goodslib
Class ArrayOfDouble

java.lang.Object
  extended bygoodsjpi.Persistent
      extended bygoodslib.AnyArray
          extended bygoodslib.ArrayOfDouble
All Implemented Interfaces:
java.io.Serializable

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.

See Also:
Serialized Form

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, onLoad
 
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