org.apache.catalina.ssi

Class ExpressionTokenizer

public class ExpressionTokenizer extends Object

Parses an expression string to return the individual tokens. This is patterned similar to the StreamTokenizer in the JDK but customized for SSI conditional expression parsing.

Version: $Revision: 531303 $

Author: Paul Speed

Field Summary
static int	TOKEN_AND
static int	TOKEN_END
static int	TOKEN_EQ
static int	TOKEN_GE
static int	TOKEN_GT
static int	TOKEN_LBRACE
static int	TOKEN_LE
static int	TOKEN_LT
static int	TOKEN_NOT
static int	TOKEN_NOT_EQ
static int	TOKEN_OR
static int	TOKEN_RBRACE
static int	TOKEN_STRING

Constructor Summary
	ExpressionTokenizer(String expr) Creates a new parser for the specified expression.

Method Summary
int	getIndex() Returns the current index for error reporting purposes.
String	getTokenValue() Returns the String value of the token if it was type TOKEN_STRING.
boolean	hasMoreTokens() Returns true if there are more tokens.
protected boolean	isMetaChar(char c)
int	nextToken() Returns the next token type and initializes any state variables accordingly.