xml11nsdocumentscannerimpl.java

java1.6众多例子参考

                }
            }

            if (length > 1) {
                QName name = fAttributes.checkDuplicatesNS();
                if (name != null) {
                    if (name.uri != null) {
                        fErrorReporter.reportError(
                            XMLMessageFormatter.XMLNS_DOMAIN,
                            "AttributeNSNotUnique",
                            new Object[] {
                                fElementQName.rawname,
                                name.localpart,
                                name.uri },
                            XMLErrorReporter.SEVERITY_FATAL_ERROR);
                    } else {
                        fErrorReporter.reportError(
                            XMLMessageFormatter.XMLNS_DOMAIN,
                            "AttributeNotUnique",
                            new Object[] {
                                fElementQName.rawname,
                                name.rawname },
                            XMLErrorReporter.SEVERITY_FATAL_ERROR);
                    }
                }
            }
        }

        // call handler
        
            if (empty) {

                //decrease the markup depth..
                fMarkupDepth--;

                // check that this element was opened in the same entity
                if (fMarkupDepth < fEntityStack[fEntityDepth - 1]) {
                    reportFatalError(
                        "ElementEntityMismatch",
                        new Object[] { fCurrentElement.rawname });
                }

                fDocumentHandler.emptyElement(fElementQName, fAttributes, null);
                
                /*if (fBindNamespaces) {
                    fNamespaceContext.popContext();
                }*/
                fScanEndElement = true;
                
                //pop the element off the stack..
                fElementStack.popElement();
            } else {
                
                if(dtdGrammarUtil != null)
                    dtdGrammarUtil.startElement(fElementQName, fAttributes); 
                
                if (fDocumentHandler != null)
                fDocumentHandler.startElement(fElementQName, fAttributes, null);
            }
        
        if (DEBUG_START_END_ELEMENT)
            System.out.println("<<< scanStartElement(): " + empty);
        return empty;

    } // scanStartElement():boolean
    
    /**
     * Scans the name of an element in a start or empty tag. 
     * 
     * @see #scanStartElement()
     */
    protected void scanStartElementName ()
        throws IOException, XNIException {
        // Note: namespace processing is on by default
        fEntityScanner.scanQName(fElementQName);
        // Must skip spaces here because the DTD scanner
        // would consume them at the end of the external subset.
        fSawSpace = fEntityScanner.skipSpaces();
    } // scanStartElementName()
    
    /**
     * Scans the remainder of a start or empty tag after the element name.
     * 
     * @see #scanStartElement
     * @return True if element is empty.
     */    
    protected boolean scanStartElementAfterName()
        throws IOException, XNIException {

        // REVISIT - [Q] Why do we need this local variable? -- mrglavas
        String rawname = fElementQName.rawname;
        if (fBindNamespaces) {
            fNamespaceContext.pushContext();
            if (fScannerState == SCANNER_STATE_ROOT_ELEMENT) {
                if (fPerformValidation) {
                    fErrorReporter.reportError(
                        XMLMessageFormatter.XML_DOMAIN,
                        "MSG_GRAMMAR_NOT_FOUND",
                        new Object[] { rawname },
                        XMLErrorReporter.SEVERITY_ERROR);

                    if (fDoctypeName == null
                        || !fDoctypeName.equals(rawname)) {
                        fErrorReporter.reportError(
                            XMLMessageFormatter.XML_DOMAIN,
                            "RootElementTypeMustMatchDoctypedecl",
                            new Object[] { fDoctypeName, rawname },
                            XMLErrorReporter.SEVERITY_ERROR);
                    }
                }
            }
        }

        // push element stack
        fCurrentElement = fElementStack.pushElement(fElementQName);

        // attributes
        boolean empty = false;
        fAttributes.removeAllAttributes();
        do {
        	
            // end tag?
            int c = fEntityScanner.peekChar();
            if (c == '>') {
                fEntityScanner.scanChar();
                break;
            } else if (c == '/') {
                fEntityScanner.scanChar();
                if (!fEntityScanner.skipChar('>')) {
                    reportFatalError(
                        "ElementUnterminated",
                        new Object[] { rawname });
                }
                empty = true;
                break;
            } else if (!isValidNameStartChar(c) || !fSawSpace) {
                // Second chance. Check if this character is a high
                // surrogate of a valid name start character.
                if (!isValidNameStartHighSurrogate(c) || !fSawSpace) {
                    reportFatalError(
                        "ElementUnterminated",
                        new Object[] { rawname });
                }
            }

            // attributes
            scanAttribute(fAttributes);
            
            // spaces
            fSawSpace = fEntityScanner.skipSpaces();

        } while (true);

        if (fBindNamespaces) {
            // REVISIT: is it required? forbit xmlns prefix for element
            if (fElementQName.prefix == XMLSymbols.PREFIX_XMLNS) {
                fErrorReporter.reportError(
                    XMLMessageFormatter.XMLNS_DOMAIN,
                    "ElementXMLNSPrefix",
                    new Object[] { fElementQName.rawname },
                    XMLErrorReporter.SEVERITY_FATAL_ERROR);
            }

            // bind the element
            String prefix =
                fElementQName.prefix != null
                    ? fElementQName.prefix
                    : XMLSymbols.EMPTY_STRING;
            // assign uri to the element
            fElementQName.uri = fNamespaceContext.getURI(prefix);
            // make sure that object in the element stack is updated as well
            fCurrentElement.uri = fElementQName.uri;

            if (fElementQName.prefix == null && fElementQName.uri != null) {
                fElementQName.prefix = XMLSymbols.EMPTY_STRING;
                // making sure that the object in the element stack is updated too.
                fCurrentElement.prefix = XMLSymbols.EMPTY_STRING;
            }
            if (fElementQName.prefix != null && fElementQName.uri == null) {
                fErrorReporter.reportError(
                    XMLMessageFormatter.XMLNS_DOMAIN,
                    "ElementPrefixUnbound",
                    new Object[] {
                        fElementQName.prefix,
                        fElementQName.rawname },
                    XMLErrorReporter.SEVERITY_FATAL_ERROR);
            }

            // bind attributes (xmlns are already bound bellow)
            int length = fAttributes.getLength();
            for (int i = 0; i < length; i++) {
                fAttributes.getName(i, fAttributeQName);

                String aprefix =
                    fAttributeQName.prefix != null
                        ? fAttributeQName.prefix
                        : XMLSymbols.EMPTY_STRING;
                String uri = fNamespaceContext.getURI(aprefix);
                // REVISIT: try removing the first "if" and see if it is faster.
                //
                if (fAttributeQName.uri != null
                    && fAttributeQName.uri == uri) {
                    continue;
                }
                if (aprefix != XMLSymbols.EMPTY_STRING) {
                    fAttributeQName.uri = uri;
                    if (uri == null) {
                        fErrorReporter.reportError(
                            XMLMessageFormatter.XMLNS_DOMAIN,
                            "AttributePrefixUnbound",
                            new Object[] {
                                fElementQName.rawname,
                                fAttributeQName.rawname,
                                aprefix },
                            XMLErrorReporter.SEVERITY_FATAL_ERROR);
                    }
                    fAttributes.setURI(i, uri);
                }
            }

            if (length > 1) {
                QName name = fAttributes.checkDuplicatesNS();
                if (name != null) {
                    if (name.uri != null) {
                        fErrorReporter.reportError(
                            XMLMessageFormatter.XMLNS_DOMAIN,
                            "AttributeNSNotUnique",
                            new Object[] {
                                fElementQName.rawname,
                                name.localpart,
                                name.uri },
                            XMLErrorReporter.SEVERITY_FATAL_ERROR);
                    } else {
                        fErrorReporter.reportError(
                            XMLMessageFormatter.XMLNS_DOMAIN,
                            "AttributeNotUnique",
                            new Object[] {
                                fElementQName.rawname,
                                name.rawname },
                            XMLErrorReporter.SEVERITY_FATAL_ERROR);
                    }
                }
            }
        }

        // call handler
        if (fDocumentHandler != null) {
            if (empty) {

                //decrease the markup depth..
                fMarkupDepth--;

                // check that this element was opened in the same entity
                if (fMarkupDepth < fEntityStack[fEntityDepth - 1]) {
                    reportFatalError(
                        "ElementEntityMismatch",
                        new Object[] { fCurrentElement.rawname });
                }

                fDocumentHandler.emptyElement(fElementQName, fAttributes, null);

                if (fBindNamespaces) {
                    fNamespaceContext.popContext();
                }
                //pop the element off the stack..
                fElementStack.popElement();
            } else {
                fDocumentHandler.startElement(fElementQName, fAttributes, null);
            }
        }

        if (DEBUG_START_END_ELEMENT)
            System.out.println("<<< scanStartElementAfterName(): " + empty);
        return empty;
        
    } // scanStartElementAfterName()

    /**
     * Scans an attribute.
     * <p>
     * <pre>
     * [41] Attribute ::= Name Eq AttValue
     * </pre>
     * <p>
     * <strong>Note:</strong> This method assumes that the next
     * character on the stream is the first character of the attribute
     * name.
     * <p>
     * <strong>Note:</strong> This method uses the fAttributeQName and
     * fQName variables. The contents of these variables will be
     * destroyed.
     *
     * @param attributes The attributes list for the scanned attribute.
     */
    protected void scanAttribute(XMLAttributesImpl attributes)
        throws IOException, XNIException {
        if (DEBUG_START_END_ELEMENT)
            System.out.println(">>> scanAttribute()");

        // name
        fEntityScanner.scanQName(fAttributeQName);

        // equals
        fEntityScanner.skipSpaces();
        if (!fEntityScanner.skipChar('=')) {
            reportFatalError(
                "EqRequiredInAttribute",
                new Object[] {