multiple handlers

Nick Drew drewn at
Tue Feb 24 15:08:01 GMT 1998

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

  package org.xml.sax;

  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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