org.apache.batik.parser
Class AbstractScanner

java.lang.Object
  extended by org.apache.batik.parser.AbstractScanner
Direct Known Subclasses:
XPathSubsetContentSelector.Scanner

public abstract class AbstractScanner
extends Object

An abstract scanner class to be extended.


Field Summary
protected  int blankCharacters
          The characters to skip to create the string which represents the current token.
protected  char[] buffer
          The recording buffer.
protected  int current
          The current char.
protected  int end
          The end offset of the last lexical unit.
protected  int position
          The current position in the buffer.
protected  int previousType
          The previous lexical unit type that was scanned.
protected  NormalizingReader reader
          The reader.
protected  int start
          The start offset of the last lexical unit.
protected  int type
          The type of the current lexical unit.
 
Constructor Summary
AbstractScanner(InputStream is, String enc)
          Creates a new AbstractScanner object.
AbstractScanner(Reader r)
          Creates a new AbstractScanner object.
AbstractScanner(String s)
          Creates a new AbstractScanner object.
 
Method Summary
 void clearBuffer()
          Clears the buffer.
protected abstract  int endGap()
          Returns the end gap of the current lexical unit.
 char[] getBuffer()
          Returns the buffer used to store the chars.
 int getColumn()
          Returns the current column.
 int getEnd()
          Returns the end offset of the last lexical unit.
 int getLine()
          Returns the current line.
 int getStart()
          Returns the start offset of the last lexical unit.
 String getStringValue()
          Returns the string representation of the current lexical unit.
 int getType()
          The current lexical unit type like defined in LexicalUnits.
protected static boolean isEqualIgnoreCase(int i, char c)
          Compares the given int with the given character, ignoring case.
 int next()
          Returns the next token.
protected  int nextChar()
          Sets the value of the current char to the next character or -1 if the end of stream has been reached.
protected abstract  void nextToken()
          Returns the next token.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

reader

protected NormalizingReader reader
The reader.


current

protected int current
The current char.


buffer

protected char[] buffer
The recording buffer.


position

protected int position
The current position in the buffer.


type

protected int type
The type of the current lexical unit.


previousType

protected int previousType
The previous lexical unit type that was scanned.


start

protected int start
The start offset of the last lexical unit.


end

protected int end
The end offset of the last lexical unit.


blankCharacters

protected int blankCharacters
The characters to skip to create the string which represents the current token.

Constructor Detail

AbstractScanner

public AbstractScanner(Reader r)
                throws ParseException
Creates a new AbstractScanner object.

Parameters:
r - The reader to scan.
Throws:
ParseException

AbstractScanner

public AbstractScanner(InputStream is,
                       String enc)
                throws ParseException
Creates a new AbstractScanner object.

Parameters:
is - The input stream to scan.
enc - The encoding to use to decode the input stream, or null.
Throws:
ParseException

AbstractScanner

public AbstractScanner(String s)
                throws ParseException
Creates a new AbstractScanner object.

Parameters:
s - The string to scan.
Throws:
ParseException
Method Detail

getLine

public int getLine()
Returns the current line.


getColumn

public int getColumn()
Returns the current column.


getBuffer

public char[] getBuffer()
Returns the buffer used to store the chars.


getStart

public int getStart()
Returns the start offset of the last lexical unit.


getEnd

public int getEnd()
Returns the end offset of the last lexical unit.


clearBuffer

public void clearBuffer()
Clears the buffer.


getType

public int getType()
The current lexical unit type like defined in LexicalUnits.


getStringValue

public String getStringValue()
Returns the string representation of the current lexical unit.


next

public int next()
         throws ParseException
Returns the next token.

Throws:
ParseException

endGap

protected abstract int endGap()
Returns the end gap of the current lexical unit.


nextToken

protected abstract void nextToken()
                           throws ParseException
Returns the next token.

Throws:
ParseException

isEqualIgnoreCase

protected static boolean isEqualIgnoreCase(int i,
                                           char c)
Compares the given int with the given character, ignoring case.


nextChar

protected int nextChar()
                throws IOException
Sets the value of the current char to the next character or -1 if the end of stream has been reached.

Throws:
IOException


Copyright © 2008 Apache Software Foundation. All Rights Reserved.