cc.redberry.core.tensor

Class ProductContent

java.lang.Object

cc.redberry.core.tensor.ProductContent

All Implemented Interfaces:

java.lang.Iterable<Tensor>

public final class ProductContent
extends java.lang.Object
implements java.lang.Iterable<Tensor>

This class is a container of information about graph structure of product.

Since:

1.0

Field Summary

Fields

Modifier and Type	Field and Description
static ProductContent	EMPTY_INSTANCE Singleton for empty instance.

Method Summary

Modifier and Type	Method and Description
Tensor	get(int i) Returns i-th element of indexed data in this product.
Tensor[]	getDataCopy() Copy of indexed data array
Tensor	getNonScalar() Returns non-scalar connected component of product.
Tensor[]	getRange(int from, int to) Returns a range of indexed data specified by from and to.
Tensor[]	getScalars() Return scalar subproducts of this product.
short	getStretchId(int i)
short[]	getStretchIds()
short	getStretchIndexByHash(int hashCode)
StructureOfContractions	getStructureOfContractions() Returns structure of product contractions.
StructureOfContractionsHashed	getStructureOfContractionsHashed() Returns hashed structure of product contractions.
java.util.Iterator<Tensor>	iterator()
int	size() Returns size of indexed data.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

EMPTY_INSTANCE

public static final ProductContent EMPTY_INSTANCE

Singleton for empty instance.

Method Detail

getStructureOfContractionsHashed

public StructureOfContractionsHashed getStructureOfContractionsHashed()

Returns hashed structure of product contractions.

Returns:

hashed structure of product contractions

getStructureOfContractions

public StructureOfContractions getStructureOfContractions()

Returns structure of product contractions.

Returns:

structure of product contractions

getNonScalar

public Tensor getNonScalar()

Returns non-scalar connected component of product.

Returns:

non-scalar connected component of product

getScalars

public Tensor[] getScalars()

Return scalar subproducts of this product.

Returns:

an array of scalar subproducts of this product

getStretchIds

public short[] getStretchIds()

Returns:

ids

getStretchId

public short getStretchId(int i)

Parameters:

i - position

Returns:

id

get

public Tensor get(int i)

Returns i-th element of indexed data in this product.

Parameters:

i - position

Returns:

i-th element of indexed data in this product

size

public int size()

Returns size of indexed data.

Returns:

size of indexed data

getRange

public Tensor[] getRange(int from,
                         int to)

Returns a range of indexed data specified by from and to.

Parameters:

from - from position (inclusive)

to - to position (exclusive)

Returns:

range

getDataCopy

public Tensor[] getDataCopy()

Copy of indexed data array

Returns:

copy of indexed data array

iterator

public java.util.Iterator<Tensor> iterator()

Specified by:

iterator in interface java.lang.Iterable<Tensor>

getStretchIndexByHash

public short getStretchIndexByHash(int hashCode)

Parameters:

hashCode - hashCode

Returns:

id