cern.colt.matrix.impl

Class AbstractMatrix2D

java.lang.Object

cern.colt.PersistentObject

cern.colt.matrix.impl.AbstractMatrix

cern.colt.matrix.impl.AbstractMatrix2D

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

DoubleMatrix2D, ObjectMatrix2D

public abstract class AbstractMatrix2D
extends AbstractMatrix

Abstract base class for 2-d matrices holding objects or primitive data types such as int, double, etc. First see the package summary and javadoc tree view to get the broad picture.

Note that this implementation is not synchronized.

Version:

1.0, 09/24/99

Author:

wolfgang.hoschek@cern.ch

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected int	columns the number of colums and rows this matrix (view) has
protected int	columnStride the number of elements between two columns, i.e.
protected int	columnZero the index of the first element
protected int	rows the number of colums and rows this matrix (view) has
protected int	rowStride the number of elements between two rows, i.e.
protected int	rowZero the index of the first element

Fields inherited from class cern.colt.matrix.impl.AbstractMatrix

isNoView

Fields inherited from class cern.colt.PersistentObject

serialVersionUID

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractMatrix2D() Makes this class non instantiable, but still let's others inherit from it.

Method Summary

Methods

Modifier and Type	Method and Description
protected int	_columnOffset(int absRank) Returns the position of the given absolute rank within the (virtual or non-virtual) internal 1-dimensional array.
protected int	_columnRank(int rank) Returns the absolute rank of the given relative rank.
protected int	_rowOffset(int absRank) Returns the position of the given absolute rank within the (virtual or non-virtual) internal 1-dimensional array.
protected int	_rowRank(int rank) Returns the absolute rank of the given relative rank.
protected void	checkBox(int row, int column, int height, int width) Checks whether the receiver contains the given box and throws an exception, if necessary.
protected void	checkColumn(int column) Sanity check for operations requiring a column index to be within bounds.
protected void	checkColumnIndexes(int[] indexes) Checks whether indexes are legal and throws an exception, if necessary.
protected void	checkRow(int row) Sanity check for operations requiring a row index to be within bounds.
protected void	checkRowIndexes(int[] indexes) Checks whether indexes are legal and throws an exception, if necessary.
void	checkShape(AbstractMatrix2D B) Sanity check for operations requiring two matrices with the same number of columns and rows.
void	checkShape(AbstractMatrix2D B, AbstractMatrix2D C) Sanity check for operations requiring matrices with the same number of columns and rows.
int	columns() Returns the number of columns.
protected int	index(int row, int column) Returns the position of the given coordinate within the (virtual or non-virtual) internal 1-dimensional array.
int	rows() Returns the number of rows.
protected void	setUp(int rows, int columns) Sets up a matrix with a given number of rows and columns.
protected void	setUp(int rows, int columns, int rowZero, int columnZero, int rowStride, int columnStride) Sets up a matrix with a given number of rows and columns and the given strides.
int	size() Returns the number of cells which is rows()*columns().
String	toStringShort() Returns a string representation of the receiver's shape.
protected AbstractMatrix2D	vColumnFlip() Self modifying version of viewColumnFlip().
protected AbstractMatrix2D	vDice() Self modifying version of viewDice().
protected AbstractMatrix2D	vPart(int row, int column, int height, int width) Self modifying version of viewPart().
protected AbstractMatrix2D	vRowFlip() Self modifying version of viewRowFlip().
protected AbstractMatrix2D	vStrides(int rowStride, int columnStride) Self modifying version of viewStrides().

Methods inherited from class cern.colt.matrix.impl.AbstractMatrix

ensureCapacity, isView, trimToSize

Methods inherited from class cern.colt.PersistentObject

clone

Methods inherited from class java.lang.Object

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

Field Detail

columns

protected int columns

the number of colums and rows this matrix (view) has

rows

protected int rows

the number of colums and rows this matrix (view) has

rowStride

protected int rowStride

the number of elements between two rows, i.e. index(i+1,j,k) - index(i,j,k).

columnStride

protected int columnStride

the number of elements between two columns, i.e. index(i,j+1,k) - index(i,j,k).

rowZero

protected int rowZero

the index of the first element

columnZero

protected int columnZero

the index of the first element

Constructor Detail

AbstractMatrix2D

protected AbstractMatrix2D()

Makes this class non instantiable, but still let's others inherit from it.

Method Detail

_columnOffset

protected int _columnOffset(int absRank)

Returns the position of the given absolute rank within the (virtual or non-virtual) internal 1-dimensional array. Default implementation. Override, if necessary.

Parameters:

rank - the absolute rank of the element.

Returns:

the position.

_columnRank

protected int _columnRank(int rank)

Returns the absolute rank of the given relative rank.

Parameters:

rank - the relative rank of the element.

Returns:

the absolute rank of the element.

_rowOffset

protected int _rowOffset(int absRank)

Returns the position of the given absolute rank within the (virtual or non-virtual) internal 1-dimensional array. Default implementation. Override, if necessary.

Parameters:

rank - the absolute rank of the element.

Returns:

the position.

_rowRank

protected int _rowRank(int rank)

Returns the absolute rank of the given relative rank.

Parameters:

rank - the relative rank of the element.

Returns:

the absolute rank of the element.

checkBox

protected void checkBox(int row,
            int column,
            int height,
            int width)

Checks whether the receiver contains the given box and throws an exception, if necessary.

Throws:

IndexOutOfBoundsException - if column<0 || width<0 || column+width>columns() || row<0 || height<0 || row+height>rows()

checkColumn

protected void checkColumn(int column)

Sanity check for operations requiring a column index to be within bounds.

Throws:

IndexOutOfBoundsException - if column < 0 || column >= columns().

checkColumnIndexes

protected void checkColumnIndexes(int[] indexes)

Checks whether indexes are legal and throws an exception, if necessary.

Throws:

IndexOutOfBoundsException - if ! (0 <= indexes[i] < columns()) for any i=0..indexes.length()-1.

checkRow

protected void checkRow(int row)

Sanity check for operations requiring a row index to be within bounds.

Throws:

IndexOutOfBoundsException - if row < 0 || row >= rows().

checkRowIndexes

protected void checkRowIndexes(int[] indexes)

Checks whether indexes are legal and throws an exception, if necessary.

Throws:

IndexOutOfBoundsException - if ! (0 <= indexes[i] < rows()) for any i=0..indexes.length()-1.

checkShape

public void checkShape(AbstractMatrix2D B)

Sanity check for operations requiring two matrices with the same number of columns and rows.

Throws:

IllegalArgumentException - if columns() != B.columns() || rows() != B.rows().

checkShape

public void checkShape(AbstractMatrix2D B,
              AbstractMatrix2D C)

Sanity check for operations requiring matrices with the same number of columns and rows.

Throws:

IllegalArgumentException - if columns() != B.columns() || rows() != B.rows() || columns() != C.columns() || rows() != C.rows().

columns

public int columns()

Returns the number of columns.

index

protected int index(int row,
        int column)

Returns the position of the given coordinate within the (virtual or non-virtual) internal 1-dimensional array.

Parameters:

row - the index of the row-coordinate.

column - the index of the column-coordinate.

rows

public int rows()

Returns the number of rows.

setUp

protected void setUp(int rows,
         int columns)

Sets up a matrix with a given number of rows and columns.

Parameters:

rows - the number of rows the matrix shall have.

columns - the number of columns the matrix shall have.

Throws:

IllegalArgumentException - if rows<0 || columns<0 || (double)columns*rows > Integer.MAX_VALUE.

setUp

protected void setUp(int rows,
         int columns,
         int rowZero,
         int columnZero,
         int rowStride,
         int columnStride)

Sets up a matrix with a given number of rows and columns and the given strides.

Parameters:

rows - the number of rows the matrix shall have.

columns - the number of columns the matrix shall have.

rowZero - the position of the first element.

columnZero - the position of the first element.

rowStride - the number of elements between two rows, i.e. index(i+1,j)-index(i,j).

columnStride - the number of elements between two columns, i.e. index(i,j+1)-index(i,j).

Throws:

IllegalArgumentException - if rows<0 || columns<0 || (double)columns*rows > Integer.MAX_VALUE or flip's are illegal.

size

public int size()

Returns the number of cells which is rows()*columns().

Specified by:

size in class AbstractMatrix

toStringShort

public String toStringShort()

Returns a string representation of the receiver's shape.

vColumnFlip

protected AbstractMatrix2D vColumnFlip()

Self modifying version of viewColumnFlip().

vDice

protected AbstractMatrix2D vDice()

Self modifying version of viewDice().

vPart

protected AbstractMatrix2D vPart(int row,
                     int column,
                     int height,
                     int width)

Self modifying version of viewPart().

Throws:

IndexOutOfBoundsException - if column<0 || width<0 || column+width>columns() || row<0 || height<0 || row+height>rows()

vRowFlip

protected AbstractMatrix2D vRowFlip()

Self modifying version of viewRowFlip().

vStrides

protected AbstractMatrix2D vStrides(int rowStride,
                        int columnStride)

Self modifying version of viewStrides().

Throws:

IndexOutOfBoundsException - if rowStride<=0 || columnStride<=0.