"

 COPYRIGHT (c) 1994 by Claus Gittinger

 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.

"

Magnitude subclass:#LookupKey

       instanceVariableNames:'key'

       classVariableNames:''

       poolDictionaries:''

       category:'Collections-Support'

!

LookupKey comment:'

COPYRIGHT (c) 1994 by Claus Gittinger

'!

!LookupKey class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1994 by Claus Gittinger

 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.

"

!

version

"

"

!

documentation

"

    LookupKey has been extracted from Association for ST-80 compatibility.

    They are currently not used directly.

    Instance variables:

"

! !

!LookupKey class methodsFor:'instance creation'!

key:aKey

    "return a new instance."

    ^ self basicNew key:aKey

! !

!LookupKey methodsFor:'accessing'!

key

    "return the key of the receiver"

    ^ key

!

key:anObject

    "set the key of the receiver to be anObject.

     Return the receiver"

    key := anObject

! !

!LookupKey methodsFor:'comparing'!

= aLookupKey

    "return true if the receiver equals the argument.

     Notice, that in contrast to the less/greater compares,

     this compares both key AND value."

    ^ (self species == aLookupKey species) and:[key = aLookupKey key]

!

hash

    "return an integer useful for hashing on the receiver;

     redefined since = is redefined here."

    ^ key hash

!

< aKey

    "return true, if the receivers KEY is less 

     than the arguments key. The argument must be a kind of lookupKey"

    ^ key < aKey key

!

> aKey

    "return true, if the receivers KEY is greater 

     than the arguments key. The argument must be a kind of lookupKey"

    ^ key > aKey key

! !

!LookupKey methodsFor:'printing & storing'!

printOn:aStream

    "return a string containing a printable representation

     of the receiver"

    key printOn:aStream.

!

displayString

    "return a string containing a printable representation

     of the receiver for displaying - redefined to use display string on

     the components for nicer look"

    ^ self class name , '(' , key displayString , ')'

! !