/*
* [The "BSD license"]
* Copyright (c) 2012 Terence Parr
* Copyright (c) 2012 Sam Harwell
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.antlr.v4.runtime;
import org.antlr.v4.runtime.atn.ATN;
import org.antlr.v4.runtime.atn.ATNType;
import org.antlr.v4.runtime.atn.LexerATNSimulator;
import org.antlr.v4.runtime.atn.PredictionContextCache;
import org.antlr.v4.runtime.dfa.DFA;
import org.antlr.v4.runtime.misc.NotNull;
import java.util.Collection;
public class LexerInterpreter extends Lexer {
protected final String grammarFileName;
protected final ATN atn;
@Deprecated
protected final String[] tokenNames;
protected final String[] ruleNames;
protected final String[] modeNames;
@NotNull
private final Vocabulary vocabulary;
protected final DFA[] _decisionToDFA;
protected final PredictionContextCache _sharedContextCache =
new PredictionContextCache();
@Deprecated
public LexerInterpreter(String grammarFileName, Collection<String> tokenNames, Collection<String> ruleNames, Collection<String> modeNames, ATN atn, CharStream input) {
this(grammarFileName, VocabularyImpl.fromTokenNames(tokenNames.toArray(new String[tokenNames.size()])), ruleNames, modeNames, atn, input);
}
public LexerInterpreter(String grammarFileName, @NotNull Vocabulary vocabulary, 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 = new String[atn.maxTokenType];
for (int i = 0; i < tokenNames.length; i++) {
tokenNames[i] = vocabulary.getDisplayName(i);
}
this.ruleNames = ruleNames.toArray(new String[ruleNames.size()]);
this.modeNames = modeNames.toArray(new String[modeNames.size()]);
this.vocabulary = vocabulary;
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);
}
@Override
public ATN getATN() {
return atn;
}
@Override
public String getGrammarFileName() {
return grammarFileName;
}
@Override
@Deprecated
public String[] getTokenNames() {
return tokenNames;
}
@Override
public String[] getRuleNames() {
return ruleNames;
}
@Override
public String[] getModeNames() {
return modeNames;
}
@Override
public Vocabulary getVocabulary() {
if (vocabulary != null) {
return vocabulary;
}
return super.getVocabulary();
}
}