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RE: multiple handlers

  • From: Nick Drew <drewn@i...>
  • To: xml-dev Mailing List <xml-dev@i...>
  • Date: Tue, 24 Feb 1998 15:10:03 -0000

nick drew
<..stuff deleted...>
During the last round, most people vetoed this idea.  Here it is
again, though, for your consideration:

  package org.xml.sax;
  import java.io.InputStream;

  public interface Parser {

    public void addEntityHandler (EntityHandler handler);
    public void removeEntityHandler (EntityHandler handler);

    public void addDocumentHandler (DocumentHandler handler);
    public void removeDocumentHandler (DocumentHandler handler);

    public void addErrorHandler (ErrorHandler handler);
    public void removeErrorHandler (ErrorHandler handler);

    public void parse (String publicId, String systemId)
      throws java.lang.Exception;

    public void parse (String publicId, String systemId,
                       InputStream inputStream)
      throws java.lang.Exception;

  }

Any further thoughts on this issue?


Apologies in advance: I'm quite new to the list, so missed this discussion first time around. 

It seems that the above suggestion isn't essential.  Perhaps there should be a standardised MulticastEntityHandler, MulticastDocumentHandler, and MulticastErrorHandler, which can be used instead, e.g.

{
	...
	MulticastDocumentHandler mdocHandler = new MyMulticastDocumentHandler();
	mdocHandler.addHandler( new ExistingDocumentHandler() );
	mdocHandler.addHandler( new AnotherExistingDocumentHandler() );

	...
	iParser.setEntityHandler( mdocHandler );
	...
}

and the MulticastDocumentHandler just delegates to its members as needed.


Nick Drew
icomm technologies ltd.


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