io.appform.hope.lang.parser

Class JavaCharStream

java.lang.Object

io.appform.hope.lang.parser.AbstractCharStream

io.appform.hope.lang.parser.JavaCharStream

All Implemented Interfaces:

CharStream

public class JavaCharStream
extends AbstractCharStream

An implementation of interface CharStream, where the stream is assumed to contain only ASCII characters (with java-like unicode escape processing).

Field Summary

Fields

Modifier and Type	Field and Description
protected Reader	inputStream

Fields inherited from class io.appform.hope.lang.parser.AbstractCharStream

available, bufcolumn, buffer, bufline, bufpos, bufsize, column, DEFAULT_BUF_SIZE, inBuf, line, maxNextCharInd, nextCharBuf, nextCharInd, prevCharIsCR, prevCharIsLF, tokenBegin

Constructor Summary

Constructors

Constructor and Description
JavaCharStream(InputStream dstream, Charset encoding) Constructor.
JavaCharStream(InputStream dstream, Charset encoding, int startline, int startcolumn) Constructor.
JavaCharStream(InputStream dstream, Charset encoding, int startline, int startcolumn, int buffersize) Constructor.
JavaCharStream(Reader dstream) Constructor.
JavaCharStream(Reader dstream, int startline, int startcolumn) Constructor.
JavaCharStream(Reader dstream, int startline, int startcolumn, int buffersize) Constructor.

Method Summary

Modifier and Type	Method and Description
protected void	adjustBuffSize()
char	beginToken()
protected void	fillBuff()
protected char	readByte()
char	readChar() Read a character.
void	reInit(InputStream dstream, Charset encoding) Reinitialise.
void	reInit(InputStream dstream, Charset encoding, int startline, int startcolumn) Reinitialise.
void	reInit(InputStream dstream, Charset encoding, int startline, int startcolumn, int buffersize) Reinitialise.
void	reInit(Reader dstream) Reinitialise.
void	reInit(Reader dstream, int startline, int startcolumn) Reinitialise.
void	reInit(Reader dstream, int startline, int startcolumn, int buffersize) Reinitialise.
protected void	streamClose()
protected int	streamRead(char[] buffer, int offset, int len)

Methods inherited from class io.appform.hope.lang.parser.AbstractCharStream

adjustBeginLineColumn, backup, done, expandBuff, getBeginColumn, getBeginLine, getEndColumn, getEndLine, getImage, getSuffix, getTabSize, isTrackLineColumn, reInit, setTabSize, setTrackLineColumn, updateLineColumn

Methods inherited from class java.lang.Object

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

Field Detail

inputStream

protected Reader inputStream

Constructor Detail

JavaCharStream

public JavaCharStream(Reader dstream,
                      int startline,
                      int startcolumn,
                      int buffersize)

Constructor.

JavaCharStream

public JavaCharStream(Reader dstream,
                      int startline,
                      int startcolumn)

Constructor.

JavaCharStream

public JavaCharStream(Reader dstream)

Constructor.

JavaCharStream

public JavaCharStream(InputStream dstream,
                      Charset encoding,
                      int startline,
                      int startcolumn,
                      int buffersize)

Constructor.

JavaCharStream

public JavaCharStream(InputStream dstream,
                      Charset encoding,
                      int startline,
                      int startcolumn)

Constructor.

JavaCharStream

public JavaCharStream(InputStream dstream,
                      Charset encoding)

Constructor.

Method Detail

streamRead

protected int streamRead(char[] buffer,
                         int offset,
                         int len)
                  throws IOException

Specified by:

streamRead in class AbstractCharStream

Throws:

IOException

streamClose

protected void streamClose()
                    throws IOException

Specified by:

streamClose in class AbstractCharStream

Throws:

IOException

fillBuff

protected void fillBuff()
                 throws IOException

Overrides:

fillBuff in class AbstractCharStream

Throws:

IOException

readByte

protected char readByte()
                 throws IOException

Throws:

IOException

beginToken

public char beginToken()
                throws IOException

Specified by:

beginToken in interface CharStream

Overrides:

beginToken in class AbstractCharStream

Returns:

the next character that marks the beginning of the next token. All characters must remain in the buffer between two successive calls to this method to implement backup correctly.

Throws:

IOException

adjustBuffSize

protected void adjustBuffSize()

readChar

public char readChar()
              throws IOException

Read a character.

Specified by:

readChar in interface CharStream

Overrides:

readChar in class AbstractCharStream

Returns:

the next character from the selected input

Throws:

IOException - on IO error

reInit

public void reInit(Reader dstream)

Reinitialise.

reInit

public void reInit(Reader dstream,
                   int startline,
                   int startcolumn)

Reinitialise.

reInit

public void reInit(Reader dstream,
                   int startline,
                   int startcolumn,
                   int buffersize)

Reinitialise.

reInit

public void reInit(InputStream dstream,
                   Charset encoding)

Reinitialise.

reInit

public void reInit(InputStream dstream,
                   Charset encoding,
                   int startline,
                   int startcolumn)

Reinitialise.

reInit

public void reInit(InputStream dstream,
                   Charset encoding,
                   int startline,
                   int startcolumn,
                   int buffersize)

Reinitialise.