Example usage for com.google.gson.stream JsonReader nextNull

Introduction

In this page you can find the example usage for com.google.gson.stream JsonReader nextNull.

Prototype

public void nextNull() throws IOException

Source Link

Document

Consumes the next token from the JSON stream and asserts that it is a literal null.

Usage

From source file:com.continuuity.loom.codec.json.LowercaseEnumTypeAdapterFactory.java

License:Apache License

public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
    Class<T> rawType = (Class<T>) type.getRawType();
    if (!rawType.isEnum()) {
        return null;
    }/*  www.  j  a  va 2s.  co m*/

    final Map<String, T> lowercaseToConstant = Maps.newHashMap();
    for (T constant : rawType.getEnumConstants()) {
        lowercaseToConstant.put(toLowercase(constant), constant);
    }

    return new TypeAdapter<T>() {
        public void write(JsonWriter out, T value) throws IOException {
            if (value == null) {
                out.nullValue();
            } else {
                out.value(toLowercase(value));
            }
        }

        public T read(JsonReader reader) throws IOException {
            if (reader.peek() == JsonToken.NULL) {
                reader.nextNull();
                return null;
            } else {
                String next = reader.nextString();
                return lowercaseToConstant.get(next);
            }
        }
    };
}

From source file:com.ecwid.mailchimp.internal.gson.MailChimpObjectTypeAdapter.java

License:Apache License

@Override
public MailChimpObject read(JsonReader in) throws IOException {
    if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
    }// w  w  w. ja  v  a2  s  .com

    MailChimpObject result;
    try {
        result = constructor.newInstance();
    } catch (Exception e) {
        throw new RuntimeException("Failed to invoke " + constructor + " with no args", e);
    }

    in.beginObject();
    while (in.hasNext()) {
        final String key;
        if (in.peek() == JsonToken.NAME) {
            key = in.nextName();
        } else {
            key = in.nextString();
        }

        final Object value;

        Type valueType = result.getReflectiveMappingTypes().get(key);
        if (valueType != null) {
            value = gson.getAdapter(TypeToken.get(valueType)).read(in);
        } else {
            if (in.peek() == JsonToken.BEGIN_OBJECT) {
                value = gson.getAdapter(MailChimpObject.class).read(in);
            } else if (in.peek() == JsonToken.BEGIN_ARRAY) {
                value = readList(in);
            } else {
                value = gson.getAdapter(Object.class).read(in);
            }
        }

        if (result.put(key, value) != null) {
            throw new JsonSyntaxException("duplicate key: " + key);
        }
    }
    in.endObject();

    return result;
}

From source file:com.flipkart.batchdemo.adapter.CustomTagDataAdapter.java

License:Open Source License

@Override
public CustomTagData read(JsonReader reader) throws IOException {
    if (reader.peek() == com.google.gson.stream.JsonToken.NULL) {
        reader.nextNull();
        return null;
    }/*from ww  w .j a va  2  s .  c  o m*/
    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;
}

From source file:com.flipkart.batching.gson.adapters.batch.SizeBatchTypeAdapter.java

License:Open Source License

@Override
public SizeBatch<T> read(JsonReader reader) throws IOException {
    if (reader.peek() == com.google.gson.stream.JsonToken.NULL) {
        reader.nextNull();
        return null;
    }// w  ww .  j a  v  a  2 s . c o  m
    if (reader.peek() != com.google.gson.stream.JsonToken.BEGIN_OBJECT) {
        reader.skipValue();
        return null;
    }
    reader.beginObject();

    int maxBatchSize = 0;
    DataCollection<T> dataCollection = 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 "maxBatchSize":
            maxBatchSize = BatchingTypeAdapters.INTEGER.read(reader);
            break;
        case "dataCollection":
            dataCollection = typeAdapter.read(reader);
            break;
        default:
            reader.skipValue();
            break;
        }
    }

    reader.endObject();
    return dataCollection == null ? null : new SizeBatch<>(dataCollection.dataCollection, maxBatchSize);
}

From source file:com.flipkart.batching.gson.adapters.batch.SizeTimeBatchTypeAdapter.java

License:Open Source License

@Override
public SizeTimeBatch<T> read(JsonReader reader) throws IOException {
    if (reader.peek() == com.google.gson.stream.JsonToken.NULL) {
        reader.nextNull();
        return null;
    }/*from  ww w . j  a v  a2s  .c  o m*/
    if (reader.peek() != com.google.gson.stream.JsonToken.BEGIN_OBJECT) {
        reader.skipValue();
        return null;
    }
    reader.beginObject();

    int maxBatchSize = 0;
    DataCollection<T> dataCollection = null;
    long timeout = 0L;

    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 "maxBatchSize":
            maxBatchSize = BatchingTypeAdapters.INTEGER.read(reader);
            break;
        case "dataCollection":
            dataCollection = typeAdapter.read(reader);
            break;
        case "timeOut":
            timeout = BatchingTypeAdapters.LONG.read(reader);
            break;
        default:
            reader.skipValue();
            break;
        }
    }

    reader.endObject();
    return dataCollection == null ? null
            : new SizeTimeBatch<>(dataCollection.dataCollection, maxBatchSize, timeout);
}

From source file:com.flipkart.batching.gson.adapters.batch.TagBatchTypeAdapter.java

License:Open Source License

@Override
public TagBatch<T> read(JsonReader reader) throws IOException {
    if (reader.peek() == com.google.gson.stream.JsonToken.NULL) {
        reader.nextNull();
        return null;
    }// ww w  .  j  a  v  a 2s  . co m
    if (reader.peek() != com.google.gson.stream.JsonToken.BEGIN_OBJECT) {
        reader.skipValue();
        return null;
    }
    reader.beginObject();

    Tag tag = null;
    DataCollection<T> collection = 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 "dataCollection":
            collection = typeAdapter.read(reader);
            break;
        default:
            reader.skipValue();
            break;
        }
    }

    reader.endObject();
    return collection == null || tag == null ? null
            : new TagBatch<>(tag, new BatchImpl<>(collection.dataCollection));
}

From source file:com.flipkart.batching.gson.adapters.batch.TimeBatchTypeAdapter.java

License:Open Source License

@Override
public TimeBatch<T> read(JsonReader reader) throws IOException {
    if (reader.peek() == com.google.gson.stream.JsonToken.NULL) {
        reader.nextNull();
        return null;
    }//from  w  w w  . j av  a  2  s  .com
    if (reader.peek() != com.google.gson.stream.JsonToken.BEGIN_OBJECT) {
        reader.skipValue();
        return null;
    }
    reader.beginObject();

    long timeOut = 0L;
    DataCollection<T> dataCollection = 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 "timeOut":
            timeOut = BatchingTypeAdapters.LONG.read(reader);
            break;
        case "dataCollection":
            dataCollection = typeAdapter.read(reader);
            break;
        default:
            reader.skipValue();
            break;
        }
    }

    reader.endObject();
    return dataCollection == null ? null : new TimeBatch<>(dataCollection.dataCollection, timeOut);
}

From source file:com.flipkart.batching.gson.adapters.BatchImplTypeAdapter.java

License:Open Source License

@Override
public BatchImpl<T> read(JsonReader reader) throws IOException {
    if (reader.peek() == com.google.gson.stream.JsonToken.NULL) {
        reader.nextNull();
        return null;
    }/*from w  ww  .j  ava 2 s.  c  o m*/
    if (reader.peek() != com.google.gson.stream.JsonToken.BEGIN_OBJECT) {
        reader.skipValue();
        return null;
    }
    reader.beginObject();

    DataCollection<T> dataCollection = 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 "dataCollection":
            dataCollection = typeAdapter.read(reader);
            break;
        default:
            reader.skipValue();
            break;
        }
    }

    reader.endObject();
    return dataCollection == null ? null : new BatchImpl<T>(dataCollection.dataCollection);
}

From source file:com.flipkart.batching.gson.adapters.data.EventDataTypeAdapter.java

License:Open Source License

@Override
public EventData read(JsonReader reader) throws IOException {
    if (reader.peek() == com.google.gson.stream.JsonToken.NULL) {
        reader.nextNull();
        return null;
    }//w  ww  .  j  a  va  2s .c om
    if (reader.peek() != com.google.gson.stream.JsonToken.BEGIN_OBJECT) {
        reader.skipValue();
        return null;
    }
    reader.beginObject();

    EventData object = new EventData();
    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 "eventId":
            object.setEventId(BatchingTypeAdapters.LONG.read(reader));
            break;
        default:
            reader.skipValue();
            break;
        }
    }

    reader.endObject();
    return object;
}

From source file:com.flipkart.batching.gson.adapters.data.TagDataTypeAdapter.java

License:Open Source License

@Override
public TagData read(JsonReader reader) throws IOException {
    if (reader.peek() == com.google.gson.stream.JsonToken.NULL) {
        reader.nextNull();
        return null;
    }//from w w w  . ja v  a 2 s  . c  om
    if (reader.peek() != com.google.gson.stream.JsonToken.BEGIN_OBJECT) {
        reader.skipValue();
        return null;
    }
    reader.beginObject();

    Tag tag = null;
    long eventId = 0L;
    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;
        default:
            reader.skipValue();
            break;
        }
    }

    reader.endObject();
    TagData tagData = new TagData(tag);
    tagData.setEventId(eventId);
    return tagData;
}