Module java.xml

Package javax.xml.stream

Class XMLOutputFactory

java.lang.Object

javax.xml.stream.XMLOutputFactory

public abstract class XMLOutputFactory
extends Object

Defines an abstract implementation of a factory for getting XMLEventWriters and XMLStreamWriters. The following table defines the standard properties of this specification. Each property varies in the level of support required by each implementation. The level of support required is described in the 'Required' column.

Configuration Parameters

Property Name	Behavior	Return type	Default Value	Required
javax.xml.stream.isRepairingNamespaces	defaults prefixes on the output side	Boolean	False	Yes

The following paragraphs describe the namespace and prefix repair algorithm:

The property can be set with the following code line: setProperty("javax.xml.stream.isRepairingNamespaces", new Boolean(true|false));

This property specifies that the writer default namespace prefix declarations. The default value is false.

If a writer isRepairingNamespaces it will create a namespace declaration on the current StartElement for any attribute that does not currently have a namespace declaration in scope. If the StartElement has a uri but no prefix specified a prefix will be assigned, if the prefix has not been declared in a parent of the current StartElement it will be declared on the current StartElement. If the defaultNamespace is bound and in scope and the default namespace matches the URI of the attribute or StartElement QName no prefix will be assigned.

If an element or attribute name has a prefix, but is not bound to any namespace URI, then the prefix will be removed during serialization.

If element and/or attribute names in the same start or empty-element tag are bound to different namespace URIs and are using the same prefix then the element or the first occurring attribute retains the original prefix and the following attributes have their prefixes replaced with a new prefix that is bound to the namespace URIs of those attributes.

If an element or attribute name uses a prefix that is bound to a different URI than that inherited from the namespace context of the parent of that element and there is no namespace declaration in the context of the current element then such a namespace declaration is added.

If an element or attribute name is bound to a prefix and there is a namespace declaration that binds that prefix to a different URI then that namespace declaration is either removed if the correct mapping is inherited from the parent context of that element, or changed to the namespace URI of the element or attribute using that prefix.

Since:

1.6

See Also:

XMLInputFactory, XMLEventWriter, XMLStreamWriter

Field Summary

Fields

Modifier and Type	Field	Description
static String	IS_REPAIRING_NAMESPACES	Property used to set prefix defaulting on the output side

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	XMLOutputFactory()	Protected constructor to prevent instantiation.

Method Summary

Modifier and Type	Method	Description
abstract XMLEventWriter	createXMLEventWriter(OutputStream stream)	Create a new XMLEventWriter that writes to a stream
abstract XMLEventWriter	createXMLEventWriter(OutputStream stream, String encoding)	Create a new XMLEventWriter that writes to a stream
abstract XMLEventWriter	createXMLEventWriter(Writer stream)	Create a new XMLEventWriter that writes to a writer
abstract XMLEventWriter	createXMLEventWriter(Result result)	Create a new XMLEventWriter that writes to a JAXP result.
abstract XMLStreamWriter	createXMLStreamWriter(OutputStream stream)	Create a new XMLStreamWriter that writes to a stream
abstract XMLStreamWriter	createXMLStreamWriter(OutputStream stream, String encoding)	Create a new XMLStreamWriter that writes to a stream
abstract XMLStreamWriter	createXMLStreamWriter(Writer stream)	Create a new XMLStreamWriter that writes to a writer
abstract XMLStreamWriter	createXMLStreamWriter(Result result)	Create a new XMLStreamWriter that writes to a JAXP result.
abstract Object	getProperty(String name)	Get a feature/property on the underlying implementation
abstract boolean	isPropertySupported(String name)	Query the set of properties that this factory supports.
static XMLOutputFactory	newDefaultFactory()	Creates a new instance of the XMLOutputFactory builtin system-default implementation.
static XMLOutputFactory	newFactory()	Create a new instance of the factory.
static XMLOutputFactory	newFactory(String factoryId, ClassLoader classLoader)	Create a new instance of the factory.
static XMLOutputFactory	newInstance()	Creates a new instance of the factory in exactly the same manner as the newFactory() method.
static XMLInputFactory	newInstance(String factoryId, ClassLoader classLoader)	Deprecated. This method has been deprecated because it returns an instance of XMLInputFactory, which is of the wrong class.
abstract void	setProperty(String name, Object value)	Allows the user to set specific features/properties on the underlying implementation.

Methods declared in class java.lang.Object

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

Field Details

IS_REPAIRING_NAMESPACES

public static final String IS_REPAIRING_NAMESPACES

Property used to set prefix defaulting on the output side

See Also:

Constant Field Values

Constructor Details

XMLOutputFactory

protected XMLOutputFactory()

Protected constructor to prevent instantiation. Use newFactory() instead.

Method Details

newDefaultFactory

public static XMLOutputFactory newDefaultFactory()

Creates a new instance of the XMLOutputFactory builtin system-default implementation.

Returns:

A new instance of the XMLOutputFactory builtin system-default implementation.

Since:

9

newInstance

public static XMLOutputFactory newInstance()
                                    throws FactoryConfigurationError

Creates a new instance of the factory in exactly the same manner as the newFactory() method.

Returns:

an instance of the XMLOutputFactory

Throws:

FactoryConfigurationError - if an instance of this factory cannot be loaded

newFactory

public static XMLOutputFactory newFactory()
                                   throws FactoryConfigurationError

Create a new instance of the factory.

This static method creates a new factory instance. This method uses the following ordered lookup procedure to determine the XMLOutputFactory implementation class to load:

• Use the javax.xml.stream.XMLOutputFactory system property.

• Use the configuration file "stax.properties". The file is in standard Properties format and typically located in the conf directory of the Java installation. It contains the fully qualified name of the implementation class with the key being the system property defined above.

  The stax.properties file is read only once by the implementation and its values are then cached for future use. If the file does not exist when the first attempt is made to read from it, no further attempts are made to check for its existence. It is not possible to change the value of any property in stax.properties after it has been read for the first time.

  Use the jaxp configuration file "jaxp.properties". The file is in the same format as stax.properties and will only be read if stax.properties does not exist.

• Use the service-provider loading facility, defined by the ServiceLoader class, to attempt to locate and load an implementation of the service using the default loading mechanism: the service-provider loading facility will use the current thread's context class loader to attempt to load the service. If the context class loader is null, the system class loader will be used.

• Otherwise, the system-default implementation is returned.

Once an application has obtained a reference to a XMLOutputFactory it can use the factory to configure and obtain stream instances.

Returns:

an instance of the XMLOutputFactory

Throws:

FactoryConfigurationError - in case of service configuration error or if the implementation is not available or cannot be instantiated.

newInstance

@Deprecated(since="1.7")
public static XMLInputFactory newInstance(String factoryId,
 ClassLoader classLoader)
                                   throws FactoryConfigurationError

Deprecated.

This method has been deprecated because it returns an instance of XMLInputFactory, which is of the wrong class. Use the new method newFactory(java.lang.String, java.lang.ClassLoader) instead.

Create a new instance of the factory.

Parameters:

factoryId - Name of the factory to find, same as a property name

classLoader - classLoader to use

Returns:

the factory implementation

Throws:

FactoryConfigurationError - if an instance of this factory cannot be loaded

newFactory

public static XMLOutputFactory newFactory(String factoryId,
 ClassLoader classLoader)
                                   throws FactoryConfigurationError

Create a new instance of the factory. If the classLoader argument is null, then the ContextClassLoader is used.

This method uses the following ordered lookup procedure to determine the XMLOutputFactory implementation class to load:

• Use the value of the system property identified by factoryId.

• Use the configuration file "stax.properties". The file is in standard Properties format and typically located in the conf directory of the Java installation. It contains the fully qualified name of the implementation class with the key being the system property defined above.

  The stax.properties file is read only once by the implementation and its values are then cached for future use. If the file does not exist when the first attempt is made to read from it, no further attempts are made to check for its existence. It is not possible to change the value of any property in stax.properties after it has been read for the first time.

  Use the jaxp configuration file "jaxp.properties". The file is in the same format as stax.properties and will only be read if stax.properties does not exist.

• If factoryId is "javax.xml.stream.XMLOutputFactory", use the service-provider loading facility, defined by the ServiceLoader class, to attempt to locate and load an implementation of the service using the specified ClassLoader. If classLoader is null, the default loading mechanism will apply: That is, the service-provider loading facility will use the current thread's context class loader to attempt to load the service. If the context class loader is null, the system class loader will be used.

• Otherwise, throws a FactoryConfigurationError.

API Note:

The parameter factoryId defined here is inconsistent with that of other JAXP factories where the first parameter is fully qualified factory class name that provides implementation of the factory.

Note that this is a new method that replaces the deprecated newInstance(String factoryId, ClassLoader classLoader) method. The original method was incorrectly defined to return XMLInputFactory.

Parameters:

factoryId - Name of the factory to find, same as a property name

classLoader - classLoader to use

Returns:

the factory implementation

Throws:

FactoryConfigurationError - in case of service configuration error or if the implementation is not available or cannot be instantiated.

createXMLStreamWriter

public abstract XMLStreamWriter createXMLStreamWriter(Writer stream)
                                               throws XMLStreamException

Create a new XMLStreamWriter that writes to a writer

Parameters:

stream - the writer to write to

Returns:

instance of the XMLStreamWriter

Throws:

XMLStreamException - if an error occurs

createXMLStreamWriter

public abstract XMLStreamWriter createXMLStreamWriter(OutputStream stream)
                                               throws XMLStreamException

Create a new XMLStreamWriter that writes to a stream

Parameters:

stream - the stream to write to

Returns:

instance of the XMLStreamWriter

Throws:

XMLStreamException - if an error occurs

createXMLStreamWriter

public abstract XMLStreamWriter createXMLStreamWriter(OutputStream stream,
 String encoding)
                                               throws XMLStreamException

Create a new XMLStreamWriter that writes to a stream

Parameters:

stream - the stream to write to

encoding - the encoding to use

Returns:

instance of the XMLStreamWriter

Throws:

XMLStreamException - if an error occurs

createXMLStreamWriter

public abstract XMLStreamWriter createXMLStreamWriter(Result result)
                                               throws XMLStreamException

Create a new XMLStreamWriter that writes to a JAXP result. This method is optional.

Parameters:

result - the result to write to

Returns:

instance of the XMLStreamWriter

Throws:

UnsupportedOperationException - if this method is not supported by this XMLOutputFactory

XMLStreamException - if an error occurs

createXMLEventWriter

public abstract XMLEventWriter createXMLEventWriter(Result result)
                                             throws XMLStreamException

Create a new XMLEventWriter that writes to a JAXP result. This method is optional.

Parameters:

result - the result to write to

Returns:

instance of the XMLEventWriter

Throws:

UnsupportedOperationException - if this method is not supported by this XMLOutputFactory

XMLStreamException - if an error occurs

createXMLEventWriter

public abstract XMLEventWriter createXMLEventWriter(OutputStream stream)
                                             throws XMLStreamException

Create a new XMLEventWriter that writes to a stream

Parameters:

stream - the stream to write to

Returns:

instance of the XMLEventWriter

Throws:

XMLStreamException - if an error occurs

createXMLEventWriter

public abstract XMLEventWriter createXMLEventWriter(OutputStream stream,
 String encoding)
                                             throws XMLStreamException

Create a new XMLEventWriter that writes to a stream

Parameters:

stream - the stream to write to

encoding - the encoding to use

Returns:

instance of the XMLEventWriter

Throws:

XMLStreamException - if an error occurs

createXMLEventWriter

public abstract XMLEventWriter createXMLEventWriter(Writer stream)
                                             throws XMLStreamException

Create a new XMLEventWriter that writes to a writer

Parameters:

stream - the stream to write to

Returns:

instance of the XMLEventWriter

Throws:

XMLStreamException - if an error occurs

setProperty

public abstract void setProperty(String name,
 Object value)
                          throws IllegalArgumentException

Allows the user to set specific features/properties on the underlying implementation.

Parameters:

name - The name of the property

value - The value of the property

Throws:

IllegalArgumentException - if the property is not supported

getProperty

public abstract Object getProperty(String name)
                            throws IllegalArgumentException

Get a feature/property on the underlying implementation

Parameters:

name - The name of the property

Returns:

The value of the property

Throws:

IllegalArgumentException - if the property is not supported

isPropertySupported

public abstract boolean isPropertySupported(String name)

Query the set of properties that this factory supports.

Parameters:

name - The name of the property (may not be null)

Returns:

true if the property is supported and false otherwise