ExpressionTokenizer (Apache Tomcat 8.0.15 API Documentation)

java.lang.Object
- org.apache.catalina.ssi.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.

Author:

Paul Speed

Field Summary

Fields
Modifier and Type	Field and Description
`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

Constructors
Constructor and Description

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

Constructors
Constructor and Description
`ExpressionTokenizer(String expr)` Creates a new parser for the specified expression.

Method Summary

Methods
Modifier and Type	Method and Description
`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.

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

Class ExpressionTokenizer

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

TOKEN_STRING

TOKEN_AND

TOKEN_OR

TOKEN_NOT

TOKEN_EQ

TOKEN_NOT_EQ

TOKEN_RBRACE

TOKEN_LBRACE

TOKEN_GE

TOKEN_LE

TOKEN_GT

TOKEN_LT

TOKEN_END

Constructor Detail

ExpressionTokenizer

Method Detail

hasMoreTokens

getIndex

isMetaChar

nextToken

getTokenValue