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There is a newer version: 4.8
// Generated from DSWrapper.g4 by ANTLR 4.5

  package queryserver.parser;

import org.antlr.v4.runtime.atn.*;
import org.antlr.v4.runtime.dfa.DFA;
import org.antlr.v4.runtime.*;
import org.antlr.v4.runtime.misc.*;
import org.antlr.v4.runtime.tree.*;
import java.util.List;
import java.util.Iterator;
import java.util.ArrayList;

@SuppressWarnings({"all", "warnings", "unchecked", "unused", "cast"})
public class DSWrapperParser extends Parser {
	static { RuntimeMetaData.checkVersion("4.5", RuntimeMetaData.VERSION); }

	protected static final DFA[] _decisionToDFA;
	protected static final PredictionContextCache _sharedContextCache =
		new PredictionContextCache();
	public static final int
		EQ=1, NEQ=2, IpV4Address=3, MinusSign=4, PlusSign=5, IpV6Address=6, Number=7, 
		Letters=8, Quoted=9, Literal=10, STAR=11, SLASH=12, WS=13;
	public static final int
		RULE_program = 0;
	public static final String[] ruleNames = {
		"program"
	};

	private static final String[] _LITERAL_NAMES = {
		null, "'='", "'!='", null, "'-'", "'+'", null, null, null, null, null, 
		"'*'", "'/'"
	};
	private static final String[] _SYMBOLIC_NAMES = {
		null, "EQ", "NEQ", "IpV4Address", "MinusSign", "PlusSign", "IpV6Address", 
		"Number", "Letters", "Quoted", "Literal", "STAR", "SLASH", "WS"
	};
	public static final Vocabulary VOCABULARY = new VocabularyImpl(_LITERAL_NAMES, _SYMBOLIC_NAMES);

	/**
	 * @deprecated Use {@link #VOCABULARY} instead.
	 */
	@Deprecated
	public static final String[] tokenNames;
	static {
		tokenNames = new String[_SYMBOLIC_NAMES.length];
		for (int i = 0; i < tokenNames.length; i++) {
			tokenNames[i] = VOCABULARY.getLiteralName(i);
			if (tokenNames[i] == null) {
				tokenNames[i] = VOCABULARY.getSymbolicName(i);
			}

			if (tokenNames[i] == null) {
				tokenNames[i] = "";
			}
		}
	}

	@Override
	@Deprecated
	public String[] getTokenNames() {
		return tokenNames;
	}

	@Override

	public Vocabulary getVocabulary() {
		return VOCABULARY;
	}

	@Override
	public String getGrammarFileName() { return "DSWrapper.g4"; }

	@Override
	public String[] getRuleNames() { return ruleNames; }

	@Override
	public String getSerializedATN() { return _serializedATN; }

	@Override
	public ATN getATN() { return _ATN; }

	public DSWrapperParser(TokenStream input) {
		super(input);
		_interp = new ParserATNSimulator(this,_ATN,_decisionToDFA,_sharedContextCache);
	}
	public static class ProgramContext extends ParserRuleContext {
		public TerminalNode EOF() { return getToken(DSWrapperParser.EOF, 0); }
		public ProgramContext(ParserRuleContext parent, int invokingState) {
			super(parent, invokingState);
		}
		@Override public int getRuleIndex() { return RULE_program; }
		@Override
		public void enterRule(ParseTreeListener listener) {
			if ( listener instanceof DSWrapperListener ) ((DSWrapperListener)listener).enterProgram(this);
		}
		@Override
		public void exitRule(ParseTreeListener listener) {
			if ( listener instanceof DSWrapperListener ) ((DSWrapperListener)listener).exitProgram(this);
		}
		@Override
		public  T accept(ParseTreeVisitor visitor) {
			if ( visitor instanceof DSWrapperVisitor ) return ((DSWrapperVisitor)visitor).visitProgram(this);
			else return visitor.visitChildren(this);
		}
	}

	public final ProgramContext program() throws RecognitionException {
		ProgramContext _localctx = new ProgramContext(_ctx, getState());
		enterRule(_localctx, 0, RULE_program);
		try {
			enterOuterAlt(_localctx, 1);
			{
			setState(2);
			match(EOF);
			}
		}
		catch (RecognitionException re) {
			_localctx.exception = re;
			_errHandler.reportError(this, re);
			_errHandler.recover(this, re);
		}
		finally {
			exitRule();
		}
		return _localctx;
	}

	public static final String _serializedATN =
		"\3\u0430\ud6d1\u8206\uad2d\u4417\uaef1\u8d80\uaadd\3\17\7\4\2\t\2\3\2"+
		"\3\2\3\2\2\2\3\2\2\2\5\2\4\3\2\2\2\4\5\7\2\2\3\5\3\3\2\2\2\2";
	public static final ATN _ATN =
		new ATNDeserializer().deserialize(_serializedATN.toCharArray());
	static {
		_decisionToDFA = new DFA[_ATN.getNumberOfDecisions()];
		for (int i = 0; i < _ATN.getNumberOfDecisions(); i++) {
			_decisionToDFA[i] = new DFA(_ATN.getDecisionState(i), i);
		}
	}
}