org.expasy.mzjava.utils

Class PrimitiveArrayUtils

java.lang.Object

org.expasy.mzjava.utils.PrimitiveArrayUtils

public final class PrimitiveArrayUtils
extends Object

Provides static generic methods on primitive arrays.

Author:

nikitin

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	arrayEquals(double[] a, double[] a2, int size) Array equals that takes into account the size
static boolean	arrayEquals(float[] a, float[] a2, int size) Array equals that takes into account the size
static int	arrayHashCode(double[] a, int size) Array hash code that takes into account the peak list size
static int	arrayHashCode(float[] a, int size) Array hash code that takes into account the peak list size
static double[]	copyArray(double[] src, int srcPos, double[] dest, int destPos, int length) Wraps System.arrayCopy and creates a new array if required
static double[]	copyArray(float[] src, int srcPos, double[] dest, int destPos, int length) Copies an array from the specified source array, beginning at the specified position, to the specified position of the destination array.
static double[]	grow(double[] arr, int loadFactor) Grow the array arr by loadFactor
static float[]	grow(float[] arr, int loadFactor) Grow the array arr by loadFactor
static int	indexMax(double[] values) Get the index of the maximum value
static void	insert(double value, int index, double[] arr, int size) Insert the value into the array at index.
static void	insert(float value, int index, float[] arr, int size) Insert the value into the array at index.
static double[]	loadDoubles(double[] src, double[] dest) Load doubles from src to dest arrays.
static double[]	loadDoubles(double[] src, double[] dest, int destPos) Load doubles from src to dest arrays.
static Double[]	toDoubles(double[] src, Double[] dest) Convert double array to Double array.
static Double[]	toDoubles(double[] src, Double[] dest, int destPos) Convert double array to Double array.
static double[]	trim(double[] arr, int size) Trim the arr to the size of this DoublePeakList
static float[]	trim(float[] arr, int size) Trim the arr to the size of this DoublePeakList

Methods inherited from class java.lang.Object

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

Method Detail

grow

public static double[] grow(double[] arr,
            int loadFactor)

Grow the array arr by loadFactor

Parameters:

arr - the array to grow

loadFactor - the amount to grow the array

Returns:

the new array

grow

public static float[] grow(float[] arr,
           int loadFactor)

Grow the array arr by loadFactor

Parameters:

arr - the array to grow

loadFactor - the amount to grow the array

Returns:

the new array

insert

public static void insert(double value,
          int index,
          double[] arr,
          int size)

Insert the value into the array at index.

Parameters:

value - the value to insert

index - the index in which the value is to be inserted

arr - the array to insert the value

size - the size of the peak list

insert

public static void insert(float value,
          int index,
          float[] arr,
          int size)

Insert the value into the array at index.

Parameters:

value - the value to insert

index - the index in which the value is to be inserted

arr - the array to insert the value

size - the size of the peak list

copyArray

public static double[] copyArray(double[] src,
                 int srcPos,
                 double[] dest,
                 int destPos,
                 int length)

Wraps System.arrayCopy and creates a new array if required

Parameters:

src - the src array

srcPos - the src position

dest - the dest array

destPos - the dest position

length - the number of elements to copy

Returns:

the dest array or the newly created array

copyArray

public static double[] copyArray(float[] src,
                 int srcPos,
                 double[] dest,
                 int destPos,
                 int length)

Copies an array from the specified source array, beginning at the specified position, to the specified position of the destination array.

Not using System.arrayCopy because the src and dest array are not the same type.

Parameters:

src - the src array

srcPos - the src position

dest - the dest array

destPos - the dest position

length - the number of elements to copy

Returns:

the dest array or the newly created array

trim

public static double[] trim(double[] arr,
            int size)

Trim the arr to the size of this DoublePeakList

Parameters:

arr - the array to trim

Returns:

the array

trim

public static float[] trim(float[] arr,
           int size)

Trim the arr to the size of this DoublePeakList

Parameters:

arr - the array to trim

Returns:

the array

arrayHashCode

public static int arrayHashCode(double[] a,
                int size)

Array hash code that takes into account the peak list size

Parameters:

a - the array

Returns:

the hash code

arrayHashCode

public static int arrayHashCode(float[] a,
                int size)

Array hash code that takes into account the peak list size

Parameters:

a - the array

Returns:

the hash code

arrayEquals

public static boolean arrayEquals(double[] a,
                  double[] a2,
                  int size)

Array equals that takes into account the size

Parameters:

a - the first array

a2 - the second array

Returns:

true if the arrays are equals, false otherwise

arrayEquals

public static boolean arrayEquals(float[] a,
                  float[] a2,
                  int size)

Array equals that takes into account the size

Parameters:

a - the first array

a2 - the second array

Returns:

true if the arrays are equals, false otherwise

loadDoubles

public static double[] loadDoubles(double[] src,
                   double[] dest)

Load doubles from src to dest arrays.

Parameters:

src - the source array to load from.

dest - the destination array to load to.

Returns:

the dest array.

loadDoubles

public static double[] loadDoubles(double[] src,
                   double[] dest,
                   int destPos)

Load doubles from src to dest arrays.

Parameters:

src - the source array to load from.

dest - the destination array to load to.

destPos - starting position in the destination data.

Returns:

the dest array.

toDoubles

public static Double[] toDoubles(double[] src,
                 Double[] dest)

Convert double array to Double array.

Parameters:

src - the source array to load from.

dest - the destination array to load to.

Returns:

the dest array.

toDoubles

public static Double[] toDoubles(double[] src,
                 Double[] dest,
                 int destPos)

Convert double array to Double array.

Parameters:

src - the source array to load from.

dest - the destination array to load to.

destPos - starting position in the destination data.

Returns:

the dest array.

indexMax

public static int indexMax(double[] values)

Get the index of the maximum value

Parameters:

values - the array to search for the max

Returns:

an index or -1 if empty