org.exolab.castor.jdo.oql

Class Parser

java.lang.Object

org.exolab.castor.jdo.oql.Parser

public final class Parser
extends java.lang.Object

Generates a parse tree for a stream of tokens representing an OQL query.

Version:

$Revision: 5951 $ $Date: 2006-01-03 17:47:48 -0700 (Tue, 03 Jan 2006) $

Author:

Nissim Karpenstein

Field Summary

Fields

Modifier and Type	Field and Description
(package private) Token	_curToken
(package private) Lexer	_lexer
(package private) Token	_nextToken
(package private) ParseTreeNode	_treeRoot

Constructor Summary

Constructors

Constructor and Description
Parser(Lexer lexer) Creates a parser which will generate a parse tree from a series of tokens.

Method Summary

Modifier and Type	Method and Description
ParseTreeNode	getParseTree() Generates the parse tree for the tokens provided by the Lexer passed in the constructor.

Methods inherited from class java.lang.Object

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

Field Detail

_lexer

Lexer _lexer

_curToken

Token _curToken

_nextToken

Token _nextToken

_treeRoot

ParseTreeNode _treeRoot

Constructor Detail

Parser

public Parser(Lexer lexer)
       throws InvalidCharException,
              OQLSyntaxException

Creates a parser which will generate a parse tree from a series of tokens.

Parameters:

lexer - Lexer instance.

Throws:

InvalidCharException - thrown by primeLexer.

OQLSyntaxException - thrown by primeLexer.

Method Detail

getParseTree

public ParseTreeNode getParseTree()
                           throws InvalidCharException,
                                  OQLSyntaxException

Generates the parse tree for the tokens provided by the Lexer passed in the constructor.

Returns:

a ParseTreeNode representing the query.

Throws:

InvalidCharException - thrown by match.

OQLSyntaxException - thrown by match.