001    /* Generated By:JavaCC: Do not edit this line. Token.java Version 5.0 */
002    /* JavaCCOptions:TOKEN_EXTENDS=,KEEP_LINE_COL=null,SUPPORT_CLASS_VISIBILITY_PUBLIC=true */
003    package org.apache.commons.jexl2.parser;
004    
005    /**
006     * Describes the input token stream.
007     */
008    
009    public class Token implements java.io.Serializable {
010    
011      /**
012       * The version identifier for this Serializable class.
013       * Increment only if the <i>serialized</i> form of the
014       * class changes.
015       */
016      private static final long serialVersionUID = 1L;
017    
018      /**
019       * An integer that describes the kind of this token.  This numbering
020       * system is determined by JavaCCParser, and a table of these numbers is
021       * stored in the file ...Constants.java.
022       */
023      public int kind;
024    
025      /** The line number of the first character of this Token. */
026      public int beginLine;
027      /** The column number of the first character of this Token. */
028      public int beginColumn;
029      /** The line number of the last character of this Token. */
030      public int endLine;
031      /** The column number of the last character of this Token. */
032      public int endColumn;
033    
034      /**
035       * The string image of the token.
036       */
037      public String image;
038    
039      /**
040       * A reference to the next regular (non-special) token from the input
041       * stream.  If this is the last token from the input stream, or if the
042       * token manager has not read tokens beyond this one, this field is
043       * set to null.  This is true only if this token is also a regular
044       * token.  Otherwise, see below for a description of the contents of
045       * this field.
046       */
047      public Token next;
048    
049      /**
050       * This field is used to access special tokens that occur prior to this
051       * token, but after the immediately preceding regular (non-special) token.
052       * If there are no such special tokens, this field is set to null.
053       * When there are more than one such special token, this field refers
054       * to the last of these special tokens, which in turn refers to the next
055       * previous special token through its specialToken field, and so on
056       * until the first special token (whose specialToken field is null).
057       * The next fields of special tokens refer to other special tokens that
058       * immediately follow it (without an intervening regular token).  If there
059       * is no such token, this field is null.
060       */
061      public Token specialToken;
062    
063      /**
064       * An optional attribute value of the Token.
065       * Tokens which are not used as syntactic sugar will often contain
066       * meaningful values that will be used later on by the compiler or
067       * interpreter. This attribute value is often different from the image.
068       * Any subclass of Token that actually wants to return a non-null value can
069       * override this method as appropriate.
070       */
071      public Object getValue() {
072        return null;
073      }
074    
075      /**
076       * No-argument constructor
077       */
078      public Token() {}
079    
080      /**
081       * Constructs a new token for the specified Image.
082       */
083      public Token(int kind)
084      {
085        this(kind, null);
086      }
087    
088      /**
089       * Constructs a new token for the specified Image and Kind.
090       */
091      public Token(int kind, String image)
092      {
093        this.kind = kind;
094        this.image = image;
095      }
096    
097      /**
098       * Returns the image.
099       */
100      public String toString()
101      {
102        return image;
103      }
104    
105      /**
106       * Returns a new Token object, by default. However, if you want, you
107       * can create and return subclass objects based on the value of ofKind.
108       * Simply add the cases to the switch for all those special cases.
109       * For example, if you have a subclass of Token called IDToken that
110       * you want to create if ofKind is ID, simply add something like :
111       *
112       *    case MyParserConstants.ID : return new IDToken(ofKind, image);
113       *
114       * to the following switch statement. Then you can cast matchedToken
115       * variable to the appropriate type and use sit in your lexical actions.
116       */
117      public static Token newToken(int ofKind, String image)
118      {
119        switch(ofKind)
120        {
121          default : return new Token(ofKind, image);
122        }
123      }
124    
125      public static Token newToken(int ofKind)
126      {
127        return newToken(ofKind, null);
128      }
129    
130    }
131    /* JavaCC - OriginalChecksum=28f3293a1d27d70edea279be2f20585e (do not edit this line) */