javax.xml.transform
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.
| Constructor Summary | |
|---|---|
| protected | TransformerFactory()
Default constructor is protected on purpose. |
| Method Summary | |
|---|---|
| abstract Source | getAssociatedStylesheet(Source source, String media, String title, String charset) Get the stylesheet specification(s) associated with the
XML |
| 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()
Obtain a new instance of a 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 |
| abstract Transformer | newTransformer() Create a new |
| 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 Feature names are fully qualified {@link java.net.URI}s. |
| 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.
|
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
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.
Returns: The current error handler, which should never be null.
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.
Returns: The URIResolver that was set with setURIResolver.
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:
javax.xml.transform.TransformerFactory system
property.
java.util.Properties
format and contains the fully qualified name of the
implementation class with the key being the system property defined
above.
The jaxp.properties file is read only once by the JAXP implementation
and it's 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 jaxp.properties after it has been read for the first time.
META-INF/services/javax.xml.transform.TransformerFactory
in jars available to the runtime.
TransformerFactory instance.
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.
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.
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
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.
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.
IllegalArgumentException is thrown if the
ErrorListener listener is null.
Parameters: listener The new error listener.
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:
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
{@link ErrorListener#fatalError(TransformerException exception)}.
See {@link #setErrorListener(ErrorListener listener)}.
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.
Parameters: resolver An object that implements the URIResolver interface, or null.