org.apache.commons.jexl.parser
Class Token
java.lang.Object
org.apache.commons.jexl.parser.Token
public class Token
- extends java.lang.Object
Describes the input token stream.
Field Summary |
int |
beginColumn
beginLine and beginColumn describe the position of the first character of
this token; endLine and endColumn describe the position of the last
character of this token. |
int |
beginLine
beginLine and beginColumn describe the position of the first character of
this token; endLine and endColumn describe the position of the last
character of this token. |
int |
endColumn
beginLine and beginColumn describe the position of the first character of
this token; endLine and endColumn describe the position of the last
character of this token. |
int |
endLine
beginLine and beginColumn describe the position of the first character of
this token; endLine and endColumn describe the position of the last
character of this token. |
java.lang.String |
image
The string image of the token. |
int |
kind
An integer that describes the kind of this token. |
Token |
next
A reference to the next regular (non-special) token from the input
stream. |
Token |
specialToken
This field is used to access special tokens that occur prior to this
token, but after the immediately preceding regular (non-special) token. |
Constructor Summary |
Token()
|
Method Summary |
static Token |
newToken(int ofKind)
Returns a new Token object, by default. |
java.lang.String |
toString()
Returns the image. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
kind
public int kind
- An integer that describes the kind of this token. This numbering system
is determined by JavaCCParser, and a table of these numbers is stored in
the file ...Constants.java.
beginLine
public int beginLine
- beginLine and beginColumn describe the position of the first character of
this token; endLine and endColumn describe the position of the last
character of this token.
beginColumn
public int beginColumn
- beginLine and beginColumn describe the position of the first character of
this token; endLine and endColumn describe the position of the last
character of this token.
endLine
public int endLine
- beginLine and beginColumn describe the position of the first character of
this token; endLine and endColumn describe the position of the last
character of this token.
endColumn
public int endColumn
- beginLine and beginColumn describe the position of the first character of
this token; endLine and endColumn describe the position of the last
character of this token.
image
public java.lang.String image
- The string image of the token.
next
public Token next
- A reference to the next regular (non-special) token from the input
stream. If this is the last token from the input stream, or if the token
manager has not read tokens beyond this one, this field is set to null.
This is true only if this token is also a regular token. Otherwise, see
below for a description of the contents of this field.
specialToken
public Token specialToken
- This field is used to access special tokens that occur prior to this
token, but after the immediately preceding regular (non-special) token.
If there are no such special tokens, this field is set to null. When
there are more than one such special token, this field refers to the last
of these special tokens, which in turn refers to the next previous
special token through its specialToken field, and so on until the first
special token (whose specialToken field is null). The next fields of
special tokens refer to other special tokens that immediately follow it
(without an intervening regular token). If there is no such token, this
field is null.
Token
public Token()
toString
public final java.lang.String toString()
- Returns the image.
- Overrides:
toString
in class java.lang.Object
newToken
public static final Token newToken(int ofKind)
- Returns a new Token object, by default. However, if you want, you can
create and return subclass objects based on the value of ofKind. Simply
add the cases to the switch for all those special cases. For example, if
you have a subclass of Token called IDToken that you want to create if
ofKind is ID, simlpy add something like :
case MyParserConstants.ID : return new IDToken();
to the following switch statement. Then you can cast matchedToken
variable to the appropriate type and use it in your lexical actions.
Copyright © 2003-2010 The Apache Software Foundation. All Rights Reserved.