com.gluonhq.connect.provider

Class OutputStreamObjectDataWriter<T>

java.lang.Object

com.gluonhq.connect.provider.OutputStreamObjectDataWriter<T>

Type Parameters:

T - the type of the object to write

All Implemented Interfaces:

ObjectDataWriter<T>

public class OutputStreamObjectDataWriter<T>
extends java.lang.Object
implements ObjectDataWriter<T>

A helper class that represents an ObjectDataWriter that writes an object by converting it with a specific OutputStreamOutputConverter and writing it to a specific OutputDataSource.

Constructor Summary

Constructors

Constructor and Description
OutputStreamObjectDataWriter(OutputDataSource dataSource, OutputStreamOutputConverter<T> converter) Construct an instance that will use the specified data source to write the object to that is converted with the specified converter.

Method Summary

Modifier and Type	Method and Description
GluonObservableObject<T>	newGluonObservableObject() Provide an instance of a GluonObservableObject.
java.util.Optional<T>	writeObject(T object) Writes the object to the specified data source and returns an Optional that contains the exact same object instance that was passed in.

Methods inherited from class java.lang.Object

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

Constructor Detail

OutputStreamObjectDataWriter

public OutputStreamObjectDataWriter(OutputDataSource dataSource,
                                    OutputStreamOutputConverter<T> converter)

Construct an instance that will use the specified data source to write the object to that is converted with the specified converter. The OutputStream of the OutputDataSource will be set on the Converter before calling its write method.

Parameters:

dataSource - the data source where the converted object will be written to

converter - the converter that is used for converting the object to be written

Method Detail

newGluonObservableObject

public GluonObservableObject<T> newGluonObservableObject()

Description copied from interface: ObjectDataWriter

Provide an instance of a GluonObservableObject. This method is called by DataProvider.storeObject(Object, ObjectDataWriter) to get a GluonObservableObject that will contain the actual object when the store operation has completed successfully. Most implementations will just return an instance of GluonObservableObject itself. Note that it is perfectly valid to return existing instances of GluonObservableObject.

Specified by:

newGluonObservableObject in interface ObjectDataWriter<T>

Returns:

an instance of a GluonObservableObject

writeObject

public java.util.Optional<T> writeObject(T object)
                                  throws java.io.IOException

Writes the object to the specified data source and returns an Optional that contains the exact same object instance that was passed in. This implementation uses the specified converter to convert the provided object. The OutputStream of the specified data source will be set on the converter, before calling the write method on the converter.

Specified by:

writeObject in interface ObjectDataWriter<T>

Parameters:

object - the object to write

Returns:

the object that will ultimately be set on the GluonObservableObject

Throws:

java.io.IOException - when an exception occurred during the write process