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Java > Open Source Codes > edu > rice > cs > drjava > model > definitions > reducedmodel > InsideBlockComment


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33
34 package edu.rice.cs.drjava.model.definitions.reducedmodel;
35
36 /**
37  * Shadowing state that corresponds to being inside a block comment.
38  * @version $Id: InsideBlockComment.java 3901 2006-06-30 05:28:11Z rcartwright $
39  */
40 public class InsideBlockComment extends ReducedModelState {
41   public static final InsideBlockComment ONLY = new InsideBlockComment();
42   
43   private InsideBlockComment() { }
44   
45     /**
46    * Walk function for inside block comment.
47    * Self-recursive and mutually recursive with other walk functions.
48    * <ol>
49    * <li> If we've reached the end of the list, return.
50    * <li> If we find * /, combine it into a single Brace, and
51    * keep the cursor on that Brace.
52    * <li> If we find // or /*, split that into two Braces and keep the cursor
53    * on the first one.
54    * <li> If current brace = * /, mark the current brace as FREE,
55    * go to the next brace, and call updateFree.<BR>
56    * Else, mark current brace as INSIDE_BLOCK_COMMENT
57    * and go to next brace and recur.
58    * </ol>
59    */
60   ReducedModelState update(TokenList.Iterator copyCursor) {
61     if (copyCursor.atEnd()) {
62       return STUTTER;
63     }
64     _combineCurrentAndNextIfFind("*", "/", copyCursor);
65     _combineCurrentAndNextIfFind("*","//", copyCursor);
66     _combineCurrentAndNextIfFind("*","/*", copyCursor);
67     _combineCurrentAndNextIfFind("","", copyCursor);
68     _combineCurrentAndNextIfEscape(copyCursor);
69         
70     copyCursor._splitCurrentIfCommentBlock(false, false);
71     
72     String JavaDoc type = copyCursor.current().getType();
73     if (type.equals("*/")) {
74       copyCursor.current().setState(FREE);
75       copyCursor.next();
76       return FREE;
77     }
78     
79     else {
80       copyCursor.current().setState(INSIDE_BLOCK_COMMENT);
81       copyCursor.next();
82       return INSIDE_BLOCK_COMMENT;
83     }
84   }
85 }
86
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