Lexer (Castor JavaDoc)

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java.lang.Object
- org.exolab.castor.jdo.oql.Lexer

```
public final class Lexer
extends java.lang.Object
```
Seperates an input string of OQL into a stream of Tokens.

Version:

$Revision: 7950 $ $Date: 2006-04-25 15:08:23 -0600 (Tue, 25 Apr 2006) $

Author:

Nissim Karpenstein

Constructor Summary

Constructors
Constructor Description

Lexer(java.lang.String oqlQueryString)
Creates a lexer which will seperate a string query into a series of tokens.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`hasMoreTokens()`	Checks whether the query strin has been fully consumed.
`Token`	`nextToken()`	Returns the next `Token` from the stream.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Lexer
```
public Lexer(java.lang.String oqlQueryString)
```
    Creates a lexer which will seperate a string query into a series of tokens.
    
    Parameters:
    
    oqlQueryString - The string representation of the OQL Query
- Method Detail
  - hasMoreTokens
```
public boolean hasMoreTokens()
```
    Checks whether the query strin has been fully consumed.
    
    Returns:
    
    True if there is text in the query which hasn't been tokenized, otherwise false.
  - nextToken
```
public Token nextToken()
                throws InvalidCharException
```
    Returns the next Token from the stream.
    
    Returns:
    
    The next token in the stream.
    
    Throws:
    
    InvalidCharException - if an invalid character is found while generating the next Token.

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