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XMLScanner.javaAPI DocApache Xerces 3.0.158876Fri Sep 14 20:33:56 BST 2007org.apache.xerces.impl

XMLScanner

public abstract class XMLScanner extends Object implements org.apache.xerces.xni.parser.XMLComponent
This class is responsible for holding scanning methods common to scanning the XML document structure and content as well as the DTD structure and content. Both XMLDocumentScanner and XMLDTDScanner inherit from this base class.

This component requires the following features and properties from the component manager that uses it:

  • http://xml.org/sax/features/validation
  • http://xml.org/sax/features/namespaces
  • http://apache.org/xml/features/scanner/notify-char-refs
  • http://apache.org/xml/properties/internal/symbol-table
  • http://apache.org/xml/properties/internal/error-reporter
  • http://apache.org/xml/properties/internal/entity-manager
xerces.internal
author
Andy Clark, IBM
author
Arnaud Le Hors, IBM
author
Eric Ye, IBM
version
$Id: XMLScanner.java 572055 2007-09-02 17:55:43Z mrglavas $

Fields Summary
protected static final String
VALIDATION
Feature identifier: validation.
protected static final String
NAMESPACES
Feature identifier: namespaces.
protected static final String
NOTIFY_CHAR_REFS
Feature identifier: notify character references.
protected static final String
PARSER_SETTINGS
protected static final String
SYMBOL_TABLE
Property identifier: symbol table.
protected static final String
ERROR_REPORTER
Property identifier: error reporter.
protected static final String
ENTITY_MANAGER
Property identifier: entity manager.
protected static final boolean
DEBUG_ATTR_NORMALIZATION
Debug attribute normalization.
protected boolean
fValidation
Validation. This feature identifier is: http://xml.org/sax/features/validation
protected boolean
fNamespaces
Namespaces.
protected boolean
fNotifyCharRefs
Character references notification.
protected boolean
fParserSettings
Internal parser-settings feature
protected org.apache.xerces.util.SymbolTable
fSymbolTable
Symbol table.
protected XMLErrorReporter
fErrorReporter
Error reporter.
protected XMLEntityManager
fEntityManager
Entity manager.
protected XMLEntityScanner
fEntityScanner
Entity scanner.
protected int
fEntityDepth
Entity depth.
protected String
fCharRefLiteral
Literal value of the last character refence scanned.
protected boolean
fScanningAttribute
Scanning attribute.
protected boolean
fReportEntity
Report entity boundary.
protected static final String
fVersionSymbol
Symbol: "version".
protected static final String
fEncodingSymbol
Symbol: "encoding".
protected static final String
fStandaloneSymbol
Symbol: "standalone".
protected static final String
fAmpSymbol
Symbol: "amp".
protected static final String
fLtSymbol
Symbol: "lt".
protected static final String
fGtSymbol
Symbol: "gt".
protected static final String
fQuotSymbol
Symbol: "quot".
protected static final String
fAposSymbol
Symbol: "apos".
private final org.apache.xerces.xni.XMLString
fString
String.
private final org.apache.xerces.util.XMLStringBuffer
fStringBuffer
String buffer.
private final org.apache.xerces.util.XMLStringBuffer
fStringBuffer2
String buffer.
private final org.apache.xerces.util.XMLStringBuffer
fStringBuffer3
String buffer.
protected final org.apache.xerces.util.XMLResourceIdentifierImpl
fResourceIdentifier
Constructors Summary
Methods Summary
public voidendEntity(java.lang.String name, org.apache.xerces.xni.Augmentations augs)
This method notifies the end of an entity. The document entity has the pseudo-name of "[xml]" the DTD has the pseudo-name of "[dtd]" parameter entity names start with '%'; and general entities are just specified by their name.

param
name The name of the entity.
param
augs Additional information that may include infoset augmentations
throws
XNIException Thrown by handler to signal an error.


        // keep track of the entity depth
        fEntityDepth--;
public booleangetFeature(java.lang.String featureId)

            
        if (VALIDATION.equals(featureId)) {
            return fValidation;
        } else if (NOTIFY_CHAR_REFS.equals(featureId)) {
            return fNotifyCharRefs;
        }
        throw new XMLConfigurationException(XMLConfigurationException.NOT_RECOGNIZED, featureId);
protected java.lang.StringgetVersionNotSupportedKey()

        return "VersionNotSupported";
private voidinit()

 
        fEntityScanner = null;       
        // initialize vars
        fEntityDepth = 0;
        fReportEntity = true;
        fResourceIdentifier.clear();
protected booleanisInvalid(int value)

        return (XMLChar.isInvalid(value));
protected booleanisInvalidLiteral(int value)

        return (XMLChar.isInvalid(value));
protected intisUnchangedByNormalization(org.apache.xerces.xni.XMLString value)
Checks whether this string would be unchanged by normalization.

return
-1 if the value would be unchanged by normalization, otherwise the index of the first whitespace character which would be transformed.

        int end = value.offset + value.length;
        for (int i = value.offset; i < end; ++i) {
            int c = value.ch[i];
            // Performance: For XML 1.0 documents take advantage of 
            // the fact that the only legal characters below 0x20 
            // are 0x09 (TAB), 0x0A (LF) and 0x0D (CR). Since we've 
            // already determined the well-formedness of these
            // characters it is sufficient (and safe) to check
            // against 0x20. -- mrglavas
            if (c < 0x20) {
                return i - value.offset;
            }
        }
        return -1;
protected booleanisValidNCName(int value)

        return (XMLChar.isNCName(value));
protected booleanisValidNameChar(int value)

        return (XMLChar.isName(value));
protected booleanisValidNameStartChar(int value)

        return (XMLChar.isNameStart(value));
protected booleanisValidNameStartHighSurrogate(int value)

        return false;
protected voidnormalizeWhitespace(org.apache.xerces.xni.XMLString value)
Normalize whitespace in an XMLString converting all whitespace characters to space characters.

        int end = value.offset + value.length;
        for (int i = value.offset; i < end; ++i) {
            int c = value.ch[i];
            // Performance: For XML 1.0 documents take advantage of 
            // the fact that the only legal characters below 0x20 
            // are 0x09 (TAB), 0x0A (LF) and 0x0D (CR). Since we've 
            // already determined the well-formedness of these
            // characters it is sufficient (and safe) to check
            // against 0x20. -- mrglavas
            if (c < 0x20) {
                value.ch[i] = ' ";
            }
        }
protected voidnormalizeWhitespace(org.apache.xerces.xni.XMLString value, int fromIndex)
Normalize whitespace in an XMLString converting all whitespace characters to space characters.

        int end = value.offset + value.length;
        for (int i = value.offset + fromIndex; i < end; ++i) {
            int c = value.ch[i];
            // Performance: For XML 1.0 documents take advantage of 
            // the fact that the only legal characters below 0x20 
            // are 0x09 (TAB), 0x0A (LF) and 0x0D (CR). Since we've 
            // already determined the well-formedness of these
            // characters it is sufficient (and safe) to check
            // against 0x20. -- mrglavas
            if (c < 0x20) {
                value.ch[i] = ' ";
            }
        }
protected voidreportFatalError(java.lang.String msgId, java.lang.Object[] args)
Convenience function used in all XML scanners.

        fErrorReporter.reportError(XMLMessageFormatter.XML_DOMAIN,
                                   msgId, args,
                                   XMLErrorReporter.SEVERITY_FATAL_ERROR);
public voidreset(org.apache.xerces.xni.parser.XMLComponentManager componentManager)

param
componentManager The component manager.
throws
SAXException Throws exception if required features and properties cannot be found.


    //
    // XMLComponent methods
    //

                                                 
       
          

		try {
			fParserSettings = componentManager.getFeature(PARSER_SETTINGS);
		} catch (XMLConfigurationException e) {
			fParserSettings = true;
		}

		if (!fParserSettings) {
			// parser settings have not been changed
			init();
			return;
		}

        // Xerces properties
        fSymbolTable = (SymbolTable)componentManager.getProperty(SYMBOL_TABLE);
        fErrorReporter = (XMLErrorReporter)componentManager.getProperty(ERROR_REPORTER);
        fEntityManager = (XMLEntityManager)componentManager.getProperty(ENTITY_MANAGER);

        // sax features
        try {
            fValidation = componentManager.getFeature(VALIDATION);
        }
        catch (XMLConfigurationException e) {
            fValidation = false;
        }
        try {
            fNamespaces = componentManager.getFeature(NAMESPACES);
        }
        catch (XMLConfigurationException e) {
            fNamespaces = true;
        }
        try {
            fNotifyCharRefs = componentManager.getFeature(NOTIFY_CHAR_REFS);
        }
        catch (XMLConfigurationException e) {
            fNotifyCharRefs = false;
        }
        
        init();
protected voidreset()

        init();

        // DTD preparsing defaults:
        fValidation = true;
        fNotifyCharRefs = false;
protected booleanscanAttributeValue(org.apache.xerces.xni.XMLString value, org.apache.xerces.xni.XMLString nonNormalizedValue, java.lang.String atName, boolean checkEntities, java.lang.String eleName)
Scans an attribute value and normalizes whitespace converting all whitespace characters to space characters. [10] AttValue ::= '"' ([^<&"] | Reference)* '"' | "'" ([^<&'] | Reference)* "'"

param
value The XMLString to fill in with the value.
param
nonNormalizedValue The XMLString to fill in with the non-normalized value.
param
atName The name of the attribute being parsed (for error msgs).
param
checkEntities true if undeclared entities should be reported as VC violation, false if undeclared entities should be reported as WFC violation.
param
eleName The name of element to which this attribute belongs.
return
true if the non-normalized and normalized value are the same Note: This method uses fStringBuffer2, anything in it at the time of calling is lost.

        // quote
        int quote = fEntityScanner.peekChar();
        if (quote != '\'" && quote != '"") {
			reportFatalError("OpenQuoteExpected", new Object[]{eleName,atName});
        }

        fEntityScanner.scanChar();
        int entityDepth = fEntityDepth;

        int c = fEntityScanner.scanLiteral(quote, value);
        if (DEBUG_ATTR_NORMALIZATION) {
            System.out.println("** scanLiteral -> \""
                               + value.toString() + "\"");
        }
        
        int fromIndex = 0;
        if (c == quote && (fromIndex = isUnchangedByNormalization(value)) == -1) {
            /** Both the non-normalized and normalized attribute values are equal. **/
            nonNormalizedValue.setValues(value);
            int cquote = fEntityScanner.scanChar();
            if (cquote != quote) {
                reportFatalError("CloseQuoteExpected", new Object[]{eleName,atName});
            }
            return true;
        }
        fStringBuffer2.clear();
        fStringBuffer2.append(value);
        normalizeWhitespace(value, fromIndex);
        if (DEBUG_ATTR_NORMALIZATION) {
            System.out.println("** normalizeWhitespace -> \""
                               + value.toString() + "\"");
        }
        if (c != quote) {
            fScanningAttribute = true;
            fStringBuffer.clear();
            do {
                fStringBuffer.append(value);
                if (DEBUG_ATTR_NORMALIZATION) {
                    System.out.println("** value2: \""
                                       + fStringBuffer.toString() + "\"");
                }
                if (c == '&") {
                    fEntityScanner.skipChar('&");
                    if (entityDepth == fEntityDepth) {
                        fStringBuffer2.append('&");
                    }
                    if (fEntityScanner.skipChar('#")) {
                        if (entityDepth == fEntityDepth) {
                            fStringBuffer2.append('#");
                        }
                        int ch = scanCharReferenceValue(fStringBuffer, fStringBuffer2);
                        if (ch != -1) {
                            if (DEBUG_ATTR_NORMALIZATION) {
                                System.out.println("** value3: \""
                                                   + fStringBuffer.toString()
                                                   + "\"");
                            }
                        }
                    }
                    else {
                        String entityName = fEntityScanner.scanName();
                        if (entityName == null) {
                            reportFatalError("NameRequiredInReference", null);
                        }
                        else if (entityDepth == fEntityDepth) {
                            fStringBuffer2.append(entityName);
                        }
                        if (!fEntityScanner.skipChar(';")) {
                            reportFatalError("SemicolonRequiredInReference",
                                             new Object []{entityName});
                        }
                        else if (entityDepth == fEntityDepth) {
                            fStringBuffer2.append(';");
                        }
                        if (entityName == fAmpSymbol) {
                            fStringBuffer.append('&");
                            if (DEBUG_ATTR_NORMALIZATION) {
                                System.out.println("** value5: \""
                                                   + fStringBuffer.toString()
                                                   + "\"");
                            }
                        }
                        else if (entityName == fAposSymbol) {
                            fStringBuffer.append('\'");
                            if (DEBUG_ATTR_NORMALIZATION) {
                                System.out.println("** value7: \""
                                                   + fStringBuffer.toString()
                                                   + "\"");
                            }
                        }
                        else if (entityName == fLtSymbol) {
                            fStringBuffer.append('<");
                            if (DEBUG_ATTR_NORMALIZATION) {
                                System.out.println("** value9: \""
                                                   + fStringBuffer.toString()
                                                   + "\"");
                            }
                        }
                        else if (entityName == fGtSymbol) {
                            fStringBuffer.append('>");
                            if (DEBUG_ATTR_NORMALIZATION) {
                                System.out.println("** valueB: \""
                                                   + fStringBuffer.toString()
                                                   + "\"");
                            }
                        }
                        else if (entityName == fQuotSymbol) {
                            fStringBuffer.append('"");
                            if (DEBUG_ATTR_NORMALIZATION) {
                                System.out.println("** valueD: \""
                                                   + fStringBuffer.toString()
                                                   + "\"");
                            }
                        }
                        else {
                            if (fEntityManager.isExternalEntity(entityName)) {
                                reportFatalError("ReferenceToExternalEntity",
                                                 new Object[] { entityName });
                            }
                            else {
                                if (!fEntityManager.isDeclaredEntity(entityName)) {
                                    //WFC & VC: Entity Declared
                                    if (checkEntities) {
                                        if (fValidation) {
                                            fErrorReporter.reportError(XMLMessageFormatter.XML_DOMAIN,
                                                                       "EntityNotDeclared",
                                                                       new Object[]{entityName},
                                                                       XMLErrorReporter.SEVERITY_ERROR);
                                        }
                                    }
                                    else {
                                        reportFatalError("EntityNotDeclared",
                                                         new Object[]{entityName});
                                    }
                                }
                                fEntityManager.startEntity(entityName, true);
                            }
                        }
                    }
                }
                else if (c == '<") {
                    reportFatalError("LessthanInAttValue",
									 new Object[] { eleName, atName });
                    fEntityScanner.scanChar();
                    if (entityDepth == fEntityDepth) {
                        fStringBuffer2.append((char)c);
                    }
                }
                else if (c == '%" || c == ']") {
                    fEntityScanner.scanChar();
                    fStringBuffer.append((char)c);
                    if (entityDepth == fEntityDepth) {
                        fStringBuffer2.append((char)c);
                    }
                    if (DEBUG_ATTR_NORMALIZATION) {
                        System.out.println("** valueF: \""
                                           + fStringBuffer.toString() + "\"");
                    }
                }
                else if (c == '\n" || c == '\r") {
                    fEntityScanner.scanChar();
                    fStringBuffer.append(' ");
                    if (entityDepth == fEntityDepth) {
                        fStringBuffer2.append('\n");
                    }
                }
                else if (c != -1 && XMLChar.isHighSurrogate(c)) {
                    fStringBuffer3.clear();
                    if (scanSurrogates(fStringBuffer3)) {
                        fStringBuffer.append(fStringBuffer3);
                        if (entityDepth == fEntityDepth) {
                            fStringBuffer2.append(fStringBuffer3);
                        }
                        if (DEBUG_ATTR_NORMALIZATION) {
                            System.out.println("** valueI: \""
                                               + fStringBuffer.toString()
                                               + "\"");
                        }
                    }
                }
                else if (c != -1 && isInvalidLiteral(c)) {
                    reportFatalError("InvalidCharInAttValue",
					new Object[] {eleName, atName, Integer.toString(c, 16)});
                    fEntityScanner.scanChar();
                    if (entityDepth == fEntityDepth) {
                        fStringBuffer2.append((char)c);
                    }
                }
                c = fEntityScanner.scanLiteral(quote, value);
                if (entityDepth == fEntityDepth) {
                    fStringBuffer2.append(value);
                }
                normalizeWhitespace(value);
            } while (c != quote || entityDepth != fEntityDepth);
            fStringBuffer.append(value);
            if (DEBUG_ATTR_NORMALIZATION) {
                System.out.println("** valueN: \""
                                   + fStringBuffer.toString() + "\"");
            }
            value.setValues(fStringBuffer);
            fScanningAttribute = false;
        }
        nonNormalizedValue.setValues(fStringBuffer2);

        // quote
        int cquote = fEntityScanner.scanChar();
        if (cquote != quote) {
			reportFatalError("CloseQuoteExpected", new Object[]{eleName,atName});
        }
        return nonNormalizedValue.equals(value.ch, value.offset, value.length);
protected intscanCharReferenceValue(org.apache.xerces.util.XMLStringBuffer buf, org.apache.xerces.util.XMLStringBuffer buf2)
Scans a character reference and append the corresponding chars to the specified buffer. 

[66] CharRef ::= '&#' [0-9]+ ';' | '&#x' [0-9a-fA-F]+ ';'
Note: This method uses fStringBuffer, anything in it at the time of calling is lost.

param
buf the character buffer to append chars to
param
buf2 the character buffer to append non-normalized chars to
return
the character value or (-1) on conversion failure


        // scan hexadecimal value
        boolean hex = false;
        if (fEntityScanner.skipChar('x")) {
            if (buf2 != null) { buf2.append('x"); }
            hex = true;
            fStringBuffer3.clear();
            boolean digit = true;
            
            int c = fEntityScanner.peekChar();
            digit = (c >= '0" && c <= '9") ||
                    (c >= 'a" && c <= 'f") ||
                    (c >= 'A" && c <= 'F");
            if (digit) {
                if (buf2 != null) { buf2.append((char)c); }
                fEntityScanner.scanChar();
                fStringBuffer3.append((char)c);
                
                do {
                    c = fEntityScanner.peekChar();
                    digit = (c >= '0" && c <= '9") ||
                            (c >= 'a" && c <= 'f") ||
                            (c >= 'A" && c <= 'F");
                    if (digit) {
                        if (buf2 != null) { buf2.append((char)c); }
                        fEntityScanner.scanChar();
                        fStringBuffer3.append((char)c);
                    }
                } while (digit);
            }
            else {
                reportFatalError("HexdigitRequiredInCharRef", null);
            }
        }

        // scan decimal value
        else {
            fStringBuffer3.clear();
            boolean digit = true;
            
            int c = fEntityScanner.peekChar();
            digit = c >= '0" && c <= '9";
            if (digit) {
                if (buf2 != null) { buf2.append((char)c); }
                fEntityScanner.scanChar();
                fStringBuffer3.append((char)c);
                
                do {
                    c = fEntityScanner.peekChar();
                    digit = c >= '0" && c <= '9";
                    if (digit) {
                        if (buf2 != null) { buf2.append((char)c); }
                        fEntityScanner.scanChar();
                        fStringBuffer3.append((char)c);
                    }
                } while (digit);
            }
            else {
                reportFatalError("DigitRequiredInCharRef", null);
            }
        }

        // end
        if (!fEntityScanner.skipChar(';")) {
            reportFatalError("SemicolonRequiredInCharRef", null);
        }
        if (buf2 != null) { buf2.append(';"); }
        
        // convert string to number
        int value = -1;
        try {
            value = Integer.parseInt(fStringBuffer3.toString(),
                                     hex ? 16 : 10);
            
            // character reference must be a valid XML character
            if (isInvalid(value)) {
            	StringBuffer errorBuf = new StringBuffer(fStringBuffer3.length + 1);
                if (hex) errorBuf.append('x");
                errorBuf.append(fStringBuffer3.ch, fStringBuffer3.offset, fStringBuffer3.length);
                reportFatalError("InvalidCharRef",
                                 new Object[]{errorBuf.toString()});
            }
        }
        catch (NumberFormatException e) {
            // Conversion failed, let -1 value drop through.
            // If we end up here, the character reference was invalid.
            StringBuffer errorBuf = new StringBuffer(fStringBuffer3.length + 1);
            if (hex) errorBuf.append('x");
            errorBuf.append(fStringBuffer3.ch, fStringBuffer3.offset, fStringBuffer3.length);
            reportFatalError("InvalidCharRef",
                             new Object[]{errorBuf.toString()});
        }

        // append corresponding chars to the given buffer
        if (!XMLChar.isSupplemental(value)) {
            buf.append((char) value);
        }
        else {
            // character is supplemental, split it into surrogate chars
            buf.append(XMLChar.highSurrogate(value));
            buf.append(XMLChar.lowSurrogate(value));
        }

        // char refs notification code
        if (fNotifyCharRefs && value != -1) {
            String literal = "#" + (hex ? "x" : "") + fStringBuffer3.toString();
            if (!fScanningAttribute) {
                fCharRefLiteral = literal;
            }
        }
                
        return value;
protected voidscanComment(org.apache.xerces.util.XMLStringBuffer text)
Scans a comment. 

[15] Comment ::= '<!--' ((Char - '-') | ('-' (Char - '-')))* '-->'

Note: Called after scanning past '<!--' Note: This method uses fString, anything in it at the time of calling is lost.

param
text The buffer to fill in with the text.


        // text
        // REVISIT: handle invalid character, eof
        text.clear();
        while (fEntityScanner.scanData("--", text)) {
            int c = fEntityScanner.peekChar();
            if (c != -1) {
                if (XMLChar.isHighSurrogate(c)) {
                    scanSurrogates(text);
                }
                else if (isInvalidLiteral(c)) {
                    reportFatalError("InvalidCharInComment",
                                     new Object[] { Integer.toHexString(c) }); 
                    fEntityScanner.scanChar();
                }
            } 
        }
        if (!fEntityScanner.skipChar('>")) {
            reportFatalError("DashDashInComment", null);
        }
protected voidscanExternalID(java.lang.String[] identifiers, boolean optionalSystemId)
Scans External ID and return the public and system IDs.

param
identifiers An array of size 2 to return the system id, and public id (in that order).
param
optionalSystemId Specifies whether the system id is optional. Note: This method uses fString and fStringBuffer, anything in them at the time of calling is lost.


        String systemId = null;
        String publicId = null;
        if (fEntityScanner.skipString("PUBLIC")) {
            if (!fEntityScanner.skipSpaces()) {
                reportFatalError("SpaceRequiredAfterPUBLIC", null);
            }
            scanPubidLiteral(fString);
            publicId = fString.toString();

            if (!fEntityScanner.skipSpaces() && !optionalSystemId) {
                reportFatalError("SpaceRequiredBetweenPublicAndSystem", null);
            }
        }

        if (publicId != null || fEntityScanner.skipString("SYSTEM")) {
            if (publicId == null && !fEntityScanner.skipSpaces()) {
                reportFatalError("SpaceRequiredAfterSYSTEM", null);
            }
            int quote = fEntityScanner.peekChar();
            if (quote != '\'" && quote != '"") {
                if (publicId != null && optionalSystemId) {
                    // looks like we don't have any system id
                    // simply return the public id
                    identifiers[0] = null;
                    identifiers[1] = publicId;
                    return;
                }
                reportFatalError("QuoteRequiredInSystemID", null);
            }
            fEntityScanner.scanChar();
            XMLString ident = fString;
            if (fEntityScanner.scanLiteral(quote, ident) != quote) {
                fStringBuffer.clear();
                do {
                    fStringBuffer.append(ident);
                    int c = fEntityScanner.peekChar();
                    if (XMLChar.isMarkup(c) || c == ']") {
                        fStringBuffer.append((char)fEntityScanner.scanChar());
                    }
                } while (fEntityScanner.scanLiteral(quote, ident) != quote);
                fStringBuffer.append(ident);
                ident = fStringBuffer;
            }
            systemId = ident.toString();
            if (!fEntityScanner.skipChar(quote)) {
                reportFatalError("SystemIDUnterminated", null);
            }
        }

        // store result in array
        identifiers[0] = systemId;
        identifiers[1] = publicId;
protected voidscanPI()
Scans a processing instruction. 

[16] PI ::= '<?' PITarget (S (Char* - (Char* '?>' Char*)))? '?>'
[17] PITarget ::= Name - (('X' | 'x') ('M' | 'm') ('L' | 'l'))
Note: This method uses fString, anything in it at the time of calling is lost.


        // target
        fReportEntity = false;
        String target = null;
        if(fNamespaces) {
            target = fEntityScanner.scanNCName();
        } else {
            target = fEntityScanner.scanName();
        }
        if (target == null) {
            reportFatalError("PITargetRequired", null);
        }

        // scan data
        scanPIData(target, fString);
        fReportEntity = true;
protected voidscanPIData(java.lang.String target, org.apache.xerces.xni.XMLString data)
Scans a processing data. This is needed to handle the situation where a document starts with a processing instruction whose target name starts with "xml". (e.g. xmlfoo) Note: This method uses fStringBuffer, anything in it at the time of calling is lost.

param
target The PI target
param
data The string to fill in with the data


        // check target
        if (target.length() == 3) {
            char c0 = Character.toLowerCase(target.charAt(0));
            char c1 = Character.toLowerCase(target.charAt(1));
            char c2 = Character.toLowerCase(target.charAt(2));
            if (c0 == 'x" && c1 == 'm" && c2 == 'l") {
                reportFatalError("ReservedPITarget", null);
            }
        }

        // spaces
        if (!fEntityScanner.skipSpaces()) {
            if (fEntityScanner.skipString("?>")) {
                // we found the end, there is no data
                data.clear();
                return;
            }
            else {
                if(fNamespaces && fEntityScanner.peekChar() == ':") { 
                    fEntityScanner.scanChar();
                    XMLStringBuffer colonName = new XMLStringBuffer(target);
                    colonName.append(":");
                    String str = fEntityScanner.scanName();
                    if (str != null)
                        colonName.append(str);
                    reportFatalError("ColonNotLegalWithNS", new Object[] {colonName.toString()});
                    fEntityScanner.skipSpaces();
                } else {
                    // if there is data there should be some space
                    reportFatalError("SpaceRequiredInPI", null);
                }
            }
        }

        fStringBuffer.clear();
        // data
        if (fEntityScanner.scanData("?>", fStringBuffer)) {
            do {
                int c = fEntityScanner.peekChar();
                if (c != -1) {
                    if (XMLChar.isHighSurrogate(c)) {
                        scanSurrogates(fStringBuffer);
                    }
                    else if (isInvalidLiteral(c)) {
                        reportFatalError("InvalidCharInPI",
                                         new Object[]{Integer.toHexString(c)});
                        fEntityScanner.scanChar();
                    }
                }
            } while (fEntityScanner.scanData("?>", fStringBuffer));
        }
        data.setValues(fStringBuffer);
public java.lang.StringscanPseudoAttribute(boolean scanningTextDecl, org.apache.xerces.xni.XMLString value)
Scans a pseudo attribute.

param
scanningTextDecl True if scanning this pseudo-attribute for a TextDecl; false if scanning XMLDecl. This flag is needed to report the correct type of error.
param
value The string to fill in with the attribute value.
return
The name of the attribute Note: This method uses fStringBuffer2, anything in it at the time of calling is lost.


        // REVISIT: This method is used for generic scanning of 
        // pseudo attributes, but since there are only three such
        // attributes: version, encoding, and standalone there are
        // for performant ways of scanning them. Every decl must
        // have a version, and in TextDecls this version must
        // be followed by an encoding declaration. Also the
        // methods we invoke on the scanners allow non-ASCII
        // characters to be parsed in the decls, but since
        // we don't even know what the actual encoding of the
        // document is until we scan the encoding declaration
        // you cannot reliably read any characters outside
        // of the ASCII range here. -- mrglavas
        String name = fEntityScanner.scanName();
        XMLEntityManager.print(fEntityManager.getCurrentEntity());
        if (name == null) {
            reportFatalError("PseudoAttrNameExpected", null);
        }
        fEntityScanner.skipDeclSpaces();
        if (!fEntityScanner.skipChar('=")) {
            reportFatalError(scanningTextDecl ? "EqRequiredInTextDecl"
                             : "EqRequiredInXMLDecl", new Object[]{name});
        }
        fEntityScanner.skipDeclSpaces();
        int quote = fEntityScanner.peekChar();
        if (quote != '\'" && quote != '"") {
            reportFatalError(scanningTextDecl ? "QuoteRequiredInTextDecl"
                             : "QuoteRequiredInXMLDecl" , new Object[]{name});
        }
        fEntityScanner.scanChar();
        int c = fEntityScanner.scanLiteral(quote, value);
        if (c != quote) {
            fStringBuffer2.clear();
            do {
                fStringBuffer2.append(value);
                if (c != -1) {
                    if (c == '&" || c == '%" || c == '<" || c == ']") {
                        fStringBuffer2.append((char)fEntityScanner.scanChar());
                    }
                    // REVISIT: Even if you could reliably read non-ASCII chars
                    // why bother scanning for surrogates here? Only ASCII chars
                    // match the productions in XMLDecls and TextDecls. -- mrglavas
                    else if (XMLChar.isHighSurrogate(c)) {
                        scanSurrogates(fStringBuffer2);
                    }
                    else if (isInvalidLiteral(c)) {
                        String key = scanningTextDecl
                            ? "InvalidCharInTextDecl" : "InvalidCharInXMLDecl";
                        reportFatalError(key,
                                       new Object[] {Integer.toString(c, 16)});
                        fEntityScanner.scanChar();
                    }
                }
                c = fEntityScanner.scanLiteral(quote, value);
            } while (c != quote);
            fStringBuffer2.append(value);
            value.setValues(fStringBuffer2);
        }
        if (!fEntityScanner.skipChar(quote)) {
            reportFatalError(scanningTextDecl ? "CloseQuoteMissingInTextDecl"
                             : "CloseQuoteMissingInXMLDecl",
                             new Object[]{name});
        }

        // return
        return name;
protected booleanscanPubidLiteral(org.apache.xerces.xni.XMLString literal)
Scans public ID literal. [12] PubidLiteral ::= '"' PubidChar* '"' | "'" (PubidChar - "'")* "'" [13] PubidChar::= #x20 | #xD | #xA | [a-zA-Z0-9] | [-'()+,./:=?;!*#@$_%] The returned string is normalized according to the following rule, from http://www.w3.org/TR/REC-xml#dt-pubid: Before a match is attempted, all strings of white space in the public identifier must be normalized to single space characters (#x20), and leading and trailing white space must be removed.

param
literal The string to fill in with the public ID literal.
return
True on success. Note: This method uses fStringBuffer, anything in it at the time of calling is lost.

        int quote = fEntityScanner.scanChar();
        if (quote != '\'" && quote != '"") {
            reportFatalError("QuoteRequiredInPublicID", null);
            return false;
        }

        fStringBuffer.clear();
        // skip leading whitespace
        boolean skipSpace = true;
        boolean dataok = true;
        while (true) {
            int c = fEntityScanner.scanChar();
            if (c == ' " || c == '\n" || c == '\r") {
                if (!skipSpace) {
                    // take the first whitespace as a space and skip the others
                    fStringBuffer.append(' ");
                    skipSpace = true;
                }
            }
            else if (c == quote) {
                if (skipSpace) {
                    // if we finished on a space let's trim it
                    fStringBuffer.length--;
                }
                literal.setValues(fStringBuffer);
                break;
            }
            else if (XMLChar.isPubid(c)) {
                fStringBuffer.append((char)c);
                skipSpace = false;
            }
            else if (c == -1) {
                reportFatalError("PublicIDUnterminated", null);
                return false;
            }
            else {
                dataok = false;
                reportFatalError("InvalidCharInPublicID",
                                 new Object[]{Integer.toHexString(c)});
            }
        }
        return dataok;
protected booleanscanSurrogates(org.apache.xerces.util.XMLStringBuffer buf)
Scans surrogates and append them to the specified buffer.

Note: This assumes the current char has already been identified as a high surrogate.

param
buf The StringBuffer to append the read surrogates to.
return
True if it succeeded.


        int high = fEntityScanner.scanChar();
        int low = fEntityScanner.peekChar();
        if (!XMLChar.isLowSurrogate(low)) {
            reportFatalError("InvalidCharInContent",
                             new Object[] {Integer.toString(high, 16)});
            return false;
        }
        fEntityScanner.scanChar();

        // convert surrogates to supplemental character
        int c = XMLChar.supplemental((char)high, (char)low);

        // supplemental character must be a valid XML character
        if (isInvalid(c)) {
            reportFatalError("InvalidCharInContent",
                             new Object[]{Integer.toString(c, 16)}); 
            return false;
        }

        // fill in the buffer
        buf.append((char)high);
        buf.append((char)low);

        return true;
protected voidscanXMLDeclOrTextDecl(boolean scanningTextDecl, java.lang.String[] pseudoAttributeValues)
Scans an XML or text declaration. 

[23] XMLDecl ::= ''
[24] VersionInfo ::= S 'version' Eq (' VersionNum ' | " VersionNum ")
[80] EncodingDecl ::= S 'encoding' Eq ('"' EncName '"' | "'" EncName "'" )
[81] EncName ::= [A-Za-z] ([A-Za-z0-9._] | '-')*
[32] SDDecl ::= S 'standalone' Eq (("'" ('yes' | 'no') "'")
| ('"' ('yes' | 'no') '"'))

[77] TextDecl ::= ''

param
scanningTextDecl True if a text declaration is to be scanned instead of an XML declaration.
param
pseudoAttributeValues An array of size 3 to return the version, encoding and standalone pseudo attribute values (in that order). Note: This method uses fString, anything in it at the time of calling is lost.


        // pseudo-attribute values
        String version = null;
        String encoding = null;
        String standalone = null;

        // scan pseudo-attributes
        final int STATE_VERSION = 0;
        final int STATE_ENCODING = 1;
        final int STATE_STANDALONE = 2;
        final int STATE_DONE = 3;
        int state = STATE_VERSION;

        boolean dataFoundForTarget = false;
        boolean sawSpace = fEntityScanner.skipDeclSpaces();
        // since pseudoattributes are *not* attributes,
        // their quotes don't need to be preserved in external parameter entities.
        // the XMLEntityScanner#scanLiteral method will continue to
        // emit -1 in such cases when it finds a quote; this is
        // fine for other methods that parse scanned entities,
        // but not for the scanning of pseudoattributes.  So,
        // temporarily, we must mark the current entity as not being "literal"
        XMLEntityManager.ScannedEntity currEnt = fEntityManager.getCurrentEntity();
        boolean currLiteral = currEnt.literal;
        currEnt.literal = false;
        while (fEntityScanner.peekChar() != '?") {
            dataFoundForTarget = true;
            String name = scanPseudoAttribute(scanningTextDecl, fString);
            switch (state) {
                case STATE_VERSION: {
                    if (name == fVersionSymbol) {
                        if (!sawSpace) {
                            reportFatalError(scanningTextDecl
                                       ? "SpaceRequiredBeforeVersionInTextDecl"
                                       : "SpaceRequiredBeforeVersionInXMLDecl",
                                             null);
                        }
                        version = fString.toString();
                        state = STATE_ENCODING;
                        if (!versionSupported(version)) {
                            reportFatalError(getVersionNotSupportedKey(), 
                                             new Object[]{version});
                        }
                    }
                    else if (name == fEncodingSymbol) {
                        if (!scanningTextDecl) {
                            reportFatalError("VersionInfoRequired", null);
                        }
                        if (!sawSpace) {
                            reportFatalError(scanningTextDecl
                                      ? "SpaceRequiredBeforeEncodingInTextDecl"
                                      : "SpaceRequiredBeforeEncodingInXMLDecl",
                                             null);
                        }
                        encoding = fString.toString();
                        state = scanningTextDecl ? STATE_DONE : STATE_STANDALONE;
                    }
                    else {
                        if (scanningTextDecl) {
                            reportFatalError("EncodingDeclRequired", null);
                        }
                        else {
                            reportFatalError("VersionInfoRequired", null);
                        }
                    }
                    break;
                }
                case STATE_ENCODING: {
                    if (name == fEncodingSymbol) {
                        if (!sawSpace) {
                            reportFatalError(scanningTextDecl
                                      ? "SpaceRequiredBeforeEncodingInTextDecl"
                                      : "SpaceRequiredBeforeEncodingInXMLDecl",
                                             null);
                        }
                        encoding = fString.toString();
                        state = scanningTextDecl ? STATE_DONE : STATE_STANDALONE;
                        // TODO: check encoding name; set encoding on
                        //       entity scanner
                    }
                    else if (!scanningTextDecl && name == fStandaloneSymbol) {
                        if (!sawSpace) {
                            reportFatalError("SpaceRequiredBeforeStandalone",
                                             null);
                        }
                        standalone = fString.toString();
                        state = STATE_DONE;
                        if (!standalone.equals("yes") && !standalone.equals("no")) {
                            reportFatalError("SDDeclInvalid", new Object[] {standalone});
                        }
                    }
                    else {
                        reportFatalError("EncodingDeclRequired", null);
                    }
                    break;
                }
                case STATE_STANDALONE: {
                    if (name == fStandaloneSymbol) {
                        if (!sawSpace) {
                            reportFatalError("SpaceRequiredBeforeStandalone",
                                             null);
                        }
                        standalone = fString.toString();
                        state = STATE_DONE;
                        if (!standalone.equals("yes") && !standalone.equals("no")) {
                            reportFatalError("SDDeclInvalid", new Object[] {standalone});
                        }
                    }
                    else {
                        reportFatalError("EncodingDeclRequired", null);
                    }
                    break;
                }
                default: {
                    reportFatalError("NoMorePseudoAttributes", null);
                }
            }
            sawSpace = fEntityScanner.skipDeclSpaces();
        }
        // restore original literal value
        if(currLiteral) 
            currEnt.literal = true;
        // REVISIT: should we remove this error reporting?
        if (scanningTextDecl && state != STATE_DONE) {
            reportFatalError("MorePseudoAttributes", null);
        }
        
        // If there is no data in the xml or text decl then we fail to report error 
        // for version or encoding info above.
        if (scanningTextDecl) {
            if (!dataFoundForTarget && encoding == null) {
                reportFatalError("EncodingDeclRequired", null);
            }
        }
        else {
            if (!dataFoundForTarget && version == null) {
                reportFatalError("VersionInfoRequired", null);
            }
        }

        // end
        if (!fEntityScanner.skipChar('?")) {
            reportFatalError("XMLDeclUnterminated", null);
        }
        if (!fEntityScanner.skipChar('>")) {
            reportFatalError("XMLDeclUnterminated", null);

        }
        
        // fill in return array
        pseudoAttributeValues[0] = version;
        pseudoAttributeValues[1] = encoding;
        pseudoAttributeValues[2] = standalone;
public voidsetFeature(java.lang.String featureId, boolean value)

            
        if (VALIDATION.equals(featureId)) {
            fValidation = value;
        } else if (NOTIFY_CHAR_REFS.equals(featureId)) {
            fNotifyCharRefs = value;
        }
public voidsetProperty(java.lang.String propertyId, java.lang.Object value)
Sets the value of a property during parsing.

param
propertyId
param
value

        
        // Xerces properties
        if (propertyId.startsWith(Constants.XERCES_PROPERTY_PREFIX)) {
        	final int suffixLength = propertyId.length() - Constants.XERCES_PROPERTY_PREFIX.length();
        	
            if (suffixLength == Constants.SYMBOL_TABLE_PROPERTY.length() && 
                propertyId.endsWith(Constants.SYMBOL_TABLE_PROPERTY)) {
                fSymbolTable = (SymbolTable)value;
            }
            else if (suffixLength == Constants.ERROR_REPORTER_PROPERTY.length() && 
                propertyId.endsWith(Constants.ERROR_REPORTER_PROPERTY)) {
                fErrorReporter = (XMLErrorReporter)value;
            }
            else if (suffixLength == Constants.ENTITY_MANAGER_PROPERTY.length() && 
                propertyId.endsWith(Constants.ENTITY_MANAGER_PROPERTY)) {
                fEntityManager = (XMLEntityManager)value;
            }
        }
public voidstartEntity(java.lang.String name, org.apache.xerces.xni.XMLResourceIdentifier identifier, java.lang.String encoding, org.apache.xerces.xni.Augmentations augs)
This method notifies of the start of an entity. The document entity has the pseudo-name of "[xml]" the DTD has the pseudo-name of "[dtd]" parameter entity names start with '%'; and general entities are just specified by their name.

param
name The name of the entity.
param
identifier The resource identifier.
param
encoding The auto-detected IANA encoding name of the entity stream. This value will be null in those situations where the entity encoding is not auto-detected (e.g. internal entities or a document entity that is parsed from a java.io.Reader).
param
augs Additional information that may include infoset augmentations
throws
XNIException Thrown by handler to signal an error.


        // keep track of the entity depth
        fEntityDepth++;
        // must reset entity scanner
        fEntityScanner = fEntityManager.getEntityScanner();
protected booleanversionSupported(java.lang.String version)

        return version.equals("1.0");