org.tensorflow

Class Operation

java.lang.Object

org.tensorflow.Operation

public final class Operation
extends Object

A Graph node that performs computation on Tensors.

An Operation is a node in a Graph that takes zero or more Tensors (produced by other Operations in the Graph) as input, and produces zero or more Tensors as output.

Operation instances are valid only as long as the Graph they are a part of is valid. Thus, if Graph.close() has been invoked, then methods on the Operation instance may fail with an IllegalStateException.

Operation instances are immutable and thread-safe.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
int	hashCode()
int	inputListLength(String name) Returns the size of the given inputs list of Tensors for this operation.
String	name() Returns the full name of the Operation.
int	numOutputs() Returns the number of tensors produced by this operation.
<T> Output<T>	output(int idx) Returns a symbolic handle to one of the tensors produced by this operation.
Output<?>[]	outputList(int idx, int length) Returns symbolic handles to a list of tensors produced by this operation.
int	outputListLength(String name) Returns the size of the list of Tensors produced by this operation.
String	toString()
String	type() Returns the type of the operation, i.e., the name of the computation performed by the operation.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

name

public String name()

Returns the full name of the Operation.

type

public String type()

Returns the type of the operation, i.e., the name of the computation performed by the operation.

numOutputs

public int numOutputs()

Returns the number of tensors produced by this operation.

outputListLength

public int outputListLength(String name)

Returns the size of the list of Tensors produced by this operation.

An Operation has multiple named outputs, each of which produces either a single tensor or a list of tensors. This method returns the size of the list of tensors for a specific named output of the operation.

Parameters:

name - identifier of the list of tensors (of which there may be many) produced by this operation.

Returns:

the size of the list of Tensors produced by this named output.

Throws:

IllegalArgumentException - if this operation has no output with the provided name.

outputList

public Output<?>[] outputList(int idx,
                              int length)

Returns symbolic handles to a list of tensors produced by this operation.

Parameters:

idx - index of the first tensor of the list

length - number of tensors in the list

Returns:

array of Output

output

public <T> Output<T> output(int idx)

Returns a symbolic handle to one of the tensors produced by this operation.

Warning: Does not check that the type of the tensor matches T. It is recommended to call this method with an explicit type parameter rather than letting it be inferred, e.g. operation.<Integer>output(0)

Type Parameters:

T - The expected element type of the tensors produced by this output.

Parameters:

idx - The index of the output among the outputs produced by this operation.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

inputListLength

public int inputListLength(String name)

Returns the size of the given inputs list of Tensors for this operation.

An Operation has multiple named inputs, each of which contains either a single tensor or a list of tensors. This method returns the size of the list of tensors for a specific named input of the operation.

Parameters:

name - identifier of the list of tensors (of which there may be many) inputs to this operation.

Returns:

the size of the list of Tensors produced by this named input.

Throws:

IllegalArgumentException - if this operation has no input with the provided name.