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TransformerFactory


javax.xml.transform

Class TransformerFactory

  • Direct Known Subclasses:
    SAXTransformerFactory


    public abstract class TransformerFactory
    extends Object

    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.

    • Constructor Detail

      • TransformerFactory

        protected TransformerFactory()
        Default constructor is protected on purpose.
    • Method Detail

      • newTransformer

        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:
        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.
      • newTemplates

        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 - 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.
      • getAssociatedStylesheet

        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 - 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
      • 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.
      • 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.
      • setFeature

        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 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 exception). See 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.
      • getFeature

        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.
      • 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.
      • 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.
      • 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.
      • getErrorListener

        public abstract ErrorListener getErrorListener()
        Get the error event handler for the TransformerFactory.
        Returns:
        The current error handler, which should never be null.


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