org.jrubyparser.lexer
Class ReaderLexerSource

java.lang.Object
  org.jrubyparser.lexer.LexerSource
      org.jrubyparser.lexer.ReaderLexerSource

public class ReaderLexerSource
extends LexerSource

Field Summary

Fields inherited from class org.jrubyparser.lexer.LexerSource

line, offset

Constructor Summary

ReaderLexerSource(String sourceName, Reader in, int line)
Create our food-source for the lexer

Method Summary

int	chompReadAhead()
static LexerSource	getSource(String name, Reader content, ParserConfiguration configuration) Create a source.
boolean	isANewLine()
boolean	lastWasBeginOfLine()
boolean	matchMarker(String match, boolean indent, boolean checkNewline) Match marker against input consumering lexer source as it goes...Unless it does not match then it reverts lexer source back to point when this method was invoked.
boolean	peek(int to) Is the next character equal to 'to'
int	read() Read next character from this source
String	readLineBytes()
String	readUntil(char marker)
void	setIsANewLine(boolean nextCharIsOnANewLine)
void	setOffset(int offset)
int	skipUntil(int c)
String	toString()
void	unread(int c) Pushes char back onto this source.
void	unreadMany(CharSequence buffer)
boolean	wasBeginOfLine() Was the last character read from the stream the first character on a line

Methods inherited from class org.jrubyparser.lexer.LexerSource

getFilename, getLine, getOffset, getPosition, getPosition

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ReaderLexerSource

public ReaderLexerSource(String sourceName,
                         Reader in,
                         int line)

Create our food-source for the lexer

Parameters:

sourceName - is the file we are reading

reader - is what represents the contents of file sourceName

line - starting line number for source (used by eval)

extraPositionInformation - will gives us extra information that an IDE may want

Method Detail

read

public int read()
         throws IOException

Read next character from this source

Specified by:

read in class LexerSource

Returns:

next character to viewed by the source

Throws:

IOException

unread

public void unread(int c)

Pushes char back onto this source. Note, this also allows us to push whatever is passes back into the source.

Specified by:

unread in class LexerSource

Parameters:

to - be put back onto the source

peek

public boolean peek(int to)
             throws IOException

Is the next character equal to 'to'

Specified by:

peek in class LexerSource

Parameters:

to - character to compare against

Returns:

true if the same

Throws:

IOException

getSource

public static LexerSource getSource(String name,
                                    Reader content,
                                    ParserConfiguration configuration)

Create a source.

Parameters:

name - the name of the source (e.g a filename: foo.rb)

content - the data of the source

Returns:

the new source

readLineBytes

public String readLineBytes()
                     throws IOException

Specified by:

readLineBytes in class LexerSource

Throws:

IOException

skipUntil

public int skipUntil(int c)
              throws IOException

Specified by:

skipUntil in class LexerSource

Throws:

IOException

unreadMany

public void unreadMany(CharSequence buffer)

Specified by:

unreadMany in class LexerSource

matchMarker

public boolean matchMarker(String match,
                           boolean indent,
                           boolean checkNewline)
                    throws IOException

Description copied from class: LexerSource

Match marker against input consumering lexer source as it goes...Unless it does not match then it reverts lexer source back to point when this method was invoked.

Specified by:

matchMarker in class LexerSource

Parameters:

match - to match against

indent - eat any leading whitespace

checkNewline - includes a check that marker is followed by newline or EOF

Returns:

true if marker matches...false otherwise

Throws:

IOException - if an error occurred reading from underlying IO source

wasBeginOfLine

public boolean wasBeginOfLine()

Was the last character read from the stream the first character on a line

Specified by:

wasBeginOfLine in class LexerSource

Returns:

true if so

lastWasBeginOfLine

public boolean lastWasBeginOfLine()

Specified by:

lastWasBeginOfLine in class LexerSource

toString

public String toString()

Overrides:

toString in class Object

readUntil

public String readUntil(char marker)
                 throws IOException

Specified by:

readUntil in class LexerSource

Throws:

IOException

chompReadAhead

public int chompReadAhead()

Specified by:

chompReadAhead in class LexerSource

isANewLine

public boolean isANewLine()

Specified by:

isANewLine in class LexerSource

setIsANewLine

public void setIsANewLine(boolean nextCharIsOnANewLine)

Specified by:

setIsANewLine in class LexerSource

setOffset

public void setOffset(int offset)

Specified by:

setOffset in class LexerSource