goodslib
Class ArrayOfDouble

java.lang.Object
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  +--goodsjpi.Persistent
        |
        +--goodslib.AnyArray
              |
              +--goodslib.ArrayOfDouble

public class ArrayOfDouble

extends AnyArray

ArrayOfDouble is just that, an array of doubles. It is fully persistent, as it it's derived from Persistent. All reads cause a fetch of the data, all writes mark it dirty and to be saved.

Field Summary

protected double[]

array array holds the doubles in an []

Fields inherited from class goodslib.AnyArray

used

Fields inherited from class goodsjpi.Persistent

defaultMetaobject, metaobject

Constructor Summary

ArrayOfDouble(double[] src)
Creates a new ArrayOfDouble instance, as a copy of the given double[]

ArrayOfDouble(int size)
Creates a new ArrayOfDouble instance.

ArrayOfDouble(int size, int allocatedSize)
Creates a new ArrayOfDouble instance.

Method Summary

void	append(double[] tail) append add the given values to the end of the array
void	changeSize(int newSize) Resize the amount of space taken by the array.
void	copy(int dstIndex, double[] src, int srcIndex, int count) copy into this array from a destination, a given amount of values.
double	getAt(int index) Get a double at the specified index
int	indexOf(double val) indexOf returns the first occurrence of val
void	insert(int index, int count, double value) insert a "count" amount of values at a given index.
int	lastIndexOf(double val) Find the lastIndexOf a given value
double	pop() Use the array as a stack and pop a value.
void	push(double value) Use the array as a stack with the push method.
void	putAt(int index, double value) Put a double value at a given index
void	remove(int index, int count) remove a number of values.
double[]	toArray() toArray converts the internal representation to a double[] , of correct size.
double	top() Check the top boolean with the top method.

Methods inherited from class goodslib.AnyArray

length

Methods inherited from class goodsjpi.Persistent

attachToStorage, clone, clusterWith, finalize, getDatabase, getOid, getStorageId, hashCode

Methods inherited from class java.lang.Object

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

Field Detail

array

protected double[] array

array holds the doubles in an []

Constructor Detail

ArrayOfDouble

public ArrayOfDouble(int size)

Creates a new ArrayOfDouble instance.

Parameters:

size - is the initial size, (length)

ArrayOfDouble

public ArrayOfDouble(int size,
                     int allocatedSize)

Creates a new ArrayOfDouble instance. (Full of false)

Parameters:

size - , or length of the array

allocatedSize - is the size it can grow to without resizing

ArrayOfDouble

public ArrayOfDouble(double[] src)

Creates a new ArrayOfDouble instance, as a copy of the given double[]

Parameters:

src - a double[] that will be copied

Method Detail

putAt

public void putAt(int index,
                  double value)

Put a double value at a given index

Parameters:

index - an int value, where the value should be set

value - the double value to be set

getAt

public double getAt(int index)

Get a double at the specified index

Parameters:

index - of the double you want

Returns:

a double value, at index "index"

changeSize

public void changeSize(int newSize)

Resize the amount of space taken by the array. Either grow or shrink as necessary. You get an IndexOutOfBoundException for negative values.
of course the old data is copied.

Parameters:

newSize - an int denoting the new size.

insert

public void insert(int index,
                   int count,
                   double value)

insert a "count" amount of values at a given index. Throws an IndexOutOfBoundsException for too small (<0) or too big (>length) count or index.

Parameters:

index - , where to start inserting value(s)

count - , how many values to insert

value - a double value to insert

remove

public void remove(int index,
                   int count)

remove a number of values. The array shrinks in it's length, but no resizing is done. Get an IndexOutOfBoundsException for inappropriate index or count values.

Parameters:

index - , where to start removing

count - , how many values to remove

push

public void push(double value)

Use the array as a stack with the push method.

Parameters:

value - , a double to push to the stack

pop

public double pop()

Use the array as a stack and pop a value. (Value is removed) IndexOutOfBoundsExceptions comes when array has hit 0 length.

Returns:

the top most double value

top

public double top()

Check the top boolean with the top method. This returns what pop returns, just it doesn't remove the value. In other stack implementations it may be called peek()

Returns:

a double value

append

public void append(double[] tail)

append add the given values to the end of the array

Parameters:

tail - a double[] that will be appended

toArray

public double[] toArray()

toArray converts the internal representation to a double[] , of correct size. Ie: the .length of the return == this.size()

Returns:

a double[] value

copy

public void copy(int dstIndex,
                 double[] src,
                 int srcIndex,
                 int count)

copy into this array from a destination, a given amount of values. Get a IndexOutOfBounds if the src or count don't fit

Parameters:

dstIndex - , the index (of this array) where to copy to

src - a double[] , where to copy from

srcIndex - an int , where to start copying from

count - an int , how many values to copy

indexOf

public int indexOf(double val)

indexOf returns the first occurrence of val

Parameters:

val - a double to be looked for

Returns:

an int, where the value was found, or -1

lastIndexOf

public int lastIndexOf(double val)

Find the lastIndexOf a given value

Parameters:

val - a double value to be found (from the back)

Returns:

an int , where the value was found, or -1