A class to store string values. More...

#include <colValues.h>

Inheritance diagram for ibis::colStrings:

Public Member Functions
virtual void	bottomk (uint32_t k, array_t< uint32_t > &ind) const
	Find positions of the k smallest strings.

	colStrings (const ibis::column *c, const ibis::bitvector &hits)

	colStrings (const ibis::column *c)
	Construct ibis::colStrings from an existing list of strings.

	colStrings (size_t n, const std::string &v)

virtual uint32_t	elementSize () const

virtual bool	empty () const

virtual void	erase (uint32_t i, uint32_t j)

virtual void *	getArray () const
	Return the pointer to the pointer to underlying array_t<T> object.

virtual double	getDouble (uint32_t) const
	Return the ith value as double. NOT implemented.

virtual float	getFloat (uint32_t) const
	Return the ith value as float. NOT implemented.

virtual int32_t	getInt (uint32_t) const
	Return the ith value as int. NOT implemented.

virtual int64_t	getLong (uint32_t) const
	Return the ith value as long. NOT implemented.

virtual double	getMax () const
	Compute the maximum. NOT implemented.

virtual double	getMin () const
	Compute the minimum. NOT implemented.

virtual double	getSum () const
	Compute the sum. NOT implemented.

virtual ibis::TYPE_T	getType () const
	Return the type of the data stored.

virtual uint32_t	getUInt (uint32_t) const
	Return the ith value as unsigned int. NOT implemented.

virtual uint64_t	getULong (uint32_t) const
	Return the ith value as unsigned long. NOT implemented.

virtual void	nosharing ()
	Make sure the content of the underlying storage is not shared.

virtual void	reduce (const array_t< uint32_t > &starts)
	remove the duplicate elements according to the array starts

virtual void	reduce (const array_t< uint32_t > &starts, ibis::selectClause::AGREGADO func)

virtual void	reorder (const array_t< uint32_t > &ind)
	Reorder the values according to the specified indices. More...

virtual array_t< uint32_t > *	segment (const array_t< uint32_t > *old=0) const
	Produce an array of the starting positions of values that are the same. More...

virtual uint32_t	size () const

virtual void	sort (uint32_t i, uint32_t j, bundle *bdl)
	Sort rows in the range `[i, j)`.

virtual void	sort (uint32_t i, uint32_t j, bundle *bdl, colList::iterator head, colList::iterator tail)
	Sort rows in the range `[i, j)`. More...

virtual void	sort (uint32_t i, uint32_t j, array_t< uint32_t > &neworder) const
	Sort rows in the range `[i, j)`. More...

virtual void	swap (uint32_t i, uint32_t j)

void	swap (colStrings &rhs)

virtual void	topk (uint32_t k, array_t< uint32_t > &ind) const
	Fill the array ind with positions of the k largest elements. More...

virtual long	truncate (uint32_t keep)
	Truncate the number element to no more than `keep`.

virtual long	truncate (uint32_t keep, uint32_t start)
	Truncate the number element to no more than `keep`.

virtual long	write (FILE *fptr) const
	Write out whole array as binary. More...

virtual void	write (std::ostream &out, uint32_t i) const
	Write ith element as text. More...

Public Member Functions inherited from ibis::colValues
bool	canSort () const

const ibis::column *	columnPointer () const

const char *	name () const
	Name.

const ibis::column *	operator-> () const
	Provide a pointer to the column containing the selected values.

void	setTimeFormat (const char , const char =0)
	Add a custom format for the column to be interpretted as unix time stamps.

void	swap (colValues &rhs)

Additional Inherited Members
Static Public Member Functions inherited from ibis::colValues
static colValues *	create (const ibis::column *c)
	Implementation of the colValues class hierarchy. More...

static colValues *	create (const ibis::column *c, const ibis::bitvector &hits)
	Construct from a hit vector.

static colValues *	create (const ibis::column c, ibis::fileManager::storage store, const uint32_t start, const uint32_t end)
	Construct from content of the file (pointed by `store`). More...

Protected Member Functions inherited from ibis::colValues
	colValues (const ibis::column *c)

Protected Attributes inherited from ibis::colValues
const ibis::column *	col

ibis::column::unixTimeScribe *	utform
	!< The column where the value is from.

Detailed Description

A class to store string values.

Member Function Documentation

void ibis::colStrings::reorder ( const array_t< uint32_t > & ind )

virtual

Reorder the values according to the specified indices.

New[i] = Old[ind[i]].

Implements ibis::colValues.

References ibis::array_t< T >::size().

ibis::array_t< uint32_t > * ibis::colStrings::segment ( const array_t< uint32_t > * old = 0 ) const

virtual

Produce an array of the starting positions of values that are the same.

Implements ibis::colValues.

References ibis::array_t< T >::push_back(), and ibis::array_t< T >::size().

virtual void ibis::colStrings::sort	(	uint32_t	i,
		uint32_t	j,
		bundle *	bdl,
		colList::iterator	head,
		colList::iterator	tail
	)

virtual

Sort rows in the range [i, j).

Also sort the columns between [head, tail).

Implements ibis::colValues.

void ibis::colStrings::sort	(	uint32_t	i,
		uint32_t	j,
		array_t< uint32_t > &	neworder
	)		const

virtual

Sort rows in the range [i, j).

Output the new order in array neworder.

Implements ibis::colValues.

References ibis::array_t< T >::clear(), ibis::array_t< T >::push_back(), and ibis::array_t< T >::reserve().

void ibis::colStrings::topk	(	uint32_t	k,
		array_t< uint32_t > &	ind
	)		const

virtual

Fill the array ind with positions of the k largest elements.

The array may contain more than k elements, if the kth largest element is not unique. The array may contain less than k elements if this object contains less than k elements. The array ind contains the largest element in ascending order with the index to the largest string at the end.

Implements ibis::colValues.

References ibis::array_t< T >::clear(), and ibis::array_t< T >::resize().

long ibis::colStrings::write ( FILE * fptr ) const

virtual

Write out whole array as binary.

All bytes including the null terminators are written to the file.

Implements ibis::colValues.

void ibis::colStrings::write	(	std::ostream &	out,
		uint32_t	i
	)		const

virtual

Write ith element as text.

All valid strings (i.e., nonzero char*) are printed with double quotes. An empty string is printed with two double quotes right next to each other as "". Nothing will be printed if the arguments are invalid or out of range, and if this object itself is ill-formed.

Implements ibis::colValues.

The documentation for this class was generated from the following files:

colValues.h
colValues.cpp



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Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation