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javax.xml.transform

public abstract Class TransformerFactory

extends Object
Class Inheritance
Known Direct Subclasses
javax.xml.transform.sax.SAXTransformerFactory
Imports
com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl

A TransformerFactory instance can be used to create javax.xml.transform.Transformer and 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.

Authors
Jeff Suttor, Neeraj Bajaj
Since
1.5

Constructor Summary

AccessConstructor and Description
protected
TransformerFactory()

Default constructor is protected on purpose.

Method Summary

Modifier and TypeMethod and Description
public abstract Source

Returns:

A Source Object suitable for passing to the TransformerFactory.
getAssociatedStylesheet
(Source
The XML source document.
source
,
String
The media attribute to be matched. May be null, in which case the preferred templates will be used (i.e. alternate = no).
media
,
String
The value of the title attribute to match. May be null.
title
,
String
The value of the charset attribute to match. May be null.
charset
)

Get the stylesheet specification(s) associated with the XML Source document via the xml-stylesheet processing instruction that match the given criteria.

public abstract Object

Returns:

value The value of the attribute.
getAttribute
(String
The name of the attribute.
name
)

Allows the user to retrieve specific attributes on the underlying implementation.

public abstract ErrorListener

Returns:

The current error handler, which should never be null.
getErrorListener
()

Get the error event handler for the TransformerFactory.

public abstract boolean

Returns:

The current state of the feature, true or false.
getFeature
(String
Feature name.
name
)

Look up the value of a feature.

public abstract URIResolver

Returns:

The URIResolver that was set with setURIResolver.
getURIResolver
()

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

public static TransformerFactory

Returns:

A new instance of the TransformerFactory builtin system-default implementation.
newDefaultInstance
()

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

public static TransformerFactory

Returns:

new TransformerFactory instance, never null.
newInstance
()

Obtains a new instance of a TransformerFactory.

public static TransformerFactory

Returns:

new TransformerFactory instance, never null.
newInstance
(String
fully qualified factory class name that provides implementation of javax.xml.transform.TransformerFactory.
factoryClassName
,
ClassLoader
ClassLoader used to load the factory class. If null current Thread's context classLoader is used to load the factory class.
classLoader
)

Obtain a new instance of a TransformerFactory from factory class name.

public abstract Templates

Returns:

A Templates object capable of being used for transformation purposes, never null.
newTemplates
(Source
An object that holds a URL, input stream, etc.
source
)

Process the Source into a Templates object, which is a a compiled representation of the source.

public abstract Transformer

Returns:

A Transformer object that may be used to perform a transformation in a single Thread, never null.
newTransformer
(Source
Source of XSLT document used to create Transformer. Examples of XML Sources include DOMSource, SAXSource, and StreamSource.
source
)

Process the Source into a Transformer Object.

public abstract Transformer

Returns:

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

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

public abstract void
setAttribute(String
The name of the attribute.
name
,
Object
The value of the attribute.
value
)

Allows the user to set specific attributes on the underlying implementation.

public abstract void
setErrorListener(ErrorListener
The new error listener.
listener
)

Set the error event listener for the TransformerFactory, which is used for the processing of transformation instructions, and not for the transformation itself.

public abstract void
setFeature(String
Feature name.
name
,
boolean
Is feature state true or false.
value
)

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

public abstract void
setURIResolver(URIResolver
An object that implements the URIResolver interface, or null.
resolver
)

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

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Constructor Detail

TransformerFactoryback to summary
protected TransformerFactory()

Default constructor is protected on purpose.

Method Detail

getAssociatedStylesheetback to summary
public abstract Source getAssociatedStylesheet(Source source, String media, String title, String charset) throws TransformerConfigurationException

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:Source

The XML source document.

media:String

The media attribute to be matched. May be null, in which case the preferred templates will be used (i.e. alternate = no).

title:String

The value of the title attribute to match. May be null.

charset:String

The value of the charset attribute to match. May be null.

Returns:Source

A Source Object suitable for passing to the TransformerFactory.

Exceptions
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
getAttributeback to summary
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:String

The name of the attribute.

Returns:Object

value The value of the attribute.

Exceptions
IllegalArgumentException:
When implementation does not recognize the attribute.
getErrorListenerback to summary
public abstract ErrorListener getErrorListener()

Get the error event handler for the TransformerFactory.

Returns:ErrorListener

The current error handler, which should never be null.

getFeatureback to summary
public abstract boolean getFeature(String name)

Look up the value of a feature.

Feature names are fully qualified java.net.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:String

Feature name.

Returns:boolean

The current state of the feature, true or false.

Exceptions
NullPointerException:
If the name parameter is null.
getURIResolverback to summary
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:URIResolver

The URIResolver that was set with setURIResolver.

newDefaultInstanceback to summary
public static TransformerFactory newDefaultInstance()

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

Returns:TransformerFactory

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

Since
9
newInstanceback to summary
public static TransformerFactory newInstance() throws TransformerFactoryConfigurationError

Obtains a new instance of a TransformerFactory. This method uses the JAXP Lookup Mechanism 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 transformer instances.

Returns:TransformerFactory

new TransformerFactory instance, never null.

Exceptions
TransformerFactoryConfigurationError:
Thrown in case of service configuration error or if the implementation is not available or cannot be instantiated.
newInstanceback to summary
public static TransformerFactory newInstance(String factoryClassName, ClassLoader classLoader) throws TransformerFactoryConfigurationError

Obtain a new instance of a TransformerFactory from factory class name. This function is useful when there are multiple providers in the classpath. It gives more control to the application as it can specify which provider should be loaded.

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

Tip for Trouble-shooting

Setting the jaxp.debug system property will cause this method to print a lot of debug messages to System.err about what it is doing and where it is looking at.

If you have problems try:

java -Djaxp.debug=1 YourProgram ....
Parameters
factoryClassName:String

fully qualified factory class name that provides implementation of javax.xml.transform.TransformerFactory.

classLoader:ClassLoader

ClassLoader used to load the factory class. If null current Thread's context classLoader is used to load the factory class.

Returns:TransformerFactory

new TransformerFactory instance, never null.

Exceptions
TransformerFactoryConfigurationError:
if factoryClassName is null, or the factory class cannot be loaded, instantiated.
Since
1.6
See Also
newInstance()
newTemplatesback to summary
public abstract Templates newTemplates(Source source) throws TransformerConfigurationException

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:Source

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

Returns:Templates

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

Exceptions
TransformerConfigurationException:
When parsing to construct the Templates object fails.
newTransformerback to summary
public abstract Transformer newTransformer(Source source) throws TransformerConfigurationException

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

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

Returns:Transformer

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

Exceptions
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
newTransformerback to summary
public abstract Transformer newTransformer() throws TransformerConfigurationException

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

Returns:Transformer

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

Exceptions
TransformerConfigurationException:
When it is not possible to create a Transformer instance.
setAttributeback to summary
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.

All implementations that implement JAXP 1.5 or newer are required to support the javax.xml.XMLConstants#ACCESS_EXTERNAL_DTD and javax.xml.XMLConstants#ACCESS_EXTERNAL_STYLESHEET properties.

Parameters
name:String

The name of the attribute.

value:Object

The value of the attribute.

Exceptions
IllegalArgumentException:
When implementation does not recognize the attribute.
setErrorListenerback to summary
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:ErrorListener

The new error listener.

Exceptions
IllegalArgumentException:
When listener is null
setFeatureback to summary
public abstract void setFeature(String name, boolean value) throws TransformerConfigurationException

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

Feature names are fully qualified java.net.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 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 ErrorListener#fatalError(TransformerException exception). See setErrorListener(ErrorListener listener).
  • false: the implementation will processing XML according to the XML specifications without regard to possible implementation limits.
Parameters
name:String

Feature name.

value:boolean

Is feature state true or false.

Exceptions
TransformerConfigurationException:
if this TransformerFactory or the Transformers or Templates it creates cannot support this feature.
NullPointerException:
If the name parameter is null.
setURIResolverback to summary
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:URIResolver

An object that implements the URIResolver interface, or null.