org.exolab.castor.jdo.oql
Class Lexer
java.lang.Object
org.exolab.castor.jdo.oql.Lexer
- TokenTypes
public class Lexer
extends java.lang.Object
Seperates an input string of OQL into a stream of
Token
s.
$Revision: 1.1.1.1 $ $Date: 2003/03/03 07:08:22 $
ARROW , BOOLEAN_LITERAL , CHAR_LITERAL , COLON , COMMA , CONCAT , DATE_LITERAL , DIVIDE , DOLLAR , DOT , DOUBLE_LITERAL , END_OF_QUERY , EQUAL , GT , GTE , IDENTIFIER , KEYWORD_ABS , KEYWORD_AND , KEYWORD_AS , KEYWORD_ASC , KEYWORD_AVG , KEYWORD_BETWEEN , KEYWORD_BY , KEYWORD_COUNT , KEYWORD_DESC , KEYWORD_DISTINCT , KEYWORD_FROM , KEYWORD_IN , KEYWORD_IS_DEFINED , KEYWORD_IS_UNDEFINED , KEYWORD_LIKE , KEYWORD_LIMIT , KEYWORD_LIST , KEYWORD_MAX , KEYWORD_MIN , KEYWORD_MOD , KEYWORD_NIL , KEYWORD_NOT , KEYWORD_OR , KEYWORD_ORDER , KEYWORD_SELECT , KEYWORD_SUM , KEYWORD_UNDEFINED , KEYWORD_WHERE , LONG_LITERAL , LPAREN , LT , LTE , MINUS , NOT_EQUAL , PLUS , RPAREN , STRING_LITERAL , TIMES , TIMESTAMP_LITERAL , TIME_LITERAL |
Lexer(String oqlQueryString) - Creates a lexer which will seperate a string query into a series of
tokens.
|
_pos
(package private) int _pos
_queryString
(package private) String _queryString
endOfQueryPassed
(package private) boolean endOfQueryPassed
keywords
(package private) Hashtable keywords
Lexer
public Lexer(String oqlQueryString)
Creates a lexer which will seperate a string query into a series of
tokens.
oqlQueryString
- The string representation of the OQL Query
hasMoreTokens
public boolean hasMoreTokens()
Checks whether the query strin has been fully consumed.
- True if there is text in the query which hasn't been tokenized,
otherwise false.
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