com.ovea.tajin.json.Yylex Maven / Gradle / Ivy
/**
* Copyright (C) 2011 Ovea
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.ovea.tajin.json;
import java.io.IOException;
/**
* @author Mathieu Carbou ([email protected])
*/
final class Yylex {
/**
* This character denotes the end of file
*/
public static final int YYEOF = -1;
/**
* initial size of the lookahead buffer
*/
private static final int ZZ_BUFFERSIZE = 16384;
/**
* lexical states
*/
public static final int YYINITIAL = 0;
public static final int STRING_BEGIN = 2;
/**
* ZZ_LEXSTATE[l] is the state in the DFA for the lexical state l
* ZZ_LEXSTATE[l+1] is the state in the DFA for the lexical state l
* at the beginning of a line
* l is of the form l = 2*k, k a non negative integer
*/
private static final int ZZ_LEXSTATE[] = {
0, 0, 1, 1
};
/**
* Translates characters to character classes
*/
private static final String ZZ_CMAP_PACKED =
"\11\0\2\7\2\0\1\7\22\0\1\7\1\0\1\11\10\0\1\6" +
"\1\31\1\2\1\4\1\12\12\3\1\32\6\0\4\1\1\5\1\1" +
"\24\0\1\27\1\10\1\30\3\0\1\22\1\13\2\1\1\21\1\14" +
"\5\0\1\23\1\0\1\15\3\0\1\16\1\24\1\17\1\20\5\0" +
"\1\25\1\0\1\26\uff82\0";
/**
* Translates characters to character classes
*/
private static final char[] ZZ_CMAP = zzUnpackCMap(ZZ_CMAP_PACKED);
/**
* Translates DFA states to action switch labels.
*/
private static final int[] ZZ_ACTION = zzUnpackAction();
private static final String ZZ_ACTION_PACKED_0 =
"\3\0\1\1\1\2\1\3\3\0\1\4\1\5\1\6" +
"\1\7\1\10\1\11\1\12\1\0\1\13\5\0\1\14" +
"\1\15\1\16\1\17\1\20\1\21\1\22\1\23\1\0" +
"\1\24\1\0\1\24\4\0\1\25\1\26\2\0\1\27";
private static int[] zzUnpackAction() {
int[] result = new int[44];
int offset = 0;
offset = zzUnpackAction(ZZ_ACTION_PACKED_0, offset, result);
return result;
}
private static int zzUnpackAction(String packed, int offset, int[] result) {
int i = 0; /* index in packed string */
int j = offset; /* index in unpacked array */
int l = packed.length();
while (i < l) {
int count = packed.charAt(i++);
int value = packed.charAt(i++);
do result[j++] = value; while (--count > 0);
}
return j;
}
/* error codes */
private static final int ZZ_UNKNOWN_ERROR = 0;
private static final int ZZ_NO_MATCH = 1;
private static final int ZZ_PUSHBACK_2BIG = 2;
/* error messages for the codes above */
private static final String ZZ_ERROR_MSG[] = {
"Unkown internal scanner error",
"Error: could not match input",
"Error: pushback value was too large"
};
/**
* the input device
*/
private java.io.Reader zzReader;
/**
* the current state of the DFA
*/
private int zzState;
/**
* the current lexical state
*/
private int zzLexicalState = YYINITIAL;
/**
* this buffer contains the current text to be matched and is
* the source of the yytext() string
*/
private char zzBuffer[] = new char[ZZ_BUFFERSIZE];
/**
* the textposition at the last accepting state
*/
private int zzMarkedPos;
/**
* the current text position in the buffer
*/
private int zzCurrentPos;
/**
* startRead marks the beginning of the yytext() string in the buffer
*/
private int zzStartRead;
/**
* endRead marks the last character in the buffer, that has been read
* from input
*/
private int zzEndRead;
/**
* number of newlines encountered up to the start of the matched text
*/
private int yyline;
/**
* the number of characters up to the start of the matched text
*/
private int yychar;
/**
* the number of characters from the last newline up to the start of the
* matched text
*/
private int yycolumn;
/**
* zzAtBOL == true <=> the scanner is currently at the beginning of a line
*/
private boolean zzAtBOL = true;
/**
* zzAtEOF == true <=> the scanner is at the EOF
*/
private boolean zzAtEOF;
/* user code: */
private StringBuffer sb = new StringBuffer();
/**
* Creates a new scanner
* There is also a java.io.InputStream version of this constructor.
*
* @param in the java.io.Reader to read input from.
*/
Yylex(java.io.Reader in) {
this.zzReader = in;
}
/**
* Creates a new scanner.
* There is also java.io.Reader version of this constructor.
*
* @param in the java.io.Inputstream to read input from.
*/
Yylex(java.io.InputStream in) {
this(new java.io.InputStreamReader(in));
}
/**
* Unpacks the compressed character translation table.
*
* @param packed the packed character translation table
* @return the unpacked character translation table
*/
private static char[] zzUnpackCMap(String packed) {
char[] map = new char[0x10000];
int i = 0; /* index in packed string */
int j = 0; /* index in unpacked array */
while (i < 88) {
int count = packed.charAt(i++);
char value = packed.charAt(i++);
do map[j++] = value; while (--count > 0);
}
return map;
}
/**
* Refills the input buffer.
*
* @return false, iff there was new input.
* @throws java.io.IOException if any I/O-Error occurs
*/
private boolean zzRefill() throws IOException {
/* first: make room (if you can) */
if (zzStartRead > 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) {
/* if not: blow it up */
char newBuffer[] = new char[zzCurrentPos * 2];
System.arraycopy(zzBuffer, 0, newBuffer, 0, zzBuffer.length);
zzBuffer = newBuffer;
}
/* finally: fill the buffer with new input */
int numRead = zzReader.read(zzBuffer, zzEndRead,
zzBuffer.length - zzEndRead);
if (numRead > 0) {
zzEndRead += numRead;
return false;
}
// unlikely but not impossible: read 0 characters, but not at end of stream
if (numRead == 0) {
int c = zzReader.read();
if (c == -1) {
return true;
} else {
zzBuffer[zzEndRead++] = (char) c;
return false;
}
}
// numRead < 0
return true;
}
/**
* Closes the input stream.
*/
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 ZZ_INITIAL.
*
* @param reader the new input stream
*/
public final void yyreset(java.io.Reader reader) {
zzReader = reader;
zzAtBOL = true;
zzAtEOF = false;
zzEndRead = zzStartRead = 0;
zzCurrentPos = zzMarkedPos = 0;
yyline = yychar = yycolumn = 0;
zzLexicalState = YYINITIAL;
}
/**
* Returns 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.
*/
public final String yytext() {
return new String(zzBuffer, zzStartRead, zzMarkedPos - zzStartRead);
}
/**
* Returns the character at position pos from the
* matched text.
*
* It is equivalent to yytext().charAt(pos), but faster
*
* @param pos the position of the character to fetch.
* A value from 0 to yylength()-1.
* @return the character at position pos
*/
public final char yycharat(int pos) {
return zzBuffer[zzStartRead + pos];
}
/**
* Returns the length of the matched text region.
*/
public final int yylength() {
return zzMarkedPos - zzStartRead;
}
/**
* Reports an error that occured while scanning.
*
* In a wellformed scanner (no or only correct usage of
* 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 errormessage to display
*/
private void zzScanError(int errorCode) {
String message;
try {
message = ZZ_ERROR_MSG[errorCode];
} catch (ArrayIndexOutOfBoundsException e) {
message = ZZ_ERROR_MSG[ZZ_UNKNOWN_ERROR];
}
throw new Error(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 yylength()!
*/
public void yypushback(int number) {
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
* @throws java.io.IOException if any I/O-Error occurs
*/
public Yytoken yylex() throws IOException {
int zzInput;
int zzAction;
// cached fields:
int zzCurrentPosL;
int zzMarkedPosL;
int zzEndReadL = zzEndRead;
char[] zzBufferL = zzBuffer;
char[] zzCMapL = ZZ_CMAP;
while (true) {
zzMarkedPosL = zzMarkedPos;
zzAction = -1;
zzCurrentPosL = zzCurrentPos = zzStartRead = zzMarkedPosL;
zzState = ZZ_LEXSTATE[zzLexicalState];
zzForAction:
{
while (true) {
if (zzCurrentPosL < zzEndReadL)
zzInput = zzBufferL[zzCurrentPosL++];
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 = zzBufferL[zzCurrentPosL++];
}
}
zzInput = zzCMapL[zzInput];
boolean zzIsFinal = false;
boolean zzNoLookAhead = false;
zzForNext:
{
switch (zzState) {
case 0:
switch (zzInput) {
case 2:
zzState = 2;
break zzForNext;
case 3:
zzIsFinal = true;
zzState = 3;
break zzForNext;
case 7:
zzIsFinal = true;
zzState = 4;
break zzForNext;
case 9:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 5;
break zzForNext;
case 12:
zzState = 6;
break zzForNext;
case 13:
zzState = 7;
break zzForNext;
case 15:
zzState = 8;
break zzForNext;
case 21:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 9;
break zzForNext;
case 22:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 10;
break zzForNext;
case 23:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 11;
break zzForNext;
case 24:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 12;
break zzForNext;
case 25:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 13;
break zzForNext;
case 26:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 14;
break zzForNext;
default:
break zzForAction;
}
case 1:
switch (zzInput) {
case 8:
zzState = 16;
break zzForNext;
case 9:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 17;
break zzForNext;
default:
zzIsFinal = true;
zzState = 15;
break zzForNext;
}
case 2:
switch (zzInput) {
case 3:
zzIsFinal = true;
zzState = 3;
break zzForNext;
default:
break zzForAction;
}
case 3:
switch (zzInput) {
case 3:
zzIsFinal = true;
break zzForNext;
case 4:
zzState = 18;
break zzForNext;
case 5:
case 17:
zzState = 19;
break zzForNext;
default:
break zzForAction;
}
case 4:
switch (zzInput) {
case 7:
zzIsFinal = true;
break zzForNext;
default:
break zzForAction;
}
case 6:
switch (zzInput) {
case 18:
zzState = 20;
break zzForNext;
default:
break zzForAction;
}
case 7:
switch (zzInput) {
case 16:
zzState = 21;
break zzForNext;
default:
break zzForAction;
}
case 8:
switch (zzInput) {
case 14:
zzState = 22;
break zzForNext;
default:
break zzForAction;
}
case 15:
switch (zzInput) {
case 8:
case 9:
break zzForAction;
default:
zzIsFinal = true;
break zzForNext;
}
case 16:
switch (zzInput) {
case 8:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 23;
break zzForNext;
case 9:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 24;
break zzForNext;
case 10:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 25;
break zzForNext;
case 11:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 26;
break zzForNext;
case 12:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 27;
break zzForNext;
case 13:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 28;
break zzForNext;
case 14:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 29;
break zzForNext;
case 15:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 30;
break zzForNext;
case 16:
zzState = 31;
break zzForNext;
default:
break zzForAction;
}
case 18:
switch (zzInput) {
case 3:
zzIsFinal = true;
zzState = 32;
break zzForNext;
default:
break zzForAction;
}
case 19:
switch (zzInput) {
case 2:
case 6:
zzState = 33;
break zzForNext;
case 3:
zzIsFinal = true;
zzState = 34;
break zzForNext;
default:
break zzForAction;
}
case 20:
switch (zzInput) {
case 19:
zzState = 35;
break zzForNext;
default:
break zzForAction;
}
case 21:
switch (zzInput) {
case 19:
zzState = 36;
break zzForNext;
default:
break zzForAction;
}
case 22:
switch (zzInput) {
case 16:
zzState = 37;
break zzForNext;
default:
break zzForAction;
}
case 31:
switch (zzInput) {
case 1:
case 3:
case 5:
case 11:
case 12:
case 17:
case 18:
zzState = 38;
break zzForNext;
default:
break zzForAction;
}
case 32:
switch (zzInput) {
case 5:
case 17:
zzState = 19;
break zzForNext;
case 3:
zzIsFinal = true;
break zzForNext;
default:
break zzForAction;
}
case 33:
switch (zzInput) {
case 3:
zzIsFinal = true;
zzState = 34;
break zzForNext;
default:
break zzForAction;
}
case 34:
switch (zzInput) {
case 3:
zzIsFinal = true;
break zzForNext;
default:
break zzForAction;
}
case 35:
switch (zzInput) {
case 20:
zzState = 37;
break zzForNext;
default:
break zzForAction;
}
case 36:
switch (zzInput) {
case 19:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 39;
break zzForNext;
default:
break zzForAction;
}
case 37:
switch (zzInput) {
case 17:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 40;
break zzForNext;
default:
break zzForAction;
}
case 38:
switch (zzInput) {
case 1:
case 3:
case 5:
case 11:
case 12:
case 17:
case 18:
zzState = 41;
break zzForNext;
default:
break zzForAction;
}
case 41:
switch (zzInput) {
case 1:
case 3:
case 5:
case 11:
case 12:
case 17:
case 18:
zzState = 42;
break zzForNext;
default:
break zzForAction;
}
case 42:
switch (zzInput) {
case 1:
case 3:
case 5:
case 11:
case 12:
case 17:
case 18:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 43;
break zzForNext;
default:
break zzForAction;
}
default:
// if this is ever reached, there is a serious bug in JFlex
zzScanError(ZZ_UNKNOWN_ERROR);
break;
}
}
if (zzIsFinal) {
zzAction = zzState;
zzMarkedPosL = zzCurrentPosL;
if (zzNoLookAhead) break zzForAction;
}
}
}
// store back cached position
zzMarkedPos = zzMarkedPosL;
switch (zzAction < 0 ? zzAction : ZZ_ACTION[zzAction]) {
case 10: {
sb.append(yytext());
}
case 24:
break;
case 3: {
sb.delete(0, sb.length());
yybegin(STRING_BEGIN);
}
case 25:
break;
case 15: {
sb.append('\b');
}
case 26:
break;
case 5: {
return new Yytoken(Yytoken.TYPE_RIGHT_BRACE, null);
}
case 27:
break;
case 12: {
sb.append('\\');
}
case 28:
break;
case 20: {
Double val = Double.valueOf(yytext());
return new Yytoken(Yytoken.TYPE_VALUE, val);
}
case 29:
break;
case 1: {
Long val = Long.valueOf(yytext());
return new Yytoken(Yytoken.TYPE_VALUE, val);
}
case 30:
break;
case 7: {
return new Yytoken(Yytoken.TYPE_RIGHT_SQUARE, null);
}
case 31:
break;
case 18: {
sb.append('\r');
}
case 32:
break;
case 21: {
return new Yytoken(Yytoken.TYPE_VALUE, null);
}
case 33:
break;
case 14: {
sb.append('/');
}
case 34:
break;
case 9: {
return new Yytoken(Yytoken.TYPE_COLON, null);
}
case 35:
break;
case 11: {
yybegin(YYINITIAL);
return new Yytoken(Yytoken.TYPE_VALUE, sb.toString());
}
case 36:
break;
case 13: {
sb.append('"');
}
case 37:
break;
case 4: {
return new Yytoken(Yytoken.TYPE_LEFT_BRACE, null);
}
case 38:
break;
case 16: {
sb.append('\f');
}
case 39:
break;
case 19: {
sb.append('\t');
}
case 40:
break;
case 6: {
return new Yytoken(Yytoken.TYPE_LEFT_SQUARE, null);
}
case 41:
break;
case 23: {
int ch = Integer.parseInt(yytext().substring(2), 16);
sb.append((char) ch);
}
case 42:
break;
case 22: {
Boolean val = Boolean.valueOf(yytext());
return new Yytoken(Yytoken.TYPE_VALUE, val);
}
case 43:
break;
case 17: {
sb.append('\n');
}
case 44:
break;
case 8: {
return new Yytoken(Yytoken.TYPE_COMMA, null);
}
case 45:
break;
case 2: {
}
case 46:
break;
default:
if (zzInput == YYEOF && zzStartRead == zzCurrentPos) {
zzAtEOF = true;
return null;
} else {
zzScanError(ZZ_NO_MATCH);
}
}
}
}
}
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