QXmlSchemaValidator¶

Note

This class was introduced in Qt 4.6

Synopsis¶

Functions¶

def messageHandler ()
def namePool ()
def networkAccessManager ()
def schema ()
def setMessageHandler (handler)
def setNetworkAccessManager (networkmanager)
def setSchema (schema)
def setUriResolver (resolver)
def uriResolver ()
def validate (data[, documentUri=QUrl()])
def validate (source)
def validate (source[, documentUri=QUrl()])

Detailed Description¶

The PySide.QtXmlPatterns.QXmlSchemaValidator class validates XML instance documents against a W3C XML Schema.

The PySide.QtXmlPatterns.QXmlSchemaValidator class loads, parses an XML instance document and validates it against a W3C XML Schema that has been compiled with PySide.QtXmlPatterns.QXmlSchema .

The following example shows how to load a XML Schema from a local file, check whether it is a valid schema document and use it for validation of an XML instance document:
schemaUrl = QUrl("file:///home/user/schema.xsd")

schema = QXmlSchema()
schema.load(schemaUrl)

if schema.isValid():
    file = QFile("test.xml")
    file.open(QIODevice.ReadOnly)

    validator = QXmlSchemaValidator(schema)
    if validator.validate(file, QUrl.fromLocalFile(file.fileName())):
        print "instance document is valid"
    else:
        print "instance document is invalid"
}

XML Schema Version¶

This class implements schema validation according to the XML Schema 1.0 specification.

See also

PySide.QtXmlPatterns.QXmlSchema XML Schema Validation Example

class PySide.QtXmlPatterns.QXmlSchemaValidator¶

class PySide.QtXmlPatterns.QXmlSchemaValidator(schema)

Parameters:	schema – `PySide.QtXmlPatterns.QXmlSchema`

Constructs a schema validator. The schema used for validation must be referenced in the XML instance document via the xsi:schemaLocation or xsi:noNamespaceSchemaLocation attribute.

Constructs a schema validator that will use schema for validation. If an empty PySide.QtXmlPatterns.QXmlSchema schema is passed to the validator, the schema used for validation must be referenced in the XML instance document via the xsi:schemaLocation or xsi:noNamespaceSchemaLocation attribute.

PySide.QtXmlPatterns.QXmlSchemaValidator.messageHandler()¶

Return type:	`PySide.QtXmlPatterns.QAbstractMessageHandler`

Returns the message handler that handles parsing and validation messages for this PySide.QtXmlPatterns.QXmlSchemaValidator .

PySide.QtXmlPatterns.QXmlSchemaValidator.namePool()¶

Return type:	`PySide.QtXmlPatterns.QXmlNamePool`

Returns the name pool used by this PySide.QtXmlPatterns.QXmlSchemaValidator for constructing names . There is no setter for the name pool, because mixing name pools causes errors due to name confusion.

PySide.QtXmlPatterns.QXmlSchemaValidator.networkAccessManager()¶

Return type:	`PySide.QtNetwork.QNetworkAccessManager`

Returns the network manager, or 0 if it has not been set.

PySide.QtXmlPatterns.QXmlSchemaValidator.schema()¶

Return type:	QXmlSchema*

Returns the schema that is used for validation.

PySide.QtXmlPatterns.QXmlSchemaValidator.setMessageHandler(handler)¶

Parameters:	handler – `PySide.QtXmlPatterns.QAbstractMessageHandler`

Changes the message handler for this PySide.QtXmlPatterns.QXmlSchemaValidator to handler . The schema validator sends all parsing and validation messages to this message handler. PySide.QtXmlPatterns.QXmlSchemaValidator does not take ownership of handler .

Normally, the default message handler is sufficient. It writes compile and validation messages to stderr . The default message handler includes color codes if stderr can render colors.

When PySide.QtXmlPatterns.QXmlSchemaValidator calls QAbstractMessageHandler.message() , the arguments are as follows:

message() argument	Semantics
`QtMsgType` type	Only `QtWarningMsg` and `QtFatalMsg` are used. The former identifies a warning, while the latter identifies an error.
const `PySide.QtCore.QString` & description	An XHTML document which is the actual message. It is translated into the current language.
const `PySide.QtCore.QUrl` &identifier	Identifies the error with a URI, where the fragment is the error code, and the rest of the URI is the error namespace.
const `PySide.QtXmlPatterns.QSourceLocation` & sourceLocation	Identifies where the error occurred.

PySide.QtXmlPatterns.QXmlSchemaValidator.setNetworkAccessManager(networkmanager)¶

Parameters:	networkmanager – `PySide.QtNetwork.QNetworkAccessManager`

Sets the network manager to manager . PySide.QtXmlPatterns.QXmlSchemaValidator does not take ownership of manager .

PySide.QtXmlPatterns.QXmlSchemaValidator.setSchema(schema)¶

Parameters:	schema – `PySide.QtXmlPatterns.QXmlSchema`

Sets the schema that shall be used for further validation. If the schema is empty, the schema used for validation must be referenced in the XML instance document via the xsi:schemaLocation or xsi:noNamespaceSchemaLocation attribute.

PySide.QtXmlPatterns.QXmlSchemaValidator.setUriResolver(resolver)¶

Parameters:	resolver – `PySide.QtXmlPatterns.QAbstractUriResolver`

Sets the URI resolver to resolver . PySide.QtXmlPatterns.QXmlSchemaValidator does not take ownership of resolver .

PySide.QtXmlPatterns.QXmlSchemaValidator.uriResolver()¶

Return type:	`PySide.QtXmlPatterns.QAbstractUriResolver`

Returns the schema’s URI resolver. If no URI resolver has been set, QtXmlPatterns will use the URIs in instance documents as they are.

The URI resolver provides a level of abstraction, or polymorphic URIs . A resolver can rewrite logical URIs to physical ones, or it can translate obsolete or invalid URIs to valid ones.

When QtXmlPatterns calls QAbstractUriResolver.resolve() the absolute URI is the URI mandated by the schema specification, and the relative URI is the URI specified by the user.

PySide.QtXmlPatterns.QXmlSchemaValidator.validate(source[, documentUri=QUrl()])¶

Parameters:	source – `PySide.QtCore.QIODevice` documentUri – `PySide.QtCore.QUrl`
Return type:	`PySide.QtCore.bool`

Validates the XML instance document read from source with the given documentUri against the schema.

Returns true if the XML instance document is valid according to the schema, false otherwise.

Example:

schema = getSchema()

file = QFile("test.xml")
file.open(QIODevice.ReadOnly)

validator = QXmlSchemaValidator(schema)
if validator.validate(file, QUrl.fromLocalFile(file.fileName())):
    print "instance document is valid"
else:
    print "instance document is invalid"

PySide.QtXmlPatterns.QXmlSchemaValidator.validate(data[, documentUri=QUrl()])

Parameters:	data – `PySide.QtCore.QByteArray` documentUri – `PySide.QtCore.QUrl`
Return type:	`PySide.QtCore.bool`

Validates the XML instance document read from data with the given documentUri against the schema.

Returns true if the XML instance document is valid according to the schema, false otherwise.

Example:

schema = getSchema()

data = QByteArray("<?xml version=\"1.0\" encoding=\"UTF-8\"?><test></test>")

buffer = QBuffer(data)
buffer.open(QIODevice.ReadOnly)

QXmlSchemaValidator validator(schema)
if validator.validate(buffer):
    print "instance document is valid"
else:
    print "instance document is invalid"

PySide.QtXmlPatterns.QXmlSchemaValidator.validate(source)

Parameters:	source – `PySide.QtCore.QUrl`
Return type:	`PySide.QtCore.bool`

Validates the XML instance document read from source against the schema.

Returns true if the XML instance document is valid according to the schema, false otherwise.

Example:

schema = getSchema()

url = QUrl("http://www.schema-example.org/test.xml")

validator = QXmlSchemaValidator(schema)
if validator.validate(url):
    print "instance document is valid"
else:
    print "instance document is invalid"

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QXmlSchemaValidator¶

Synopsis¶

Functions¶

Detailed Description¶

XML Schema Version¶