javax.xml.transform

Class TransformerFactory

public abstract class TransformerFactory extends Object

A TransformerFactory instance can be used to create {@link javax.xml.transform.Transformer} and {@link javax.xml.transform.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.

Author: Jeff Suttor

Constructor Summary
protected TransformerFactory()
Default constructor is protected on purpose.
Method Summary
abstract SourcegetAssociatedStylesheet(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 ObjectgetAttribute(String name)
Allows the user to retrieve specific attributes on the underlying implementation.
abstract ErrorListenergetErrorListener()
Get the error event handler for the TransformerFactory.
abstract booleangetFeature(String name)
Look up the value of a feature.
abstract URIResolvergetURIResolver()
Get the object that is used by default during the transformation to resolve URIs used in document(), xsl:import, or xsl:include.
static TransformerFactorynewInstance()
Obtain a new instance of a TransformerFactory.
abstract TemplatesnewTemplates(Source source)
Process the Source into a Templates object, which is a a compiled representation of the source.
abstract TransformernewTransformer(Source source)

Process the Source into a Transformer Object.

abstract TransformernewTransformer()

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

abstract voidsetAttribute(String name, Object value)
Allows the user to set specific attributes on the underlying implementation.
abstract voidsetErrorListener(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 voidsetFeature(String name, boolean value)

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

Feature names are fully qualified {@link java.net.URI}s.

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

Constructor Detail

TransformerFactory

protected TransformerFactory()
Default constructor is protected on purpose.

Method Detail

getAssociatedStylesheet

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 prefered 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 occurings during parsing of the source.

See Also: Associating Style Sheets with XML documents Version 1.0

getAttribute

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.

getErrorListener

public abstract ErrorListener getErrorListener()
Get the error event handler for the TransformerFactory.

Returns: The current error handler, which should never be null.

getFeature

public abstract boolean getFeature(String name)
Look up the value of a feature.

Feature names are fully qualified {@link java.net.URI}s. 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.

getURIResolver

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.

newInstance

public static TransformerFactory newInstance()
Obtain a new instance of a TransformerFactory. This static method creates a new factory instance This method uses the following ordered lookup procedure to determine the TransformerFactory implementation class to load: Once an application has obtained a reference to a TransformerFactory it can use the factory to configure and obtain parser instances.

Returns: new TransformerFactory instance, never null.

Throws: TransformerFactoryConfigurationError Thrown if the implementation is not available or cannot be instantiated.

newTemplates

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.

newTransformer

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 {@link javax.xml.transform.dom.DOMSource DOMSource}, {@link javax.xml.transform.sax.SAXSource SAXSource}, and {@link javax.xml.transform.stream.StreamSource StreamSource}.

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

newTransformer

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.

setAttribute

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.

setErrorListener

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.

setFeature

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 {@link java.net.URI}s. Implementations may define their own features. An {@link 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 {@link javax.xml.XMLConstants#FEATURE_SECURE_PROCESSING} feature. When the feature is:

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.

setURIResolver

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.