Package stream.nebula.operators

Class InferModelOperator

java.lang.Object

stream.nebula.operators.Operator

stream.nebula.operators.InferModelOperator

public class InferModelOperator
extends Operator

Operator class that encodes the Query.inferModel(java.io.InputStream, java.lang.String) method.

This class follows the builder pattern. Methods such as Query.inferModel(java.io.InputStream, java.lang.String) and InferModelOperator.InferModelOn.on(stream.nebula.expression.FieldExpression...) return helper classes InferModelOperator.InferModelOn and InferModelOperator.InferModelAs which manipulate the state of this InferModelOperator instance; finally InferModelOperator.InferModelAs.as(stream.nebula.expression.TypedFieldExpression...) returns the original Query instance.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	InferModelOperator.InferModelAs	Helper inner class to set the output attributes in the InferModelOperator.InferModelAs.as(stream.nebula.expression.TypedFieldExpression...) method, which contain the result of the TensorFlow model.
class	InferModelOperator.InferModelOn	Helper inner class to set the input attributes which are passed to the TensorFlow model in the InferModelOperator.InferModelOn.on(stream.nebula.expression.FieldExpression...) method.

Field Summary

Fields inherited from class stream.nebula.operators.Operator

childOperator

Constructor Summary

Constructors

Constructor	Description
InferModelOperator(@NonNull Operator childOperator, @NonNull java.io.InputStream model, @NonNull java.lang.String name, @NonNull Query query)	Create a new InferModelOperator.

Method Summary

Modifier and Type	Method	Description
java.util.List<FieldExpression>	getInputAttributes()	Access the input attributes.
byte[]	getModel()	Access the TensorFlow model as a byte array.
java.lang.String	getName()	Access the model name.
java.util.List<TypedFieldExpression>	getOutputAttributes()	Access the output attributes.

Methods inherited from class stream.nebula.operators.Operator

getChildOperator

Methods inherited from class java.lang.Object

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

Constructor Detail

InferModelOperator

public InferModelOperator(@NonNull Operator childOperator,
                          @NonNull java.io.InputStream model,
                          @NonNull java.lang.String name,
                          @NonNull Query query)
                   throws java.io.IOException

Create a new InferModelOperator.

Parameters:

childOperator - The previous operator in the operator chain of Query instance.

model - An input stream containing the TensorFlow model.

name - The name of the model. Used internally as the filename under which the model is temporarily stored on the worker. It is the responsibility of the client code that this name is unique.

query - The Query instance on which Query.joinWith(stream.nebula.runtime.Query) was called.

Throws:

java.lang.IllegalArgumentException - If model is null.

java.io.IOException - If the input stream cannot be read.

Method Detail

getModel

public byte[] getModel()

Access the TensorFlow model as a byte array.

Returns:

The TensorFlow model.

getName

public java.lang.String getName()

Access the model name.

Returns:

The model name.

getInputAttributes

public java.util.List<FieldExpression> getInputAttributes()

Access the input attributes.

Returns:

The list of input attributes.

getOutputAttributes

public java.util.List<TypedFieldExpression> getOutputAttributes()

Access the output attributes.

Returns:

The list of output attributes.