com.saxonica.jaxp
Class ValidatingReader

java.lang.Object
  com.saxonica.jaxp.ValidatingReader

All Implemented Interfaces:

XMLReader

public class ValidatingReader
extends Object
implements XMLReader

This class is a Saxon implementation of XMLReader that performs schema validation using Saxon's schema processor.

This class is supplied for the benefit of applications that expect to perform validation by creating a validating SAX parser; it allows such applications to take advantage of the Saxon validator with no change to the application.

Constructor Summary

ValidatingReader()
Create a ValidatingReader.

ValidatingReader(EnterpriseConfiguration config)
Create a ValidatingReader that uses a specified Saxon Configuration.

ValidatingReader(EnterpriseConfiguration config, XMLReader parser)
Create a ValidatingReader based on a supplied Saxon Configuration and a supplied (presumably non-validating) XMLReader to perform the underlying XML parsing.

Method Summary

ContentHandler	getContentHandler() Return the current content handler.
DTDHandler	getDTDHandler() Return the current DTD handler.
EntityResolver	getEntityResolver() Return the current entity resolver.
ErrorHandler	getErrorHandler() Return the current error handler.
boolean	getFeature(String name) Look up the value of a feature flag.
Object	getProperty(String name) Look up the value of a property.
void	parse(InputSource input) Parse an XML document.
void	parse(String systemId) Parse an XML document from a system identifier (URI).
void	setContentHandler(ContentHandler handler) Allow an application to register a content event handler.
void	setDTDHandler(DTDHandler handler) Allow an application to register a DTD event handler.
void	setEntityResolver(EntityResolver resolver) Allow an application to register an entity resolver.
void	setErrorHandler(ErrorHandler handler) Allow an application to register an error event handler.
void	setFeature(String name, boolean value) Set the value of a feature flag.
void	setProperty(String name, Object value) Set the value of a property.

Methods inherited from class java.lang.Object

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

Constructor Detail

ValidatingReader

public ValidatingReader()

Create a ValidatingReader. When this option is used, the only way to supply the schema to be used for validation is through the xsi:schemaLocation attribute in the source document.

ValidatingReader

public ValidatingReader(EnterpriseConfiguration config)

Create a ValidatingReader that uses a specified Saxon Configuration.

Parameters:

config - the Saxon Configuration. The Configuration can be pre-initialized with configuration options; it can also contain a pre-loaded cache of schema components to be used for validation

ValidatingReader

public ValidatingReader(EnterpriseConfiguration config,
                        XMLReader parser)

Create a ValidatingReader based on a supplied Saxon Configuration and a supplied (presumably non-validating) XMLReader to perform the underlying XML parsing.

Parameters:

config - the Saxon Configuration. The Configuration can be pre-initialized with configuration options; it can also contain a pre-loaded cache of schema components to be used for validation

parser - The XML parser to be used

Method Detail

getFeature

public boolean getFeature(String name)
                   throws SAXNotRecognizedException,
                          SAXNotSupportedException

Look up the value of a feature flag.

Specified by:

getFeature in interface XMLReader

Parameters:

name - The names that are recognized are the union of (a) the flags recognized by the underlying SAX XMLReader, and (b) the properties of the Saxon Configuration that have boolean values. A feature name starting with "http://saxon.sf.net" is assumed to be in the second category; these features are listed in FeatureKeys.

Returns:

the value of the feature if the name is recognized

Throws:

SAXNotRecognizedException - if the feature name is not recognized

SAXNotSupportedException

setFeature

public void setFeature(String name,
                       boolean value)
                throws SAXNotRecognizedException,
                       SAXNotSupportedException

Set the value of a feature flag.

Specified by:

setFeature in interface XMLReader

Parameters:

name - The names that are recognized are the union of (a) the flags recognized by the underlying SAX XMLReader, and (b) the properties of the Saxon Configuration that have boolean values. A feature name starting with "http://saxon.sf.net" is assumed to be in the second category; these features are listed in FeatureKeys.

value - true or false

Throws:

SAXNotRecognizedException - if the feature name is not recognized, or if it is the name of a Saxon configuration property whose value is not boolean

SAXNotSupportedException

getProperty

public Object getProperty(String name)
                   throws SAXNotRecognizedException,
                          SAXNotSupportedException

Look up the value of a property.

Specified by:

getProperty in interface XMLReader

Parameters:

name - The names that are recognized are the union of (a) the properties recognized by the underlying SAX XMLReader, and (b) the properties of the Saxon Configuration. A feature name starting with "http://saxon.sf.net" is assumed to be in the second category; these features are listed in FeatureKeys.

Returns:

the value of the property if the name is recognized

Throws:

SAXNotRecognizedException - if the property name is not recognized

SAXNotSupportedException

setProperty

public void setProperty(String name,
                        Object value)
                 throws SAXNotRecognizedException,
                        SAXNotSupportedException

Set the value of a property.

Specified by:

setProperty in interface XMLReader

Parameters:

name - The names that are recognized are the union of (a) the properties recognized by the underlying SAX XMLReader, and (b) the properties of the Saxon Configuration. A feature name starting with "http://saxon.sf.net" is assumed to be in the second category; these features are listed in FeatureKeys.

Saxon accepts the Apache-defined properties http://apache.org/xml/properties/schema/external-noNamespaceSchemaLocation and http://apache.org/xml/properties/schema/external-schemaLocation to define the location of schema documents. These properties may be set repeatedly to load more than one schema document.

To enable schema validation using XSD 1.1, the property FeatureKeys.XSD_VERSION must be set to the value "1.1".

value - the value of the property

Throws:

SAXNotRecognizedException - if the property name is not recognized, or if the value is inappropriate

SAXNotSupportedException

setEntityResolver

public void setEntityResolver(EntityResolver resolver)

Allow an application to register an entity resolver.

If the application does not register an entity resolver, the XMLReader will perform its own default resolution.

Applications may register a new or different resolver in the middle of a parse, and the SAX parser must begin using the new resolver immediately.

Specified by:

setEntityResolver in interface XMLReader

Parameters:

resolver - The entity resolver.

See Also:

getEntityResolver()

getEntityResolver

public EntityResolver getEntityResolver()

Return the current entity resolver.

Specified by:

getEntityResolver in interface XMLReader

Returns:

The current entity resolver, or null if none has been registered.

See Also:

setEntityResolver(org.xml.sax.EntityResolver)

setDTDHandler

public void setDTDHandler(DTDHandler handler)

Allow an application to register a DTD event handler.

If the application does not register a DTD handler, all DTD events reported by the SAX parser will be silently ignored.

Applications may register a new or different handler in the middle of a parse, and the SAX parser must begin using the new handler immediately.

Specified by:

setDTDHandler in interface XMLReader

Parameters:

handler - The DTD handler.

See Also:

getDTDHandler()

getDTDHandler

public DTDHandler getDTDHandler()

Return the current DTD handler.

Specified by:

getDTDHandler in interface XMLReader

Returns:

The current DTD handler, or null if none has been registered.

See Also:

setDTDHandler(org.xml.sax.DTDHandler)

setContentHandler

public void setContentHandler(ContentHandler handler)

Allow an application to register a content event handler.

If the application does not register a content handler, all content events reported by the SAX parser will be silently ignored.

Applications may register a new or different handler in the middle of a parse, and the SAX parser must begin using the new handler immediately.

Specified by:

setContentHandler in interface XMLReader

Parameters:

handler - The content handler.

See Also:

getContentHandler()

getContentHandler

public ContentHandler getContentHandler()

Return the current content handler.

Specified by:

getContentHandler in interface XMLReader

Returns:

The current content handler, or null if none has been registered.

See Also:

setContentHandler(org.xml.sax.ContentHandler)

setErrorHandler

public void setErrorHandler(ErrorHandler handler)

Allow an application to register an error event handler.

If the application does not register an error handler, all error events reported by the SAX parser will be silently ignored; however, normal processing may not continue. It is highly recommended that all SAX applications implement an error handler to avoid unexpected bugs.

Applications may register a new or different handler in the middle of a parse, and the SAX parser must begin using the new handler immediately.

Specified by:

setErrorHandler in interface XMLReader

Parameters:

handler - The error handler.

See Also:

getErrorHandler()

getErrorHandler

public ErrorHandler getErrorHandler()

Return the current error handler.

Specified by:

getErrorHandler in interface XMLReader

Returns:

The current error handler, or null if none has been registered.

See Also:

setErrorHandler(org.xml.sax.ErrorHandler)

parse

public void parse(InputSource input)
           throws IOException,
                  SAXException

Parse an XML document.

The application can use this method to instruct the XML reader to begin parsing an XML document from any valid input source (a character stream, a byte stream, or a URI).

Applications may not invoke this method while a parse is in progress (they should create a new XMLReader instead for each nested XML document). Once a parse is complete, an application may reuse the same XMLReader object, possibly with a different input source. Configuration of the XMLReader object (such as handler bindings and values established for feature flags and properties) is unchanged by completion of a parse, unless the definition of that aspect of the configuration explicitly specifies other behavior. (For example, feature flags or properties exposing characteristics of the document being parsed.)

During the parse, the XMLReader will provide information about the XML document through the registered event handlers.

This method is synchronous: it will not return until parsing has ended. If a client application wants to terminate parsing early, it should throw an exception.

Specified by:

parse in interface XMLReader

Parameters:

input - The input source for the top-level of the XML document.

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

IOException - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

See Also:

InputSource, parse(String), setEntityResolver(org.xml.sax.EntityResolver), setDTDHandler(org.xml.sax.DTDHandler), setContentHandler(org.xml.sax.ContentHandler), setErrorHandler(org.xml.sax.ErrorHandler)

parse

public void parse(String systemId)
           throws IOException,
                  SAXException

Parse an XML document from a system identifier (URI).

This method is a shortcut for the common case of reading a document from a system identifier. It is the exact equivalent of the following:

 parse(new InputSource(systemId));
 

If the system identifier is a URL, it must be fully resolved by the application before it is passed to the parser.

Specified by:

parse in interface XMLReader

Parameters:

systemId - The system identifier (URI).

Throws:

SAXException - Any SAX exception, possibly wrapping another exception.

IOException - An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.

See Also:

parse(org.xml.sax.InputSource)