Package org.json.simple.parser
Class Yylex
java.lang.Object
org.json.simple.parser.Yylex
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate StringBuffer
static final int
private int
the number of characters up to the start of the matched textprivate int
the number of characters from the last newline up to the start of the matched textstatic final int
This character denotes the end of filestatic final int
lexical statesprivate int
number of newlines encountered up to the start of the matched textprivate static final int[]
Translates DFA states to action switch labels.private static final String
private static final int[]
ZZ_ATTRIBUTE[aState] contains the attributes of stateaState
private static final String
private static final int
initial size of the lookahead bufferprivate static final char[]
Translates characters to character classesprivate static final String
Translates characters to character classesprivate static final String[]
private static final int[]
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 integerprivate static final int
private static final int
private static final int[]
Translates a state to a row index in the transition tableprivate static final String
private static final int[]
The transition table of the DFAprivate static final int
private boolean
zzAtBOL == true invalid input: '<'=> the scanner is currently at the beginning of a lineprivate boolean
zzAtEOF == true invalid input: '<'=> the scanner is at the EOFprivate char[]
this buffer contains the current text to be matched and is the source of the yytext() stringprivate int
the current text position in the bufferprivate int
endRead marks the last character in the buffer, that has been read from inputprivate int
the current lexical stateprivate int
the textposition at the last accepting stateprivate Reader
the input deviceprivate int
startRead marks the beginning of the yytext() string in the bufferprivate int
the current state of the DFA -
Constructor Summary
ConstructorsConstructorDescriptionYylex
(InputStream in) Creates a new scanner.Creates a new scanner There is also a java.io.InputStream version of this constructor. -
Method Summary
Modifier and TypeMethodDescription(package private) int
final void
yybegin
(int newState) Enters a new lexical statefinal char
yycharat
(int pos) Returns the character at position pos from the matched text.final void
yyclose()
Closes the input stream.final int
yylength()
Returns the length of the matched text region.yylex()
Resumes scanning until the next regular expression is matched, the end of input is encountered or an I/O-Error occurs.void
yypushback
(int number) Pushes the specified amount of characters back into the input stream.final void
Resets the scanner to read from a new input stream.final int
yystate()
Returns the current lexical state.final String
yytext()
Returns the text matched by the current regular expression.private boolean
zzRefill()
Refills the input buffer.private void
zzScanError
(int errorCode) Reports an error that occured while scanning.private static int[]
private static int
zzUnpackAction
(String packed, int offset, int[] result) private static int[]
private static int
zzUnpackAttribute
(String packed, int offset, int[] result) private static char[]
zzUnpackCMap
(String packed) Unpacks the compressed character translation table.private static int[]
private static int
zzUnpackRowMap
(String packed, int offset, int[] result)
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Field Details
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YYEOF
public static final int YYEOFThis character denotes the end of file- See Also:
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ZZ_BUFFERSIZE
private static final int ZZ_BUFFERSIZEinitial size of the lookahead buffer- See Also:
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YYINITIAL
public static final int YYINITIALlexical states- See Also:
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STRING_BEGIN
public static final int STRING_BEGIN- See Also:
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ZZ_LEXSTATE
private static final int[] ZZ_LEXSTATEZZ_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 -
ZZ_CMAP_PACKED
Translates characters to character classes- See Also:
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ZZ_CMAP
private static final char[] ZZ_CMAPTranslates characters to character classes -
ZZ_ACTION
private static final int[] ZZ_ACTIONTranslates DFA states to action switch labels. -
ZZ_ACTION_PACKED_0
- See Also:
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ZZ_ROWMAP
private static final int[] ZZ_ROWMAPTranslates a state to a row index in the transition table -
ZZ_ROWMAP_PACKED_0
- See Also:
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ZZ_TRANS
private static final int[] ZZ_TRANSThe transition table of the DFA -
ZZ_UNKNOWN_ERROR
private static final int ZZ_UNKNOWN_ERROR- See Also:
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ZZ_NO_MATCH
private static final int ZZ_NO_MATCH- See Also:
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ZZ_PUSHBACK_2BIG
private static final int ZZ_PUSHBACK_2BIG- See Also:
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ZZ_ERROR_MSG
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ZZ_ATTRIBUTE
private static final int[] ZZ_ATTRIBUTEZZ_ATTRIBUTE[aState] contains the attributes of stateaState
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ZZ_ATTRIBUTE_PACKED_0
- See Also:
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zzReader
the input device -
zzState
private int zzStatethe current state of the DFA -
zzLexicalState
private int zzLexicalStatethe current lexical state -
zzBuffer
private char[] zzBufferthis buffer contains the current text to be matched and is the source of the yytext() string -
zzMarkedPos
private int zzMarkedPosthe textposition at the last accepting state -
zzCurrentPos
private int zzCurrentPosthe current text position in the buffer -
zzStartRead
private int zzStartReadstartRead marks the beginning of the yytext() string in the buffer -
zzEndRead
private int zzEndReadendRead marks the last character in the buffer, that has been read from input -
yyline
private int yylinenumber of newlines encountered up to the start of the matched text -
yychar
private int yycharthe number of characters up to the start of the matched text -
yycolumn
private int yycolumnthe number of characters from the last newline up to the start of the matched text -
zzAtBOL
private boolean zzAtBOLzzAtBOL == true invalid input: '<'=> the scanner is currently at the beginning of a line -
zzAtEOF
private boolean zzAtEOFzzAtEOF == true invalid input: '<'=> the scanner is at the EOF -
sb
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Constructor Details
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Yylex
Yylex(Reader in) Creates a new scanner There is also a java.io.InputStream version of this constructor.- Parameters:
in
- the java.io.Reader to read input from.
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Yylex
Yylex(InputStream in) Creates a new scanner. There is also java.io.Reader version of this constructor.- Parameters:
in
- the java.io.Inputstream to read input from.
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Method Details
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zzUnpackAction
private static int[] zzUnpackAction() -
zzUnpackAction
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zzUnpackRowMap
private static int[] zzUnpackRowMap() -
zzUnpackRowMap
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zzUnpackAttribute
private static int[] zzUnpackAttribute() -
zzUnpackAttribute
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getPosition
int getPosition() -
zzUnpackCMap
Unpacks the compressed character translation table.- Parameters:
packed
- the packed character translation table- Returns:
- the unpacked character translation table
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zzRefill
Refills the input buffer.- Returns:
false
, iff there was new input.- Throws:
IOException
- if any I/O-Error occurs
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yyclose
Closes the input stream.- Throws:
IOException
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yyreset
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.- Parameters:
reader
- the new input stream
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yystate
public final int yystate()Returns the current lexical state. -
yybegin
public final void yybegin(int newState) Enters a new lexical state- Parameters:
newState
- the new lexical state
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yytext
Returns the text matched by the current regular expression. -
yycharat
public final char yycharat(int pos) Returns the character at position pos from the matched text. It is equivalent to yytext().charAt(pos), but faster- Parameters:
pos
- the position of the character to fetch. A value from 0 to yylength()-1.- Returns:
- the character at position pos
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yylength
public final int yylength()Returns the length of the matched text region. -
zzScanError
private void zzScanError(int errorCode) 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.- Parameters:
errorCode
- the code of the errormessage to display
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yypushback
public void yypushback(int number) Pushes the specified amount of characters back into the input stream. They will be read again by then next call of the scanning method- Parameters:
number
- the number of characters to be read again. This number must not be greater than yylength()!
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yylex
Resumes scanning until the next regular expression is matched, the end of input is encountered or an I/O-Error occurs.- Returns:
- the next token
- Throws:
IOException
- if any I/O-Error occursParseException
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