (name) {
            case "tag":
                tag = tagTypeAdapter.read(reader);
                break;
            case "eventId":
                eventId = BatchingTypeAdapters.LONG.read(reader);
                break;
            case "event":
                event = BatchingTypeAdapters.getJSONObjectTypeAdapter(gson).read(reader);
                break;
            default:
                reader.skipValue();
                break;
            }
        }

        reader.endObject();
        CustomTagData customTagData = new CustomTagData(tag, event);
        customTagData.setEventId(eventId);
        return customTagData;
    }
}