StreamingCharReader

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org.apache.xerces.readers
Class StreamingCharReader

java.lang.Object
  org.apache.xerces.readers.XMLEntityReader
      org.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.