ExpressionTokenizer (Apache Tomcat 6.0.53 API Documentation)

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org.apache.catalina.ssi
Class ExpressionTokenizer

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

public class ExpressionTokenizer
extends java.lang.Object
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.