Examples of javax.xml.stream.XMLOutputFactory

javax.xml.stream.XMLOutputFactory
Defines an abstract implementation of a factory for getting XMLEventWriters and XMLStreamWriters. The following table defines the standard properties of this specification. Each property varies in the level of support required by each implementation. The level of support required is described in the 'Required' column.

Configuration parameters

Property Name Behavior Return type Default Value Required

javax.xml.stream.isRepairingNamespaces defaults prefixes on the output side Boolean False Yes

The following paragraphs describe the namespace and prefix repair algorithm:

The property can be set with the following code line: setProperty("javax.xml.stream.isRepairingNamespaces",new Boolean(true|false));

This property specifies that the writer default namespace prefix declarations. The default value is false.

If a writer isRepairingNamespaces it will create a namespace declaration on the current StartElement for any attribute that does not currently have a namespace declaration in scope. If the StartElement has a uri but no prefix specified a prefix will be assigned, if the prefix has not been declared in a parent of the current StartElement it will be declared on the current StartElement. If the defaultNamespace is bound and in scope and the default namespace matches the URI of the attribute or StartElement QName no prefix will be assigned.

If an element or attribute name has a prefix, but is not bound to any namespace URI, then the prefix will be removed during serialization.

If element and/or attribute names in the same start or empty-element tag are bound to different namespace URIs and are using the same prefix then the element or the first occurring attribute retains the original prefix and the following attributes have their prefixes replaced with a new prefix that is bound to the namespace URIs of those attributes.

If an element or attribute name uses a prefix that is bound to a different URI than that inherited from the namespace context of the parent of that element and there is no namespace declaration in the context of the current element then such a namespace declaration is added.

If an element or attribute name is bound to a prefix and there is a namespace declaration that binds that prefix to a different URI then that namespace declaration is either removed if the correct mapping is inherited from the parent context of that element, or changed to the namespace URI of the element or attribute using that prefix.
@version 1.0 @author Copyright (c) 2003 by BEA Systems. All Rights Reserved. @see XMLInputFactory @see XMLEventWriter @see XMLStreamWriter

Configuration parameters
Property Name	Behavior	Return type	Default Value	Required
javax.xml.stream.isRepairingNamespaces	defaults prefixes on the output side	Boolean	False	Yes

        return createXMLStreamWriter(null, out);
    }
    
    public static XMLStreamWriter createXMLStreamWriter(StAXWriterConfiguration configuration,
            final OutputStream out) throws XMLStreamException {
        final XMLOutputFactory outputFactory = getXMLOutputFactory(configuration);
        try {
            XMLStreamWriter writer = 
                (XMLStreamWriter)
                AccessController.doPrivileged(new PrivilegedExceptionAction() {
                    public Object run() throws XMLStreamException {
                        return outputFactory.createXMLStreamWriter(out, OMConstants.DEFAULT_CHAR_SET_ENCODING);
                    }
                }
                );
                
            if (log.isDebugEnabled()) {

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        return createXMLStreamWriter(null, out, encoding);
    }
    
    public static XMLStreamWriter createXMLStreamWriter(StAXWriterConfiguration configuration,
            final OutputStream out, final String encoding) throws XMLStreamException {
        final XMLOutputFactory outputFactory = getXMLOutputFactory(configuration);
        try {
            XMLStreamWriter writer = 
                (XMLStreamWriter)
                AccessController.doPrivileged(new PrivilegedExceptionAction() {
                    public Object run() throws XMLStreamException {
                        return outputFactory.createXMLStreamWriter(out, encoding);
                    }
                }
                );
            
            if (log.isDebugEnabled()) {

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        return createXMLStreamWriter(null, out);
    }
    
    public static XMLStreamWriter createXMLStreamWriter(StAXWriterConfiguration configuration,
            final Writer out) throws XMLStreamException {
        final XMLOutputFactory outputFactory = getXMLOutputFactory(configuration);
        try {
            XMLStreamWriter writer = 
                (XMLStreamWriter)
                AccessController.doPrivileged(new PrivilegedExceptionAction() {
                    public Object run() throws XMLStreamException {
                        return outputFactory.createXMLStreamWriter(out);
                    }
                }
                );
            if (log.isDebugEnabled()) {
                log.debug("XMLStreamWriter is " + writer.getClass().getName());

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                } else {
                    savedClassLoader = Thread.currentThread().getContextClassLoader();
                    Thread.currentThread().setContextClassLoader(classLoader);
                }
                try {
                    XMLOutputFactory factory = XMLOutputFactory.newInstance();
                    factory.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES, 
                                        Boolean.FALSE);
                    Map props = loadFactoryProperties("XMLOutputFactory.properties");
                    if (props != null) {
                        for (Iterator it = props.entrySet().iterator(); it.hasNext(); ) {
                            Map.Entry entry = (Map.Entry)it.next();
                            factory.setProperty((String)entry.getKey(), entry.getValue());
                        }
                    }
                    StAXDialect dialect = StAXDialectDetector.getDialect(factory.getClass());
                    if (configuration != null) {
                        factory = configuration.configure(factory, dialect);
                    }
                    return new ImmutableXMLOutputFactory(dialect.normalize(
                            dialect.makeThreadSafe(factory)));

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    /**
     * @return XMLOutputFactory for the current classloader
     */
    private static XMLOutputFactory getXMLOutputFactory_perClassLoader(StAXWriterConfiguration configuration) {
        ClassLoader cl = getContextClassLoader();
        XMLOutputFactory factory;
        if (cl == null) {
            factory = getXMLOutputFactory_singleton(configuration);
        } else {
            if (configuration == null) {
                configuration = StAXWriterConfiguration.DEFAULT;
            }
            Map map = (Map)outputFactoryPerCLMap.get(configuration);
            if (map == null) {
                map = Collections.synchronizedMap(new WeakHashMap());
                outputFactoryPerCLMap.put(configuration, map);
                factory = null;
            } else {
                factory = (XMLOutputFactory)map.get(cl);
            }
            
            if (factory == null) {
                if (log.isDebugEnabled()) {
                    log.debug("About to create XMLOutputFactory implementation with " +
                                "classloader=" + cl);
                    log.debug("The classloader for javax.xml.stream.XMLOutputFactory is: " + 
                              XMLOutputFactory.class.getClassLoader());
                }
                try {
                    factory = newXMLOutputFactory(null, configuration);
                } catch (ClassCastException cce) {
                    if (log.isDebugEnabled()) {
                        log.debug("Failed creation of XMLOutputFactory implementation with " +
                                        "classloader=" + cl);
                        log.debug("Exception is=" + cce);
                        log.debug("Attempting with classloader: " + 
                                  XMLOutputFactory.class.getClassLoader());
                    }
                    factory = newXMLOutputFactory(XMLOutputFactory.class.getClassLoader(),
                            configuration);
                }
                if (factory != null) {
                    map.put(cl, factory);
                    if (log.isDebugEnabled()) {
                        log.debug("Created XMLOutputFactory = " + factory.getClass() 
                                  + " for classloader=" + cl);
                        log.debug("Configuration = " + configuration);
                        log.debug("Size of XMLOutFactory map for this configuration = " + map.size());
                        log.debug("Configurations for which factories have been cached = " +
                                outputFactoryPerCLMap.keySet());

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     */
    private static XMLOutputFactory getXMLOutputFactory_singleton(StAXWriterConfiguration configuration) {
        if (configuration == null) {
            configuration = StAXWriterConfiguration.DEFAULT;
        }
        XMLOutputFactory f = (XMLOutputFactory)outputFactoryMap.get(configuration);
        if (f == null) {
            f = newXMLOutputFactory(StAXUtils.class.getClassLoader(), configuration);
            outputFactoryMap.put(configuration, f);
            if (log.isDebugEnabled()) {
                if (f != null) {
                    log.debug("Created singleton XMLOutputFactory " + f.getClass() + " with configuration " + configuration);
                }
            }
        }
        return f;
    }

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    public TestCreateXMLStreamWriterThreadSafety(StAXImplementation staxImpl) {
        super(staxImpl);
    }


    protected void runTest() throws Throwable {
        final XMLOutputFactory factory = staxImpl.getDialect().makeThreadSafe(staxImpl.newNormalizedXMLOutputFactory());
        ConcurrentTestUtils.testThreadSafety(new Action() {
            public void execute() throws Exception {
                String text = String.valueOf((int)(Math.random() * 10000));
                StringWriter out = new StringWriter();
                XMLStreamWriter writer = factory.createXMLStreamWriter(out);
                writer.writeStartElement("root");
                writer.writeCharacters(text);
                writer.writeEndElement();
                writer.writeEndDocument();
                writer.flush();

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    public TestCreateXMLEventWriterWithNullEncoding(StAXImplementation staxImpl) {
        super(staxImpl);
    }


    protected void runTest() throws Throwable {
        XMLOutputFactory factory = staxImpl.newNormalizedXMLOutputFactory();
        // This should cause an exception
        try {
            factory.createXMLEventWriter(System.out, null);
        } catch (Throwable ex) {
            // Expected
            return;
        }
        // Attention here: since the fail method works by throwing an exception and we

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        return dialect.normalize(factory);
    }


    public XMLOutputFactory newXMLOutputFactory() {
        String className = props == null ? null : props.getProperty(XMLOutputFactory.class.getName());
        XMLOutputFactory factory;
        if (className == null) {
            ClassLoader savedClassLoader = Thread.currentThread().getContextClassLoader();
            Thread.currentThread().setContextClassLoader(classLoader);
            try {
                factory = XMLOutputFactory.newInstance();
            } finally {
                Thread.currentThread().setContextClassLoader(savedClassLoader);
            }
        } else {
            try {
                factory = (XMLOutputFactory)classLoader.loadClass(className).newInstance();
            } catch (Exception ex) {
                throw new FactoryConfigurationError(ex);
            }
        }
        if (classLoader != ClassLoader.getSystemClassLoader()
                && factory.getClass().getClassLoader() != classLoader) {
            throw new FactoryConfigurationError("Wrong factory: got " + factory.getClass().getName()
                    + " loaded from " + factory.getClass().getClassLoader());
        }
        return factory;
    }

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        }
        return factory;
    }
    
    public XMLOutputFactory newNormalizedXMLOutputFactory() {
        XMLOutputFactory factory = newXMLOutputFactory();
        if (dialect == null) {
            dialect = StAXDialectDetector.getDialect(factory.getClass());
        }
        return dialect.normalize(factory);
    }

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