Apache Tomcat 6.0.43

org.apache.catalina.ssi
Class ExpressionTokenizer

java.lang.Object
  extended by org.apache.catalina.ssi.ExpressionTokenizer

public class ExpressionTokenizer
extends java.lang.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.

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(java.lang.String expr)
          Creates a new parser for the specified expression.
 
Method Summary
 int getIndex()
          Returns the current index for error reporting purposes.
 java.lang.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.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

TOKEN_STRING

public static final int TOKEN_STRING
See Also:
Constant Field Values

TOKEN_AND

public static final int TOKEN_AND
See Also:
Constant Field Values

TOKEN_OR

public static final int TOKEN_OR
See Also:
Constant Field Values

TOKEN_NOT

public static final int TOKEN_NOT
See Also:
Constant Field Values

TOKEN_EQ

public static final int TOKEN_EQ
See Also:
Constant Field Values

TOKEN_NOT_EQ

public static final int TOKEN_NOT_EQ
See Also:
Constant Field Values

TOKEN_RBRACE

public static final int TOKEN_RBRACE
See Also:
Constant Field Values

TOKEN_LBRACE

public static final int TOKEN_LBRACE
See Also:
Constant Field Values

TOKEN_GE

public static final int TOKEN_GE
See Also:
Constant Field Values

TOKEN_LE

public static final int TOKEN_LE
See Also:
Constant Field Values

TOKEN_GT

public static final int TOKEN_GT
See Also:
Constant Field Values

TOKEN_LT

public static final int TOKEN_LT
See Also:
Constant Field Values

TOKEN_END

public static final int TOKEN_END
See Also:
Constant Field Values
Constructor Detail

ExpressionTokenizer

public ExpressionTokenizer(java.lang.String expr)
Creates a new parser for the specified expression.

Method Detail

hasMoreTokens

public boolean hasMoreTokens()
Returns true if there are more tokens.


getIndex

public int getIndex()
Returns the current index for error reporting purposes.


isMetaChar

protected boolean isMetaChar(char c)

nextToken

public int nextToken()
Returns the next token type and initializes any state variables accordingly.


getTokenValue

public java.lang.String getTokenValue()
Returns the String value of the token if it was type TOKEN_STRING. Otherwise null is returned.


Apache Tomcat 6.0.43

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