org.apache.xerces.impl.dtd
Class XMLDTDValidator

java.lang.Object
  org.apache.xerces.impl.dtd.XMLDTDValidator

All Implemented Interfaces:

XMLDTDValidatorFilter, RevalidationHandler, XMLComponent, XMLDocumentFilter, XMLDocumentSource, XMLDocumentHandler

Direct Known Subclasses:

XML11DTDValidator, XMLNSDTDValidator

public class XMLDTDValidator
extends java.lang.Object
implements XMLComponent, XMLDocumentFilter, XMLDTDValidatorFilter, RevalidationHandler

The DTD validator. The validator implements a document filter: receiving document events from the scanner; validating the content and structure; augmenting the InfoSet, if applicable; and notifying the parser of the information resulting from the validation process.

Formerly, this component also handled DTD events and grammar construction. To facilitate the development of a meaningful DTD grammar caching/preparsing framework, this functionality has been moved into the XMLDTDLoader class. Therefore, this class no longer implements the DTDFilter or DTDContentModelFilter interfaces.

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

• http://xml.org/sax/features/namespaces
• http://xml.org/sax/features/validation
• http://apache.org/xml/features/validation/dynamic
• http://apache.org/xml/properties/internal/symbol-table
• http://apache.org/xml/properties/internal/error-reporter
• http://apache.org/xml/properties/internal/grammar-pool
• http://apache.org/xml/properties/internal/datatype-validator-factory

Version:

$Id: XMLDTDValidator.java 572055 2007-09-02 17:55:43Z mrglavas $

Author:

Eric Ye, IBM, Andy Clark, IBM, Jeffrey Rodriguez IBM, Neil Graham, IBM

Constructor Summary

XMLDTDValidator()
Default constructor.

Method Summary

boolean	characterData(java.lang.String data, Augmentations augs) Character content.
void	characters(XMLString text, Augmentations augs) Character content.
void	comment(XMLString text, Augmentations augs) A comment.
void	doctypeDecl(java.lang.String rootElement, java.lang.String publicId, java.lang.String systemId, Augmentations augs) Notifies of the presence of the DOCTYPE line in the document.
void	emptyElement(QName element, XMLAttributes attributes, Augmentations augs) An empty element.
void	endCDATA(Augmentations augs) The end of a CDATA section.
void	endDocument(Augmentations augs) The end of the document.
void	endElement(QName element, Augmentations augs) The end of an element.
void	endGeneralEntity(java.lang.String name, Augmentations augs) This method notifies the end of a general entity.
XMLDocumentHandler	getDocumentHandler() Returns the document handler
XMLDocumentSource	getDocumentSource() Returns the document source
java.lang.Boolean	getFeatureDefault(java.lang.String featureId) Returns the default state for a feature, or null if this component does not want to report a default value for this feature.
java.lang.Object	getPropertyDefault(java.lang.String propertyId) Returns the default state for a property, or null if this component does not want to report a default value for this property.
java.lang.String[]	getRecognizedFeatures() Returns a list of feature identifiers that are recognized by this component.
java.lang.String[]	getRecognizedProperties() Returns a list of property identifiers that are recognized by this component.
boolean	hasGrammar() Returns true if the validator has a DTD grammar
void	ignorableWhitespace(XMLString text, Augmentations augs) Ignorable whitespace.
void	processingInstruction(java.lang.String target, XMLString data, Augmentations augs) A processing instruction.
void	reset(XMLComponentManager componentManager) Resets the component.
void	setDocumentHandler(XMLDocumentHandler documentHandler) Sets the document handler to receive information about the document.
void	setDocumentSource(XMLDocumentSource source) Sets the document source
void	setFeature(java.lang.String featureId, boolean state) Sets the state of a feature.
void	setProperty(java.lang.String propertyId, java.lang.Object value) Sets the value of a property.
void	startCDATA(Augmentations augs) The start of a CDATA section.
void	startDocument(XMLLocator locator, java.lang.String encoding, NamespaceContext namespaceContext, Augmentations augs) The start of the document.
void	startElement(QName element, XMLAttributes attributes, Augmentations augs) The start of an element.
void	startGeneralEntity(java.lang.String name, XMLResourceIdentifier identifier, java.lang.String encoding, Augmentations augs) This method notifies the start of a general entity.
void	textDecl(java.lang.String version, java.lang.String encoding, Augmentations augs) Notifies of the presence of a TextDecl line in an entity.
boolean	validate() Return true if validator must validate the document
void	xmlDecl(java.lang.String version, java.lang.String encoding, java.lang.String standalone, Augmentations augs) Notifies of the presence of an XMLDecl line in the document.

Methods inherited from class java.lang.Object

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

Constructor Detail

XMLDTDValidator

public XMLDTDValidator()

Default constructor.

Method Detail

reset

public void reset(XMLComponentManager componentManager)
           throws XMLConfigurationException

Description copied from interface: XMLComponent

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

Specified by:

reset in interface XMLComponent

Parameters:

componentManager - The component manager.

Throws:

XMLConfigurationException

getRecognizedFeatures

public java.lang.String[] getRecognizedFeatures()

Returns a list of feature identifiers that are recognized by this component. This method may return null if no features are recognized by this component.

Specified by:

getRecognizedFeatures in interface XMLComponent

setFeature

public void setFeature(java.lang.String featureId,
                       boolean state)
                throws XMLConfigurationException

Sets the state of a feature. This method is called by the component manager any time after reset when a feature changes state.

Note: Components should silently ignore features that do not affect the operation of the component.

Specified by:

setFeature in interface XMLComponent

Parameters:

featureId - The feature identifier.

state - The state of the feature.

Throws:

SAXNotRecognizedException - The component should not throw this exception.

SAXNotSupportedException - The component should not throw this exception.

XMLConfigurationException - Thrown for configuration error. In general, components should only throw this exception if it is really a critical error.

getRecognizedProperties

public java.lang.String[] getRecognizedProperties()

Returns a list of property identifiers that are recognized by this component. This method may return null if no properties are recognized by this component.

Specified by:

getRecognizedProperties in interface XMLComponent

setProperty

public void setProperty(java.lang.String propertyId,
                        java.lang.Object value)
                 throws XMLConfigurationException

Sets the value of a property. This method is called by the component manager any time after reset when a property changes value.

Note: Components should silently ignore properties that do not affect the operation of the component.

Specified by:

setProperty in interface XMLComponent

Parameters:

propertyId - The property identifier.

value - The value of the property.

Throws:

SAXNotRecognizedException - The component should not throw this exception.

SAXNotSupportedException - The component should not throw this exception.

XMLConfigurationException - Thrown for configuration error. In general, components should only throw this exception if it is really a critical error.

getFeatureDefault

public java.lang.Boolean getFeatureDefault(java.lang.String featureId)

Returns the default state for a feature, or null if this component does not want to report a default value for this feature.

Specified by:

getFeatureDefault in interface XMLComponent

Parameters:

featureId - The feature identifier.

Since:

Xerces 2.2.0

getPropertyDefault

public java.lang.Object getPropertyDefault(java.lang.String propertyId)

Returns the default state for a property, or null if this component does not want to report a default value for this property.

Specified by:

getPropertyDefault in interface XMLComponent

Parameters:

propertyId - The property identifier.

Since:

Xerces 2.2.0

setDocumentHandler

public void setDocumentHandler(XMLDocumentHandler documentHandler)

Sets the document handler to receive information about the document.

Specified by:

setDocumentHandler in interface XMLDocumentSource

getDocumentHandler

public XMLDocumentHandler getDocumentHandler()

Returns the document handler

Specified by:

getDocumentHandler in interface XMLDocumentSource

setDocumentSource

public void setDocumentSource(XMLDocumentSource source)

Sets the document source

Specified by:

setDocumentSource in interface XMLDocumentHandler

getDocumentSource

public XMLDocumentSource getDocumentSource()

Returns the document source

Specified by:

getDocumentSource in interface XMLDocumentHandler

startDocument

public void startDocument(XMLLocator locator,
                          java.lang.String encoding,
                          NamespaceContext namespaceContext,
                          Augmentations augs)
                   throws XNIException

The start of the document.

Specified by:

startDocument in interface XMLDocumentHandler

Parameters:

locator - The system identifier of the entity if the entity is external, null otherwise.

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).

namespaceContext - The namespace context in effect at the start of this document. This object represents the current context. Implementors of this class are responsible for copying the namespace bindings from the the current context (and its parent contexts) if that information is important.

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

xmlDecl

public void xmlDecl(java.lang.String version,
                    java.lang.String encoding,
                    java.lang.String standalone,
                    Augmentations augs)
             throws XNIException

Notifies of the presence of an XMLDecl line in the document. If present, this method will be called immediately following the startDocument call.

Specified by:

xmlDecl in interface XMLDocumentHandler

Parameters:

version - The XML version.

encoding - The IANA encoding name of the document, or null if not specified.

standalone - The standalone value, or null if not specified.

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

doctypeDecl

public void doctypeDecl(java.lang.String rootElement,
                        java.lang.String publicId,
                        java.lang.String systemId,
                        Augmentations augs)
                 throws XNIException

Notifies of the presence of the DOCTYPE line in the document.

Specified by:

doctypeDecl in interface XMLDocumentHandler

Parameters:

rootElement - The name of the root element.

publicId - The public identifier if an external DTD or null if the external DTD is specified using SYSTEM.

systemId - The system identifier if an external DTD, null otherwise.

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

startElement

public void startElement(QName element,
                         XMLAttributes attributes,
                         Augmentations augs)
                  throws XNIException

The start of an element.

Specified by:

startElement in interface XMLDocumentHandler

Parameters:

element - The name of the element.

attributes - The element attributes.

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

emptyElement

public void emptyElement(QName element,
                         XMLAttributes attributes,
                         Augmentations augs)
                  throws XNIException

An empty element.

Specified by:

emptyElement in interface XMLDocumentHandler

Parameters:

element - The name of the element.

attributes - The element attributes.

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

characters

public void characters(XMLString text,
                       Augmentations augs)
                throws XNIException

Character content.

Specified by:

characters in interface XMLDocumentHandler

Parameters:

text - The content.

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

ignorableWhitespace

public void ignorableWhitespace(XMLString text,
                                Augmentations augs)
                         throws XNIException

Ignorable whitespace. For this method to be called, the document source must have some way of determining that the text containing only whitespace characters should be considered ignorable. For example, the validator can determine if a length of whitespace characters in the document are ignorable based on the element content model.

Specified by:

ignorableWhitespace in interface XMLDocumentHandler

Parameters:

text - The ignorable whitespace.

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

endElement

public void endElement(QName element,
                       Augmentations augs)
                throws XNIException

The end of an element.

Specified by:

endElement in interface XMLDocumentHandler

Parameters:

element - The name of the element.

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

startCDATA

public void startCDATA(Augmentations augs)
                throws XNIException

The start of a CDATA section.

Specified by:

startCDATA in interface XMLDocumentHandler

Parameters:

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

endCDATA

public void endCDATA(Augmentations augs)
              throws XNIException

The end of a CDATA section.

Specified by:

endCDATA in interface XMLDocumentHandler

Parameters:

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

endDocument

public void endDocument(Augmentations augs)
                 throws XNIException

The end of the document.

Specified by:

endDocument in interface XMLDocumentHandler

Parameters:

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

comment

public void comment(XMLString text,
                    Augmentations augs)
             throws XNIException

A comment.

Specified by:

comment in interface XMLDocumentHandler

Parameters:

text - The text in the comment.

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by application to signal an error.

processingInstruction

public void processingInstruction(java.lang.String target,
                                  XMLString data,
                                  Augmentations augs)
                           throws XNIException

A processing instruction. Processing instructions consist of a target name and, optionally, text data. The data is only meaningful to the application.

Typically, a processing instruction's data will contain a series of pseudo-attributes. These pseudo-attributes follow the form of element attributes but are not parsed or presented to the application as anything other than text. The application is responsible for parsing the data.

Specified by:

processingInstruction in interface XMLDocumentHandler

Parameters:

target - The target.

data - The data or null if none specified.

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

startGeneralEntity

public void startGeneralEntity(java.lang.String name,
                               XMLResourceIdentifier identifier,
                               java.lang.String encoding,
                               Augmentations augs)
                        throws XNIException

This method notifies the start of a general entity.

Note: This method is not called for entity references appearing as part of attribute values.

Specified by:

startGeneralEntity in interface XMLDocumentHandler

Parameters:

name - The name of the general entity.

identifier - The resource identifier.

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).

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

endGeneralEntity

public void endGeneralEntity(java.lang.String name,
                             Augmentations augs)
                      throws XNIException

This method notifies the end of a general entity.

Note: This method is not called for entity references appearing as part of attribute values.

Specified by:

endGeneralEntity in interface XMLDocumentHandler

Parameters:

name - The name of the entity.

augs - Additional information that may include infoset augmentations

Throws:

XNIException - Thrown by handler to signal an error.

textDecl

public void textDecl(java.lang.String version,
                     java.lang.String encoding,
                     Augmentations augs)
              throws XNIException

Notifies of the presence of a TextDecl line in an entity. If present, this method will be called immediately following the startParameterEntity call.

Note: This method is only called for external parameter entities referenced in the DTD.

Specified by:

textDecl in interface XMLDocumentHandler

Parameters:

version - The XML version, or null if not specified.

encoding - The IANA encoding name of the entity.

augs - Additional information that may include infoset augmentations.

Throws:

XNIException - Thrown by handler to signal an error.

hasGrammar

public final boolean hasGrammar()

Description copied from interface: XMLDTDValidatorFilter

Returns true if the validator has a DTD grammar

Specified by:

hasGrammar in interface XMLDTDValidatorFilter

Returns:

true if the validator has a DTD grammar

validate

public final boolean validate()

Description copied from interface: XMLDTDValidatorFilter

Return true if validator must validate the document

Specified by:

validate in interface XMLDTDValidatorFilter

Returns:

true if validator must validate the document

characterData

public boolean characterData(java.lang.String data,
                             Augmentations augs)

Description copied from interface: RevalidationHandler

Character content.

Specified by:

characterData in interface RevalidationHandler

Parameters:

data - The character data.

augs - Augmentations

Returns:

True if data is whitespace only