Example usage for com.google.gson JsonNull INSTANCE

Introduction

In this page you can find the example usage for com.google.gson JsonNull INSTANCE.

Prototype

JsonNull INSTANCE

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Document

singleton for JsonNull

Usage

From source file:geomesa.example.twitter.ingest.TwitterParser.java

License:Apache License

private void conditionalSetArray(SimpleFeatureBuilder builder, JsonObject obj, String feature) {
    JsonElement a = obj.get(feature);/*from w ww. j  a  va2 s  .  c om*/
    if (a != null && a != JsonNull.INSTANCE) {
        for (Iterator<JsonElement> i = ((JsonArray) a).iterator(); i.hasNext();) {
            JsonElement e = i.next();
            if (e != null && e != JsonNull.INSTANCE) {
                builder.set(feature, e.getAsString());
            }
        }
    }
}

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From source file:geomesa.example.twitter.ingest.TwitterParser.java

License:Apache License

private void conditionalSetString(SimpleFeatureBuilder builder, JsonObject obj, String feature) {
    JsonElement e = obj.get(feature);//from   w w  w .ja  v  a2 s.  c om
    if (e != null && e != JsonNull.INSTANCE) {
        builder.set(feature, e.getAsString());
    }
}

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From source file:geomesa.example.twitter.ingest.TwitterParser.java

License:Apache License

private void conditionalSetObjectArray(SimpleFeature sf, JsonObject obj, String feature,
        String nestedAttribute) {

    JsonElement object = obj.get(feature);
    if (object != null && object != JsonNull.INSTANCE) {
        List<String> values = new ArrayList<>();
        for (Iterator<JsonElement> iter = ((JsonArray) object).iterator(); iter.hasNext();) {
            JsonElement next = iter.next();
            if (next != null && next != JsonNull.INSTANCE) {
                JsonElement attribute = ((JsonObject) next).get(nestedAttribute);
                if (attribute != null && attribute != JsonNull.INSTANCE) {
                    values.add(attribute.getAsString());
                }//from  w w w.  j av  a  2s .c  om
            }
        }
        if (!values.isEmpty()) {
            sf.setAttribute(feature, Joiner.on(",").join(values));
        }
    }
}

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From source file:geomesa.example.twitter.ingest.TwitterParser.java

License:Apache License

private void conditionalSetArray(SimpleFeature sf, JsonObject obj, String feature) {
    JsonElement a = obj.get(feature);/*from  w w w  .  j a v  a2 s .c o  m*/
    if (a != null && a != JsonNull.INSTANCE) {
        for (Iterator<JsonElement> i = ((JsonArray) a).iterator(); i.hasNext();) {
            JsonElement e = i.next();
            if (e != null && e != JsonNull.INSTANCE) {
                sf.setAttribute(feature, e.getAsString());
            }
        }
    }
}

---

From source file:geomesa.example.twitter.ingest.TwitterParser.java

License:Apache License

private void conditionalSetString(SimpleFeature sf, JsonObject obj, String feature) {
    JsonElement e = obj.get(feature);/*from  w  w  w  .j  a v  a  2 s .  co m*/
    if (e != null && e != JsonNull.INSTANCE) {
        sf.setAttribute(feature, e.getAsString());
    }
}

---

From source file:geomesa.example.twitter.ingest.TwitterParser.java

License:Apache License

private JsonObject next(final JsonParser parser, final JsonReader reader, final String sourceName)
        throws IOException {
    while (reader.hasNext() && reader.peek() != JsonToken.END_DOCUMENT) {
        try {/*from ww w.j  a v a  2  s . c om*/
            final JsonElement element = parser.parse(reader);
            if (element != null && element != JsonNull.INSTANCE) {
                return element.getAsJsonObject();
            }
        } catch (Exception e) {
            log.error(sourceName + " - error parsing json", e);
            return null;
        }
    }
    return null;
}

---

From source file:gobblin.converter.csv.CsvToJsonConverter.java

License:Apache License

/**
 * Takes in a record with format String and splits the data based on SOURCE_SCHEMA_DELIMITER
 * Uses the inputSchema and the split record to convert the record to a JsonObject
 * @return a JsonObject representing the record
 * @throws IOException/*from w w  w.j a v  a 2s .  c  o m*/
 */
@Override
public Iterable<JsonObject> convertRecord(JsonArray outputSchema, String inputRecord, WorkUnitState workUnit)
        throws DataConversionException {
    String strDelimiter = workUnit.getProp(ConfigurationKeys.CONVERTER_CSV_TO_JSON_DELIMITER);
    if (Strings.isNullOrEmpty(strDelimiter)) {
        throw new IllegalArgumentException("Delimiter cannot be empty");
    }
    InputStreamCSVReader reader = new InputStreamCSVReader(inputRecord, strDelimiter.charAt(0),
            workUnit.getProp(ConfigurationKeys.CONVERTER_CSV_TO_JSON_ENCLOSEDCHAR,
                    ConfigurationKeys.DEFAULT_CONVERTER_CSV_TO_JSON_ENCLOSEDCHAR).charAt(0));
    List<String> recordSplit;
    try {
        recordSplit = Lists.newArrayList(reader.splitRecord());
    } catch (IOException e) {
        throw new DataConversionException(e);
    }
    JsonObject outputRecord = new JsonObject();

    for (int i = 0; i < outputSchema.size(); i++) {
        if (i < recordSplit.size()) {
            if (recordSplit.get(i) == null) {
                outputRecord.add(outputSchema.get(i).getAsJsonObject().get("columnName").getAsString(),
                        JsonNull.INSTANCE);
            } else if (recordSplit.get(i).isEmpty() || recordSplit.get(i).toLowerCase().equals(NULL)) {
                outputRecord.add(outputSchema.get(i).getAsJsonObject().get("columnName").getAsString(),
                        JsonNull.INSTANCE);
            } else {
                outputRecord.addProperty(outputSchema.get(i).getAsJsonObject().get("columnName").getAsString(),
                        recordSplit.get(i));
            }
        } else {
            outputRecord.add(outputSchema.get(i).getAsJsonObject().get("columnName").getAsString(),
                    JsonNull.INSTANCE);
        }
    }

    return new SingleRecordIterable<>(outputRecord);
}

---

From source file:gobblin.converter.csv.CsvToJsonConverterV2.java

License:Apache License

@VisibleForTesting
JsonObject createOutput(JsonArray outputSchema, String[] inputRecord) {
    Preconditions.checkArgument(outputSchema.size() == inputRecord.length,
            "# of columns mismatch. Input " + inputRecord.length + " , output: " + outputSchema.size());
    JsonObject outputRecord = new JsonObject();

    for (int i = 0; i < outputSchema.size(); i++) {
        String key = outputSchema.get(i).getAsJsonObject().get(COLUMN_NAME_KEY).getAsString();

        if (StringUtils.isEmpty(inputRecord[i]) || JSON_NULL_VAL.equalsIgnoreCase(inputRecord[i])) {
            outputRecord.add(key, JsonNull.INSTANCE);
        } else {//from   ww w.  ja  va 2  s. c o m
            outputRecord.addProperty(key, inputRecord[i]);
        }
    }

    return outputRecord;
}

---

From source file:gobblin.converter.csv.CsvToJsonConverterV2.java

License:Apache License

@VisibleForTesting
JsonObject createOutput(JsonArray outputSchema, String[] inputRecord, List<String> customOrder) {

    Preconditions.checkArgument(outputSchema.size() == customOrder.size(),
            "# of columns mismatch. Input " + outputSchema.size() + " , output: " + customOrder.size());
    JsonObject outputRecord = new JsonObject();
    Iterator<JsonElement> outputSchemaIterator = outputSchema.iterator();
    Iterator<String> customOrderIterator = customOrder.iterator();

    while (outputSchemaIterator.hasNext() && customOrderIterator.hasNext()) {
        String key = outputSchemaIterator.next().getAsJsonObject().get(COLUMN_NAME_KEY).getAsString();
        int i = Integer.parseInt(customOrderIterator.next());
        Preconditions.checkArgument(i < inputRecord.length,
                "Index out of bound detected in customer order. Index: " + i + " , # of CSV columns: "
                        + inputRecord.length);
        if (i < 0 || null == inputRecord[i] || JSON_NULL_VAL.equalsIgnoreCase(inputRecord[i])) {
            outputRecord.add(key, JsonNull.INSTANCE);
            continue;
        }//  w w  w .ja  v a  2  s.com
        outputRecord.addProperty(key, inputRecord[i]);
    }

    return outputRecord;
}

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From source file:gobblin.converter.json.JsonStringToJsonIntermediateConverter.java

License:Apache License

/**
 * Takes in a record with format String and Uses the inputSchema to convert the record to a JsonObject
 * @return a JsonObject representing the record
 * @throws IOException/*from w w w  .j  a v  a  2 s  . c o m*/
 */
@Override
public Iterable<JsonObject> convertRecord(JsonArray outputSchema, String strInputRecord, WorkUnitState workUnit)
        throws DataConversionException {
    JsonParser jsonParser = new JsonParser();
    JsonObject inputRecord = (JsonObject) jsonParser.parse(strInputRecord);

    if (!this.unpackComplexSchemas) {
        return new SingleRecordIterable<>(inputRecord);
    }

    JsonObject outputRecord = new JsonObject();

    for (int i = 0; i < outputSchema.size(); i++) {
        String expectedColumnName = outputSchema.get(i).getAsJsonObject().get("columnName").getAsString();

        if (inputRecord.has(expectedColumnName)) {
            //As currently gobblin.converter.avro.JsonIntermediateToAvroConverter is not able to handle complex schema's so storing it as string

            if (inputRecord.get(expectedColumnName).isJsonArray()) {
                outputRecord.addProperty(expectedColumnName, inputRecord.get(expectedColumnName).toString());
            } else if (inputRecord.get(expectedColumnName).isJsonObject()) {
                //To check if internally in an JsonObject there is multiple hierarchy
                boolean isMultiHierarchyInsideJsonObject = false;
                for (Map.Entry<String, JsonElement> entry : ((JsonObject) inputRecord.get(expectedColumnName))
                        .entrySet()) {
                    if (entry.getValue().isJsonArray() || entry.getValue().isJsonObject()) {
                        isMultiHierarchyInsideJsonObject = true;
                        break;
                    }
                }
                if (isMultiHierarchyInsideJsonObject) {
                    outputRecord.addProperty(expectedColumnName,
                            inputRecord.get(expectedColumnName).toString());
                } else {
                    outputRecord.add(expectedColumnName, inputRecord.get(expectedColumnName));
                }

            } else {
                outputRecord.add(expectedColumnName, inputRecord.get(expectedColumnName));
            }
        } else {
            outputRecord.add(expectedColumnName, JsonNull.INSTANCE);
        }

    }
    return new SingleRecordIterable<>(outputRecord);
}

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