Examples of de.danet.an.util.sax.HandlerStack

de.danet.an.util.sax.HandlerStack
HandlerStack provides support for dispatching SAX events to the appropriate target during processing of an XML document.
Writing an event handler for a SAX parser and being object oriented isn't easy. Most people tend to write one large event handler that knows far too much about the objects that it has to create and provide with information. According to the object oriented approach, every object should implement its own handling for the parts of the XML text that provides information about the object's state.
This means changing the parser's content handler in a controlled way. Each time that a handler encounters an element that denotes the start of another object, it should create another object and delegate further processing to this object. Or even better, it should call a (static) factory method for the class associated with the encountered element and leave all further processing to the factory method.
Effectively, this results in a stack of handler with events being delivered to the top of stack handler. This class implements such a stack with as much automation as possible.

        if (ldapContext == null) {
            throw new IllegalStateException 
              ("Attribute \"ldapContext\" must be specified.");
        }
        try {
            HandlerStack handler = new HandlerStack(new ContentHandler ());
            getXML (new XMLOutput(handler.contentHandler()));
        } catch (SAXException e) {
            throw new JellyTagException(e.getException());
        }
    }

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        if (ldapContext == null) {
            throw new IllegalStateException 
              ("Attribute \"ldapContext\" must be specified.");
        }
        try {
            HandlerStack handler = new HandlerStack(new ContentHandler ());
            getXML (new XMLOutput(handler.contentHandler()));
        } catch (SAXException e) {
            throw new JellyTagException(e.getException());
        }
    }

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        if (ldapContext == null) {
            throw new IllegalStateException 
              ("Attribute \"ldapContext\" must be specified.");
        }
        try {
            HandlerStack handler = new HandlerStack(new ContentHandler ());
            getXML (new XMLOutput(handler.contentHandler()));
        } catch (SAXException e) {
            throw new JellyTagException(e.getException());
        }
    }

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  setPaAuditEventSelection(procDef.auditEventSelection());
  setPaStoreAuditEvents(procDef.storeAuditEvents());
  baRepresentations.clear ();


  setPaPriority(Priority.NORMAL);
  HandlerStack hs = new HandlerStack (new SAXInitializer ());
  hs.setContextData ("packageId", procDef.packageId());
  try {
      procDef.toSAX().emit(hs.contentHandler());
  } catch (SAXException e) {
      logger.error (e.getMessage (), e);
      throw new IllegalArgumentException (e.getMessage ());
  }

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    }


    private String determineArrayType 
  (SAXEventBuffer buf, SerializationContext context)
  throws SAXException {
  HandlerStack hs = new HandlerStack (new ArrayTypeExtractor(context));
  hs.setContextData("types", new HashSet ());
  hs.setContextData ("items", new Integer (0));
  hs.setContextData ("typesValid", Boolean.TRUE);
  hs.contentHandler().startElement 
      ("", "root", "root", new AttributesImpl ());
  buf.emit (hs.contentHandler());
  hs.contentHandler().endElement ("", "root", "root");
  Set types = (Set)hs.getContextData("types");
  String xsdPref = context.getPrefixForURI(XMLUtil.XMLNS_SCHEMA);
  String arrayType;
  String dim = "[" + (Integer)hs.getContextData("items") + "]";
  if (!((Boolean)hs.getContextData ("typesValid")).booleanValue()
      || types.size () > 1) {
      arrayType = xsdPref + ":" + "ur-type" + dim;
  } else {
      Iterator i = types.iterator();
      NsAndLocal type = (NsAndLocal)i.next ();

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    protected static void importSAXAsChild
        (SOAPMessage message, SOAPElement parent, SAXEventBuffer sax)
        throws SOAPException {
        SOAPEnvelope env = message.getSOAPPart().getEnvelope();


        HandlerStack hs = new HandlerStack (new SOAPBuilder(parent));
        hs.setContextData ("envelope", env);
        try {
            sax.emit(hs.contentHandler());
        } catch (SAXException e) {
            throw (IllegalArgumentException)
                (new IllegalArgumentException(e.getMessage()).initCause(e));
        }
    }

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