Source Code Cross Referenced for TokenMgrError.java in  » Template-Engine » Velocity » org » apache » velocity » runtime » parser » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Template Engine » Velocity » org.apache.velocity.runtime.parser 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:/* Generated By:JavaCC: Do not edit this  line. TokenMgrError.java Version 3.0 */
002:package org.apache.velocity.runtime.parser;
003:
004:public class TokenMgrError extends Error
005:{
006:   /*
007:    * Ordinals for various reasons why an Error of this type can be thrown.
008:    */
009:
010:   /**
011:    * Lexical error occured.
012:    */
013:   static final int LEXICAL_ERROR = 0;
014:
015:   /**
016:    * An attempt wass made to create a second instance of a static token manager.
017:    */
018:   static final int STATIC_LEXER_ERROR = 1;
019:
020:   /**
021:    * Tried to change to an invalid lexical state.
022:    */
023:   static final int INVALID_LEXICAL_STATE = 2;
024:
025:   /**
026:    * Detected (and bailed out of) an infinite loop in the token manager.
027:    */
028:   static final int LOOP_DETECTED = 3;
029:
030:   /**
031:    * Indicates the reason why the exception is thrown. It will have
032:    * one of the above 4 values.
033:    */
034:   int errorCode;
035:
036:   /**
037:    * Replaces unprintable characters by their espaced (or unicode escaped)
038:    * equivalents in the given string
039:    */
040:   protected static final String addEscapes(String str) {
041:      StringBuffer retval = new StringBuffer();
042:      char ch;
043:      for (int i = 0; i < str.length(); i++) {
044:        switch (str.charAt(i))
045:        {
046:           case 0 :
047:              continue;
048:           case '\b':
049:              retval.append("\\b");
050:              continue;
051:           case '\t':
052:              retval.append("\\t");
053:              continue;
054:           case '\n':
055:              retval.append("\\n");
056:              continue;
057:           case '\f':
058:              retval.append("\\f");
059:              continue;
060:           case '\r':
061:              retval.append("\\r");
062:              continue;
063:           case '\"':
064:              retval.append("\\\"");
065:              continue;
066:           case '\'':
067:              retval.append("\\\'");
068:              continue;
069:           case '\\':
070:              retval.append("\\\\");
071:              continue;
072:           default:
073:              if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
074:                 String s = "0000" + Integer.toString(ch, 16);
075:                 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
076:              } else {
077:                 retval.append(ch);
078:              }
079:              continue;
080:        }
081:      }
082:      return retval.toString();
083:   }
084:
085:   /**
086:    * Returns a detailed message for the Error when it is thrown by the
087:    * token manager to indicate a lexical error.
088:    * Parameters :
089:    *    EOFSeen     : indicates if EOF caused the lexicl error
090:    *    curLexState : lexical state in which this error occured
091:    *    errorLine   : line number when the error occured
092:    *    errorColumn : column number when the error occured
093:    *    errorAfter  : prefix that was seen before this error occured
094:    *    curchar     : the offending character
095:    * Note: You can customize the lexical error message by modifying this method.
096:    */
097:   protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
098:      return("Lexical error at line " +
099:           errorLine + ", column " +
100:           errorColumn + ".  Encountered: " +
101:           (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") +
102:           "after : \"" + addEscapes(errorAfter) + "\"");
103:   }
104:
105:   /**
106:    * You can also modify the body of this method to customize your error messages.
107:    * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
108:    * of end-users concern, so you can return something like :
109:    *
110:    *     "Internal Error : Please file a bug report .... "
111:    *
112:    * from this method for such cases in the release version of your parser.
113:    */
114:   public String getMessage() {
115:      return super .getMessage();
116:   }
117:
118:   /*
119:    * Constructors of various flavors follow.
120:    */
121:
122:   public TokenMgrError() {
123:   }
124:
125:   public TokenMgrError(String message, int reason) {
126:      super (message);
127:      errorCode = reason;
128:   }
129:
130:   public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
131:      this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
132:   }
133:}
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