goodslib
Class ArrayOfFloat

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

public class ArrayOfFloat

extends AnyArray

ArrayOfFloat is just that, an array of floats. 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 float[]

array array holds the floats in an []

Fields inherited from class goodslib.AnyArray

used

Fields inherited from class goodsjpi.Persistent

defaultMetaobject, metaobject

Constructor Summary

ArrayOfFloat(float[] src)
Creates a new ArrayOfFloat instance, as a copy of the given float[]

ArrayOfFloat(int size)
Creates a new ArrayOfFloat instance.

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

Method Summary

void	append(float[] 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, float[] src, int srcIndex, int count) copy into this array from a destination, a given amount of values.
float	getAt(int index) Get a float at the specified index
int	indexOf(float val) indexOf returns the first occurrence of val
void	insert(int index, int count, float value) insert a "count" amount of values at a given index.
int	lastIndexOf(float val) Find the lastIndexOf a given value
float	pop() Use the array as a stack and pop a value.
void	push(float value) Use the array as a stack with the push method.
void	putAt(int index, float value) Put a float value at a given index
void	remove(int index, int count) remove a number of values.
float[]	toArray() toArray converts the internal representation to a float[] , of correct size.
float	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 float[] array

array holds the floats in an []

Constructor Detail

ArrayOfFloat

public ArrayOfFloat(int size)

Creates a new ArrayOfFloat instance.

Parameters:

size - is the initial size, (length)

ArrayOfFloat

public ArrayOfFloat(int size,
                    int allocatedSize)

Creates a new ArrayOfFloat instance. (Full of false)

Parameters:

size - , or length of the array

allocatedSize - is the size it can grow to without re-sizing

ArrayOfFloat

public ArrayOfFloat(float[] src)

Creates a new ArrayOfFloat instance, as a copy of the given float[]

Parameters:

src - a float[] that will be copied

Method Detail

putAt

public void putAt(int index,
                  float value)

Put a float value at a given index

Parameters:

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

value - the float value to be set

getAt

public float getAt(int index)

Get a float at the specified index

Parameters:

index - of the float you want

Returns:

a float 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,
                   float 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 float 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(float value)

Use the array as a stack with the push method.

Parameters:

value - , a float to push to the stack

pop

public float 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 float value

top

public float 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 float value

append

public void append(float[] tail)

append add the given values to the end of the array

Parameters:

tail - a float[] that will be appended

toArray

public float[] toArray()

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

Returns:

a float[] value

copy

public void copy(int dstIndex,
                 float[] 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 float[] , where to copy from

srcIndex - an int , where to start copying from

count - an int , how many values to copy

indexOf

public int indexOf(float val)

indexOf returns the first occurrence of val

Parameters:

val - a float to be looked for

Returns:

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

lastIndexOf

public int lastIndexOf(float val)

Find the lastIndexOf a given value

Parameters:

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

Returns:

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