de.lmu.ifi.dbs.elki.utilities.datastructures.arraylike

Class IntegerArray

java.lang.Object

de.lmu.ifi.dbs.elki.utilities.datastructures.arraylike.IntegerArray

All Implemented Interfaces:

ArrayAdapter<Integer,IntegerArray>, NumberArrayAdapter<Integer,IntegerArray>

public class IntegerArray
extends Object
implements NumberArrayAdapter<Integer,IntegerArray>

Array of int values.

Since:

0.7.0

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
int[]	data (Reused) store for numerical attributes.
private static int	LAST_GROW_SIZE Last value where we can grow by 50%.
private static int	MAX_ARRAY_SIZE Maximum array size permitted by Java.
int	size Number of numerical attributes.

Constructor Summary

Constructors

Constructor and Description
IntegerArray() Constructor.
IntegerArray(int initialsize) Constructor.
IntegerArray(IntegerArray existing) Constructor from an existing array.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(int attribute) Append a value.
void	clear() Reset the numeric attribute counter.
int	get(int pos) Get the value at this position.
Integer	get(IntegerArray array, int off) Get the off'th item from the array.
byte	getByte(IntegerArray array, int off) Get the off'th item from the array as byte.
double	getDouble(IntegerArray array, int off) Get the off'th item from the array as double.
float	getFloat(IntegerArray array, int off) Get the off'th item from the array as float.
int	getInteger(IntegerArray array, int off) Get the off'th item from the array as integer.
long	getLong(IntegerArray array, int off) Get the off'th item from the array as long.
short	getShort(IntegerArray array, int off) Get the off'th item from the array as short.
private void	grow() Grow the current array.
void	insert(int pos, int val) Insert a value at the given position.
void	remove(int start, int len) Remove a range from the array.
void	set(int pos, int value) Set the value at this position.
int	size() Get the size of the array.
int	size(IntegerArray array) Get the size of the array.
void	sort() Sort the contents.
int[]	toArray() Return a copy of the contents as array.

Methods inherited from class java.lang.Object

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

Field Detail

MAX_ARRAY_SIZE

private static final int MAX_ARRAY_SIZE

Maximum array size permitted by Java. This is JVM dependent, but 2^31 - 5 is the usual OpenJDK8 value.

See Also:

Constant Field Values

LAST_GROW_SIZE

private static final int LAST_GROW_SIZE

Last value where we can grow by 50%.

See Also:

Constant Field Values

data

public int[] data

(Reused) store for numerical attributes.

size

public int size

Number of numerical attributes.

Constructor Detail

IntegerArray

public IntegerArray()

Constructor.

IntegerArray

public IntegerArray(int initialsize)

Constructor.

Parameters:

initialsize - Initial size.

IntegerArray

public IntegerArray(IntegerArray existing)

Constructor from an existing array. The new array will be allocated as small as possible, so modifications will cause a resize!

Parameters:

existing - Existing array

Method Detail

clear

public void clear()

Reset the numeric attribute counter.

add

public void add(int attribute)

Append a value.

Parameters:

attribute - Attribute value.

grow

private void grow()
           throws OutOfMemoryError

Grow the current array.

Throws:

OutOfMemoryError

get

public int get(int pos)

Get the value at this position.

Parameters:

pos - Position

Returns:

Value

set

public void set(int pos,
       int value)

Set the value at this position.

Parameters:

pos - Position

value - Value

remove

public void remove(int start,
          int len)

Remove a range from the array.

Parameters:

start - Start

len - Length

insert

public void insert(int pos,
          int val)

Insert a value at the given position.

Parameters:

pos - Insert position

val - Value to insert

size

public int size()

Get the size of the array.

Returns:

Size

sort

public void sort()

Sort the contents.

size

public int size(IntegerArray array)

Description copied from interface: ArrayAdapter

Get the size of the array.

Specified by:

size in interface ArrayAdapter<Integer,IntegerArray>

Specified by:

size in interface NumberArrayAdapter<Integer,IntegerArray>

Parameters:

array - Array-like thing

Returns:

Size

get

public Integer get(IntegerArray array,
          int off)
            throws IndexOutOfBoundsException

Description copied from interface: ArrayAdapter

Get the off'th item from the array.

Specified by:

get in interface ArrayAdapter<Integer,IntegerArray>

Specified by:

get in interface NumberArrayAdapter<Integer,IntegerArray>

Parameters:

array - Array to get from

off - Offset

Returns:

Item at offset off

Throws:

IndexOutOfBoundsException - for an invalid index.

getDouble

public double getDouble(IntegerArray array,
               int off)
                 throws IndexOutOfBoundsException

Description copied from interface: NumberArrayAdapter

Get the off'th item from the array as double.

Specified by:

getDouble in interface NumberArrayAdapter<Integer,IntegerArray>

Parameters:

array - Array to get from

off - Offset

Returns:

Item at offset off

Throws:

IndexOutOfBoundsException - for an invalid index.

getFloat

public float getFloat(IntegerArray array,
             int off)
               throws IndexOutOfBoundsException

Description copied from interface: NumberArrayAdapter

Get the off'th item from the array as float.

Specified by:

getFloat in interface NumberArrayAdapter<Integer,IntegerArray>

Parameters:

array - Array to get from

off - Offset

Returns:

Item at offset off

Throws:

IndexOutOfBoundsException - for an invalid index.

getInteger

public int getInteger(IntegerArray array,
             int off)
               throws IndexOutOfBoundsException

Description copied from interface: NumberArrayAdapter

Get the off'th item from the array as integer.

Specified by:

getInteger in interface NumberArrayAdapter<Integer,IntegerArray>

Parameters:

array - Array to get from

off - Offset

Returns:

Item at offset off

Throws:

IndexOutOfBoundsException - for an invalid index.

getShort

public short getShort(IntegerArray array,
             int off)
               throws IndexOutOfBoundsException

Description copied from interface: NumberArrayAdapter

Get the off'th item from the array as short.

Specified by:

getShort in interface NumberArrayAdapter<Integer,IntegerArray>

Parameters:

array - Array to get from

off - Offset

Returns:

Item at offset off

Throws:

IndexOutOfBoundsException - for an invalid index.

getLong

public long getLong(IntegerArray array,
           int off)
             throws IndexOutOfBoundsException

Description copied from interface: NumberArrayAdapter

Get the off'th item from the array as long.

Specified by:

getLong in interface NumberArrayAdapter<Integer,IntegerArray>

Parameters:

array - Array to get from

off - Offset

Returns:

Item at offset off

Throws:

IndexOutOfBoundsException - for an invalid index.

getByte

public byte getByte(IntegerArray array,
           int off)
             throws IndexOutOfBoundsException

Description copied from interface: NumberArrayAdapter

Get the off'th item from the array as byte.

Specified by:

getByte in interface NumberArrayAdapter<Integer,IntegerArray>

Parameters:

array - Array to get from

off - Offset

Returns:

Item at offset off

Throws:

IndexOutOfBoundsException - for an invalid index.

toArray

public int[] toArray()

Return a copy of the contents as array.

Returns:

Copy of the contents.