com.uber.cadence.converter

Class JsonDataConverter

java.lang.Object

com.uber.cadence.converter.JsonDataConverter

All Implemented Interfaces:

DataConverter

public final class JsonDataConverter
extends java.lang.Object
implements DataConverter

Implements conversion through GSON JSON processor. To extend use JsonDataConverter(Function) constructor. Thrift structures are converted using TJSONProtocol. When using thrift only one argument of a method is expected.

Constructor Summary

Constructors

Constructor and Description
JsonDataConverter(java.util.function.Function<com.google.gson.GsonBuilder,com.google.gson.GsonBuilder> builderInterceptor) Constructs an instance giving an ability to override Gson initialization.

Method Summary

Modifier and Type	Method and Description
<T> T	fromData(byte[] content, java.lang.Class<T> valueClass, java.lang.reflect.Type valueType) Implements conversion of a single value.
java.lang.Object[]	fromDataArray(byte[] content, java.lang.reflect.Type... valueTypes) Implements conversion of an array of values of different types.
static DataConverter	getInstance()
byte[]	toData(java.lang.Object... values) When values is empty or it contains a single value and it is null then return empty blob.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JsonDataConverter

public JsonDataConverter(java.util.function.Function<com.google.gson.GsonBuilder,com.google.gson.GsonBuilder> builderInterceptor)

Constructs an instance giving an ability to override Gson initialization.

Parameters:

builderInterceptor - function that intercepts GsonBuilder construction.

Method Detail

getInstance

public static DataConverter getInstance()

toData

public byte[] toData(java.lang.Object... values)
              throws DataConverterException

When values is empty or it contains a single value and it is null then return empty blob. If a single value do not wrap it into Json array. Exception stack traces are converted to a single string stack trace to save space and make them more readable.

Specified by:

toData in interface DataConverter

Parameters:

values - Java value to convert to String.

Returns:

converted value

Throws:

DataConverterException - if conversion of the value passed as parameter failed for any reason.

fromData

public <T> T fromData(byte[] content,
                      java.lang.Class<T> valueClass,
                      java.lang.reflect.Type valueType)
               throws DataConverterException

Description copied from interface: DataConverter

Implements conversion of a single value.

Specified by:

fromData in interface DataConverter

Parameters:

content - Serialized value to convert to a Java object.

Returns:

converted Java object

Throws:

DataConverterException - if conversion of the data passed as parameter failed for any reason.

fromDataArray

public java.lang.Object[] fromDataArray(byte[] content,
                                        java.lang.reflect.Type... valueTypes)
                                 throws DataConverterException

Description copied from interface: DataConverter

Implements conversion of an array of values of different types. Useful for deserializing arguments of function invocations.

Specified by:

fromDataArray in interface DataConverter

Parameters:

content - serialized value to convert to Java objects.

Returns:

array of converted Java objects

Throws:

DataConverterException - if conversion of the data passed as parameter failed for any reason.