ognl

Class JavaCharStream

java.lang.Object

ognl.JavaCharStream

public class JavaCharStream
extends Object

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 int[]	bufcolumn
protected char[]	buffer
protected int[]	bufline
int	bufpos Position in buffer.
protected int	column
protected int	inBuf
protected Reader	inputStream
protected int	line
protected int	maxNextCharInd
protected char[]	nextCharBuf
protected int	nextCharInd
protected boolean	prevCharIsCR
protected boolean	prevCharIsLF
static boolean	staticFlag Whether parser is static.
protected int	tabSize

Constructor Summary

Constructors

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

Methods

Modifier and Type	Method and Description
void	adjustBeginLineColumn(int newLine, int newCol) Method to adjust line and column numbers for the start of a token.
protected void	AdjustBuffSize()
void	backup(int amount) Retreat.
char	BeginToken() Begin processing a new token, returning the starting character for the token.
void	Done() Set buffers back to null when finished.
protected void	ExpandBuff(boolean wrapAround)
protected void	FillBuff()
int	getBeginColumn()
int	getBeginLine()
int	getColumn() Deprecated.
int	getEndColumn() Get end column.
int	getEndLine() Get end line.
String	GetImage()
int	getLine() Deprecated.
char[]	GetSuffix(int len) Get the suffix of the specified length.
protected int	getTabSize(int i)
protected char	ReadByte()
char	readChar() Read a character.
void	ReInit(InputStream dstream) Reinitialise.
void	ReInit(InputStream dstream, int startline, int startcolumn) Reinitialise.
void	ReInit(InputStream dstream, int startline, int startcolumn, int buffersize) Reinitialise.
void	ReInit(InputStream dstream, String encoding) Reinitialise.
void	ReInit(InputStream dstream, String encoding, int startline, int startcolumn) Reinitialise.
void	ReInit(InputStream dstream, String 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	setTabSize(int i)
protected void	UpdateLineColumn(char c)

Methods inherited from class java.lang.Object

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

Field Detail

staticFlag

public static final boolean staticFlag

Whether parser is static.

See Also:

Constant Field Values

bufpos

public int bufpos

Position in buffer.

bufline

protected int[] bufline

bufcolumn

protected int[] bufcolumn

column

protected int column

line

protected int line

prevCharIsCR

protected boolean prevCharIsCR

prevCharIsLF

protected boolean prevCharIsLF

inputStream

protected Reader inputStream

nextCharBuf

protected char[] nextCharBuf

buffer

protected char[] buffer

maxNextCharInd

protected int maxNextCharInd

nextCharInd

protected int nextCharInd

inBuf

protected int inBuf

tabSize

protected int tabSize

Constructor Detail

JavaCharStream

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

Constructor.

Parameters:

dstream - the datastream to read from.

startline - the line number to start processing from.

startcolumn - the column number to start processing from.

buffersize - the size of the initial buffer to use to process the dstream.

JavaCharStream

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

Constructor.

Parameters:

dstream - the datastream to read from.

startline - the line number to start processing from.

startcolumn - the column number to start processing from.

JavaCharStream

public JavaCharStream(Reader dstream)

Constructor.

Parameters:

dstream - the datastream to read from.

JavaCharStream

public JavaCharStream(InputStream dstream,
              String encoding,
              int startline,
              int startcolumn,
              int buffersize)
               throws UnsupportedEncodingException

Constructor.

Parameters:

dstream - the datastream to read from.

encoding - the encoding to use for the dstream.

startline - the line number to start processing from.

startcolumn - the column number to start processing from.

buffersize - the size of the initial buffer to use to process the dstream.

Throws:

UnsupportedEncodingException - if the chosen encoding is not supported.

JavaCharStream

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

Constructor.

Parameters:

dstream - the datastream to read from.

startline - the line number to start processing from.

startcolumn - the column number to start processing from.

buffersize - the size of the initial buffer to use to process the dstream.

JavaCharStream

public JavaCharStream(InputStream dstream,
              String encoding,
              int startline,
              int startcolumn)
               throws UnsupportedEncodingException

Constructor.

Parameters:

dstream - the datastream to read from.

encoding - the encoding to use for the dstream.

startline - the line number to start processing from.

startcolumn - the column number to start processing from.

Throws:

UnsupportedEncodingException - if the chosen encoding is not supported.

JavaCharStream

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

Constructor.

Parameters:

dstream - the datastream to read from.

startline - the line number to start processing from.

startcolumn - the column number to start processing from.

JavaCharStream

public JavaCharStream(InputStream dstream,
              String encoding)
               throws UnsupportedEncodingException

Constructor.

Parameters:

dstream - the datastream to read from.

encoding - the encoding to use for the dstream.

Throws:

UnsupportedEncodingException - if the chosen encoding is not supported.

JavaCharStream

public JavaCharStream(InputStream dstream)

Constructor.

Parameters:

dstream - the datastream to read from.

Method Detail

setTabSize

protected void setTabSize(int i)

getTabSize

protected int getTabSize(int i)

ExpandBuff

protected void ExpandBuff(boolean wrapAround)

FillBuff

protected void FillBuff()
                 throws IOException

Throws:

IOException

ReadByte

protected char ReadByte()
                 throws IOException

Throws:

IOException

BeginToken

public char BeginToken()
                throws IOException

Begin processing a new token, returning the starting character for the token.

Returns:

starting character for token.

Throws:

IOException - if the operation fails a read operation.

AdjustBuffSize

protected void AdjustBuffSize()

UpdateLineColumn

protected void UpdateLineColumn(char c)

readChar

public char readChar()
              throws IOException

Read a character.

Returns:

the character that was read for processing.

Throws:

IOException - if the operation fails a read operation.

getColumn

public int getColumn()

Deprecated.

Get the current column number.

Returns:

the current column number.

See Also:

getEndColumn()

getLine

public int getLine()

Deprecated.

Get the current line number.

Returns:

the current line number.

See Also:

getEndLine()

getEndColumn

public int getEndColumn()

Get end column.

Returns:

the end column number.

getEndLine

public int getEndLine()

Get end line.

Returns:

the end line number.

getBeginColumn

public int getBeginColumn()

Returns:

column of token start

getBeginLine

public int getBeginLine()

Returns:

line number of token start

backup

public void backup(int amount)

Retreat.

Parameters:

amount - the amount to backup (retreat) in the stream.

ReInit

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

Reinitialise.

Parameters:

dstream - the datastream to read from.

startline - the line number to start processing from.

startcolumn - the column number to start processing from.

buffersize - the size of the initial buffer to use to process the dstream.

ReInit

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

Reinitialise.

Parameters:

dstream - the datastream to read from.

startline - the line number to start processing from.

startcolumn - the column number to start processing from.

ReInit

public void ReInit(Reader dstream)

Reinitialise.

Parameters:

dstream - the datastream to read from.

ReInit

public void ReInit(InputStream dstream,
          String encoding,
          int startline,
          int startcolumn,
          int buffersize)
            throws UnsupportedEncodingException

Reinitialise.

Parameters:

dstream - the datastream to read from.

encoding - the encoding to use for the dstream.

startline - the line number to start processing from.

startcolumn - the column number to start processing from.

buffersize - the size of the initial buffer to use to process the dstream.

Throws:

UnsupportedEncodingException - if the chosen encoding is not supported.

ReInit

public void ReInit(InputStream dstream,
          int startline,
          int startcolumn,
          int buffersize)

Reinitialise.

Parameters:

dstream - the datastream to read from.

startline - the line number to start processing from.

startcolumn - the column number to start processing from.

buffersize - the size of the initial buffer to use to process the dstream.

ReInit

public void ReInit(InputStream dstream,
          String encoding,
          int startline,
          int startcolumn)
            throws UnsupportedEncodingException

Reinitialise.

Parameters:

dstream - the datastream to read from.

encoding - the encoding to use for the dstream.

startline - the line number to start processing from.

startcolumn - the column number to start processing from.

Throws:

UnsupportedEncodingException - if the chosen encoding is not supported.

ReInit

public void ReInit(InputStream dstream,
          int startline,
          int startcolumn)

Reinitialise.

Parameters:

dstream - the datastream to read from.

startline - the line number to start processing from.

startcolumn - the column number to start processing from.

ReInit

public void ReInit(InputStream dstream,
          String encoding)
            throws UnsupportedEncodingException

Reinitialise.

Parameters:

dstream - the datastream to read from.

encoding - the encoding to use for the dstream.

Throws:

UnsupportedEncodingException - if the chosen encoding is not supported.

ReInit

public void ReInit(InputStream dstream)

Reinitialise.

Parameters:

dstream - the datastream to read from.

GetImage

public String GetImage()

Returns:

token image as String

GetSuffix

public char[] GetSuffix(int len)

Get the suffix of the specified length.

Parameters:

len - the length of the suffix to get.

Returns:

suffix

Done

public void Done()

Set buffers back to null when finished.

adjustBeginLineColumn

public void adjustBeginLineColumn(int newLine,
                         int newCol)

Method to adjust line and column numbers for the start of a token.

Parameters:

newLine - the new line number for the start of a token.

newCol - the new column number for the start of a token.