xmldocumentfragmentscannerimpl.java

java1.6众多例子参考

                reportFatalError("ElementUnterminated",
                        new Object[]{fElementQName.rawname});
            }
            fEmptyElement = true;
            return true;
        } else if (!isValidNameStartChar(c) || !sawSpace) {
            reportFatalError("ElementUnterminated", new Object[]{fElementQName.rawname});
        }
        
        return false;
    }
    
    public boolean hasAttributes(){
        return fAttributes.getLength() > 0 ? true : false ;
    }
    
    
    /**
     * 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(AttributeIteratorImpl attributes)
     * throws IOException, XNIException {
     * if (DEBUG_START_END_ELEMENT) System.out.println(">>> scanAttribute()");
     *
     *
     * // name
     * if (fNamespaces) {
     * fEntityScanner.scanQName(fAttributeQName);
     * }
     * else {
     * String name = fEntityScanner.scanName();
     * fAttributeQName.setValues(null, name, name, null);
     * }
     *
     * // equals
     * fEntityScanner.skipSpaces();
     * if (!fEntityScanner.skipChar('=')) {
     * reportFatalError("EqRequiredInAttribute",
     * new Object[]{fAttributeQName.rawname});
     * }
     * fEntityScanner.skipSpaces();
     *
     *
     * // content
     * int oldLen = attributes.getLength();
     */
    /**xxx there is one check of duplicate attribute that has been removed.
     * attributes.addAttribute(fAttributeQName, XMLSymbols.fCDATASymbol, null);
     *
     * // WFC: Unique Att Spec
     * if (oldLen == attributes.getLength()) {
     * reportFatalError("AttributeNotUnique",
     * new Object[]{fCurrentElement.rawname,
     * fAttributeQName.rawname});
     * }
     */
    
    /*
        //REVISIT: one more case needs to be included: external PE and standalone is no
        boolean isVC =  fHasExternalDTD && !fStandalone;
        scanAttributeValue(fTempString, fTempString2,
                           fAttributeQName.rawname, attributes,
                           oldLen, isVC);
     
        //attributes.setValue(oldLen, fTempString.toString());
        //attributes.setNonNormalizedValue(oldLen, fTempString2.toString());
        //attributes.setSpecified(oldLen, true);
     
        AttributeImpl attribute = new AttributeImpl(fAttributeQName.prefix,fAttributeQName.localpart,fAttributeQName.uri,fTempString.toString(),fTempString2.toString(),XMLSymbols.fCDATASymbol,true);
        fAttributes.addAttribute(attribute);
        if (DEBUG_START_END_ELEMENT) System.out.println("<<< scanAttribute()");
    } // scanAttribute(XMLAttributes)
     
     */
    
    /** return the attribute iterator implementation */
    public XMLAttributesIteratorImpl getAttributeIterator(){
        if(dtdGrammarUtil != null && fAddDefaultAttr){
            dtdGrammarUtil.addDTDDefaultAttrs(fElementQName,fAttributes);
            fAddDefaultAttr = false;
        }
        return fAttributes;
    }
    
    /** return if the doucment is standalone */
    public boolean isStandAlone(){
        return fStandalone ;
    }
    /**
     * Scans an attribute name value pair.
     * <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(XMLAttributes attributes)
    throws IOException, XNIException {
        if (DEBUG_START_END_ELEMENT) System.out.println(this.getClass().toString() +">>> scanAttribute()");
        
        // name
        if (fNamespaces) {
            fEntityScanner.scanQName(fAttributeQName);
        } else {
            String name = fEntityScanner.scanName();
            fAttributeQName.setValues(null, name, name, null);
        }
        
        // equals
        fEntityScanner.skipSpaces();
        if (!fEntityScanner.skipChar('=')) {
            reportFatalError("EqRequiredInAttribute",
                new Object[] {fCurrentElement.rawname, fAttributeQName.rawname});
        }
        fEntityScanner.skipSpaces();
        
        int attIndex = 0 ;
        //REVISIT: one more case needs to be included: external PE and standalone is no
        boolean isVC =  fHasExternalDTD && !fStandalone;
        //fTempString would store attribute value
        ///fTempString2 would store attribute non-normalized value
        
        //this function doesn't use 'attIndex'. We are adding the attribute later
        //after we have figured out that current attribute is not namespace declaration
        //since scanAttributeValue doesn't use attIndex parameter therefore we
        //can safely add the attribute later..
        XMLString tmpStr = getString();
        
        scanAttributeValue(tmpStr, fTempString2,
                fAttributeQName.rawname, attributes,
                attIndex, isVC);

        // content
        int oldLen = attributes.getLength();
        //if the attribute name already exists.. new value is replaced with old value
        attIndex = attributes.addAttribute(fAttributeQName, XMLSymbols.fCDATASymbol, null);
        
        // WFC: Unique Att Spec
        //attributes count will be same if the current attribute  name already exists for this element name.
        //this means there are two duplicate attributes.
        if (oldLen == attributes.getLength()) {
            reportFatalError("AttributeNotUnique",
                    new Object[]{fCurrentElement.rawname,
                            fAttributeQName.rawname});
        }
        
        //tmpString contains attribute value
        //we are passing null as the attribute value
        attributes.setValue(attIndex, null, tmpStr);

        ///xxx: nonNormalizedValue is not being set as it is not required by SAX & DOM
        //attributes.setNonNormalizedValue(oldLen, fTempString2.toString());
        attributes.setSpecified(attIndex, true);
        
        if (DEBUG_START_END_ELEMENT) System.out.println(this.getClass().toString() +"<<< scanAttribute()");
        
    } // scanAttribute(XMLAttributes)
    
    /**
     * Scans element content.
     *
     * @return Returns the next character on the stream.
     */
    //CHANGED:
    //EARLIER: scanContent()
    //NOW: scanContent(XMLStringBuffer)
    //It makes things easy if this functions takes XMLStringBuffer as parameter..
    //this function appends the data to the buffer.
    protected int scanContent(XMLStringBuffer content) throws IOException, XNIException {
        //set the fTempString length to 0 before passing it on to scanContent
        //scanContent sets the correct co-ordinates as per the content read
        fTempString.length = 0;
        int c = fEntityScanner.scanContent(fTempString);
        content.append(fTempString);
        fTempString.length = 0;
        if (c == '\r') {
            // happens when there is the character reference &#13;
            //xxx: We know the next chracter.. we should just skip it and add ']' directlry
            fEntityScanner.scanChar();
            content.append((char)c);
            c = -1;
        } else if (c == ']') {
            //fStringBuffer.clear();
            //xxx: We know the next chracter.. we should just skip it and add ']' directlry
            content.append((char)fEntityScanner.scanChar());
            // remember where we are in case we get an endEntity before we
            // could flush the buffer out - this happens when we're parsing an
            // entity which ends with a ]
            fInScanContent = true;
            //
            // We work on a single character basis to handle cases such as:
            // ']]]>' which we might otherwise miss.
            //
            if (fEntityScanner.skipChar(']')) {
                content.append(']');
                while (fEntityScanner.skipChar(']')) {
                    content.append(']');
                }
                if (fEntityScanner.skipChar('>')) {
                    reportFatalError("CDEndInContent", null);
                }
            }
            fInScanContent = false;
            c = -1;
        }
        if (fDocumentHandler != null && content.length > 0) {
            //fDocumentHandler.characters(content, null);
        }
        return c;
        
    } // scanContent():int
    
    
    /**
     * Scans a CDATA section.
     * <p>
     * <strong>Note:</strong> This method uses the fTempString and
     * fStringBuffer variables.
     *
     * @param complete True if the CDATA section is to be scanned
     *                 completely.
     *
     * @return True if CDATA is completely scanned.
     */
    //CHANGED:
    protected boolean scanCDATASection(XMLStringBuffer contentBuffer, boolean complete)
    throws IOException, XNIException {
        
        // call handler
        if (fDocumentHandler != null) {
            //fDocumentHandler.startCDATA(null);
        }
        
        while (true) {
            //scanData will fill the contentBuffer
            if (!fEntityScanner.scanData("]]>", contentBuffer)) {
                break ;
                /** We dont need all this code if we pass ']]>' as delimeter..
                 * int brackets = 2;
                 * while (fEntityScanner.skipChar(']')) {
                 * brackets++;
                 * }
                 *
                 * //When we find more than 2 square brackets
                 * if (fDocumentHandler != null && brackets > 2) {
                 * //we dont need to clear the buffer..
                 * //contentBuffer.clear();
                 * for (int i = 2; i < brackets; i++) {
                 * contentBuffer.append(']');
                 * }
                 * fDocumentHandler.characters(contentBuffer, null);
                 * }
                 *
                 * if (fEntityScanner.skipChar('>')) {
                 * break;
                 * }
                 * if (fDocumentHandler != null) {
                 * //we dont need to clear the buffer now..
                 * //contentBuffer.clear();
                 * contentBuffer.append("]]");
                 * fDocumentHandler.characters(contentBuffer, null);
                 * }
                 **/
            } else {
                int c = fEntityScanner.peekChar();
                if (c != -1 && isInvalidLiteral(c)) {
                    if (XMLChar.isHighSurrogate(c)) {
                        //contentBuffer.clear();
                        //scan surrogates if any....
                        scanSurrogates(contentBuffer);
                    } else {
                        reportFatalError("InvalidCharInCDSect",
                                new Object[]{Integer.toString(c,16)});
                                fEntityScanner.scanChar();
                    }
                }
                //by this time we have also read surrogate contents if any...
                if (fDocumentHandler != null) {
                    //fDocumentHandler.characters(contentBuffer, null);
                }
            }
        }
        fMarkupDepth--;
        
        if (fDocumentHandler != null && contentBuffer.length > 0) {
            //fDocumentHandler.characters(contentBuffer, null);
        }
        
        // call handler
        if (fDocumentHandler != null) {
            //fDocumentHandler.endCDATA(null);
        }
        
        return true;
        
    } // scanCDATASection(XMLStringBuffer, boolean):boolean
    
    /**
     * Scans an end element.
     * <p>
     * <pre>
     * [42] ETag ::= '&lt;/' Name S? '>'
     * </pre>
     * <p>
     * <strong>Note:</strong> This method uses the fElementQName variable.
     * The contents of this variable will be destroyed. The caller should
     * copy the needed information out of this variable before calling
     * this method.
     *
     * @return The element depth.
     */
    protected int scanEndElement() throws IOException, XNIException {
        if (DEBUG_START_END_ELEMENT) System.out.println(this.getClass().toString() +">>> scanEndElement()");
        
        // pop context
        QName endElementName = fElementStack.popElement();
        
        String rawname = endElementName.rawname;
        if(DEBUG)System.ou