public abstract Class ValidatorHandler

Gets the ContentHandler which receives the augmented validation result.

Returns:ContentHandler

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(ContentHandler)

Gets the current ErrorHandler set to this ValidatorHandler.

Returns:ErrorHandler

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

See Also

setErrorHandler(ErrorHandler)

Look up the value of a feature flag.

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

Implementors are free (and encouraged) to invent their own features, using names built on their own URIs.

Parameters

name:String

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

Returns:boolean

The current value of the feature (true or false).

Exceptions

SAXNotRecognizedException:

If the feature value can't be assigned or retrieved.

SAXNotSupportedException:

When the ValidatorHandler recognizes the feature name but cannot determine its value at this time.

NullPointerException:

When name is null.

See Also

setFeature(String, boolean)

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.

ValidatorHandlers are not required to recognize any specific property names.

Implementors are free (and encouraged) to invent their own properties, using names built on their own URIs.

Parameters

name:String

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

Returns:Object

The current value of the property.

Exceptions

SAXNotRecognizedException:

If the property value can't be assigned or retrieved.

SAXNotSupportedException:

When the XMLReader recognizes the property name but cannot determine its value at this time.

NullPointerException:

When name is null.

See Also

setProperty(String, Object)

Gets the current LSResourceResolver set to this ValidatorHandler.

Returns:LSResourceResolver

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

See Also

setErrorHandler(ErrorHandler)

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.

Some schema languages do not define the notion of type, for those languages, this method may not be supported. However, to be compliant with this specification, implementations for W3C XML Schema 1.0 must support this operation.

Returns:TypeInfoProvider

null if the validator / schema language does not support the notion of org.w3c.dom.TypeInfo. Otherwise a non-null valid TypeInfoProvider.

Sets the ContentHandler which receives the augmented validation result.

When a ContentHandler is specified, a ValidatorHandler will work as a filter and basically copy the incoming events to the specified ContentHandler.

In doing so, a ValidatorHandler may modify the events, for example by adding defaulted attributes.

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.
2. ValidatorHandler may not introduce new elements that were not present in the input.
3. ValidatorHandler may not remove attributes that were present in the input.

When a callback method on the specified ContentHandler throws an exception, the same exception object must be thrown from the ValidatorHandler. The ErrorHandler should not be notified of such an exception.

This method can be called even during a middle of a validation.

Parameters

receiver:ContentHandler

A ContentHandler or a null value.

Sets the ErrorHandler to receive errors encountered during the validation.

Error handler can be used to customize the error handling process during a validation. When an ErrorHandler is set, errors found during the validation will be first sent to the ErrorHandler.

The error handler can abort further validation immediately by throwing org.xml.sax.SAXException from the handler. Or for example it can print an error to the screen and try to continue the validation by returning normally from the ErrorHandler

If any Throwable is thrown from an ErrorHandler, the same Throwable object will be thrown toward the root of the call stack.

ValidatorHandler is not allowed to throw org.xml.sax.SAXException without first reporting it to ErrorHandler.

When the ErrorHandler is null, the implementation will behave as if the following ErrorHandler is set:

class DraconianErrorHandler implements ErrorHandler {
    public void fatalError( org.xml.sax.SAXParseException e ) throws org.xml.sax.SAXException {
        throw e;
    }
    public void error( org.xml.sax.SAXParseException e ) throws org.xml.sax.SAXException {
        throw e;
    }
    public void warning( org.xml.sax.SAXParseException e ) throws org.xml.sax.SAXException {
        // noop
    }
}

When a new ValidatorHandler object is created, initially this field is set to null.

Parameters

errorHandler:ErrorHandler

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

Set a feature for this ValidatorHandler.

Feature can be used to control the way a ValidatorHandler parses schemas. The feature name is any fully-qualified URI. It is possible for a SchemaFactory to expose a feature value but to be unable to change the current value. Some feature values may be immutable or mutable only in specific contexts, such as before, during, or after a validation.

All implementations are required to support the javax.xml.XMLConstants#FEATURE_SECURE_PROCESSING feature. When the feature is:

• true: the implementation will limit XML processing to conform to implementation limits. Examples include entity expansion limits and XML Schema constructs that would consume large amounts of resources. If XML processing is limited for security reasons, it will be reported via a call to the registered ErrorHandler#fatalError(SAXParseException exception). See setErrorHandler(ErrorHandler errorHandler).
• false: the implementation will processing XML according to the XML specifications without regard to possible implementation limits.

Parameters

name:String

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

value:boolean

The requested value of the feature (true or false).

Exceptions

SAXNotRecognizedException:

If the feature value can't be assigned or retrieved.

SAXNotSupportedException:

When the ValidatorHandler recognizes the feature name but cannot set the requested value.

NullPointerException:

When name is null.

See Also

getFeature(String)

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.

ValidatorHandlers are not required to recognize setting any specific property names.

Parameters

name:String

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

object:Object

The requested value for the property.

Exceptions

SAXNotRecognizedException:

If the property value can't be assigned or retrieved.

SAXNotSupportedException:

When the ValidatorHandler recognizes the property name but cannot set the requested value.

NullPointerException:

When name is null.

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

ValidatorHandler uses a LSResourceResolver when it needs to locate external resources while a validation, although exactly what constitutes "locating external resources" is up to each schema language.

When the LSResourceResolver is null, the implementation will behave as if the following LSResourceResolver is set:

class DumbLSResourceResolver implements LSResourceResolver {
    public org.w3c.dom.ls.LSInput resolveResource(
        String publicId, String systemId, String baseURI) {

        return null; // always return null
    }
}

If a LSResourceResolver throws a RuntimeException (or instances of its derived classes), then the ValidatorHandler will abort the parsing and the caller of the validate method will receive the same RuntimeException.

When a new ValidatorHandler object is created, initially this field is set to null.

Parameters

resourceResolver:LSResourceResolver

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