net.sf.saxon.s9api

Class SchemaValidator

public class SchemaValidator extends Object implements Destination

A SchemaValidator is an object that is used for validating instance documents against a schema. The schema consists of the collection of schema components that are available within the schema cache maintained by the SchemaManager, together with any additional schema components located during the course of validation by means of an xsl:schemaLocation or xsi:noNamespaceSchemaLocation attribute within the instance document.

If validation fails, an exception is thrown. If validation succeeds, the validated document can optionally be written to a specified destination. This will be a copy of the original document, augmented with default values for absent elements and attributes, and carrying type annotations derived from the schema processing. Expansion of defaults can be suppressed by means of the method SchemaValidator.

A SchemaValidator is serially resuable but not thread-safe. That is, it should normally be used in the thread where it is created, but it can be used more than once, to validate multiple input documents.

A SchemaValidator is a Destination, which allows it to receive the output of a query or transformation to be validated.

Saxon does not deliver the full PSVI as described in the XML schema specifications, only the subset of the PSVI properties featured in the XDM data model.

Constructor Summary
protected SchemaValidator(Configuration config)
Method Summary
DestinationgetDestination()
Get the Destination that will receive the validated document.
QNamegetDocumentElementName()
Get the name of the required top-level element of the document to be validated.
protected SchemaTypegetDocumentElementType()
Get the schema type against which the document element is to be validated
QNamegetDocumentElementTypeName()
Get the name of the required type of the top-level element of the document to be validated.
ErrorListenergetErrorListener()
Get the ErrorListener being used while validating instance documents
ReceivergetReceiver(Configuration config)
booleanisExpandAttributeDefaults()
Ask whether attribute defaults defined in a schema are to be expanded or not (by default, fixed and default attribute values are expanded, that is, they are inserted into the document during validation as if they were present in the instance being validated)
booleanisLax()
Ask whether validation is to be in lax mode.
booleanisUseXsiSchemaLocation()
Ask whether the schema processor is to take account of any xsi:schemaLocation and xsi:noNamespaceSchemaLocation attributes encountered while validating an instance document
voidsetDestination(Destination destination)
Set the Destination to receive the validated document.
voidsetDocumentElementName(QName name)
Set the name of the required top-level element of the document to be validated (that is, the name of the outermost element of the document).
voidsetDocumentElementTypeName(QName name)
Set the name of the required type of the top-level element of the document to be validated.
voidsetErrorListener(ErrorListener listener)
Set the ErrorListener to be used while validating instance documents.
voidsetExpandAttributeDefaults(boolean expand)
Set whether attribute defaults defined in a schema are to be expanded or not (by default, fixed and default attribute values are expanded, that is, they are inserted into the document during validation as if they were present in the instance being validated)
voidsetLax(boolean lax)
The validation mode may be either strict or lax.
voidsetUseXsiSchemaLocation(boolean recognize)
Say whether the schema processor is to take account of any xsi:schemaLocation and xsi:noNamespaceSchemaLocation attributes encountered while validating an instance document
voidvalidate(Source source)
Validate an instance document supplied as a Source object

Constructor Detail

SchemaValidator

protected SchemaValidator(Configuration config)

Method Detail

getDestination

public Destination getDestination()
Get the Destination that will receive the validated document. Return null if no destination has been set.

Returns: the destination to receive the validated document, or null if none has been supplied

getDocumentElementName

public QName getDocumentElementName()
Get the name of the required top-level element of the document to be validated.

Returns: the name of the required document element, or null if no value has been set.

getDocumentElementType

protected SchemaType getDocumentElementType()
Get the schema type against which the document element is to be validated

Returns: the schema type

getDocumentElementTypeName

public QName getDocumentElementTypeName()
Get the name of the required type of the top-level element of the document to be validated.

Returns: the name of the required type of the document element, or null if no value has been set.

getErrorListener

public ErrorListener getErrorListener()
Get the ErrorListener being used while validating instance documents

Returns: listener The error listener in use. This is notified of all errors detected during the validation episode. Returns null if no user-supplied ErrorListener has been set.

getReceiver

public Receiver getReceiver(Configuration config)

isExpandAttributeDefaults

public boolean isExpandAttributeDefaults()
Ask whether attribute defaults defined in a schema are to be expanded or not (by default, fixed and default attribute values are expanded, that is, they are inserted into the document during validation as if they were present in the instance being validated)

Returns: true if defaults are to be expanded, false if not

isLax

public boolean isLax()
Ask whether validation is to be in lax mode.

Returns: true if validation is to be in lax mode, false if it is to be in strict mode.

isUseXsiSchemaLocation

public boolean isUseXsiSchemaLocation()
Ask whether the schema processor is to take account of any xsi:schemaLocation and xsi:noNamespaceSchemaLocation attributes encountered while validating an instance document

Returns: true if these two attributes are to be recognized; false if they are to be ignored. Default is true.

setDestination

public void setDestination(Destination destination)
Set the Destination to receive the validated document. If no destination is supplied, the validated document is discarded.

Parameters: destination the destination to receive the validated document

setDocumentElementName

public void setDocumentElementName(QName name)
Set the name of the required top-level element of the document to be validated (that is, the name of the outermost element of the document). If no value is supplied, there is no constraint on the required element name

Parameters: name the name of the document element, as a QName; or null to remove a previously-specified value.

setDocumentElementTypeName

public void setDocumentElementTypeName(QName name)
Set the name of the required type of the top-level element of the document to be validated. If no value is supplied, there is no constraint on the required type

Parameters: name the name of the type of the document element, as a QName; or null to remove a previously-specified value. This must be the name of a type in the schema (typically but not necessarily a complex type).

Throws: SaxonApiException if there is no known type with this name

setErrorListener

public void setErrorListener(ErrorListener listener)
Set the ErrorListener to be used while validating instance documents.

Parameters: listener The error listener to be used. This is notified of all errors detected during the validation episode.

setExpandAttributeDefaults

public void setExpandAttributeDefaults(boolean expand)
Set whether attribute defaults defined in a schema are to be expanded or not (by default, fixed and default attribute values are expanded, that is, they are inserted into the document during validation as if they were present in the instance being validated)

Parameters: expand true if defaults are to be expanded, false if not

setLax

public void setLax(boolean lax)
The validation mode may be either strict or lax. The default is strict; this method may be called to indicate that lax validation is required. With strict validation, validation fails if no element declaration can be located for the outermost element. With lax validation, the absence of an element declaration results in the content being considered valid.

Parameters: lax true if validation is to be lax, false if it is to be strict

setUseXsiSchemaLocation

public void setUseXsiSchemaLocation(boolean recognize)
Say whether the schema processor is to take account of any xsi:schemaLocation and xsi:noNamespaceSchemaLocation attributes encountered while validating an instance document

Parameters: recognize true if these two attributes are to be recognized; false if they are to be ignored. Default is true.

validate

public void validate(Source source)
Validate an instance document supplied as a Source object

Parameters: source the instance document to be validated. The call getSystemId() applied to this source object must return the base URI used for dereferencing any xsi:schemaLocation or xsi:noNamespaceSchemaLocation attributes

Throws: SaxonApiException if the source document is found to be invalid