com.orientechnologies.orient.core.sql.parser

Class JavaCharStream

java.lang.Object

com.orientechnologies.orient.core.sql.parser.JavaCharStream

All Implemented Interfaces:

CharStream

public class JavaCharStream
extends Object
implements CharStream

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

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() Returns the next character that marks the beginning of the next token.
void	Done() Set buffers back to null when finished.
protected void	ExpandBuff(boolean wrapAround)
protected void	FillBuff()
int	getBeginColumn() Returns the column number of the first character for current token (being matched after the last call to BeginTOken).
int	getBeginLine() Returns the line number of the first character for current token (being matched after the last call to BeginTOken).
int	getColumn() Deprecated.
int	getEndColumn() Get end column.
int	getEndLine() Get end line.
String	GetImage() Returns a string made up of characters from the marked token beginning to the current buffer position.
int	getLine() Deprecated.
char[]	GetSuffix(int len) Returns an array of characters that make up the suffix of length 'len' for the currently matched token.
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.

JavaCharStream

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

Constructor.

JavaCharStream

public JavaCharStream(Reader dstream)

Constructor.

JavaCharStream

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

Constructor.

Throws:

UnsupportedEncodingException

JavaCharStream

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

Constructor.

JavaCharStream

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

Constructor.

Throws:

UnsupportedEncodingException

JavaCharStream

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

Constructor.

JavaCharStream

public JavaCharStream(InputStream dstream,
                      String encoding)
               throws UnsupportedEncodingException

Constructor.

Throws:

UnsupportedEncodingException

JavaCharStream

public JavaCharStream(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

ReadByte

protected char ReadByte()
                 throws IOException

Throws:

IOException

BeginToken

public char BeginToken()
                throws IOException

Description copied from interface: CharStream

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.

Specified by:

BeginToken in interface CharStream

Returns:

starting character for token.

Throws:

IOException

AdjustBuffSize

protected void AdjustBuffSize()

UpdateLineColumn

protected void UpdateLineColumn(char c)

readChar

public char readChar()
              throws IOException

Read a character.

Specified by:

readChar in interface CharStream

Throws:

IOException

getColumn

@Deprecated
public int getColumn()

Deprecated.

Specified by:

getColumn in interface CharStream

getLine

@Deprecated
public int getLine()

Deprecated.

Specified by:

getLine in interface CharStream

getEndColumn

public int getEndColumn()

Get end column.

Specified by:

getEndColumn in interface CharStream

getEndLine

public int getEndLine()

Get end line.

Specified by:

getEndLine in interface CharStream

getBeginColumn

public int getBeginColumn()

Description copied from interface: CharStream

Returns the column number of the first character for current token (being matched after the last call to BeginTOken).

Specified by:

getBeginColumn in interface CharStream

Returns:

column of token start

getBeginLine

public int getBeginLine()

Description copied from interface: CharStream

Returns the line number of the first character for current token (being matched after the last call to BeginTOken).

Specified by:

getBeginLine in interface CharStream

Returns:

line number of token start

backup

public void backup(int amount)

Retreat.

Specified by:

backup in interface CharStream

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,
                   int startline,
                   int startcolumn)
            throws UnsupportedEncodingException

Reinitialise.

Throws:

UnsupportedEncodingException

ReInit

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

Reinitialise.

ReInit

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

Reinitialise.

Throws:

UnsupportedEncodingException

ReInit

public void ReInit(InputStream dstream)

Reinitialise.

GetImage

public String GetImage()

Description copied from interface: CharStream

Returns a string made up of characters from the marked token beginning to the current buffer position. Implementations have the choice of returning anything that they want to. For example, for efficiency, one might decide to just return null, which is a valid implementation.

Specified by:

GetImage in interface CharStream

Returns:

token image as String

GetSuffix

public char[] GetSuffix(int len)

Description copied from interface: CharStream

Returns an array of characters that make up the suffix of length 'len' for the currently matched token. This is used to build up the matched string for use in actions in the case of MORE. A simple and inefficient implementation of this is as follows :

{ String t = GetImage(); return t.substring(t.length() - len, t.length()).toCharArray(); }

Specified by:

GetSuffix in interface CharStream

Returns:

suffix

Done

public void Done()

Set buffers back to null when finished.

Specified by:

Done in interface CharStream

adjustBeginLineColumn

public void adjustBeginLineColumn(int newLine,
                                  int newCol)

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