Package org.fife.rsta.ac.java.rjc.lexer

Class SourceCodeScanner

java.lang.Object
org.fife.rsta.ac.java.rjc.lexer.SourceCodeScanner
All Implemented Interfaces:
TokenTypes
class SourceCodeScanner extends Object implements TokenTypes
Scanner for the Java programming language.

Version:
0.1

  • Field Details

    • YYEOF

      public static final int YYEOF
      This character denotes the end of file
      See Also:

    • ZZ_BUFFERSIZE

      private static final int ZZ_BUFFERSIZE
      initial size of the lookahead buffer
      See Also:

    • YYINITIAL

      public static final int YYINITIAL
      lexical states
      See Also:

    • ZZ_CMAP_PACKED

      private static final String ZZ_CMAP_PACKED
      Translates characters to character classes
      See Also:

    • ZZ_CMAP

      private static final char[] ZZ_CMAP
      Translates characters to character classes

    • ZZ_ACTION

      private static final int[] ZZ_ACTION
      Translates DFA states to action switch labels.

    • ZZ_ACTION_PACKED_0

      private static final String ZZ_ACTION_PACKED_0
      See Also:

    • ZZ_ROWMAP

      private static final int[] ZZ_ROWMAP
      Translates a state to a row index in the transition table

    • ZZ_ROWMAP_PACKED_0

      private static final String ZZ_ROWMAP_PACKED_0
      See Also:

    • ZZ_TRANS

      private static final int[] ZZ_TRANS
      The transition table of the DFA

    • ZZ_TRANS_PACKED_0

      private static final String ZZ_TRANS_PACKED_0
      See Also:

    • ZZ_UNKNOWN_ERROR

      private static final int ZZ_UNKNOWN_ERROR
      See Also:

    • ZZ_NO_MATCH

      private static final int ZZ_NO_MATCH
      See Also:

    • ZZ_PUSHBACK_2BIG

      private static final int ZZ_PUSHBACK_2BIG
      See Also:

    • ZZ_ERROR_MSG

      private static final String[] ZZ_ERROR_MSG

    • ZZ_ATTRIBUTE

      private static final int[] ZZ_ATTRIBUTE
      ZZ_ATTRIBUTE[aState] contains the attributes of state aState

    • ZZ_ATTRIBUTE_PACKED_0

      private static final String ZZ_ATTRIBUTE_PACKED_0
      See Also:

    • zzReader

      private Reader zzReader
      the input device

    • zzState

      private int zzState
      the current state of the DFA

    • zzLexicalState

      private int zzLexicalState
      the current lexical state

    • zzBuffer

      private char[] zzBuffer
      this buffer contains the current text to be matched and is the source of the yytext() string

    • zzMarkedPos

      private int zzMarkedPos
      the textposition at the last accepting state

    • zzCurrentPos

      private int zzCurrentPos
      the current text position in the buffer

    • zzStartRead

      private int zzStartRead
      startRead marks the beginning of the yytext() string in the buffer

    • zzEndRead

      private int zzEndRead
      endRead marks the last character in the buffer, that has been read from input

    • yyline

      private int yyline
      number of newlines encountered up to the start of the matched text

    • yychar

      private int yychar
      the number of characters up to the start of the matched text

    • yycolumn

      private int yycolumn
      the number of characters from the last newline up to the start of the matched text

    • zzAtEOF

      private boolean zzAtEOF
      zzAtEOF == true invalid input: '<'=> the scanner is at the EOF

    • returnComments

      private boolean returnComments
      Whether comments should be returned as tokens.

    • returnWhitespace

      private boolean returnWhitespace
      Whether whitespace should be returned as tokens.

    • keepLastDocComment

      private boolean keepLastDocComment
      Whether the last documentation comment parsed should be kept.

    • lastDocComment

      private String lastDocComment
      The last documentation comment parsed, if that feature is enabled.

  • Constructor Details

    • SourceCodeScanner

      SourceCodeScanner(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.

    • SourceCodeScanner

      SourceCodeScanner(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.

  • Method Details

    • zzUnpackAction

      private static int[] zzUnpackAction()

    • zzUnpackAction

      private static int zzUnpackAction(String packed, int offset, int[] result)

    • zzUnpackRowMap

      private static int[] zzUnpackRowMap()

    • zzUnpackRowMap

      private static int zzUnpackRowMap(String packed, int offset, int[] result)

    • zzUnpackTrans

      private static int[] zzUnpackTrans()

    • zzUnpackTrans

      private static int zzUnpackTrans(String packed, int offset, int[] result)

    • zzUnpackAttribute

      private static int[] zzUnpackAttribute()

    • zzUnpackAttribute

      private static int zzUnpackAttribute(String packed, int offset, int[] result)

    • createToken

      private Token createToken(int type)

    • createToken

      private Token createToken(int type, boolean invalid)

    • getColumn

      public int getColumn()
      Returns the current column into the current line.
      Returns:
      The current column.

    • getLastDocComment

      public String getLastDocComment()
      Returns the last documentation comment parsed, if this feature is enabled. The "last documentation comment" is cleared when this method returns.
      Returns:
      The last documentation comment parsed, or null if the feature is disabled.
      See Also:

    • getLine

      public int getLine()
      Returns the current line into the document.
      Returns:
      The current line.

    • getOffset

      public int getOffset()
      Returns the current offset into the document.
      Returns:
      The offset.

    • getReturnComments

      public boolean getReturnComments()
      Returns whether comments are returned as tokens.
      Returns:
      Whether comments are returned as tokens.
      See Also:

    • getReturnWhitespace

      public boolean getReturnWhitespace()
      Returns whether whitespace is returned as tokens.
      Returns:
      Whether whitespace is returned as tokens.
      See Also:

    • setKeepLastDocComment

      public void setKeepLastDocComment(boolean keep)
      Sets whether the last documentation comment should be kept.
      Parameters:
      keep - Whether to keep the last documentation comment.
      See Also:

    • setReturnComments

      public void setReturnComments(boolean returnComments)
      Sets whether comments are returned as tokens.
      Parameters:
      returnComments - Whether comments should be returned as tokens.
      See Also:

    • setReturnWhitespace

      public void setReturnWhitespace(boolean returnWhitespace)
      Sets whether whitespace is returned as tokens.
      Parameters:
      returnWhitespace - Whether whitespace should be returned as tokens.
      See Also:

    • zzUnpackCMap

      private static char[] zzUnpackCMap(String packed)
      Unpacks the compressed character translation table.
      Parameters:
      packed - the packed character translation table
      Returns:
      the unpacked character translation table

    • zzRefill

      private boolean zzRefill() throws IOException
      Refills the input buffer.
      Returns:
      false, iff there was new input.
      Throws:
      IOException - if any I/O-Error occurs

    • yyclose

      public final void yyclose() throws IOException
      Closes the input stream.
      Throws:
      IOException

    • yyreset

      public final void yyreset(Reader reader)
      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

    • 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

    • yytext

      public final String 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

    • 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

    • 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()!

    • yylex

      public Token yylex() throws IOException
      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 occurs