com.saxonica.validate
Class ValidatorHandlerImpl

java.lang.Object
  javax.xml.validation.ValidatorHandler
      com.saxonica.validate.ValidatorHandlerImpl

All Implemented Interfaces:

org.xml.sax.ContentHandler, org.xml.sax.DTDHandler, org.xml.sax.ext.LexicalHandler

public class ValidatorHandlerImpl

extends javax.xml.validation.ValidatorHandler

implements org.xml.sax.ContentHandler, org.xml.sax.ext.LexicalHandler, org.xml.sax.DTDHandler

The is the Saxon implementation of the JAXP 1.3 ValidatorHandler interface. It is a SAX ContentHandler that accepts events from an XML parser (or elsewhere), validates them, reports any errors, and passes the events on to another ContentHandler. The events that are passed on will be augmented with extra elements and attributes that expand default values defined in the schema. In addition, the receiving ContentHandler has access to a TypeInfoProvider that gives information about the type of the current element or attribute event.

A ValidatorHandler is the front end to a rather complex pipeline. The ValidatorHandler is the first stage in the pipeline: it recieves events from a SAX parser or other source of SAX events. The next stage is a ReceivingContentHandler, which translates SAX events into Receiver events. This is followed by a number of Receivers to do the validation (actually a stack of Receivers, since a new ComplexContentValidator is added each time a new element starts). The last Receiver is the finalProxy: this translates Receiver events back into SAX2 events, for delivery to the user's ContentHandler.

The user's ContentHandler has access to a TypeInfoProvider that gives information about the types of elements and attributes. This information is passed down the Receiver pipeline in the form of typeCodes associated with element and attribute events. The TypeInfoProvider is part of the finalProxy, which saves the type information locally and returns it to the user's ContentHandler on request. The TypeInfo objects supplied by the TypeInfoProvider are in fact the schema components representing the type, as a SchemaType object.

Constructor Summary

ValidatorHandlerImpl()

Method Summary

void	characters(char[] ch, int start, int length) Receive notification of character data.
void	comment(char[] ch, int start, int length) Report an XML comment anywhere in the document.
void	endCDATA() Report the end of a CDATA section.
void	endDocument() Receive notification of the end of a document.
void	endDTD() Report the end of DTD declarations.
void	endElement(java.lang.String uri, java.lang.String localName, java.lang.String qName) Receive notification of the end of an element.
void	endEntity(java.lang.String name) Report the end of an entity.
void	endPrefixMapping(java.lang.String prefix) End the scope of a prefix-URI mapping.
Configuration	getConfiguration() Get the Configuration object
org.xml.sax.ContentHandler	getContentHandler() Gets the ContentHandler which receives the augmented validation result.
org.xml.sax.ErrorHandler	getErrorHandler() Gets the current ErrorHandler
java.lang.Object	getProperty(java.lang.String name) Look up the value of a property.
org.w3c.dom.ls.LSResourceResolver	getResourceResolver() Gets the current LSResourceResolver
javax.xml.validation.TypeInfoProvider	getTypeInfoProvider() Obtains the TypeInfoProvider implementation of this ValidatorHandler.
void	ignorableWhitespace(char[] ch, int start, int length) Receive notification of ignorable whitespace in element content.
void	notationDecl(java.lang.String name, java.lang.String publicId, java.lang.String systemId) Receive notification of a notation declaration event.
void	processingInstruction(java.lang.String target, java.lang.String data) Receive notification of a processing instruction.
void	setContentHandler(org.xml.sax.ContentHandler receiver) Sets the ContentHandler which receives the augmented validation result.
void	setDocumentLocator(org.xml.sax.Locator locator) Receive an object for locating the origin of SAX document events.
void	setErrorHandler(org.xml.sax.ErrorHandler errorHandler) Sets the ErrorHandler to receive errors encountered during the validation.
void	setFinalProxy(TypedContentHandler proxy)
void	setPipelineConfiguration(PipelineConfiguration pipe)
void	setProperty(java.lang.String name, java.lang.Object object) Set the value of a property.
void	setReceivingContentHandler(ReceivingContentHandler rch)
void	setResourceResolver(org.w3c.dom.ls.LSResourceResolver resourceResolver) Sets the LSResourceResolver to customize resource resolution while in a validation episode.
void	skippedEntity(java.lang.String name) Receive notification of a skipped entity.
void	startCDATA() Report the start of a CDATA section.
void	startDocument() Receive notification of the beginning of a document.
void	startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId) Report the start of DTD declarations, if any.
void	startElement(java.lang.String uri, java.lang.String localName, java.lang.String qName, org.xml.sax.Attributes atts) Receive notification of the beginning of an element.
void	startEntity(java.lang.String name) Report the beginning of some internal and external XML entities.
void	startPrefixMapping(java.lang.String prefix, java.lang.String uri) Begin the scope of a prefix-URI Namespace mapping.
void	unparsedEntityDecl(java.lang.String name, java.lang.String publicId, java.lang.String systemId, java.lang.String notationName) Receive notification of an unparsed entity declaration event.

Methods inherited from class javax.xml.validation.ValidatorHandler

getFeature, setFeature

Methods inherited from class java.lang.Object

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

Constructor Detail

ValidatorHandlerImpl

public ValidatorHandlerImpl()

Method Detail

setPipelineConfiguration

public void setPipelineConfiguration(PipelineConfiguration pipe)

setReceivingContentHandler

public void setReceivingContentHandler(ReceivingContentHandler rch)

setFinalProxy

public void setFinalProxy(TypedContentHandler proxy)

setContentHandler

public void setContentHandler(org.xml.sax.ContentHandler receiver)

Sets the ContentHandler which receives the augmented validation result. A ValidatorHandler may buffer events to certain extent, but to allow ValidatorHandler to be used by a parser, the following requirement has to be met.

1. When ContentHandler.startElement(String, String, String, Attributes), ContentHandler.endElement(String, String, String), ContentHandler.startDocument(), or ContentHandler.endDocument() are invoked on a ValidatorHandler, the same method on the user-specified ContentHandler must be invoked for the same event before the callback returns.

   The Saxon implementation does not meet this requirement. StartElement events are buffered until the first thing following the attributes is encountered.

   Parameters:

   receiver - A ContentHandler or a null value.

getContentHandler

public org.xml.sax.ContentHandler getContentHandler()

Gets the ContentHandler which receives the augmented validation result.

Returns:

This method returns the object that was last set through the getContentHandler() method, or null if that method has never been called since this ValidatorHandler has created.

See Also:

setContentHandler(org.xml.sax.ContentHandler)

setErrorHandler

public void setErrorHandler(org.xml.sax.ErrorHandler errorHandler)

Sets the ErrorHandler to receive errors encountered during the validation.

Parameters:

errorHandler - A new error handler to be set. This parameter can be null.

getErrorHandler

public org.xml.sax.ErrorHandler getErrorHandler()

Gets the current ErrorHandler

Returns:

This method returns the object that was last set through the setErrorHandler(org.xml.sax.ErrorHandler) method, or null if that method has never been called

See Also:

setErrorHandler(org.xml.sax.ErrorHandler)

setResourceResolver

public void setResourceResolver(org.w3c.dom.ls.LSResourceResolver resourceResolver)

Sets the LSResourceResolver to customize resource resolution while in a validation episode.

Parameters:

resourceResolver - A new resource resolver to be set. This parameter can be null.

getResourceResolver

public org.w3c.dom.ls.LSResourceResolver getResourceResolver()

Gets the current LSResourceResolver

Returns:

This method returns the object that was last set through the setResourceResolver(org.w3c.dom.ls.LSResourceResolver) method, or null if that method has never been called

getTypeInfoProvider

public javax.xml.validation.TypeInfoProvider getTypeInfoProvider()

Obtains the TypeInfoProvider implementation of this ValidatorHandler. The obtained TypeInfoProvider can be queried during a parse to access the type information determined by the validator.

Returns:

A non-null valid TypeInfoProvider.

setDocumentLocator

public void setDocumentLocator(org.xml.sax.Locator locator)

Receive an object for locating the origin of SAX document events.

Specified by:

setDocumentLocator in interface org.xml.sax.ContentHandler

Parameters:

locator - an object that can return the location of any SAX document event

See Also:

Locator

getProperty

public java.lang.Object getProperty(java.lang.String name)
                             throws org.xml.sax.SAXNotRecognizedException,
                                    org.xml.sax.SAXNotSupportedException

Look up the value of a property.

The property name is any fully-qualified URI. It is possible for a ValidatorHandler to recognize a property name but temporarily be unable to return its value. Some property values may be available only in specific contexts, such as before, during, or after a validation.

Validators are not required to recognize any specific property names.

In the Saxon implementation, the property names that are recognized are the same as the attribute names recognised by a TransformerFactory. These are listed as constant fields in the class FeatureKeys

Parameters:

name - The property name, which is a non-null fully-qualified URI.

Returns:

The current value of the property.

Throws:

org.xml.sax.SAXNotRecognizedException - If the property value can't be assigned or retrieved.

org.xml.sax.SAXNotSupportedException - When the XMLReader recognizes the property name but cannot determine its value at this time.

java.lang.NullPointerException - When the name parameter is null.

See Also:

setProperty(String, Object)

setProperty

public void setProperty(java.lang.String name,
                        java.lang.Object object)
                 throws org.xml.sax.SAXNotRecognizedException,
                        org.xml.sax.SAXNotSupportedException

Set the value of a property.

The property name is any fully-qualified URI. It is possible for a ValidatorHandler to recognize a property name but to be unable to change the current value. Some property values may be immutable or mutable only in specific contexts, such as before, during, or after a validation.

In the Saxon implementation, the property names that are recognized are the same as the attribute names recognised by a TransformerFactory. These are listed as constant fields in the class FeatureKeys

Parameters:

name - The property name, which is a non-null fully-qualified URI.

object - The requested value for the property.

Throws:

org.xml.sax.SAXNotRecognizedException - If the property value can't be assigned or retrieved.

org.xml.sax.SAXNotSupportedException - When the Validator recognizes the property name but cannot set the requested value.

java.lang.NullPointerException - When the name parameter is null.

getConfiguration

public Configuration getConfiguration()

Get the Configuration object

startDocument

public void startDocument()
                   throws org.xml.sax.SAXException

Receive notification of the beginning of a document.

The SAX parser will invoke this method only once, before any other event callbacks (except for setDocumentLocator).

Specified by:

startDocument in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException - any SAX exception, possibly wrapping another exception

See Also:

endDocument()

endDocument

public void endDocument()
                 throws org.xml.sax.SAXException

Receive notification of the end of a document.

Specified by:

endDocument in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException - any SAX exception, possibly wrapping another exception

See Also:

ContentHandler.startDocument()

startPrefixMapping

public void startPrefixMapping(java.lang.String prefix,
                               java.lang.String uri)
                        throws org.xml.sax.SAXException

Begin the scope of a prefix-URI Namespace mapping.

There should never be start/endPrefixMapping events for the "xml" prefix, since it is predeclared and immutable.

Specified by:

startPrefixMapping in interface org.xml.sax.ContentHandler

Parameters:

prefix - the Namespace prefix being declared. An empty string is used for the default element namespace, which has no prefix.

uri - the Namespace URI the prefix is mapped to

Throws:

org.xml.sax.SAXException - the client may throw an exception during processing

See Also:

endPrefixMapping(java.lang.String), startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)

endPrefixMapping

public void endPrefixMapping(java.lang.String prefix)
                      throws org.xml.sax.SAXException

End the scope of a prefix-URI mapping.

Specified by:

endPrefixMapping in interface org.xml.sax.ContentHandler

Parameters:

prefix - the prefix that was being mapped. This is the empty string when a default mapping scope ends.

Throws:

org.xml.sax.SAXException - the client may throw an exception during processing

See Also:

ContentHandler.startPrefixMapping(java.lang.String, java.lang.String), ContentHandler.endElement(java.lang.String, java.lang.String, java.lang.String)

startElement

public void startElement(java.lang.String uri,
                         java.lang.String localName,
                         java.lang.String qName,
                         org.xml.sax.Attributes atts)
                  throws org.xml.sax.SAXException

Receive notification of the beginning of an element.

Specified by:

startElement in interface org.xml.sax.ContentHandler

Parameters:

uri - the Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed

localName - the local name (without prefix), or the empty string if Namespace processing is not being performed

qName - the qualified name (with prefix), or the empty string if qualified names are not available

atts - the attributes attached to the element. If there are no attributes, it shall be an empty Attributes object. The value of this object after startElement returns is undefined

Throws:

org.xml.sax.SAXException - any SAX exception, possibly wrapping another exception

See Also:

ContentHandler.endElement(java.lang.String, java.lang.String, java.lang.String), Attributes

endElement

public void endElement(java.lang.String uri,
                       java.lang.String localName,
                       java.lang.String qName)
                throws org.xml.sax.SAXException

Receive notification of the end of an element.

Specified by:

endElement in interface org.xml.sax.ContentHandler

Parameters:

localName - The local name (without prefix), or the empty string if Namespace processing is not being performed.

qName - The qualified XML 1.0 name (with prefix), or the empty string if qualified names are not available.

Throws:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

characters

public void characters(char[] ch,
                       int start,
                       int length)
                throws org.xml.sax.SAXException

Receive notification of character data.

Specified by:

characters in interface org.xml.sax.ContentHandler

Parameters:

ch - The characters from the XML document.

start - The start position in the array.

length - The number of characters to read from the array.

Throws:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

ContentHandler.ignorableWhitespace(char[], int, int), Locator

ignorableWhitespace

public void ignorableWhitespace(char[] ch,
                                int start,
                                int length)
                         throws org.xml.sax.SAXException

Receive notification of ignorable whitespace in element content.

Specified by:

ignorableWhitespace in interface org.xml.sax.ContentHandler

Parameters:

ch - The characters from the XML document.

start - The start position in the array.

length - The number of characters to read from the array.

Throws:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

ContentHandler.characters(char[], int, int)

processingInstruction

public void processingInstruction(java.lang.String target,
                                  java.lang.String data)
                           throws org.xml.sax.SAXException

Receive notification of a processing instruction.

Specified by:

processingInstruction in interface org.xml.sax.ContentHandler

Parameters:

target - The processing instruction target.

data - The processing instruction data, or null if none was supplied. The data does not include any whitespace separating it from the target.

Throws:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

skippedEntity

public void skippedEntity(java.lang.String name)
                   throws org.xml.sax.SAXException

Receive notification of a skipped entity.

Specified by:

skippedEntity in interface org.xml.sax.ContentHandler

Parameters:

name - The name of the skipped entity. If it is a parameter entity, the name will begin with '%', and if it is the external DTD subset, it will be the string "[dtd]".

Throws:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

startDTD

public void startDTD(java.lang.String name,
                     java.lang.String publicId,
                     java.lang.String systemId)
              throws org.xml.sax.SAXException

Report the start of DTD declarations, if any.

Specified by:

startDTD in interface org.xml.sax.ext.LexicalHandler

Parameters:

name - The document type name.

publicId - The declared public identifier for the external DTD subset, or null if none was declared.

systemId - The declared system identifier for the external DTD subset, or null if none was declared.

Throws:

org.xml.sax.SAXException - The application may raise an exception.

See Also:

LexicalHandler.endDTD(), LexicalHandler.startEntity(java.lang.String)

endDTD

public void endDTD()
            throws org.xml.sax.SAXException

Report the end of DTD declarations.

Specified by:

endDTD in interface org.xml.sax.ext.LexicalHandler

Throws:

org.xml.sax.SAXException - The application may raise an exception.

See Also:

LexicalHandler.startDTD(java.lang.String, java.lang.String, java.lang.String)

startEntity

public void startEntity(java.lang.String name)
                 throws org.xml.sax.SAXException

Report the beginning of some internal and external XML entities.

Specified by:

startEntity in interface org.xml.sax.ext.LexicalHandler

Parameters:

name - The name of the entity. If it is a parameter entity, the name will begin with '%', and if it is the external DTD subset, it will be "[dtd]".

Throws:

org.xml.sax.SAXException - The application may raise an exception.

See Also:

LexicalHandler.endEntity(java.lang.String), DeclHandler.internalEntityDecl(java.lang.String, java.lang.String), DeclHandler.externalEntityDecl(java.lang.String, java.lang.String, java.lang.String)

endEntity

public void endEntity(java.lang.String name)
               throws org.xml.sax.SAXException

Report the end of an entity.

Specified by:

endEntity in interface org.xml.sax.ext.LexicalHandler

Parameters:

name - The name of the entity that is ending.

Throws:

org.xml.sax.SAXException - The application may raise an exception.

See Also:

LexicalHandler.startEntity(java.lang.String)

startCDATA

public void startCDATA()
                throws org.xml.sax.SAXException

Report the start of a CDATA section.

Specified by:

startCDATA in interface org.xml.sax.ext.LexicalHandler

Throws:

org.xml.sax.SAXException - The application may raise an exception.

See Also:

LexicalHandler.endCDATA()

endCDATA

public void endCDATA()
              throws org.xml.sax.SAXException

Report the end of a CDATA section.

Specified by:

endCDATA in interface org.xml.sax.ext.LexicalHandler

Throws:

org.xml.sax.SAXException - The application may raise an exception.

See Also:

LexicalHandler.startCDATA()

comment

public void comment(char[] ch,
                    int start,
                    int length)
             throws org.xml.sax.SAXException

Report an XML comment anywhere in the document.

Specified by:

comment in interface org.xml.sax.ext.LexicalHandler

Parameters:

ch - An array holding the characters in the comment.

start - The starting position in the array.

length - The number of characters to use from the array.

Throws:

org.xml.sax.SAXException - The application may raise an exception.

notationDecl

public void notationDecl(java.lang.String name,
                         java.lang.String publicId,
                         java.lang.String systemId)
                  throws org.xml.sax.SAXException

Receive notification of a notation declaration event.

Specified by:

notationDecl in interface org.xml.sax.DTDHandler

Parameters:

name - The notation name.

publicId - The notation's public identifier, or null if none was given.

systemId - The notation's system identifier, or null if none was given.

Throws:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

DTDHandler.unparsedEntityDecl(java.lang.String, java.lang.String, java.lang.String, java.lang.String), AttributeList

unparsedEntityDecl

public void unparsedEntityDecl(java.lang.String name,
                               java.lang.String publicId,
                               java.lang.String systemId,
                               java.lang.String notationName)
                        throws org.xml.sax.SAXException

Receive notification of an unparsed entity declaration event.

Specified by:

unparsedEntityDecl in interface org.xml.sax.DTDHandler

Parameters:

name - The unparsed entity's name.

publicId - The entity's public identifier, or null if none was given.

systemId - The entity's system identifier.

Throws:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

DTDHandler.notationDecl(java.lang.String, java.lang.String, java.lang.String), AttributeList