android.text
Class PackedIntVector

java.lang.Object
  android.text.PackedIntVector

 class PackedIntVector
extends Object

PackedIntVector stores a two-dimensional array of integers, optimized for inserting and deleting rows and for offsetting the values in segments of a given column.

Constructor Summary

PackedIntVector(int columns)
Creates a new PackedIntVector with the specified width and a height of 0.

Method Summary

void	adjustValuesBelow(int startRow, int column, int delta) Increments all values in the specified column whose row >= the specified row by the specified delta.
void	deleteAt(int row, int count) Deletes the specified number of rows starting with the specified row.
int	getValue(int row, int column) Returns the value at the specified row and column.
void	insertAt(int row, int[] values) Inserts a new row of values at the specified row offset.
void	setValue(int row, int column, int value) Sets the value at the specified row and column.
int	size() Returns the number of rows in the PackedIntVector.
int	width() Returns the width of the PackedIntVector.

Methods inherited from class java.lang.Object

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

Constructor Detail

PackedIntVector

public PackedIntVector(int columns)

Creates a new PackedIntVector with the specified width and a height of 0.

Parameters:

columns - the width of the PackedIntVector.

Method Detail

getValue

public int getValue(int row,
                    int column)

Returns the value at the specified row and column.

Parameters:

row - the index of the row to return.

column - the index of the column to return.

Returns:

the value stored at the specified position.

Throws:

IndexOutOfBoundsException - if the row is out of range (row < 0 || row >= size()) or the column is out of range (column < 0 || column >= width()).

setValue

public void setValue(int row,
                     int column,
                     int value)

Sets the value at the specified row and column.

Parameters:

row - the index of the row to set.

column - the index of the column to set.

Throws:

IndexOutOfBoundsException - if the row is out of range (row < 0 || row >= size()) or the column is out of range (column < 0 || column >= width()).

adjustValuesBelow

public void adjustValuesBelow(int startRow,
                              int column,
                              int delta)

Increments all values in the specified column whose row >= the specified row by the specified delta.

Parameters:

startRow - the row at which to begin incrementing. This may be == size(), which case there is no effect.

column - the index of the column to set.

Throws:

IndexOutOfBoundsException - if the row is out of range (startRow < 0 || startRow > size()) or the column is out of range (column < 0 || column >= width()).

insertAt

public void insertAt(int row,
                     int[] values)

Inserts a new row of values at the specified row offset.

Parameters:

row - the row above which to insert the new row. This may be == size(), which case the new row is added at the end.

values - the new values to be added. If this is null, a row of zeroes is added.

Throws:

IndexOutOfBoundsException - if the row is out of range (row < 0 || row > size()) or if the length of the values array is too small (values.length < width()).

deleteAt

public void deleteAt(int row,
                     int count)

Deletes the specified number of rows starting with the specified row.

Parameters:

row - the index of the first row to be deleted.

count - the number of rows to delete.

Throws:

IndexOutOfBoundsException - if any of the rows to be deleted are out of range (row < 0 || count < 0 || row + count > size()).

size

public int size()

Returns the number of rows in the PackedIntVector. This number will change as rows are inserted and deleted.

Returns:

the number of rows.

width

public int width()

Returns the width of the PackedIntVector. This number is set at construction and will not change.

Returns:

the number of columns.