sjm.examples.query
Class JaqlParser

java.lang.Object
  |
  +--sjm.examples.query.JaqlParser

public class JaqlParser

extends java.lang.Object

This class provides a parser that recognizes a select query, without any where clauses. "Jaql" stands for "Just Another Query Language". The grammar this class supports is:

	
     select        = "select" selectTerms "from" classNames
                     optionalWhere;
     selectTerms   = commaList(selectTerm);
     selectTerm    = expression;
     classNames    = commaList(className);
     className     = Word;
     optionalwhere = empty | "where" comparisons;
     comparisons   = commaList(comparison);
     commaList(p) = p (',' p)*;
 

This grammar uses expression and comparison from ComparisonParser.

Field Summary

protected static ComparisonParser	comparisonParser
protected Speller	speller

Constructor Summary

JaqlParser(Speller speller)
Construct a query language parser that will use the given speller to find the proper spelling of class and variable names.

Method Summary

protected Parser	className()
protected Parser	classNames()
protected static Sequence	commaList(Parser p)
protected Parser	comparison()
ComparisonParser	comparisonParser() Return the parser to use for expression and comparison subparsers.
protected Parser	comparisons()
protected Parser	optionalWhere()
Parser	select() Returns a parser that will recognize a select statement.
protected Parser	selectTerm()
protected Parser	selectTerms()
Parser	start() Returns a parser that will recognize a select statement.
protected Parser	where()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

speller

protected Speller speller

comparisonParser

protected static ComparisonParser comparisonParser

Constructor Detail

JaqlParser

public JaqlParser(Speller speller)

Construct a query language parser that will use the given speller to find the proper spelling of class and variable names.

Method Detail

className

protected Parser className()

classNames

protected Parser classNames()

commaList

protected static Sequence commaList(Parser p)

comparison

protected Parser comparison()

comparisonParser

public ComparisonParser comparisonParser()

Return the parser to use for expression and comparison subparsers.

comparisons

protected Parser comparisons()

optionalWhere

protected Parser optionalWhere()

select

public Parser select()

Returns a parser that will recognize a select statement.

Returns:

a parser that will recognize a select statement.

selectTerm

protected Parser selectTerm()

selectTerms

protected Parser selectTerms()

start

public Parser start()

Returns a parser that will recognize a select statement.

Returns:

a parser that will recognize a select statement.

where

protected Parser where()