org.apache.xerces.impl
Class XMLNSDocumentScannerImpl

java.lang.Object
  |
  +--org.apache.xerces.impl.XMLScanner
        |
        +--org.apache.xerces.impl.XMLDocumentFragmentScannerImpl
              |
              +--org.apache.xerces.impl.XMLDocumentScannerImpl
                    |
                    +--org.apache.xerces.impl.XMLNSDocumentScannerImpl

All Implemented Interfaces:

org.apache.xerces.xni.parser.XMLComponent, org.apache.xerces.xni.parser.XMLDocumentScanner, org.apache.xerces.xni.parser.XMLDocumentSource, XMLEntityHandler

public class XMLNSDocumentScannerImpl

extends XMLDocumentScannerImpl

The scanner acts as the source for the document information which is communicated to the document handler. This class scans an XML document, checks if document has a DTD, and if DTD is not found the scanner will remove the DTD Validator from the pipeline and perform namespace binding. Note: This scanner should only be used when the namespace processing is on!

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

• http://xml.org/sax/features/namespaces {true} -- if the value of this feature is set to false this scanner must not be used.
• http://xml.org/sax/features/validation
• http://apache.org/xml/features/nonvalidating/load-external-dtd
• http://apache.org/xml/features/scanner/notify-char-refs
• http://apache.org/xml/features/scanner/notify-builtin-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
• http://apache.org/xml/properties/internal/dtd-scanner

INTERNAL:

Usage of this class is not supported. It may be altered or removed at any time.

Version:

$Id: XMLNSDocumentScannerImpl.java,v 1.25 2004/10/04 21:45:48 mrglavas Exp $

Author:

Elena Litani, IBM

Inner Class Summary

protected class

XMLNSDocumentScannerImpl.NSContentDispatcher Dispatcher to handle content scanning.

Inner classes inherited from class org.apache.xerces.impl.XMLDocumentScannerImpl

XMLDocumentScannerImpl.ContentDispatcher, XMLDocumentScannerImpl.DTDDispatcher, XMLDocumentScannerImpl.PrologDispatcher, XMLDocumentScannerImpl.TrailingMiscDispatcher, XMLDocumentScannerImpl.XMLDeclDispatcher

Inner classes inherited from class org.apache.xerces.impl.XMLDocumentFragmentScannerImpl

XMLDocumentFragmentScannerImpl.Dispatcher, XMLDocumentFragmentScannerImpl.ElementStack, XMLDocumentFragmentScannerImpl.FragmentContentDispatcher

Field Summary

protected boolean	fBindNamespaces If is true, the dtd validator is no longer in the pipeline and the scanner should bind namespaces
protected boolean	fPerformValidation If validating parser, make sure we report an error in the scanner if DTD grammar is missing.

Fields inherited from class org.apache.xerces.impl.XMLDocumentScannerImpl

DISALLOW_DOCTYPE_DECL_FEATURE, DTD_SCANNER, fDisallowDoctype, fDoctypeName, fDoctypePublicId, fDoctypeSystemId, fDTDDispatcher, fDTDScanner, fLoadExternalDTD, fNamespaceContext, fPrologDispatcher, fScanningDTD, fSeenDoctypeDecl, fTrailingMiscDispatcher, fValidationManager, fXMLDeclDispatcher, LOAD_EXTERNAL_DTD, NAMESPACE_CONTEXT, SCANNER_STATE_DTD_EXTERNAL, SCANNER_STATE_DTD_EXTERNAL_DECLS, SCANNER_STATE_DTD_INTERNAL_DECLS, SCANNER_STATE_PROLOG, SCANNER_STATE_TRAILING_MISC, SCANNER_STATE_XML_DECL, VALIDATION_MANAGER

Fields inherited from class org.apache.xerces.impl.XMLDocumentFragmentScannerImpl

DEBUG_CONTENT_SCANNING, ENTITY_RESOLVER, fAttributeQName, fAttributes, fContentDispatcher, fCurrentElement, fDispatcher, fDocumentHandler, fElementQName, fElementStack, fEntityStack, fExternalSubsetResolver, fHasExternalDTD, fInScanContent, fMarkupDepth, fNotifyBuiltInRefs, fScannerState, fStandalone, fTempString, fTempString2, NAMESPACES, NOTIFY_BUILTIN_REFS, SCANNER_STATE_CDATA, SCANNER_STATE_COMMENT, SCANNER_STATE_CONTENT, SCANNER_STATE_DOCTYPE, SCANNER_STATE_END_OF_INPUT, SCANNER_STATE_PI, SCANNER_STATE_REFERENCE, SCANNER_STATE_ROOT_ELEMENT, SCANNER_STATE_START_OF_MARKUP, SCANNER_STATE_TERMINATED, SCANNER_STATE_TEXT_DECL

Fields inherited from class org.apache.xerces.impl.XMLScanner

DEBUG_ATTR_NORMALIZATION, ENTITY_MANAGER, ERROR_REPORTER, fAmpSymbol, fAposSymbol, fCharRefLiteral, fEncodingSymbol, fEntityDepth, fEntityManager, fEntityScanner, fErrorReporter, fGtSymbol, fLtSymbol, fNamespaces, fNotifyCharRefs, fParserSettings, fQuotSymbol, fReportEntity, fResourceIdentifier, fScanningAttribute, fStandaloneSymbol, fSymbolTable, fValidation, fVersionSymbol, NOTIFY_CHAR_REFS, PARSER_SETTINGS, SYMBOL_TABLE, VALIDATION

Constructor Summary

XMLNSDocumentScannerImpl()

Method Summary

protected XMLDocumentFragmentScannerImpl.Dispatcher	createContentDispatcher() Creates a content dispatcher.
void	reset(org.apache.xerces.xni.parser.XMLComponentManager componentManager) Resets the component.
protected void	scanAttribute(XMLAttributesImpl attributes) Scans an attribute.
protected int	scanEndElement() Scans an end element.
protected boolean	scanStartElement() Scans a start element.
protected boolean	scanStartElementAfterName() Scans the remainder of a start or empty tag after the element name.
protected void	scanStartElementName() Scans the name of an element in a start or empty tag.
void	setDTDValidator(XMLDTDValidatorFilter dtd) The scanner is responsible for removing DTD validator from the pipeline if it is not needed.

Methods inherited from class org.apache.xerces.impl.XMLDocumentScannerImpl

endEntity, getFeatureDefault, getPropertyDefault, getRecognizedFeatures, getRecognizedProperties, getScannerStateName, scanDoctypeDecl, setFeature, setInputSource, setProperty, startEntity

Methods inherited from class org.apache.xerces.impl.XMLDocumentFragmentScannerImpl

getDispatcherName, getDocumentHandler, handleEndElement, scanAttribute, scanCDATASection, scanCharReference, scanComment, scanContent, scanDocument, scanEntityReference, scanPIData, scanXMLDeclOrTextDecl, setDispatcher, setDocumentHandler, setScannerState

Methods inherited from class org.apache.xerces.impl.XMLScanner

getFeature, getVersionNotSupportedKey, isInvalid, isInvalidLiteral, isUnchangedByNormalization, isValidNameChar, isValidNameStartChar, isValidNameStartHighSurrogate, isValidNCName, normalizeWhitespace, normalizeWhitespace, reportFatalError, reset, scanAttributeValue, scanCharReferenceValue, scanComment, scanExternalID, scanPI, scanPseudoAttribute, scanPubidLiteral, scanSurrogates, scanXMLDeclOrTextDecl, versionSupported

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

fBindNamespaces

protected boolean fBindNamespaces

If is true, the dtd validator is no longer in the pipeline and the scanner should bind namespaces

fPerformValidation

protected boolean fPerformValidation

If validating parser, make sure we report an error in the scanner if DTD grammar is missing.

Constructor Detail

XMLNSDocumentScannerImpl

public XMLNSDocumentScannerImpl()

Method Detail

setDTDValidator

public void setDTDValidator(XMLDTDValidatorFilter dtd)

The scanner is responsible for removing DTD validator from the pipeline if it is not needed.

Parameters:

previous - The filter component before DTDValidator

dtdValidator - The DTDValidator

next - The documentHandler after the DTDValidator

scanStartElement

protected boolean scanStartElement()
                            throws java.io.IOException,
                                   org.apache.xerces.xni.XNIException

Scans a start element. This method will handle the binding of namespace information and notifying the handler of the start of the element.

 [44] EmptyElemTag ::= '<' Name (S Attribute)* S? '/>'
 [40] STag ::= '<' Name (S Attribute)* S? '>'
 

Note: This method assumes that the leading '<' character has been consumed.

Note: This method uses the fElementQName and fAttributes variables. The contents of these variables will be destroyed. The caller should copy important information out of these variables before calling this method.

Overrides:

scanStartElement in class XMLDocumentFragmentScannerImpl

Returns:

True if element is empty. (i.e. It matches production [44].

scanStartElementName

protected void scanStartElementName()
                             throws java.io.IOException,
                                    org.apache.xerces.xni.XNIException

Scans the name of an element in a start or empty tag.

Overrides:

scanStartElementName in class XMLDocumentFragmentScannerImpl

See Also:

scanStartElement()

scanStartElementAfterName

protected boolean scanStartElementAfterName()
                                     throws java.io.IOException,
                                            org.apache.xerces.xni.XNIException

Scans the remainder of a start or empty tag after the element name.

Overrides:

scanStartElementAfterName in class XMLDocumentFragmentScannerImpl

Returns:

True if element is empty.

See Also:

scanStartElement()

scanAttribute

protected void scanAttribute(XMLAttributesImpl attributes)
                      throws java.io.IOException,
                             org.apache.xerces.xni.XNIException

Scans an attribute.

 [41] Attribute ::= Name Eq AttValue
 

Note: This method assumes that the next character on the stream is the first character of the attribute name.

Note: This method uses the fAttributeQName and fQName variables. The contents of these variables will be destroyed.

Parameters:

attributes - The attributes list for the scanned attribute.

scanEndElement

protected int scanEndElement()
                      throws java.io.IOException,
                             org.apache.xerces.xni.XNIException

Scans an end element.

 [42] ETag ::= '</' Name S? '>'
 

Note: 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.

Overrides:

scanEndElement in class XMLDocumentFragmentScannerImpl

Returns:

The element depth.

reset

public void reset(org.apache.xerces.xni.parser.XMLComponentManager componentManager)
           throws org.apache.xerces.xni.parser.XMLConfigurationException

Description copied from class: XMLDocumentScannerImpl

Resets the component. The component can query the component manager about any features and properties that affect the operation of the component.

Overrides:

reset in class XMLDocumentScannerImpl

Following copied from class: org.apache.xerces.impl.XMLDocumentScannerImpl

Parameters:

componentManager - The component manager.

Throws:

SAXException - Thrown by component on initialization error. For example, if a feature or property is required for the operation of the component, the component manager may throw a SAXNotRecognizedException or a SAXNotSupportedException.

createContentDispatcher

protected XMLDocumentFragmentScannerImpl.Dispatcher createContentDispatcher()

Creates a content dispatcher.

Overrides:

createContentDispatcher in class XMLDocumentScannerImpl