public boolean dispatch(boolean complete) throws IOException, XNIException 
{
            fEntityManager.setEntityHandler(null);
            try {
                boolean again;
                do {
                    again = false;
                    switch (fScannerState) {
                        case SCANNER_STATE_DTD_INTERNAL_DECLS: {
                            // REVISIT: Should there be a feature for
                            //          the "complete" parameter?
                            boolean completeDTD = true;
                            boolean readExternalSubset = (fValidation || fLoadExternalDTD) && (fValidationManager == null || !fValidationManager.isCachedDTD());
                            boolean moreToScan = fDTDScanner.scanDTDInternalSubset(completeDTD, fStandalone, fHasExternalDTD && readExternalSubset);
                            if (!moreToScan) {
                                // end doctype declaration
                                if (!fEntityScanner.skipChar(']")) {
                                    reportFatalError("EXPECTED_SQUARE_BRACKET_TO_CLOSE_INTERNAL_SUBSET",
                                                     null);
                                }
                                fEntityScanner.skipSpaces();
                                if (!fEntityScanner.skipChar(' >")) {
                                    reportFatalError("DoctypedeclUnterminated", new Object[]{fDoctypeName});
                                }
                                fMarkupDepth--;
                                // scan external subset next
                                if (fDoctypeSystemId != null) {
                                    fIsEntityDeclaredVC = !fStandalone;
                                    if (readExternalSubset) {
                                        setScannerState(SCANNER_STATE_DTD_EXTERNAL);
                                        break;
                                    }
                                }
                                else if (fExternalSubsetSource != null) {
                                    fIsEntityDeclaredVC = !fStandalone;
                                    if (readExternalSubset) {
                                        // This handles the case of a DOCTYPE that only had an internal subset.
                                        fDTDScanner.setInputSource(fExternalSubsetSource);
                                        fExternalSubsetSource = null;
                                        setScannerState(SCANNER_STATE_DTD_EXTERNAL_DECLS);
                                        break;
                                    }
                                }
                                // This document only has an internal subset. If it contains parameter entity
                                // references and standalone="no" then [Entity Declared] is a validity constraint.
                                else {
                                    fIsEntityDeclaredVC = fEntityManager.hasPEReferences() && !fStandalone;
                                }
                                // break out of this dispatcher.
                                setScannerState(SCANNER_STATE_PROLOG);
                                setDispatcher(fPrologDispatcher);
                                fEntityManager.setEntityHandler(XMLDocumentScannerImpl.this);
                                return true;
                            }
                            break;
                        }
                        case SCANNER_STATE_DTD_EXTERNAL: {
                            fDTDDescription.setValues(fDoctypePublicId, fDoctypeSystemId, null, null);
                            fDTDDescription.setRootName(fDoctypeName);
                            XMLInputSource xmlInputSource =
                                fEntityManager.resolveEntity(fDTDDescription);
                            fDTDScanner.setInputSource(xmlInputSource);
                            setScannerState(SCANNER_STATE_DTD_EXTERNAL_DECLS);
                            again = true;
                            break;
                        }
                        case SCANNER_STATE_DTD_EXTERNAL_DECLS: {
                            // REVISIT: Should there be a feature for
                            //          the "complete" parameter?
                            boolean completeDTD = true;
                            boolean moreToScan = fDTDScanner.scanDTDExternalSubset(completeDTD);
                            if (!moreToScan) {
                                setScannerState(SCANNER_STATE_PROLOG);
                                setDispatcher(fPrologDispatcher);
                                fEntityManager.setEntityHandler(XMLDocumentScannerImpl.this);
                                return true;
                            }
                            break;
                        }
                        default: {
                            throw new XNIException("DTDDispatcher#dispatch: scanner state="+fScannerState+" ("+getScannerStateName(fScannerState)+')");
                        }
                    }
                } while (complete || again);
            }
            // encoding errors
            catch (MalformedByteSequenceException e) {
                fErrorReporter.reportError(e.getDomain(), e.getKey(), 
                    e.getArguments(), XMLErrorReporter.SEVERITY_FATAL_ERROR, e);
                return false;
            }
            catch (CharConversionException e) {
                fErrorReporter.reportError(
                        XMLMessageFormatter.XML_DOMAIN,
                        "CharConversionFailure",
                        null,
                        XMLErrorReporter.SEVERITY_FATAL_ERROR, e);
                return false;
            }
            // premature end of file
            catch (EOFException e) {
                reportFatalError("PrematureEOF", null);
                return false;
                //throw e;
            }
            // cleanup
            finally {
                fEntityManager.setEntityHandler(XMLDocumentScannerImpl.this);
            }
            return true;
}

Dispatch an XML "event".