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org.apache.xerces.readers
Class StreamingCharReader  view StreamingCharReader download StreamingCharReader.java

java.lang.Object
  extended byorg.apache.xerces.readers.XMLEntityReader
      extended byorg.apache.xerces.readers.StreamingCharReader
All Implemented Interfaces:
XMLEntityHandler.EntityReader

public class StreamingCharReader
extends XMLEntityReader

An reader class for applications that need to process input data as it arrives on the stream.

Version:
$Id: StreamingCharReader.java,v 1.2 2000/10/07 18:06:55 markd Exp $

Nested Class Summary
private  class StreamingCharReader.DeferredError
           
 
Field Summary
private static char[] cdata_string
           
private  boolean fCallClearPreviousChunk
           
protected  boolean fCalledCharPropInit
           
protected  int fCarriageReturnCounter
           
protected  int fCharacterCounter
           
protected  java.io.Reader fCharacterStream
           
protected  XMLEntityHandler.CharDataHandler fCharDataHandler
           
protected  org.apache.xerces.utils.CharDataChunk fCurrentChunk
           
protected  int fCurrentIndex
           
protected  int fCurrentOffset
           
private  java.util.Vector fDeferredErrors
           
protected  XMLEntityHandler fEntityHandler
           
protected  org.apache.xerces.framework.XMLErrorReporter fErrorReporter
           
protected  int fFillIndex
           
protected  boolean fInCDSect
           
protected  int fLength
           
protected  int fLinefeedCounter
           
protected  int fMostRecentChar
           
protected  char[] fMostRecentData
           
protected  boolean fSendCharDataAsCharArray
           
private  org.apache.xerces.utils.StringPool fStringPool
           
private  char[] inBuffer
           
private  int oweChar
           
private  boolean seenCR
           
 
Constructor Summary
StreamingCharReader(XMLEntityHandler entityHandler, org.apache.xerces.framework.XMLErrorReporter errorReporter, boolean sendCharDataAsCharArray, java.io.Reader reader, org.apache.xerces.utils.StringPool stringPool)
          Constructor
 
Method Summary
 int addString(int offset, int length)
          Add a string to the StringPool from the characters scanned using this reader as described by offset and length.
 int addSymbol(int offset, int length)
          Add a symbol to the StringPool from the characters scanned using this reader as described by offset and length.
 void append(XMLEntityHandler.CharBuffer charBuffer, int offset, int length)
          Append the characters processed by this reader associated with offset and length to the CharBuffer.
private  boolean atEOF(int offset)
           
private  void callCharDataHandler(int offset, int endOffset, boolean isWhitespace)
           
protected  XMLEntityHandler.EntityReader changeReaders()
          Change readers at end of input.
 int currentOffset()
          Return the current offset within this reader.
protected  void deferException(int errorCode, java.lang.Object[] args, int offset)
          Delay reporting an error message.
 int getColumnNumber()
          Return the column number of the current position within the document that we are processing.
 boolean getInCDSect()
          This method is provided for scanner implementations.
 int getLineNumber()
          Return the line number of the current position within the document that we are processing.
protected  void init(XMLEntityHandler entityHandler, org.apache.xerces.framework.XMLErrorReporter errorReporter, boolean sendCharDataAsCharArray, int lineNumber, int columnNumber)
           
private  void loadFirstChar()
           
private  int loadMoreChars()
           
private  int loadNextChar()
           
 boolean lookingAtChar(char chr, boolean skipPastChar)
          Test that the current character is a ch character.
 boolean lookingAtSpace(boolean skipPastChar)
          Test that the current character is a whitespace character.
 boolean lookingAtValidChar(boolean skipPastChar)
          Test that the current character is valid.
private  int recognizeMarkup(int ch)
           
private  int recognizeReference(int ch)
           
 int scanAttValue(char qchar, boolean asSymbol)
          Scan an attribute value.
 int scanCharRef(boolean hex)
          Scan a character reference.
 int scanContent(org.apache.xerces.utils.QName element)
          Skip through the input while we are looking at character data.
 int scanEntityValue(int qchar, boolean createString)
          Scan an entity value.
 boolean scanExpectedName(char fastcheck, org.apache.xerces.utils.StringPool.CharArrayRange expectedName)
          Scan the name that is expected at the current position in the document.
 int scanInvalidChar()
          Scan an invalid character.
 int scanName(char fastcheck)
          Add a sequence of characters that match the XML definition of a Name to the StringPool.
 void scanQName(char fastcheck, org.apache.xerces.utils.QName qname)
          Add a sequence of characters that match the XML Namespaces definition of a QName to the StringPool.
 int scanStringLiteral()
          Scan a string literal.
 void setInCDSect(boolean inCDSect)
          This method is provided for scanner implementations.
private  int skipAsciiCharData()
           
private  boolean skipMultiByteCharData(int ch)
           
 void skipPastName(char fastcheck)
          Skip past a sequence of characters that match the XML definition of a Name.
 void skipPastNmtoken(char fastcheck)
          Skip past a sequence of characters that match the XML definition of an Nmtoken.
 void skipPastSpaces()
          Skip past whitespace characters starting at the current position.
 boolean skippedString(char[] s)
          Skip past a sequence of characters that matches the specified character array.
 void skipToChar(char chr)
          Advance through the input data up to the next ch character.
private  int slowLoadNextChar()
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

cdata_string

private static final char[] cdata_string

fStringPool

private org.apache.xerces.utils.StringPool fStringPool

fCallClearPreviousChunk

private boolean fCallClearPreviousChunk

fDeferredErrors

private java.util.Vector fDeferredErrors

seenCR

private boolean seenCR

oweChar

private int oweChar

inBuffer

private char[] inBuffer

fCharacterStream

protected java.io.Reader fCharacterStream

fCurrentChunk

protected org.apache.xerces.utils.CharDataChunk fCurrentChunk

fCurrentIndex

protected int fCurrentIndex

fFillIndex

protected int fFillIndex

fMostRecentData

protected char[] fMostRecentData

fMostRecentChar

protected int fMostRecentChar

fLength

protected int fLength

fCalledCharPropInit

protected boolean fCalledCharPropInit

fEntityHandler

protected XMLEntityHandler fEntityHandler

fErrorReporter

protected org.apache.xerces.framework.XMLErrorReporter fErrorReporter

fSendCharDataAsCharArray

protected boolean fSendCharDataAsCharArray

fCharDataHandler

protected XMLEntityHandler.CharDataHandler fCharDataHandler

fInCDSect

protected boolean fInCDSect

fCarriageReturnCounter

protected int fCarriageReturnCounter

fLinefeedCounter

protected int fLinefeedCounter

fCharacterCounter

protected int fCharacterCounter

fCurrentOffset

protected int fCurrentOffset
Constructor Detail

StreamingCharReader

public StreamingCharReader(XMLEntityHandler entityHandler,
                           org.apache.xerces.framework.XMLErrorReporter errorReporter,
                           boolean sendCharDataAsCharArray,
                           java.io.Reader reader,
                           org.apache.xerces.utils.StringPool stringPool)
                    throws java.lang.Exception
Constructor

Method Detail

deferException

protected void deferException(int errorCode,
                              java.lang.Object[] args,
                              int offset)
Delay reporting an error message. If there is an error detected in the underlying input stream during the fillCurrentChunk method, the error is described here and will be reported when we reach that offset during normal processing. The subclass should place a character with a value of zero at that offset, which will be detected here as an invalid character. When the invalid character is scanned, we will generate the deferred exception.


changeReaders

protected XMLEntityHandler.EntityReader changeReaders()
                                               throws java.lang.Exception
Change readers at end of input. We override our superclass method to release the final chunk of the input data before handing off to the next reader.

Overrides:
changeReaders in class XMLEntityReader

append

public void append(XMLEntityHandler.CharBuffer charBuffer,
                   int offset,
                   int length)
Append the characters processed by this reader associated with offset and length to the CharBuffer.


addString

public int addString(int offset,
                     int length)
Add a string to the StringPool from the characters scanned using this reader as described by offset and length.


addSymbol

public int addSymbol(int offset,
                     int length)
Add a symbol to the StringPool from the characters scanned using this reader as described by offset and length.


lookingAtChar

public boolean lookingAtChar(char chr,
                             boolean skipPastChar)
                      throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Test that the current character is a ch character.


lookingAtValidChar

public boolean lookingAtValidChar(boolean skipPastChar)
                           throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Test that the current character is valid.


lookingAtSpace

public boolean lookingAtSpace(boolean skipPastChar)
                       throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Test that the current character is a whitespace character.


skipToChar

public void skipToChar(char chr)
                throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Advance through the input data up to the next ch character.


skipPastSpaces

public void skipPastSpaces()
                    throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Skip past whitespace characters starting at the current position.


skipPastName

public void skipPastName(char fastcheck)
                  throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Skip past a sequence of characters that match the XML definition of a Name.


skipPastNmtoken

public void skipPastNmtoken(char fastcheck)
                     throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Skip past a sequence of characters that match the XML definition of an Nmtoken.


skippedString

public boolean skippedString(char[] s)
                      throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Skip past a sequence of characters that matches the specified character array.


scanInvalidChar

public int scanInvalidChar()
                    throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Scan an invalid character.


scanCharRef

public int scanCharRef(boolean hex)
                throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Scan a character reference.


scanStringLiteral

public int scanStringLiteral()
                      throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Scan a string literal.


scanAttValue

public int scanAttValue(char qchar,
                        boolean asSymbol)
                 throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Scan an attribute value.


scanEntityValue

public int scanEntityValue(int qchar,
                           boolean createString)
                    throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Scan an entity value.


scanName

public int scanName(char fastcheck)
             throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Add a sequence of characters that match the XML definition of a Name to the StringPool. If we find a name at the current position we will add it to the StringPool as a symbol and will return the string pool handle for that symbol to the caller.


scanExpectedName

public boolean scanExpectedName(char fastcheck,
                                org.apache.xerces.utils.StringPool.CharArrayRange expectedName)
                         throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Scan the name that is expected at the current position in the document. This method is invoked when we are scanning the element type in an end tag that must match the element type in the corresponding start tag.


scanQName

public void scanQName(char fastcheck,
                      org.apache.xerces.utils.QName qname)
               throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Add a sequence of characters that match the XML Namespaces definition of a QName to the StringPool. If we find a QName at the current position we will add it to the StringPool and will return the string pool handle of that QName to the caller.


scanContent

public int scanContent(org.apache.xerces.utils.QName element)
                throws java.lang.Exception
Description copied from interface: XMLEntityHandler.EntityReader
Skip through the input while we are looking at character data.


recognizeMarkup

private int recognizeMarkup(int ch)
                     throws java.lang.Exception

recognizeReference

private int recognizeReference(int ch)
                        throws java.lang.Exception

skipMultiByteCharData

private boolean skipMultiByteCharData(int ch)
                               throws java.lang.Exception

skipAsciiCharData

private int skipAsciiCharData()
                       throws java.lang.Exception

callCharDataHandler

private void callCharDataHandler(int offset,
                                 int endOffset,
                                 boolean isWhitespace)
                          throws java.lang.Exception

slowLoadNextChar

private int slowLoadNextChar()
                      throws java.lang.Exception

loadNextChar

private int loadNextChar()
                  throws java.lang.Exception

loadFirstChar

private void loadFirstChar()
                    throws java.lang.Exception

loadMoreChars

private int loadMoreChars()
                   throws java.lang.Exception

atEOF

private boolean atEOF(int offset)

init

protected void init(XMLEntityHandler entityHandler,
                    org.apache.xerces.framework.XMLErrorReporter errorReporter,
                    boolean sendCharDataAsCharArray,
                    int lineNumber,
                    int columnNumber)

currentOffset

public int currentOffset()
Return the current offset within this reader.

Specified by:
currentOffset in interface XMLEntityHandler.EntityReader

getLineNumber

public int getLineNumber()
Return the line number of the current position within the document that we are processing.

Specified by:
getLineNumber in interface XMLEntityHandler.EntityReader

getColumnNumber

public int getColumnNumber()
Return the column number of the current position within the document that we are processing.

Specified by:
getColumnNumber in interface XMLEntityHandler.EntityReader

setInCDSect

public void setInCDSect(boolean inCDSect)
This method is provided for scanner implementations.

Specified by:
setInCDSect in interface XMLEntityHandler.EntityReader

getInCDSect

public boolean getInCDSect()
This method is provided for scanner implementations.

Specified by:
getInCDSect in interface XMLEntityHandler.EntityReader