xmldtdscannerimpl.java

java1.6众多例子参考

            fErrorReporter.reportError( XMLMessageFormatter.XML_DOMAIN,"EntityNotDeclared",
            new Object[]{name}, XMLErrorReporter.SEVERITY_ERROR);
        }
        fEntityManager.startEntity(fSymbolTable.addSymbol(pName),
        literal);
        // if we actually got a new entity and it's external
        // parse text decl if there is any
        if (depth != fPEDepth && fEntityScanner.isExternal()) {
            scanTextDecl();
        }
    }
    
    /**
     * Dispatch an XML "event".
     *
     * @param complete True if this method is intended to scan
     *                 and dispatch as much as possible.
     *
     * @return True if a TextDecl was scanned.
     *
     * @throws IOException  Thrown on i/o error.
     * @throws XNIException Thrown on parse error.
     *
     */
    protected final boolean scanTextDecl()
    throws IOException, XNIException {
        
        // scan XMLDecl
        boolean textDecl = false;
        if (fEntityScanner.skipString("<?xml")) {
            fMarkUpDepth++;
            // NOTE: special case where document starts with a PI
            //       whose name starts with "xml" (e.g. "xmlfoo")
            if (isValidNameChar(fEntityScanner.peekChar())) {
                fStringBuffer.clear();
                fStringBuffer.append("xml");
                while (isValidNameChar(fEntityScanner.peekChar())) {
                    fStringBuffer.append((char)fEntityScanner.scanChar());
                }
                String target =
                fSymbolTable.addSymbol(fStringBuffer.ch,
                fStringBuffer.offset,
                fStringBuffer.length);
                scanPIData(target, fString);
            }
            
            // standard Text declaration
            else {
                // pseudo-attribute values
                String version = null;
                String encoding = null;
                
                scanXMLDeclOrTextDecl(true, fStrings);
                textDecl = true;
                fMarkUpDepth--;
                
                version = fStrings[0];
                encoding = fStrings[1];
                
                fEntityScanner.setEncoding(encoding);
                
                // call handler
                if (fDTDHandler != null) {
                    fDTDHandler.textDecl(version, encoding, null);
                }
            }
        }
        fEntityManager.fCurrentEntity.mayReadChunks = true;
        
        return textDecl;
        
    } // scanTextDecl(boolean):boolean
    
    /**
     * Scans a processing data. This is needed to handle the situation
     * where a document starts with a processing instruction whose
     * target name <em>starts with</em> "xml". (e.g. xmlfoo)
     *
     * @param target The PI target
     * @param data The string to fill in with the data
     */
    protected final void scanPIData(String target, XMLString data)
    throws IOException, XNIException {
        //Venu REVISIT
        //      super.scanPIData(target, data);
        fMarkUpDepth--;
        
        // call handler
        if (fDTDHandler != null) {
            fDTDHandler.processingInstruction(target, data, null);
        }
        
    } // scanPIData(String)
    
    /**
     * Scans a comment.
     * <p>
     * <pre>
     * [15] Comment ::= '&lt!--' ((Char - '-') | ('-' (Char - '-')))* '-->'
     * </pre>
     * <p>
     * <strong>Note:</strong> Called after scanning past '&lt;!--'
     */
    protected final void scanComment() throws IOException, XNIException {
        
        fReportEntity = false;
        scanComment(fStringBuffer);
        fMarkUpDepth--;
        
        // call handler
        if (fDTDHandler != null) {
            fDTDHandler.comment(fStringBuffer, null);
        }
        fReportEntity = true;
        
    } // scanComment()
    
    /**
     * Scans an element declaration
     * <p>
     * <pre>
     * [45]    elementdecl    ::=    '&lt;!ELEMENT' S Name S contentspec S? '>'
     * [46]    contentspec    ::=    'EMPTY' | 'ANY' | Mixed | children
     * </pre>
     * <p>
     * <strong>Note:</strong> Called after scanning past '&lt;!ELEMENT'
     */
    protected final void scanElementDecl() throws IOException, XNIException {
        
        // spaces
        fReportEntity = false;
        if (!skipSeparator(true, !scanningInternalSubset())) {
            reportFatalError("MSG_SPACE_REQUIRED_BEFORE_ELEMENT_TYPE_IN_ELEMENTDECL",
            null);
        }
        
        // element name
        String name = fEntityScanner.scanName();
        if (name == null) {
            reportFatalError("MSG_ELEMENT_TYPE_REQUIRED_IN_ELEMENTDECL",
            null);
        }
        
        // spaces
        if (!skipSeparator(true, !scanningInternalSubset())) {
            reportFatalError("MSG_SPACE_REQUIRED_BEFORE_CONTENTSPEC_IN_ELEMENTDECL",
            new Object[]{name});
        }
        
        // content model
        if (fDTDContentModelHandler != null) {
            fDTDContentModelHandler.startContentModel(name, null);
        }
        String contentModel = null;
        fReportEntity = true;
        if (fEntityScanner.skipString("EMPTY")) {
            contentModel = "EMPTY";
            // call handler
            if (fDTDContentModelHandler != null) {
                fDTDContentModelHandler.empty(null);
            }
        }
        else if (fEntityScanner.skipString("ANY")) {
            contentModel = "ANY";
            // call handler
            if (fDTDContentModelHandler != null) {
                fDTDContentModelHandler.any(null);
            }
        }
        else {
            if (!fEntityScanner.skipChar('(')) {
                reportFatalError("MSG_OPEN_PAREN_OR_ELEMENT_TYPE_REQUIRED_IN_CHILDREN",
                new Object[]{name});
            }
            if (fDTDContentModelHandler != null) {
                fDTDContentModelHandler.startGroup(null);
            }
            fStringBuffer.clear();
            fStringBuffer.append('(');
            fMarkUpDepth++;
            skipSeparator(false, !scanningInternalSubset());
            
            // Mixed content model
            if (fEntityScanner.skipString("#PCDATA")) {
                scanMixed(name);
            }
            else {              // children content
                scanChildren(name);
            }
            contentModel = fStringBuffer.toString();
        }
        
        // call handler
        if (fDTDContentModelHandler != null) {
            fDTDContentModelHandler.endContentModel(null);
        }
        
        fReportEntity = false;
        skipSeparator(false, !scanningInternalSubset());
        // end
        if (!fEntityScanner.skipChar('>')) {
            reportFatalError("ElementDeclUnterminated", new Object[]{name});
        }
        fReportEntity = true;
        fMarkUpDepth--;
        
        // call handler
        if (fDTDHandler != null) {
            fDTDHandler.elementDecl(name, contentModel, null);
        }
        if (nonValidatingMode) nvGrammarInfo.elementDecl(name, contentModel, null);
    } // scanElementDecl()
    
    /**
     * scan Mixed content model
     * This assumes the content model has been parsed up to #PCDATA and
     * can simply append to fStringBuffer.
     * <pre>
     * [51]    Mixed    ::=    '(' S? '#PCDATA' (S? '|' S? Name)* S? ')*'
     *                       | '(' S? '#PCDATA' S? ')'
     * </pre>
     *
     * @param elName The element type name this declaration is about.
     *
     * <strong>Note:</strong> Called after scanning past '(#PCDATA'.
     */
    private final void scanMixed(String elName)
    throws IOException, XNIException {
        
        String childName = null;
        
        fStringBuffer.append("#PCDATA");
        // call handler
        if (fDTDContentModelHandler != null) {
            fDTDContentModelHandler.pcdata(null);
        }
        skipSeparator(false, !scanningInternalSubset());
        while (fEntityScanner.skipChar('|')) {
            fStringBuffer.append('|');
            // call handler
            if (fDTDContentModelHandler != null) {
                fDTDContentModelHandler.separator(XMLDTDContentModelHandler.SEPARATOR_CHOICE,
                null);
            }
            skipSeparator(false, !scanningInternalSubset());
            
            childName = fEntityScanner.scanName();
            if (childName == null) {
                reportFatalError("MSG_ELEMENT_TYPE_REQUIRED_IN_MIXED_CONTENT",
                new Object[]{elName});
            }
            fStringBuffer.append(childName);
            // call handler
            if (fDTDContentModelHandler != null) {
                fDTDContentModelHandler.element(childName, null);
            }
            skipSeparator(false, !scanningInternalSubset());
        }
        // The following check must be done in a single call (as opposed to one
        // for ')' and then one for '*') to guarantee that callbacks are
        // properly nested. We do not want to trigger endEntity too early in
        // case we cross the boundary of an entity between the two characters.
        if (fEntityScanner.skipString(")*")) {
            fStringBuffer.append(")*");
            // call handler
            if (fDTDContentModelHandler != null) {
                fDTDContentModelHandler.endGroup(null);
                fDTDContentModelHandler.occurrence(XMLDTDContentModelHandler.OCCURS_ZERO_OR_MORE,
                null);
            }
        }
        else if (childName != null) {
            reportFatalError("MixedContentUnterminated",
            new Object[]{elName});
        }
        else if (fEntityScanner.skipChar(')')){
            fStringBuffer.append(')');
            // call handler
            if (fDTDContentModelHandler != null) {
                fDTDContentModelHandler.endGroup(null);
            }
        }
        else {
            reportFatalError("MSG_CLOSE_PAREN_REQUIRED_IN_CHILDREN",
            new Object[]{elName});
        }
        fMarkUpDepth--;
        // we are done
    }
    
    /**
     * scan children content model
     * This assumes it can simply append to fStringBuffer.
     * <pre>
     * [47]    children  ::=    (choice | seq) ('?' | '*' | '+')?
     * [48]    cp        ::=    (Name | choice | seq) ('?' | '*' | '+')?
     * [49]    choice    ::=    '(' S? cp ( S? '|' S? cp )+ S? ')'
     * [50]    seq       ::=    '(' S? cp ( S? ',' S? cp )* S? ')'
     * </pre>
     *
     * @param elName The element type name this declaration is about.
     *
     * <strong>Note:</strong> Called after scanning past the first open
     * paranthesis.
     */
    private final void scanChildren(String elName)
    throws IOException, XNIException {
        
        fContentDepth = 0;
        pushContentStack(0);
        int currentOp = 0;
        int c;
        while (true) {
            if (fEntityScanner.skipChar('(')) {
                fMarkUpDepth++;
                fStringBuffer.append('(');
                // call handler
                if (fDTDContentModelHandler != null) {
                    fDTDContentModelHandler.startGroup(null);
                }
                // push current op on stack and reset it
                pushContentStack(currentOp);
                currentOp = 0;
                skipSeparator(false, !scanningInternalSubset());
                continue;
            }
            skipSeparator(false, !scanningInternalSubset());
            String childName = fEntityScanner.scanName();
            if (childName == null) {
                reportFatalError("MSG_OPEN_PAREN_OR_ELEMENT_TYPE_REQUIRED_IN_CHILDREN",
                new Object[]{elName});
                return;
            }
            // call handler
            if (fDTDContentModelHandler != null) {
                fDTDContentModelHandler.element(childName, null);
            }
            fStringBuffer.append(childName);
            c = fEntityScanner.peekChar();
            if (c == '?' || c == '*' || c == '+') {
                // call handler
                if (fDTDContentModelHandler != null) {
                    short oc;
                    if (c == '?') {
                        oc = XMLDTDContentModelHandler.OCCURS_ZERO_OR_ONE;
                    }
                    else if (c == '*') {
                        oc = XMLDTDContentModelHandler.OCCURS_ZERO_OR_MORE;
                    }
                    else {
                        oc = XMLDTDContentModelHandler.OCCURS_ONE_OR_MORE;
                    }
                    fDTDContentModelHandler.occurrence(oc, null);
                }
                fEntityScanner.scanChar();
                fStringBuffer.append((char)c);
            }
            while (true) {
                skipSeparator(false, !scanningInternalSubset());