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// DO NOT EDIT
// Generated by JFlex 1.8.2 http://jflex.de/
// source: src/main/java/weka/core/expressionlanguage/parser/Scanner.jflex
/*
* 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 3 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, see When a lead/high surrogate has been read from the input stream into the final
* {@link #zzBuffer} position, this will have a value of 1; otherwise, it will have a value of 0.
*/
private int zzFinalHighSurrogate = 0;
/** Number of newlines encountered up to the start of the matched text. */
@SuppressWarnings("unused")
private int yyline;
/** Number of characters from the last newline up to the start of the matched text. */
@SuppressWarnings("unused")
private int yycolumn;
/** Number of characters up to the start of the matched text. */
@SuppressWarnings("unused")
private long yychar;
/** Whether the scanner is currently at the beginning of a line. */
@SuppressWarnings("unused")
private boolean zzAtBOL = true;
/** Whether the user-EOF-code has already been executed. */
@SuppressWarnings("unused")
private boolean zzEOFDone;
/* user code: */
private StringBuilder string = new StringBuilder();
private Symbol symbol(int type) {
return new Symbol(type);
}
private Symbol symbol(int type, Object obj) {
return new Symbol(type, obj);
}
/**
* Creates a new scanner
*
* @param in the java.io.Reader to read input from.
*/
public Scanner(java.io.Reader in) {
this.zzReader = in;
}
/**
* Translates raw input code points to DFA table row
*/
private static int zzCMap(int input) {
int offset = input & 255;
return offset == input ? ZZ_CMAP_BLOCKS[offset] : ZZ_CMAP_BLOCKS[ZZ_CMAP_TOP[input >> 8] | offset];
}
/**
* Refills the input buffer.
*
* @return {@code false} iff there was new input.
* @exception java.io.IOException if any I/O-Error occurs
*/
private boolean zzRefill() throws java.io.IOException {
/* first: make room (if you can) */
if (zzStartRead > 0) {
zzEndRead += zzFinalHighSurrogate;
zzFinalHighSurrogate = 0;
System.arraycopy(zzBuffer, zzStartRead,
zzBuffer, 0,
zzEndRead - zzStartRead);
/* translate stored positions */
zzEndRead -= zzStartRead;
zzCurrentPos -= zzStartRead;
zzMarkedPos -= zzStartRead;
zzStartRead = 0;
}
/* is the buffer big enough? */
if (zzCurrentPos >= zzBuffer.length - zzFinalHighSurrogate) {
/* if not: blow it up */
char newBuffer[] = new char[zzBuffer.length * 2];
System.arraycopy(zzBuffer, 0, newBuffer, 0, zzBuffer.length);
zzBuffer = newBuffer;
zzEndRead += zzFinalHighSurrogate;
zzFinalHighSurrogate = 0;
}
/* fill the buffer with new input */
int requested = zzBuffer.length - zzEndRead;
int numRead = zzReader.read(zzBuffer, zzEndRead, requested);
/* not supposed to occur according to specification of java.io.Reader */
if (numRead == 0) {
throw new java.io.IOException(
"Reader returned 0 characters. See JFlex examples/zero-reader for a workaround.");
}
if (numRead > 0) {
zzEndRead += numRead;
if (Character.isHighSurrogate(zzBuffer[zzEndRead - 1])) {
if (numRead == requested) { // We requested too few chars to encode a full Unicode character
--zzEndRead;
zzFinalHighSurrogate = 1;
} else { // There is room in the buffer for at least one more char
int c = zzReader.read(); // Expecting to read a paired low surrogate char
if (c == -1) {
return true;
} else {
zzBuffer[zzEndRead++] = (char)c;
}
}
}
/* potentially more input available */
return false;
}
/* numRead < 0 ==> end of stream */
return true;
}
/**
* Closes the input reader.
*
* @throws java.io.IOException if the reader could not be closed.
*/
public final void yyclose() throws java.io.IOException {
zzAtEOF = true; // indicate end of file
zzEndRead = zzStartRead; // invalidate buffer
if (zzReader != null) {
zzReader.close();
}
}
/**
* Resets the scanner to read from a new input stream.
*
*
Does not close the old reader.
*
*
All internal variables are reset, the old input stream cannot be reused (internal
* buffer is discarded and lost). Lexical state is set to {@code ZZ_INITIAL}.
*
*
Internal scan buffer is resized down to its initial length, if it has grown.
*
* @param reader The new input stream.
*/
public final void yyreset(java.io.Reader reader) {
zzReader = reader;
zzEOFDone = false;
yyResetPosition();
zzLexicalState = YYINITIAL;
if (zzBuffer.length > ZZ_BUFFERSIZE) {
zzBuffer = new char[ZZ_BUFFERSIZE];
}
}
/**
* Resets the input position.
*/
private final void yyResetPosition() {
zzAtBOL = true;
zzAtEOF = false;
zzCurrentPos = 0;
zzMarkedPos = 0;
zzStartRead = 0;
zzEndRead = 0;
zzFinalHighSurrogate = 0;
yyline = 0;
yycolumn = 0;
yychar = 0L;
}
/**
* Returns whether the scanner has reached the end of the reader it reads from.
*
* @return whether the scanner has reached EOF.
*/
public final boolean yyatEOF() {
return zzAtEOF;
}
/**
* Returns the current lexical state.
*
* @return the current lexical state.
*/
public final int yystate() {
return zzLexicalState;
}
/**
* Enters a new lexical state.
*
* @param newState the new lexical state
*/
public final void yybegin(int newState) {
zzLexicalState = newState;
}
/**
* Returns the text matched by the current regular expression.
*
* @return the matched text.
*/
public final String yytext() {
return new String(zzBuffer, zzStartRead, zzMarkedPos-zzStartRead);
}
/**
* Returns the character at the given position from the matched text.
*
*
It is equivalent to {@code yytext().charAt(pos)}, but faster.
*
* @param position the position of the character to fetch. A value from 0 to {@code yylength()-1}.
*
* @return the character at {@code position}.
*/
public final char yycharat(int position) {
return zzBuffer[zzStartRead + position];
}
/**
* How many characters were matched.
*
* @return the length of the matched text region.
*/
public final int yylength() {
return zzMarkedPos-zzStartRead;
}
/**
* Reports an error that occurred while scanning.
*
*
In a well-formed scanner (no or only correct usage of {@code yypushback(int)} and a
* match-all fallback rule) this method will only be called with things that
* "Can't Possibly Happen".
*
*
If this method is called, something is seriously wrong (e.g. a JFlex bug producing a faulty
* scanner etc.).
*
*
Usual syntax/scanner level error handling should be done in error fallback rules.
*
* @param errorCode the code of the error message to display.
*/
private static void zzScanError(int errorCode) throws SyntaxException {
String message;
try {
message = ZZ_ERROR_MSG[errorCode];
} catch (ArrayIndexOutOfBoundsException e) {
message = ZZ_ERROR_MSG[ZZ_UNKNOWN_ERROR];
}
throw new SyntaxException(message);
}
/**
* Pushes the specified amount of characters back into the input stream.
*
*
They will be read again by then next call of the scanning method.
*
* @param number the number of characters to be read again. This number must not be greater than
* {@link #yylength()}.
*/
public void yypushback(int number) throws SyntaxException {
if ( number > yylength() )
zzScanError(ZZ_PUSHBACK_2BIG);
zzMarkedPos -= number;
}
/**
* Resumes scanning until the next regular expression is matched, the end of input is encountered
* or an I/O-Error occurs.
*
* @return the next token.
* @exception java.io.IOException if any I/O-Error occurs.
*/
@Override public java_cup.runtime.Symbol next_token() throws java.io.IOException, SyntaxException {
int zzInput;
int zzAction;
// cached fields:
int zzCurrentPosL;
int zzMarkedPosL;
int zzEndReadL = zzEndRead;
char[] zzBufferL = zzBuffer;
int [] zzTransL = ZZ_TRANS;
int [] zzRowMapL = ZZ_ROWMAP;
int [] zzAttrL = ZZ_ATTRIBUTE;
while (true) {
zzMarkedPosL = zzMarkedPos;
zzAction = -1;
zzCurrentPosL = zzCurrentPos = zzStartRead = zzMarkedPosL;
zzState = ZZ_LEXSTATE[zzLexicalState];
// set up zzAction for empty match case:
int zzAttributes = zzAttrL[zzState];
if ( (zzAttributes & 1) == 1 ) {
zzAction = zzState;
}
zzForAction: {
while (true) {
if (zzCurrentPosL < zzEndReadL) {
zzInput = Character.codePointAt(zzBufferL, zzCurrentPosL, zzEndReadL);
zzCurrentPosL += Character.charCount(zzInput);
}
else if (zzAtEOF) {
zzInput = YYEOF;
break zzForAction;
}
else {
// store back cached positions
zzCurrentPos = zzCurrentPosL;
zzMarkedPos = zzMarkedPosL;
boolean eof = zzRefill();
// get translated positions and possibly new buffer
zzCurrentPosL = zzCurrentPos;
zzMarkedPosL = zzMarkedPos;
zzBufferL = zzBuffer;
zzEndReadL = zzEndRead;
if (eof) {
zzInput = YYEOF;
break zzForAction;
}
else {
zzInput = Character.codePointAt(zzBufferL, zzCurrentPosL, zzEndReadL);
zzCurrentPosL += Character.charCount(zzInput);
}
}
int zzNext = zzTransL[ zzRowMapL[zzState] + zzCMap(zzInput) ];
if (zzNext == -1) break zzForAction;
zzState = zzNext;
zzAttributes = zzAttrL[zzState];
if ( (zzAttributes & 1) == 1 ) {
zzAction = zzState;
zzMarkedPosL = zzCurrentPosL;
if ( (zzAttributes & 8) == 8 ) break zzForAction;
}
}
}
// store back cached position
zzMarkedPos = zzMarkedPosL;
if (zzInput == YYEOF && zzStartRead == zzCurrentPos) {
zzAtEOF = true;
{ return new java_cup.runtime.Symbol(sym.EOF); }
}
else {
switch (zzAction < 0 ? zzAction : ZZ_ACTION[zzAction]) {
case 1:
{ throw new SyntaxException("Illegal character " + yytext() + "!");
}
// fall through
case 38: break;
case 2:
{ /* ignore */
}
// fall through
case 39: break;
case 3:
{ return symbol(sym.NOT);
}
// fall through
case 40: break;
case 4:
{ yybegin(STRING1); string.setLength(0);
}
// fall through
case 41: break;
case 5:
{ return symbol(sym.AND);
}
// fall through
case 42: break;
case 6:
{ yybegin(STRING2); string.setLength(0);
}
// fall through
case 43: break;
case 7:
{ return symbol(sym.LPAREN);
}
// fall through
case 44: break;
case 8:
{ return symbol(sym.RPAREN);
}
// fall through
case 45: break;
case 9:
{ return symbol(sym.TIMES);
}
// fall through
case 46: break;
case 10:
{ return symbol(sym.PLUS);
}
// fall through
case 47: break;
case 11:
{ return symbol(sym.COMMA);
}
// fall through
case 48: break;
case 12:
{ return symbol(sym.MINUS);
}
// fall through
case 49: break;
case 13:
{ return symbol(sym.DIVISION);
}
// fall through
case 50: break;
case 14:
{ return symbol(sym.FLOAT, Double.valueOf(yytext()));
}
// fall through
case 51: break;
case 15:
{ return symbol(sym.LT);
}
// fall through
case 52: break;
case 16:
{ return symbol(sym.EQUAL);
}
// fall through
case 53: break;
case 17:
{ return symbol(sym.GT);
}
// fall through
case 54: break;
case 18:
{ return symbol(sym.IDENTIFIER, yytext());
}
// fall through
case 55: break;
case 19:
{ return symbol(sym.POW);
}
// fall through
case 56: break;
case 20:
{ return symbol(sym.OR);
}
// fall through
case 57: break;
case 21:
{ string.append(yytext());
}
// fall through
case 58: break;
case 22:
{ yybegin(YYINITIAL); return symbol(sym.STRING, string.toString());
}
// fall through
case 59: break;
case 23:
{ return symbol(sym.LE);
}
// fall through
case 60: break;
case 24:
{ return symbol(sym.GE);
}
// fall through
case 61: break;
case 25:
{ return symbol(sym.IS);
}
// fall through
case 62: break;
case 26:
{ throw new SyntaxException("Invalid escape sequence '" + yytext() + "'!");
}
// fall through
case 63: break;
case 27:
{ string.append('\"');
}
// fall through
case 64: break;
case 28:
{ string.append('\'');
}
// fall through
case 65: break;
case 29:
{ string.append('\\');
}
// fall through
case 66: break;
case 30:
{ string.append('\b');
}
// fall through
case 67: break;
case 31:
{ string.append('\f');
}
// fall through
case 68: break;
case 32:
{ string.append('\n');
}
// fall through
case 69: break;
case 33:
{ string.append('\r');
}
// fall through
case 70: break;
case 34:
{ string.append('\t');
}
// fall through
case 71: break;
case 35:
{ return symbol(sym.BOOLEAN, true);
}
// fall through
case 72: break;
case 36:
{ return symbol(sym.BOOLEAN, false);
}
// fall through
case 73: break;
case 37:
{ return symbol(sym.REGEXP);
}
// fall through
case 74: break;
default:
zzScanError(ZZ_NO_MATCH);
}
}
}
}
}