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Operation

public interface Operation
Known Indirect Subclasses

Performs computation on Tensors.

An Operation takes zero or more Tensors (produced by other Operations) as input, and produces zero or more Tensors as output.

Public Methods

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

Public Methods

public abstract 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.

public abstract String name ()

Returns the full name of the Operation.

public abstract int numOutputs ()

Returns the number of tensors produced by this operation.

public abstract 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)

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

public abstract 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

public abstract 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.

public abstract String type ()

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