LexerInterpreter.java 文件源码

public LexerInterpreter(String grammarFileName, Collection<String> tokenNames, Collection<String> ruleNames, Collection<String> modeNames, ATN atn, CharStream input) {
    super(input);

    if (atn.grammarType != ATNType.LEXER) {
        throw new IllegalArgumentException("The ATN must be a lexer ATN.");
    }

    this.grammarFileName = grammarFileName;
    this.atn = atn;
    this.tokenNames = tokenNames.toArray(new String[tokenNames.size()]);
    this.ruleNames = ruleNames.toArray(new String[ruleNames.size()]);
    this.modeNames = modeNames.toArray(new String[modeNames.size()]);

    this._decisionToDFA = new DFA[atn.getNumberOfDecisions()];
    for (int i = 0; i < _decisionToDFA.length; i++) {
        _decisionToDFA[i] = new DFA(atn.getDecisionState(i), i);
    }
    this._interp = new LexerATNSimulator(this,atn,_decisionToDFA,_sharedContextCache);
}