Example usage for com.google.gson JsonElement isJsonNull

Introduction

In this page you can find the example usage for com.google.gson JsonElement isJsonNull.

Prototype

public boolean isJsonNull()

Source Link

Document

provides check for verifying if this element represents a null value or not.

Usage

From source file:co.cask.cdap.internal.app.ProcedureSpecificationCodec.java

License:Apache License

@Override
public ProcedureSpecification deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
        throws JsonParseException {
    JsonObject jsonObj = json.getAsJsonObject();

    String className = jsonObj.get("className").getAsString();
    String name = jsonObj.get("name").getAsString();
    String description = jsonObj.get("description").getAsString();
    Set<String> dataSets = deserializeSet(jsonObj.get("datasets"), context, String.class);
    Map<String, String> properties = deserializeMap(jsonObj.get("properties"), context, String.class);
    ResourceSpecification resourceSpec = context.deserialize(jsonObj.get("resources"),
            new TypeToken<ResourceSpecification>() {
            }.getType());/*  w  w  w .  j  a  v a  2 s . co  m*/

    JsonElement instanceElem = jsonObj.get("instances");
    int instances = (instanceElem == null || instanceElem.isJsonNull()) ? 1
            : jsonObj.get("instances").getAsInt();
    return new DefaultProcedureSpecification(className, name, description, dataSets, properties, resourceSpec,
            instances);
}

From source file:co.vaughnvernon.tradercommon.media.AbstractJSONMediaReader.java

License:Apache License

protected JsonElement navigateTo(JsonObject aStartingJsonObject, String... aKeys) {
    if (aKeys.length == 0) {
        throw new IllegalArgumentException("Must specify one or more keys.");
    } else if (aKeys.length == 1 && (aKeys[0].startsWith("/") || aKeys[0].contains("."))) {
        aKeys = this.parsePath(aKeys[0]);
    }//from   ww w.j  a  v  a  2 s  .c o  m

    int keyIndex = 1;

    JsonElement element = this.elementFrom(aStartingJsonObject, aKeys[0]);

    if (!element.isJsonNull() && !element.isJsonPrimitive() && !element.isJsonArray()) {
        JsonObject object = element.getAsJsonObject();

        for (; element != null && !element.isJsonPrimitive() && keyIndex < aKeys.length; ++keyIndex) {

            element = this.elementFrom(object, aKeys[keyIndex]);

            if (!element.isJsonPrimitive()) {

                element = this.elementFrom(object, aKeys[keyIndex]);

                if (element.isJsonNull()) {
                    element = null;
                } else {
                    object = element.getAsJsonObject();
                }
            }
        }
    }

    if (element != null) {
        if (!element.isJsonNull()) {
            if (keyIndex != aKeys.length) {
                throw new IllegalArgumentException("Last name must reference a simple value.");
            }
        } else {
            element = null;
        }
    }

    return element;
}

From source file:com.addthis.hydra.task.source.bundleizer.GsonBundleizer.java

License:Apache License

public ValueObject fromGson(JsonElement gson) {
    if (gson.isJsonNull()) {
        return null;
    } else if (gson.isJsonObject()) {
        JsonObject object = gson.getAsJsonObject();
        ValueMap map = ValueFactory.createMap();
        for (Map.Entry<String, JsonElement> entry : object.entrySet()) {
            map.put(entry.getKey(), fromGson(entry.getValue()));
        }//from w  ww.j  a  va 2 s .  c  om
        return map;
    } else if (gson.isJsonArray()) {
        JsonArray gsonArray = gson.getAsJsonArray();
        ValueArray valueArray = ValueFactory.createArray(gsonArray.size());
        for (JsonElement arrayElement : gsonArray) {
            valueArray.add(fromGson(arrayElement));
        }
        return valueArray;
    } else {
        JsonPrimitive primitive = gson.getAsJsonPrimitive();
        if (primitive.isNumber()) {
            return ValueFactory.create(primitive.getAsDouble());
        } else {
            return ValueFactory.create(primitive.getAsString());
        }
    }
}

From source file:com.adr.datasql.orm.KindResultsJson.java

License:Apache License

@Override
public Integer getInt(String columnName) throws DataLinkException {
    JsonElement element = json.get(columnName);
    return element == null || element.isJsonNull() ? null : element.getAsInt();
}

From source file:com.adr.datasql.orm.KindResultsJson.java

License:Apache License

@Override
public String getString(String columnName) throws DataLinkException {
    JsonElement element = json.get(columnName);
    return element == null || element.isJsonNull() ? null : element.getAsString();
}

From source file:com.adr.datasql.orm.KindResultsJson.java

License:Apache License

@Override
public Double getDouble(String columnName) throws DataLinkException {
    JsonElement element = json.get(columnName);
    return element == null || element.isJsonNull() ? null : element.getAsDouble();
}

From source file:com.adr.datasql.orm.KindResultsJson.java

License:Apache License

@Override
public BigDecimal getBigDecimal(String columnName) throws DataLinkException {
    JsonElement element = json.get(columnName);
    return element == null || element.isJsonNull() ? null : element.getAsBigDecimal();
}

From source file:com.adr.datasql.orm.KindResultsJson.java

License:Apache License

@Override
public Boolean getBoolean(String columnName) throws DataLinkException {
    JsonElement element = json.get(columnName);
    return element == null || element.isJsonNull() ? null : element.getAsBoolean();

}

From source file:com.adr.datasql.orm.KindResultsJson.java

License:Apache License

@Override
public java.util.Date getTimestamp(String columnName) throws DataLinkException {
    JsonElement element = json.get(columnName);
    return element == null || element.isJsonNull() ? null
            : new Date(Instant.parse(element.getAsString()).toEpochMilli());
}

From source file:com.adr.datasql.orm.KindResultsJson.java

License:Apache License

@Override
public java.util.Date getDate(String columnName) throws DataLinkException {
    JsonElement element = json.get(columnName);
    return element == null || element.isJsonNull() ? null
            : new Date(LocalDate.parse(element.getAsString()).atStartOfDay(ZoneId.systemDefault()).toInstant()
                    .toEpochMilli());//ww  w  . j av  a  2  s .com

}