RWSequenceable Class Reference

Abstract base class for collections that can be accessed by an index. More...

#include <rw/seqcltn.h>

Inheritance diagram for RWSequenceable:

Public Member Functions
virtual RWCollectable *	append (RWCollectable *a)=0
virtual void	apply (RWapplyCollectable, void *)=0
virtual const RWCollectable *	at (size_t i) const =0
virtual RWCollectable *&	at (size_t i)=0
virtual void	clear ()=0
virtual size_t	entries () const =0
virtual RWCollectable *	find (const RWCollectable *) const =0
virtual RWCollectable *	first () const =0
virtual size_t	index (const RWCollectable *c) const =0
virtual RWCollectable *	insert (RWCollectable *)=0
virtual RWCollectable *	insertAt (size_t indx, RWCollectable *e)=0
virtual bool	isEmpty () const =0
virtual RWCollectable *	last () const =0
virtual size_t	occurrencesOf (const RWCollectable *) const =0
virtual RWCollectable *	prepend (RWCollectable *c)=0
virtual RWCollectable *	remove (const RWCollectable *)=0
Public Member Functions inherited from RWCollection
virtual	~RWCollection ()
RWBag	asBag () const
RWBinaryTree	asBinaryTree () const
RWOrdered	asOrderedCollection () const
RWSet	asSet () const
RWBinaryTree	asSortedCollection () const
virtual RWspace	binaryStoreSize () const
virtual void	clearAndDestroy ()
virtual bool	contains (const RWCollectable *target) const
virtual RWClassID	isA () const
virtual RWConstIterator *	newConstIterator () const =0
virtual RWIterator *	newIterator ()=0
void	operator+= (const RWCollection &c)
void	operator-= (const RWCollection &c)
virtual void	removeAndDestroy (const RWCollectable *target)
virtual void	restoreGuts (RWFile &)
virtual void	restoreGuts (RWvistream &)
virtual void	saveGuts (RWFile &) const
virtual void	saveGuts (RWvostream &) const
RWCollection *	select (RWtestCollectable tst, void *vp) const
Public Member Functions inherited from RWCollectable
virtual	~RWCollectable ()
virtual int	compareTo (const RWCollectable *) const
virtual RWCollectable *	copy () const
virtual unsigned	hash () const
virtual bool	isEqual (const RWCollectable *t) const
virtual RWCollectable *	newSpecies () const
RWspace	recursiveStoreSize () const
RWStringID	stringID () const

Additional Inherited Members
Static Public Member Functions inherited from RWCollectable
static RWClassID	classID (const RWStringID &name)
static RWClassID	classIsA ()
static bool	isAtom (RWClassID id)
static RWspace	nilStoreSize ()
Static Public Attributes inherited from RWCollection
static size_t	DEFAULT_CAPACITY
Related Symbols inherited from RWCollection
typedef void(*	RWapplyCollectable) (RWCollectable *, void *)
typedef bool(*	RWtestCollectable) (const RWCollectable *, const void *)
typedef bool(*	RWtestCollectablePair) (const RWCollectable *, const RWCollectable *, const void *)

Detailed Description

Class RWSequenceable is an abstract base class for collections that can be accessed by an index. It inherits class RWCollection as a public base class and adds a few extra virtual functions. This documentation only describes these extra functions.

Synopsis

#include <rw/seqcltn.h>
typedef RWSequenceable SequenceableCollection;
// Smalltalk typedef

Persistence

Polymorphic

Member Function Documentation

append()

virtual RWCollectable * RWSequenceable::append ( RWCollectable * a )

pure virtual

Adds a to the end of the collection and returns it. Returns rwnil if the insertion was unsuccessful.

Implemented in RWDlistCollectables, RWOrdered, RWSlistCollectables, RWSlistCollectablesStack, and RWSortedVector.

apply()

virtual void RWSequenceable::apply ( RWapplyCollectable ap, void * vp )

pure virtual

This function applies the user-supplied function pointed to by ap to each member of the collection. This function should have the following prototype:

void yourApplyFunction(RWCollectable* ctp, void* vp);

The function yourApplyFunction() can perform any operation on the item at address ctp that does not change the hash value or sorting order of the item. Client data may be passed to this function through the second argument vp.

Implements RWCollection.

Implemented in RWDlistCollectables, RWOrdered, and RWSlistCollectables.

at() [1/2]

virtual const RWCollectable * RWSequenceable::at ( size_t i ) const

pure virtual

Allows access to the i ^th element of the collection. The return value cannot be used as an lvalue. The index i must be between zero and the number of items in the collection less one, or an exception of type RWBoundsErr will be thrown.

Implemented in RWDlistCollectables, RWOrdered, RWSlistCollectables, and RWSortedVector.

at() [2/2]

virtual RWCollectable *& RWSequenceable::at ( size_t i )

pure virtual

Allows access to the i ^th element of the collection. The return value can be used as an lvalue. The index i must be between zero and the number of items in the collection less one, or the function throws an exception of type RWBoundsErr.

Implemented in RWDlistCollectables, RWOrdered, RWSlistCollectables, and RWSortedVector.

clear()

virtual void RWSequenceable::clear ( )

pure virtual

Removes all objects from the collection. Does not delete the objects themselves.

Implements RWCollection.

Implemented in RWDlistCollectables, RWOrdered, and RWSlistCollectables.

entries()

virtual size_t RWSequenceable::entries ( ) const

pure virtual

Returns the total number of items in the collection.

Implements RWCollection.

Implemented in RWDlistCollectables, RWOrdered, and RWSlistCollectables.

find()

virtual RWCollectable * RWSequenceable::find ( const RWCollectable * target ) const

pure virtual

Returns a pointer to the first item in the collection which "matches" the object pointed to by target or rwnil if no item was found. For most collections, an item "matches" the target if either isEqual() or compareTo() find equivalence, whichever is appropriate for the actual collection type. However, the "identity collections" (i.e., RWIdentitySet and RWIdentityDictionary) look for an item with the same address (i.e., "is identical to").

Implements RWCollection.

Implemented in RWDlistCollectables, RWOrdered, and RWSlistCollectables.

first()

virtual RWCollectable * RWSequenceable::first ( ) const

pure virtual

Returns the first item in the collection.

Implemented in RWDlistCollectables, RWOrdered, and RWSlistCollectables.

index()

virtual size_t RWSequenceable::index ( const RWCollectable * c ) const

pure virtual

Returns the index number of the first item that "matches" the item pointed to by c. If there is no such item, returns RW_NPOS. For most collections, an item "matches" the target if either isEqual() or compareTo() find equivalence, whichever is appropriate for the actual collection type.

Implemented in RWDlistCollectables, RWOrdered, RWSlistCollectables, and RWSortedVector.

insert()

virtual RWCollectable * RWSequenceable::insert ( RWCollectable * c )

pure virtual

Adds an item to the collection and returns a pointer to it. If the item is already in the collection, some collections derived from RWCollection return the old instance, others return rwnil.

Note

If self is a collection of key-value pairs (e.g. RWHashDictionary), this function throws std::bad_cast if c does not inherit from RWCollectableAssociation. If the collection does not contain an association with a key that "matches" the key of c, then a copy of the association is inserted and that association's key is returned. Otherwise, the insert fails by returning either rwnil or a pointer to the existing association's key.

Implements RWCollection.

Implemented in RWDlistCollectables, RWOrdered, RWSlistCollectables, RWSlistCollectablesStack, and RWSortedVector.

insertAt()

virtual RWCollectable * RWSequenceable::insertAt ( size_t indx, RWCollectable * e )

pure virtual

Adds a new item to the collection at position indx. The item previously at position i is moved to i+1, etc. The index indx must be between 0 and the number of items in the collection, or an exception of type RWBoundsErr will be thrown.

Implemented in RWDlistCollectables, RWOrdered, RWSlistCollectables, and RWSortedVector.

isEmpty()

virtual bool RWSequenceable::isEmpty ( ) const

pure virtual

Returns true if the collection is empty, otherwise returns false.

Implements RWCollection.

Implemented in RWDlistCollectables, RWOrdered, and RWSlistCollectables.

last()

virtual RWCollectable * RWSequenceable::last ( ) const

pure virtual

Returns the last item in the collection.

Implemented in RWDlistCollectables, RWOrdered, and RWSlistCollectables.

occurrencesOf()

virtual size_t RWSequenceable::occurrencesOf ( const RWCollectable * t ) const

pure virtual

Returns the number of items in the collection which are "matches" for t. See function find() for a definition of matches.

Implements RWCollection.

Implemented in RWDlistCollectables, RWOrdered, RWSlistCollectables, and RWSortedVector.

prepend()

virtual RWCollectable * RWSequenceable::prepend ( RWCollectable * c )

pure virtual

Adds c to the beginning of the collection and returns it. Returns rwnil if the insertion was unsuccessful.

Implemented in RWDlistCollectables, RWOrdered, RWSlistCollectables, RWSlistCollectablesQueue, and RWSortedVector.

remove()

virtual RWCollectable * RWSequenceable::remove ( const RWCollectable * target )

pure virtual

Removes and returns a pointer to the first item in the collection which "matches" the object pointed to by target. Returns nil if no object was found. Does not delete the object. See function find() for a definition of matches.

Implements RWCollection.

Implemented in RWDlistCollectables, RWOrdered, RWSlistCollectables, RWSlistCollectablesQueue, and RWSlistCollectablesStack.