cc.redberry.core.tensor

Class Expression

java.lang.Object

cc.redberry.core.tensor.Tensor

cc.redberry.core.tensor.Expression

All Implemented Interfaces:

Transformation, Comparable<Tensor>, Iterable<Tensor>

public class Expression
extends Tensor
implements Transformation

Representation of mathematical expression A = B. Expression also implements Transformation and represents substitutions.

Since:

1.0

Author:

Dmitry Bolotin, Stanislav Poslavsky

See Also:

ExpressionBuilder, ExpressionFactory

Nested Class Summary

Nested classes/interfaces inherited from interface cc.redberry.core.transformations.Transformation

Transformation.Util

Field Summary

Fields inherited from interface cc.redberry.core.transformations.Transformation

INDENTITY

Method Summary

Methods

Modifier and Type	Method and Description
Tensor	get(int i) Returns element at i-th position.
TensorBuilder	getBuilder() Creates a builder for this tensor.
TensorFactory	getFactory() Returns a factory for this tensor.
Indices	getIndices() Returns indices of this tensor.
protected int	hash() Hash code of this tensor.
boolean	isIdentity() Returns true if r.h.s.
int	size() Returns the number of elements in this tensor.
String	toString(OutputFormat mode) Returns a string representation of a tensor according to the specified OutputFormat.
Tensor	transform(Tensor t) Transforms specified tensor and returns the result.
Expression	transpose() Swaps l.h.s.

Methods inherited from class cc.redberry.core.tensor.Tensor

compareTo, getRange, hashCode, iterator, set, toArray, toString, toString

Methods inherited from class java.lang.Object

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

Method Detail

get

public Tensor get(int i)

Description copied from class: Tensor

Returns element at i-th position.

Specified by:

get in class Tensor

Parameters:

i - position

Returns:

element at i-th position

getIndices

public Indices getIndices()

Description copied from class: Tensor

Returns indices of this tensor.

Specified by:

getIndices in class Tensor

Returns:

indices of this tensor

hash

protected int hash()

Description copied from class: Tensor

Hash code of this tensor.

Specified by:

hash in class Tensor

Returns:

hash code of this tensor

size

public int size()

Description copied from class: Tensor

Returns the number of elements in this tensor.

Specified by:

size in class Tensor

Returns:

the number of elements in this tensor

toString

public String toString(OutputFormat mode)

Description copied from class: Tensor

Returns a string representation of a tensor according to the specified OutputFormat.

Specified by:

toString in class Tensor

Parameters:

mode - output format

Returns:

a string representation of a tensor

getBuilder

public TensorBuilder getBuilder()

Description copied from class: Tensor

Creates a builder for this tensor. See TensorBuilder for more information.

Specified by:

getBuilder in class Tensor

Returns:

builder for this tensor

getFactory

public TensorFactory getFactory()

Description copied from class: Tensor

Returns a factory for this tensor. See TensorFactory for more information.

Specified by:

getFactory in class Tensor

Returns:

builder for this tensor

transform

public Tensor transform(Tensor t)

Description copied from interface: Transformation

Transforms specified tensor and returns the result.

Specified by:

transform in interface Transformation

Parameters:

t - tensor

Returns:

transformed tensor

isIdentity

public boolean isIdentity()

Returns true if r.h.s. is equal to l.h.s.

Returns:

true if r.h.s. is equal to l.h.s.

transpose

public Expression transpose()

Swaps l.h.s. and r.h.s. of expression.

Returns:

swapped expression