/*  Copyright (C) 2003-2011 JabRef contributors.
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
// $ANTLR : "Lexer.g" -> "SearchExpressionLexer.java"$

package net.sf.jabref.search;

import java.io.InputStream;
import java.io.Reader;
import java.util.Hashtable;

import antlr.ANTLRHashString;
import antlr.ByteBuffer;
import antlr.CharBuffer;
import antlr.CharStreamException;
import antlr.CharStreamIOException;
import antlr.InputBuffer;
import antlr.LexerSharedInputState;
import antlr.NoViableAltForCharException;
import antlr.RecognitionException;
import antlr.Token;
import antlr.TokenStream;
import antlr.TokenStreamException;
import antlr.TokenStreamIOException;
import antlr.TokenStreamRecognitionException;
import antlr.collections.impl.BitSet;

@SuppressWarnings({"unchecked", "unused"})
public class SearchExpressionLexer extends antlr.CharScanner implements SearchExpressionLexerTokenTypes, TokenStream
 {
public SearchExpressionLexer(InputStream in) {
	this(new ByteBuffer(in));
}
public SearchExpressionLexer(Reader in) {
	this(new CharBuffer(in));
}
public SearchExpressionLexer(InputBuffer ib) {
	this(new LexerSharedInputState(ib));
}

public SearchExpressionLexer(LexerSharedInputState state) {
	super(state);
	caseSensitiveLiterals = false;
	setCaseSensitive(false);
	literals = new Hashtable<ANTLRHashString, Integer>();
	literals.put(new ANTLRHashString("matches", this), new Integer(8));
	literals.put(new ANTLRHashString("or", this), new Integer(5));
	literals.put(new ANTLRHashString("and", this), new Integer(4));
	literals.put(new ANTLRHashString("not", this), new Integer(6));
	literals.put(new ANTLRHashString("contains", this), new Integer(7));
}

public Token nextToken() throws TokenStreamException {
	Token theRetToken=null;
tryAgain:
	for (;;) {
		Token _token = null;
		int _ttype = Token.INVALID_TYPE;
		resetText();
		try {   // for char stream error handling
			try {   // for lexical error handling
				switch ( LA(1)) {
				case '\t':  case ' ':
				{
					mWS(true);
					theRetToken=_returnToken;
					break;
				}
				case '(':
				{
					mLPAREN(true);
					theRetToken=_returnToken;
					break;
				}
				case ')':
				{
					mRPAREN(true);
					theRetToken=_returnToken;
					break;
				}
				case '!':
				{
					mNEQUAL(true);
					theRetToken=_returnToken;
					break;
				}
				default:
					if ((LA(1)=='=') && (LA(2)=='=')) {
						mEEQUAL(true);
						theRetToken=_returnToken;
					}
					else if ((LA(1)=='"') && ((LA(2) >= '\u0003' && LA(2) <= '\u00ff'))) {
						mSTRING(true);
						theRetToken=_returnToken;
					}
					else if ((LA(1)=='=') && (true)) {
						mEQUAL(true);
						theRetToken=_returnToken;
					}
					else if ((LA(1)=='"') && (true)) {
						mQUOTE(true);
						theRetToken=_returnToken;
					}
					else if ((_tokenSet_0.member(LA(1)))) {
						mFIELDTYPE(true);
						theRetToken=_returnToken;
					}
				else {
					if (LA(1)==EOF_CHAR) {uponEOF(); _returnToken = makeToken(Token.EOF_TYPE);}
				else {throw new NoViableAltForCharException(LA(1), getFilename(), getLine(), getColumn());}
				}
				}
				if ( _returnToken==null ) continue tryAgain; // found SKIP token
				_ttype = _returnToken.getType();
				_returnToken.setType(_ttype);
				return _returnToken;
			}
			catch (RecognitionException e) {
				throw new TokenStreamRecognitionException(e);
			}
		}
		catch (CharStreamException cse) {
			if ( cse instanceof CharStreamIOException ) {
				throw new TokenStreamIOException(((CharStreamIOException)cse).io);
			}
			else {
				throw new TokenStreamException(cse.getMessage());
			}
		}
	}
}

	public final void mWS(boolean _createToken) throws RecognitionException, CharStreamException, TokenStreamException {
		int _ttype; Token _token=null; int _begin=text.length();
		_ttype = WS;
		
		int _saveIndex;
		
		{
		switch ( LA(1)) {
		case ' ':
		{
			match(' ');
			break;
		}
		case '\t':
		{
			match('\t');
			break;
		}
		default:
		{
			throw new NoViableAltForCharException(LA(1), getFilename(), getLine(), getColumn());
		}
		}
		}
		_ttype = Token.SKIP;
		if ( _createToken && _token==null && _ttype!=Token.SKIP ) {
			_token = makeToken(_ttype);
			_token.setText(new String(text.getBuffer(), _begin, text.length()-_begin));
		}
		_returnToken = _token;
	}
	
	public final void mLPAREN(boolean _createToken) throws RecognitionException, CharStreamException, TokenStreamException {
		int _ttype; Token _token=null; int _begin=text.length();
		_ttype = LPAREN;
		int _saveIndex;
		
		match('(');
		if ( _createToken && _token==null && _ttype!=Token.SKIP ) {
			_token = makeToken(_ttype);
			_token.setText(new String(text.getBuffer(), _begin, text.length()-_begin));
		}
		_returnToken = _token;
	}
	
	public final void mRPAREN(boolean _createToken) throws RecognitionException, CharStreamException, TokenStreamException {
		int _ttype; Token _token=null; int _begin=text.length();
		_ttype = RPAREN;
		int _saveIndex;
		
		match(')');
		if ( _createToken && _token==null && _ttype!=Token.SKIP ) {
			_token = makeToken(_ttype);
			_token.setText(new String(text.getBuffer(), _begin, text.length()-_begin));
		}
		_returnToken = _token;
	}
	
	public final void mEQUAL(boolean _createToken) throws RecognitionException, CharStreamException, TokenStreamException {
		int _ttype; Token _token=null; int _begin=text.length();
		_ttype = EQUAL;
		int _saveIndex;
		
		match("=");
		if ( _createToken && _token==null && _ttype!=Token.SKIP ) {
			_token = makeToken(_ttype);
			_token.setText(new String(text.getBuffer(), _begin, text.length()-_begin));
		}
		_returnToken = _token;
	}
	
	public final void mEEQUAL(boolean _createToken) throws RecognitionException, CharStreamException, TokenStreamException {
		int _ttype; Token _token=null; int _begin=text.length();
		_ttype = EEQUAL;
		int _saveIndex;
		
		match("==");
		if ( _createToken && _token==null && _ttype!=Token.SKIP ) {
			_token = makeToken(_ttype);
			_token.setText(new String(text.getBuffer(), _begin, text.length()-_begin));
		}
		_returnToken = _token;
	}
	
	public final void mNEQUAL(boolean _createToken) throws RecognitionException, CharStreamException, TokenStreamException {
		int _ttype; Token _token=null; int _begin=text.length();
		_ttype = NEQUAL;
		int _saveIndex;
		
		match("!=");
		if ( _createToken && _token==null && _ttype!=Token.SKIP ) {
			_token = makeToken(_ttype);
			_token.setText(new String(text.getBuffer(), _begin, text.length()-_begin));
		}
		_returnToken = _token;
	}
	
	public final void mQUOTE(boolean _createToken) throws RecognitionException, CharStreamException, TokenStreamException {
		int _ttype; Token _token=null; int _begin=text.length();
		_ttype = QUOTE;
		int _saveIndex;
		
		match('"');
		if ( _createToken && _token==null && _ttype!=Token.SKIP ) {
			_token = makeToken(_ttype);
			_token.setText(new String(text.getBuffer(), _begin, text.length()-_begin));
		}
		_returnToken = _token;
	}
	
	public final void mSTRING(boolean _createToken) throws RecognitionException, CharStreamException, TokenStreamException {
		int _ttype; Token _token=null; int _begin=text.length();
		_ttype = STRING;
		int _saveIndex;
		
		_saveIndex=text.length();
		mQUOTE(false);
		text.setLength(_saveIndex);
		{
		_loop28:
		do {
			if ((_tokenSet_1.member(LA(1)))) {
				matchNot('"');
			}
			else {
				break _loop28;
			}
			
		} while (true);
		}
		_saveIndex=text.length();
		mQUOTE(false);
		text.setLength(_saveIndex);
		if ( _createToken && _token==null && _ttype!=Token.SKIP ) {
			_token = makeToken(_ttype);
			_token.setText(new String(text.getBuffer(), _begin, text.length()-_begin));
		}
		_returnToken = _token;
	}
	
	protected final void mLETTER(boolean _createToken) throws RecognitionException, CharStreamException, TokenStreamException {
		int _ttype; Token _token=null; int _begin=text.length();
		_ttype = LETTER;
		int _saveIndex;
		
		{
		match(_tokenSet_0);
		}
		_ttype = testLiteralsTable(new String(text.getBuffer(),_begin,text.length()-_begin),_ttype);
		if ( _createToken && _token==null && _ttype!=Token.SKIP ) {
			_token = makeToken(_ttype);
			_token.setText(new String(text.getBuffer(), _begin, text.length()-_begin));
		}
		_returnToken = _token;
	}
	
	public final void mFIELDTYPE(boolean _createToken) throws RecognitionException, CharStreamException, TokenStreamException {
		int _ttype; Token _token=null; int _begin=text.length();
		_ttype = FIELDTYPE;
		int _saveIndex;
		
		{
		int _cnt33=0;
		_loop33:
		do {
			if ((_tokenSet_0.member(LA(1)))) {
				mLETTER(false);
			}
			else {
				if ( _cnt33>=1 ) { break _loop33; } else {throw new NoViableAltForCharException(LA(1), getFilename(), getLine(), getColumn());}
			}
			
			_cnt33++;
		} while (true);
		}
		_ttype = testLiteralsTable(_ttype);
		if ( _createToken && _token==null && _ttype!=Token.SKIP ) {
			_token = makeToken(_ttype);
			_token.setText(new String(text.getBuffer(), _begin, text.length()-_begin));
		}
		_returnToken = _token;
	}
	
	
	private static final long[] mk_tokenSet_0() {
		long[] data = new long[8];
		data[0]=-2305846337813348872L;
		for (int i = 1; i<=3; i++) { data[i]=-1L; }
		return data;
	}
	public static final BitSet _tokenSet_0 = new BitSet(mk_tokenSet_0());
	private static final long[] mk_tokenSet_1() {
		long[] data = new long[8];
		data[0]=-17179869192L;
		for (int i = 1; i<=3; i++) { data[i]=-1L; }
		return data;
	}
	public static final BitSet _tokenSet_1 = new BitSet(mk_tokenSet_1());
	
	}
