PLearn::Schema Class Reference

#include <SimpleDB.h>

Inheritance diagram for PLearn::Schema:

[legend]Collaboration diagram for PLearn::Schema:

[legend]List of all members.

Public Member Functions
	Schema ()
	-- Forwarding functions for base-class constructors
	Schema (size_type n, const T &value)
	Schema (int n, const T &value)
	Schema (long n, const T &value)
	Schema (size_type n)
	Schema (const Schema &x)
	Schema (const_iterator first, const_iterator last)
bool	findColumn (const string &name, int &position, int &start, int &precision) const
	-- Additional functionality specific to Schema
FieldPtr	findColumn (int position) const
	Make a pointer-to-field from a column number (zero-based).
FieldPtr	findColumn (const string &name) const
	Make a pointer-to-field from a column name.
FieldPtr	operator() (int position) const
FieldPtr	operator() (const string &name) const
Private Types
typedef vector< Field >	inherited
typedef Field	T

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Detailed Description

A schema is essentially a vector of fields, with a few extensions to more easily find individual fields within the schema.

(Impl. note: we really should be using private inheritance here, but this is difficult to achieve since then every single function in the base class would have to be made visible through using-decl. In addition, special provisions would have to be hacked up for ensuring a smooth working of iterators. In any case, since we don't add any data member, an (accidental) destruction of a Schema by vector's destructor is in practice harmless.)

Definition at line 357 of file SimpleDB.h.

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Member Typedef Documentation

typedef vector<Field> PLearn::Schema::inherited [private]

Definition at line 359 of file SimpleDB.h.

typedef Field PLearn::Schema::T [private]

Definition at line 360 of file SimpleDB.h.

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Constructor & Destructor Documentation

PLearn::Schema::Schema (   )  [inline]

-- Forwarding functions for base-class constructors Definition at line 364 of file SimpleDB.h.

PLearn::Schema::Schema (  size_type  n, const T &  value )  [inline]

Definition at line 365 of file SimpleDB.h.

PLearn::Schema::Schema (  int  n, const T &  value )  [inline]

Definition at line 366 of file SimpleDB.h.

PLearn::Schema::Schema (  long  n, const T &  value )  [inline]

Definition at line 367 of file SimpleDB.h.

PLearn::Schema::Schema (  size_type  n  )  [inline, explicit]

Definition at line 368 of file SimpleDB.h.

PLearn::Schema::Schema (  const Schema &  x  )  [inline]

__STL_MEMBER_TEMPLATES Definition at line 369 of file SimpleDB.h. References x.

PLearn::Schema::Schema (  const_iterator  first, const_iterator  last )  [inline]

__STL_MEMBER_TEMPLATES Definition at line 376 of file SimpleDB.h.

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Member Function Documentation

FieldPtr PLearn::Schema::findColumn (  const string &  name  )  const

Make a pointer-to-field from a column name. Definition at line 88 of file SimpleDB.cc. References findColumn(), and PLERROR.

FieldPtr PLearn::Schema::findColumn (  int  position  )  const

Make a pointer-to-field from a column number (zero-based). Definition at line 74 of file SimpleDB.cc. References PLERROR.

bool PLearn::Schema::findColumn (  const string &  name, int &  position, int &  start, int &  precision )  const

-- Additional functionality specific to Schema Find a schema entry ("column") by name, return true if found, and return to position, total bytes before in a row, and number of bytes in the column Definition at line 59 of file SimpleDB.cc. Referenced by PLearn::SimpleDB< KeyType, QueryResult >::findColumn(), findColumn(), and PLearn::RowIterator::makePtr().

FieldPtr PLearn::Schema::operator() (  const string &  name  )  const [inline]

Definition at line 405 of file SimpleDB.h. References operator()().

FieldPtr PLearn::Schema::operator() (  int  position  )  const [inline]

For convenience, operator() on a string or an integer position return findColumn(). This does not conflict with any member inherited from vector<> Definition at line 401 of file SimpleDB.h. References operator()(). Referenced by operator()().

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

• SimpleDB.h
• SimpleDB.cc

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