Index Class Reference

This reference page is linked to from the following overview topics: Meta Data.

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Detailed Description

Lightweight class handling index values.

adsk::Data::Stream objects contain a list of data elements. Each element has to be accessed by index. In the simplest case the index is an array index (of type IndexCount, whose typedef appears above) but there can be more complex cases as well, such as a pair of integers, or a string.

This is the base class used by the adsk::Data:Stream indexing system. It is configured to be as efficient as possible in the simple index case while allowing extension to arbitrary index types. The simple integer index value is contained within this class. More complex index types are stored in a letter class of type "IndexType".

It can be used as the basis of a mapping from a general index type onto an adsk::Data::Index value, used for data referencing. Its purpose is to overload the concept of a general std::map<Index, Index> so that in the simple case where Index is the same as Index no mapping is required. The calling classes are responsible for creating that relationship, the methods in this class are defined to support that use.

#include <adskDataIndex.h>

List of all members.

Public Types
typedef Index(*	IndexCreator )(const std::string &)
	False if using fIndex and simple IndexCount index types, otherwise use fComplexIndex.
Public Member Functions
	Index (IndexCount value)
	Conversion constructor.
	Index (const Index &rhs)
	Copy constructor, simplest level.
	Index (const IndexType &rhs)
	Conversion constructor.
	Index (const std::string &indexValue)
	Constructor based on an index value in a string. Search for all occurrences
	~Index ()
	Default destructor, release the ComplexIndex if there is one.
Index &	operator= (IndexCount rhs)
	IndexCount assignment operator.
Index &	operator= (const Index &rhs)
	Class assignment operator.
	operator IndexCount () const
	IndexCount cast operator.
IndexCount	index () const
	IndexCount extraction.
	operator IndexType * ()
	IndexType* cast operator.
std::string	asString () const
	Get the Index in string form.
IndexType *	complexIndex ()
	Quick access to the complex index, if it's used.
bool	supportsDenseMode () const
	Notifies users that this index type can be packed densely.
IndexCount	denseSpaceBetween (const Index &rhs) const
	Calculate the dense space occupied between two indices.
bool	operator== (const Index &rhs) const
	Equality operator, checks if this Index is the same as another.
bool	operator!= (const Index &rhs) const
	Inequality operator, checks if this Index is not the same as another.
bool	operator< (const Index &rhs) const
	Less-than operator, checks if this Index is less than another Put simple index types before complex ones.
bool	operator<= (const Index &rhs) const
	Less-or-equal operator, checks if this Index is <= another Put simple index types before complex ones.
bool	operator> (const Index &rhs) const
	Greater-than operator, checks if this Index is greater than another Put simple index types before complex ones.
bool	operator>= (const Index &rhs) const
	Greater-or-equal operator, checks if this Index is >= another Put simple index types before complex ones.
std::string	typeName () const
	Get the type name of this object.
Static Public Member Functions
static bool	Debug (const Index *me, Debug::Print &request)
	Answer a Print request for an Index object.
static bool	Debug (const Index *me, Debug::Footprint &request)
	Answer a footprint request for an Index object.
static Index	doCreate (const std::string &, const std::string &)
	Create an Index of a given type from a string description of the value.
static IndexCreator	creator (const std::string &)
	Get a function for construction of a given index type.
static std::string	theTypeName ()
	Get the type name of the simple index type.

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Constructor & Destructor Documentation

Index

(

IndexCount

rhs

)

Conversion constructor.

Parameters:

[in]

rhs

IndexCount value to be copied

Index

(

const Index &

rhs

)

Copy constructor, simplest level.

Parameters:

[in]

rhs

Index data to be copied

Index

(

const IndexType &

rhs

)

Conversion constructor.

Parameters:

[in]

rhs

ComplexIndex value to be copied

Index

(

const std::string &

value

)

Constructor based on an index value in a string.

Parameters:

[in]

value

Index value for construction, must be a single numeric value

Exceptions:

Index::kBadSyntax	Non-numeric values present, or no number present
Index::kExcessData	More than just a single number present

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Member Function Documentation

Index & operator=

(

IndexCount

rhs

)

IndexCount assignment operator.

Parameters:

[in]

rhs

IndexCount value to be copied

Index & operator=

(

const Index &

rhs

)

Class assignment operator.

Parameters:

[in]

rhs

Index data to be copied

IndexCount index

(

)

const

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IndexCount extraction.

Returns:

Single array index associated with this Index

std::string asString

(

)

const

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Get the Index in string form.

Returns:

String representing the index value (in the same form expected by the creator functions)

IndexType * complexIndex

(

)

[inline]

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Quick access to the complex index, if it's used.

Returns:

Pointer to the complex index type, or NULL if the index is simple

bool supportsDenseMode

(

)

const

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Notifies users that this index type can be packed densely.

Returns:

ComplexIndex dense support if it exists, otherwise true since the default index type supports density.

IndexCount denseSpaceBetween

(

const Index &

rhs

)

const

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Calculate the dense space occupied between two indices.

Dense packing of a linear index requires the number of elements between the two indices - easy peasy.

Parameters:

[in]

rhs

The Index from which the density is to be calculated

Returns:

Number of elements betweeen this one and the parameter, including both of the endpoints. Returns 0 if the dense packing cannot be supported.

bool operator==

(

const Index &

rhs

)

const

Equality operator, checks if this Index is the same as another.

Parameters:

[in]

rhs

Index to be compared

Returns:

true if the two Index objects have the same underlying IndexCount

bool operator!=

(

const Index &

rhs

)

const

Inequality operator, checks if this Index is not the same as another.

Parameters:

[in]

rhs

Index to be compared

Returns:

true if the two Index objects have a different underlying IndexCount

bool operator<

(

const Index &

rhs

)

const

Less-than operator, checks if this Index is less than another Put simple index types before complex ones.

Parameters:

[in]

rhs

Index to be compared

Returns:

true if this Index's counter is less than rhs's

bool operator<=

(

const Index &

rhs

)

const

Less-or-equal operator, checks if this Index is <= another Put simple index types before complex ones.

Parameters:

[in]

rhs

Index to be compared

Returns:

true if this Index's counter is less than or equal to rhs's

bool operator>

(

const Index &

rhs

)

const

Greater-than operator, checks if this Index is greater than another Put simple index types before complex ones.

Parameters:

[in]

rhs

Index to be compared

Returns:

true if this Index's counter is greater than rhs's

bool operator>=

(

const Index &

rhs

)

const

Greater-or-equal operator, checks if this Index is >= another Put simple index types before complex ones.

Parameters:

[in]

rhs

Index to be compared

Returns:

true if this Index's counter is greater than or equal to rhs's

bool Debug	(	const Index *	me,
		Debug::Print &	request
	)		[static]

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Answer a Print request for an Index object.

Use the request object to dump all information on the "me" Index, or all static Index information if "me" is NULL.

Parameters:

[in]	me	Pointer to object to debug, NULL means class static
[out]	request	Print request object

Returns:

True if the request was successfully processed.

bool Debug	(	const Index *	me,
		Debug::Footprint &	request
	)		[static]

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Answer a footprint request for an Index object.

Populate the Footprint request with the information on all data stored within this class if "me" is NULL, otherwise the information stored in the Index object pointed at by "me".

Parameters:

[in]	me	Pointer to object to footprint, NULL means class static
[out]	request	Footprint object to populate

Returns:

True if the request was successfully processed. The Footprint object will have all information added to it.

Index doCreate	(	const std::string &	typeName,
		const std::string &	value
	)		[static]

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Create an Index of a given type from a string description of the value.

If the creation failed for any reason, e.g. unrecognized type or invalid string value, then an exception is thrown.

Parameters:

[in]	typeName	Name of the Index type
[in]	value	String which defines the Index value

Returns:

True if the request was successfully processed.

Index::IndexCreator creator

(

const std::string &

typeName

)

[static]

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Get a function for construction of a given index type.

Although the doCreate() method will create any type of index from a pair of strings when you are processing a whole series of index values of the same type there is no need to re-parse the type name for every index. In those cases you can access the creation function directly with this method and then call it repeatedly with the set of value strings. (e.g. in file I/O)

Parameters:

[in]

typeName

Name of the Index type for eventual construction

Returns:

Function that will construct an index of the given type from a string with its value.

std::string theTypeName

(

)

[static]

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Get the type name of the simple index type.

Other index types require creation of a complex member.

Returns:

String with the simple index type name

std::string typeName

(

)

const

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Get the type name of this object.

If it's a simple type then the type name is this object's name, otherwise it's the name of the fComplexIndex member.

Returns:

String with this index type's name