TransformerFactory

public abstract class TransformerFactory extends Object

Known Direct Subclasses SAXTransformerFactory SAXTransformerFactory This class extends TransformerFactory to provide SAX-specific factory methods.

A TransformerFactory instance can be used to create Transformer and Templates objects.

The system property that determines which Factory implementation to create is named "javax.xml.transform.TransformerFactory". This property names a concrete subclass of the TransformerFactory abstract class. If the property is not defined, a platform default is be used.

Protected Constructor Summary

TransformerFactory() Default constructor is protected on purpose.

Public Method Summary

abstract Source	getAssociatedStylesheet(Source source, String media, String title, String charset) Get the stylesheet specification(s) associated with the XML Source document via the xml-stylesheet processing instruction that match the given criteria.
abstract Object	getAttribute(String name) Allows the user to retrieve specific attributes on the underlying implementation.
abstract ErrorListener	getErrorListener() Get the error event handler for the TransformerFactory.
abstract boolean	getFeature(String name) Look up the value of a feature.
abstract URIResolver	getURIResolver() Get the object that is used by default during the transformation to resolve URIs used in document(), xsl:import, or xsl:include.
static TransformerFactory	newInstance(String factoryClassName, ClassLoader classLoader) Returns an instance of the named implementation of TransformerFactory.
static TransformerFactory	newInstance() Returns Android's implementation of TransformerFactory.
abstract Templates	newTemplates(Source source) Process the Source into a Templates object, which is a a compiled representation of the source.
abstract Transformer	newTransformer(Source source) Process the Source into a Transformer Object.
abstract Transformer	newTransformer() Create a new Transformer that performs a copy of the Source to the Result.
abstract void	setAttribute(String name, Object value) Allows the user to set specific attributes on the underlying implementation.
abstract void	setErrorListener(ErrorListener listener) Set the error event listener for the TransformerFactory, which is used for the processing of transformation instructions, and not for the transformation itself.
abstract void	setFeature(String name, boolean value) Set a feature for this TransformerFactory and Transformers or Templates created by this factory.
abstract void	setURIResolver(URIResolver resolver) Set an object that is used by default during the transformation to resolve URIs used in document(), xsl:import, or xsl:include.

Inherited Method Summary

From class java.lang.Object

Object	clone() Creates and returns a copy of this Object.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of Class that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.

Protected Constructors

protected TransformerFactory ()

Default constructor is protected on purpose.

Public Methods

public abstract Source getAssociatedStylesheet (Source source, String media, String title, String charset)

Get the stylesheet specification(s) associated with the XML Source document via the xml-stylesheet processing instruction that match the given criteria. Note that it is possible to return several stylesheets, in which case they are applied as if they were a list of imports or cascades in a single stylesheet.

Parameters

source	The XML source document.
media	The media attribute to be matched. May be null, in which case the preferred templates will be used (i.e. alternate = no).
title	The value of the title attribute to match. May be null.
charset	The value of the charset attribute to match. May be null.

Returns

• A Source Object suitable for passing to the TransformerFactory.

Throws

TransformerConfigurationException	An Exception is thrown if an error occurs during parsing of the source.

See Also

• Associating Style Sheets with XML documents Version 1.0

public abstract Object getAttribute (String name)

Allows the user to retrieve specific attributes on the underlying implementation. An IllegalArgumentException is thrown if the underlying implementation doesn't recognize the attribute.

Parameters

name	The name of the attribute.

Returns

• value The value of the attribute.

public abstract ErrorListener getErrorListener ()

Get the error event handler for the TransformerFactory.

Returns

• The current error handler, which should never be null.

public abstract boolean getFeature (String name)

Look up the value of a feature.

Feature names are fully qualified URIs. Implementations may define their own features. false is returned if this TransformerFactory or the Transformers or Templates it creates cannot support the feature. It is possible for an TransformerFactory to expose a feature value but be unable to change its state.

Parameters

name	Feature name.

Returns

• The current state of the feature, true or false.

Throws

NullPointerException	If the name parameter is null.

public abstract URIResolver getURIResolver ()

Get the object that is used by default during the transformation to resolve URIs used in document(), xsl:import, or xsl:include.

Returns

• The URIResolver that was set with setURIResolver.

public static TransformerFactory newInstance (String factoryClassName, ClassLoader classLoader)

Returns an instance of the named implementation of TransformerFactory.

Parameters

factoryClassName
classLoader

Throws

TransformerFactoryConfigurationError	if factoryClassName is not available or cannot be instantiated.

public static TransformerFactory newInstance ()

Returns Android's implementation of TransformerFactory. Unlike other Java implementations, this method does not consult system properties, properties files, or the services API.

Throws

TransformerFactoryConfigurationError	never. Included for API compatibility with other Java implementations.

public abstract Templates newTemplates (Source source)

Process the Source into a Templates object, which is a a compiled representation of the source. This Templates object may then be used concurrently across multiple threads. Creating a Templates object allows the TransformerFactory to do detailed performance optimization of transformation instructions, without penalizing runtime transformation.

Parameters

source	An object that holds a URL, input stream, etc.

Returns

• A Templates object capable of being used for transformation purposes, never null.

Throws

TransformerConfigurationException	May throw this during the parse when it is constructing the Templates object and fails.

public abstract Transformer newTransformer (Source source)

Process the Source into a Transformer Object. The Source is an XSLT document that conforms to XSL Transformations (XSLT) Version 1.0. Care must be taken not to use this Transformer in multiple Threads running concurrently. Different TransformerFactories can be used concurrently by different Threads.

Parameters

source	Source of XSLT document used to create Transformer. Examples of XML Sources include StreamSource, SAXSource and DOMSource.

Returns

• A Transformer object that may be used to perform a transformation in a single Thread, never null.

Throws

TransformerConfigurationException	Thrown if there are errors when parsing the Source or it is not possible to create a Transformer instance.

See Also

• XSL Transformations (XSLT) Version 1.0

public abstract Transformer newTransformer ()

Create a new Transformer that performs a copy of the Source to the Result. i.e. the "identity transform".

Returns

• A Transformer object that may be used to perform a transformation in a single thread, never null.

Throws

TransformerConfigurationException	Thrown if it is not possible to create a Transformer instance.

public abstract void setAttribute (String name, Object value)

Allows the user to set specific attributes on the underlying implementation. An attribute in this context is defined to be an option that the implementation provides. An IllegalArgumentException is thrown if the underlying implementation doesn't recognize the attribute.

Parameters

name	The name of the attribute.
value	The value of the attribute.

public abstract void setErrorListener (ErrorListener listener)

Set the error event listener for the TransformerFactory, which is used for the processing of transformation instructions, and not for the transformation itself. An IllegalArgumentException is thrown if the ErrorListener listener is null.

Parameters

listener	The new error listener.

public abstract void setFeature (String name, boolean value)

Set a feature for this TransformerFactory and Transformers or Templates created by this factory.

Feature names are fully qualified URIs. Implementations may define their own features. An TransformerConfigurationException is thrown if this TransformerFactory or the Transformers or Templates it creates cannot support the feature. It is possible for an TransformerFactory to expose a feature value but be unable to change its state.

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

• true: the implementation will limit XML processing to conform to implementation limits and behave in a secure fashion as defined by the implementation. Examples include resolving user defined style sheets and functions. If XML processing is limited for security reasons, it will be reported via a call to the registered ErrorListener.fatalError(TransformerException). See setErrorListener(ErrorListener).
• false: the implementation will processing XML according to the XML specifications without regard to possible implementation limits.

Parameters

name	Feature name.
value	Is feature state true or false.

Throws

TransformerConfigurationException	if this TransformerFactory or the Transformers or Templates it creates cannot support this feature.
NullPointerException	If the name parameter is null.

public abstract void setURIResolver (URIResolver resolver)

Set an object that is used by default during the transformation to resolve URIs used in document(), xsl:import, or xsl:include.

Parameters

resolver	An object that implements the URIResolver interface, or null.