Select-class for flex/bison scanner/parser for RecordGram. More...

#include <RecordGram.h>

Static Public Member Functions
static TableExprNode	parse (const RecordInterface &record, const String &expression)
	Convert an expression string to an expression tree.
static TableExprNode	parse (const Table &table, const String &expression)
	Convert an expression string to an expression tree.
static TableExprNode	handleLiteral (RecordGramVal *)
	Create a TableExprNode from a literal.
static TableExprNode	handleField (const String &name)
	Find the field name and create a TableExprNode from it.
static TableExprNode	handleFunc (const String &name, const TableExprNodeSet &arguments)
	Handle a function.
static TableExprNode	handleRegex (const TableExprNode &left, const String &regex)
	Handle a regex.
static void	setNodePtr (TableExprNode *nodePtr)
	Set the final node pointer.
Static Public Attributes
static TaQLStyle	theirTaQLStyle
	Define the global TaQLStyle to use.
Static Private Member Functions
static TableExprNode	doParse (const String &expression)
	Do the conversion of an expression string to an expression tree.
Static Private Attributes
static const RecordInterface *	theirRecPtr
static const Table *	theirTabPtr
static TableExprNode *	theirNodePtr
static Mutex	theirMutex

Detailed Description

Select-class for flex/bison scanner/parser for RecordGram.

Intended use:

Internal

Review Status

Reviewed By:: UNKNOWN
Date Reviewed:: before2004/08/25

Prerequisite

RecordGram.l and .y (flex and bison grammar)

Synopsis

This class is needed for the the actions in the flex scanner and bison parser. This stores the information by constructing RecordGram objects as needed and storing them in a List.

An expression can be given as a string and parsed by the parse function. The grammar used is as much as possible the same as that for the WHERE clause in TaQL (see AIPS++ note 199). It is possible to set the TaQL style to use by setting theirTaQLStyle before calling the parse functions. A better way is to define the style with the 'USING STYLE' part of the command (similar to TaQL).

Motivation

It is necessary to be able to give a record select command in ASCII. It is used by the ACSIS people.

Definition at line 172 of file RecordGram.h.

Member Function Documentation

static TableExprNode casa::RecordGram::doParse ( const String & expression ) [static, private]

Do the conversion of an expression string to an expression tree.

static TableExprNode casa::RecordGram::handleField ( const String & name ) [static]

Find the field name and create a TableExprNode from it.

static TableExprNode casa::RecordGram::handleFunc	(	const String &	name,
		const TableExprNodeSet &	arguments
	)		`[static]`

Handle a function.

static TableExprNode casa::RecordGram::handleLiteral ( RecordGramVal * ) [static]

Create a TableExprNode from a literal.

static TableExprNode casa::RecordGram::handleRegex	(	const TableExprNode &	left,
		const String &	regex
	)		`[static]`

Handle a regex.

static TableExprNode casa::RecordGram::parse	(	const RecordInterface &	record,
		const String &	expression
	)		`[static]`

Convert an expression string to an expression tree.

The expression will operate on a series of Record objects. The given record is needed to know the type of the fields used in the expression.

static TableExprNode casa::RecordGram::parse	(	const Table &	table,
		const String &	expression
	)		`[static]`

Convert an expression string to an expression tree.

The expression will operate on the given table.

static void casa::RecordGram::setNodePtr ( TableExprNode * nodePtr ) [inline, static]

Set the final node pointer.

Definition at line 206 of file RecordGram.h.

References theirNodePtr.

Member Data Documentation

Mutex casa::RecordGram::theirMutex [static, private]

Definition at line 220 of file RecordGram.h.

TableExprNode* casa::RecordGram::theirNodePtr [static, private]

Definition at line 219 of file RecordGram.h.

Referenced by setNodePtr().

const RecordInterface* casa::RecordGram::theirRecPtr [static, private]

Definition at line 217 of file RecordGram.h.

const Table* casa::RecordGram::theirTabPtr [static, private]

Definition at line 218 of file RecordGram.h.

TaQLStyle casa::RecordGram::theirTaQLStyle [static]

Define the global TaQLStyle to use.

By default it is glish style.

Definition at line 211 of file RecordGram.h.

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

casacore/tables/Tables/RecordGram.h

Static Public Member Functions

Static Public Attributes

Static Private Member Functions

Static Private Attributes