"

 COPYRIGHT (c) 1989-92 by Claus Gittinger

              All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

SequenceableCollection subclass:#ArrayedCollection

       instanceVariableNames:''

       classVariableNames:''

       poolDictionaries:''

       category:'Collections-Abstract'

!

ArrayedCollection comment:'

COPYRIGHT (c) 1989-92 by Claus Gittinger

             All Rights Reserved

ArrayedCollections are collections where the elements can be accessed via an integer index.

written spring 89 by claus

'!

!ArrayedCollection class methodsFor:'instance creation'!

with:element

    "return a new SequenceableCollection with one element:anObject"

    |newCollection|

    newCollection := self new:1.

    newCollection at:1 put:element.

    ^newCollection

!

with:first with:second

    "return a new SequenceableCollection with two elements"

    |newCollection|

    newCollection := self new:2.

    newCollection at:1 put:first.

    newCollection at:2 put:second.

    ^newCollection

!

with:first with:second with:third

    "return a new SequenceableCollection with three elements"

    |newCollection|

    newCollection := self new:3.

    newCollection at:1 put:first.

    newCollection at:2 put:second.

    newCollection at:3 put:third.

    ^newCollection

!

with:first with:second with:third with:forth

    "return a new SequenceableCollection with four elements"

    |newCollection|

    newCollection := self new:4.

    newCollection at:1 put:first.

    newCollection at:2 put:second.

    newCollection at:3 put:third.

    newCollection at:4 put:forth.

    ^newCollection

!

with:one with:two with:three with:four with:five

    "return a new SequenceableCollection with five elements"

    |newCollection|

    newCollection := self new:5.

    newCollection at:1 put:one.

    newCollection at:2 put:two.

    newCollection at:3 put:three.

    newCollection at:4 put:four.

    newCollection at:5 put:five.

    ^newCollection

!

withAll:aCollection

    "return a new Collection with all elements taken from the argument,

     aCollection"

    |newCollection newSize

     index "{ Class: SmallInteger }" |

    newSize := aCollection size.

    newCollection := self new:newSize.

    (aCollection isKindOf:SequenceableCollection) ifTrue:[

        "aCollection has indexed elements"

        newCollection replaceFrom:1 to:newSize with:aCollection startingAt:1

    ] ifFalse:[

        "must enumerate the elements"

        index := 1.

        aCollection do:[:element |

            newCollection at:index put:element.

            index := index + 1

        ]

    ].

    ^ newCollection

! !

!ArrayedCollection methodsFor:'testing'!

size

    "redefined to re-enable size->basicSize forwarding

     (it is cought in SequencableCollection)"

    ^ self basicSize

! !

!ArrayedCollection methodsFor:'resizing'!

grow:newSize

    "grow the receiver - this may be a slow operation due to

     the use of become - you should write your collection

     classes to avoid the use of become - be warned"

    |newArray|

    (newSize ~~ self size) ifTrue:[

        newArray := self species new:newSize.

        newArray replaceFrom:1 to:newSize with:self.

        self become:newArray.

    ]

! !

!ArrayedCollection methodsFor:'error handling'!

fixedSizeError

    "report an error that size of the collection cannot be changed"

    ^ self error:'cannot change size'

! !

!ArrayedCollection methodsFor:'storing'!

storeOn:aStream

    "output a printed representation (which can be re-read)

     onto the argument aStream"

    |index "{ Class: SmallInteger }"|

    aStream nextPutAll:'('.

    aStream nextPutAll:self class name.

    aStream nextPutAll:' new:'.

    self size printOn:aStream.

    aStream nextPutAll:')'.

    index := 1.

    self do:[:element |

        aStream nextPutAll:' at:'.

        index printOn:aStream.

        aStream nextPutAll:' put:('.

        element storeOn:aStream.

        aStream nextPutAll:');'.

        index := index + 1

    ].

    index > 1 ifTrue:[aStream nextPutAll:' yourself'].

    aStream nextPut:$)

! !