com.pervasive.datarush.expression

Class SimpleCharStream

java.lang.Object

com.pervasive.datarush.expression.SimpleCharStream

public class SimpleCharStream
extends Object

An implementation of interface CharStream, where the stream is assumed to contain only ASCII characters (without unicode 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 boolean	prevCharIsCR
protected boolean	prevCharIsLF
static boolean	staticFlag Whether parser is static.
protected int	tabSize

Constructor Summary

Constructors

Constructor and Description
SimpleCharStream(InputStream dstream) Constructor.
SimpleCharStream(InputStream dstream, int startline, int startcolumn) Constructor.
SimpleCharStream(InputStream dstream, int startline, int startcolumn, int buffersize) Constructor.
SimpleCharStream(InputStream dstream, String encoding) Constructor.
SimpleCharStream(InputStream dstream, String encoding, int startline, int startcolumn) Constructor.
SimpleCharStream(InputStream dstream, String encoding, int startline, int startcolumn, int buffersize) Constructor.
SimpleCharStream(Reader dstream) Constructor.
SimpleCharStream(Reader dstream, int startline, int startcolumn) Constructor.
SimpleCharStream(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.
void	backup(int amount) Backup a number of characters.
char	BeginToken() Start.
void	Done() Reset buffer when finished.
protected void	ExpandBuff(boolean wrapAround)
protected void	FillBuff()
int	getBeginColumn() Get token beginning column number.
int	getBeginLine() Get token beginning line number.
int	getColumn() Deprecated.
int	getEndColumn() Get token end column number.
int	getEndLine() Get token end line number.
String	GetImage() Get token literal value.
int	getLine() Deprecated.
char[]	GetSuffix(int len) Get the suffix.
protected int	getTabSize(int i)
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

buffer

protected char[] buffer

maxNextCharInd

protected int maxNextCharInd

inBuf

protected int inBuf

tabSize

protected int tabSize

Constructor Detail

SimpleCharStream

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

Constructor.

SimpleCharStream

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

Constructor.

SimpleCharStream

public SimpleCharStream(Reader dstream)

Constructor.

SimpleCharStream

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

Constructor.

Throws:

UnsupportedEncodingException

SimpleCharStream

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

Constructor.

SimpleCharStream

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

Constructor.

Throws:

UnsupportedEncodingException

SimpleCharStream

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

Constructor.

SimpleCharStream

public SimpleCharStream(InputStream dstream,
                String encoding)
                 throws UnsupportedEncodingException

Constructor.

Throws:

UnsupportedEncodingException

SimpleCharStream

public SimpleCharStream(InputStream dstream)

Constructor.

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

BeginToken

public char BeginToken()
                throws IOException

Start.

Throws:

IOException

UpdateLineColumn

protected void UpdateLineColumn(char c)

readChar

public char readChar()
              throws IOException

Read a character.

Throws:

IOException

getColumn

@Deprecated
public int getColumn()

Deprecated.

getLine

@Deprecated
public int getLine()

Deprecated.

getEndColumn

public int getEndColumn()

Get token end column number.

getEndLine

public int getEndLine()

Get token end line number.

getBeginColumn

public int getBeginColumn()

Get token beginning column number.

getBeginLine

public int getBeginLine()

Get token beginning line number.

backup

public void backup(int amount)

Backup a number of characters.

ReInit

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

Reinitialise.

ReInit

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

Reinitialise.

ReInit

public void ReInit(Reader dstream)

Reinitialise.

ReInit

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

Reinitialise.

Throws:

UnsupportedEncodingException

ReInit

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

Reinitialise.

ReInit

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

Reinitialise.

Throws:

UnsupportedEncodingException

ReInit

public void ReInit(InputStream dstream)

Reinitialise.

ReInit

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

Reinitialise.

Throws:

UnsupportedEncodingException

ReInit

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

Reinitialise.

GetImage

public String GetImage()

Get token literal value.

GetSuffix

public char[] GetSuffix(int len)

Get the suffix.

Done

public void Done()

Reset buffer when finished.

adjustBeginLineColumn

public void adjustBeginLineColumn(int newLine,
                         int newCol)

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