org.apache.xerces.xinclude
Class XIncludeTextReader

java.lang.Object
  extended by org.apache.xerces.xinclude.XIncludeTextReader
Direct Known Subclasses:
XInclude11TextReader

public class XIncludeTextReader
extends java.lang.Object

This class is used for reading resources requested in <include> elements, when the parse attribute of the <include> element is "text". Using this class will open the location, detect the encoding, and discard the byte order mark, if applicable. REVISIT: Much of the code in this class is taken from XMLEntityManager. It would be nice if this code could be shared in some way. However, since XMLEntityManager is used for reading files as XML, and this needs to read files as text, there would need to be some refactoring done.

Version:
$Id: XIncludeTextReader.java 724088 2008-12-07 06:07:55Z mrglavas $
Author:
Michael Glavassevich, IBM, Peter McCracken, IBM, Ankit Pasricha, IBM, Arun Yadav, Sun Microsystems Inc.
See Also:
XIncludeHandler

Constructor Summary
XIncludeTextReader(org.apache.xerces.xni.parser.XMLInputSource source, XIncludeHandler handler, int bufferSize)
          Construct the XIncludeReader using the XMLInputSource and XIncludeHandler.
 
Method Summary
 void close()
          Closes the stream.
protected  java.lang.String consumeBOM(java.io.InputStream stream, java.lang.String encoding)
          Removes the byte order mark from the stream, if it exists and returns the encoding name.
protected  java.lang.String getEncodingName(byte[] b4)
          REVISIT: This code is taken from org.apache.xerces.impl.XMLEntityManager.
protected  java.lang.String getEncodingName(java.io.InputStream stream)
          XMLEntityManager cares about endian-ness, since it creates its own optimized readers.
protected  java.io.Reader getReader(org.apache.xerces.xni.parser.XMLInputSource source)
          Return the Reader for given XMLInputSource.
protected  boolean isValid(int ch)
          Returns true if the specified character is a valid XML character as per the rules of XML 1.0.
 void parse()
          Read the input stream as text, and pass the text on to the XIncludeHandler using calls to characters().
protected  void setBufferSize(int bufferSize)
          Sets the buffer size property for the reader which decides the chunk sizes that are parsed by the reader at a time and passed to the handler
 void setErrorReporter(XMLErrorReporter errorReporter)
          Sets the XMLErrorReporter used for reporting errors while reading the text include.
 void setInputSource(org.apache.xerces.xni.parser.XMLInputSource source)
          Sets the input source on this text reader.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

XIncludeTextReader

public XIncludeTextReader(org.apache.xerces.xni.parser.XMLInputSource source,
                          XIncludeHandler handler,
                          int bufferSize)
                   throws java.io.IOException
Construct the XIncludeReader using the XMLInputSource and XIncludeHandler.

Parameters:
source - The XMLInputSource to use.
handler - The XIncludeHandler to use.
bufferSize - The size of this text reader's buffer.
Throws:
java.io.IOException
Method Detail

setErrorReporter

public void setErrorReporter(XMLErrorReporter errorReporter)
Sets the XMLErrorReporter used for reporting errors while reading the text include.

Parameters:
errorReporter - the XMLErrorReporter to be used for reporting errors.

getReader

protected java.io.Reader getReader(org.apache.xerces.xni.parser.XMLInputSource source)
                            throws java.io.IOException
Return the Reader for given XMLInputSource.

Parameters:
source - The XMLInputSource to use.
Throws:
java.io.IOException

getEncodingName

protected java.lang.String getEncodingName(java.io.InputStream stream)
                                    throws java.io.IOException
XMLEntityManager cares about endian-ness, since it creates its own optimized readers. Since we're just using generic Java readers for now, we're not caring about endian-ness. If this changes, even more code needs to be copied from XMLEntity manager. -- PJM

Throws:
java.io.IOException

consumeBOM

protected java.lang.String consumeBOM(java.io.InputStream stream,
                                      java.lang.String encoding)
                               throws java.io.IOException
Removes the byte order mark from the stream, if it exists and returns the encoding name.

Parameters:
stream -
encoding -
Throws:
java.io.IOException

getEncodingName

protected java.lang.String getEncodingName(byte[] b4)
REVISIT: This code is taken from org.apache.xerces.impl.XMLEntityManager. Is there any way we can share the code, without having it implemented twice? I think we should make it public and static in XMLEntityManager. --PJM Returns the IANA encoding name that is auto-detected from the bytes specified, with the endian-ness of that encoding where appropriate.

Parameters:
b4 - The first four bytes of the input.
Returns:
the encoding name, or null if no encoding could be detected

parse

public void parse()
           throws java.io.IOException
Read the input stream as text, and pass the text on to the XIncludeHandler using calls to characters(). This will read all of the text it can from the resource.

Throws:
java.io.IOException

setInputSource

public void setInputSource(org.apache.xerces.xni.parser.XMLInputSource source)
Sets the input source on this text reader.

Parameters:
source - The XMLInputSource to use.

close

public void close()
           throws java.io.IOException
Closes the stream. Call this after parse(), or when there is no longer any need for this object.

Throws:
java.io.IOException

isValid

protected boolean isValid(int ch)
Returns true if the specified character is a valid XML character as per the rules of XML 1.0.

Parameters:
ch - The character to check.

setBufferSize

protected void setBufferSize(int bufferSize)
Sets the buffer size property for the reader which decides the chunk sizes that are parsed by the reader at a time and passed to the handler

Parameters:
bufferSize - The size of the buffer desired


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