/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* Copyright (c) 2009, 2013, by Oracle Corporation. All Rights Reserved.
*/
package javax.xml.stream;
import com.sun.xml.internal.stream.XMLOutputFactoryImpl;
import javax.xml.transform.Result;
/**
* 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.
*
* <table border="2" rules="all" cellpadding="4">
* <thead>
* <tr>
* <th align="center" colspan="2">
* Configuration parameters
* </th>
* </tr>
* </thead>
* <tbody>
* <tr>
* <th>Property Name</th>
* <th>Behavior</th>
* <th>Return type</th>
* <th>Default Value</th>
* <th>Required</th>
* </tr>
* <tr><td>javax.xml.stream.isRepairingNamespaces</td><td>defaults prefixes
* on the output side</td><td>Boolean</td><td>False</td><td>Yes</td></tr>
* </tbody>
* </table>
*
* <p>The following paragraphs describe the namespace and prefix repair algorithm:
*
* <p>The property can be set with the following code line:
* {@code setProperty("javax.xml.stream.isRepairingNamespaces", new Boolean(true|false));}
*
* <p>This property specifies that the writer default namespace prefix declarations.
* The default value is false.
*
* <p>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.
*
* <p>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.
*
* <p>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.
*
* <p>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.
*
* <p>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 1.2
* @author Copyright (c) 2009, 2015 by Oracle Corporation. All Rights Reserved.
* @see XMLInputFactory
* @see XMLEventWriter
* @see XMLStreamWriter
* @since 1.6
*/
public abstract class XMLOutputFactory {
/**
* Property used to set prefix defaulting on the output side
*/
public static final String IS_REPAIRING_NAMESPACES=
"javax.xml.stream.isRepairingNamespaces";
static final String DEFAULIMPL = "com.sun.xml.internal.stream.XMLOutputFactoryImpl";
protected XMLOutputFactory(){}
/**
* Creates a new instance of the {@code XMLOutputFactory} builtin
* system-default implementation.
*
* @return A new instance of the {@code XMLOutputFactory} builtin
* system-default implementation.
*
* @since 9
*/
public static XMLOutputFactory newDefaultFactory() {
return new XMLOutputFactoryImpl();
}
/**
* Creates a new instance of the factory in exactly the same manner as the
* {@link #newFactory()} method.
* @throws FactoryConfigurationError if an instance of this factory cannot be loaded
*/
public static XMLOutputFactory newInstance()
throws FactoryConfigurationError
{
return FactoryFinder.find(XMLOutputFactory.class, DEFAULIMPL);
}
/**
* Create a new instance of the factory.
* <p>
* This static method creates a new factory instance. This method uses the
* following ordered lookup procedure to determine the XMLOutputFactory
* implementation class to load:
* <ul>
* <li>
* Use the javax.xml.stream.XMLOutputFactory system property.
* </li>
* <li>
* <p>
* Use the configuration file "stax.properties". The file is in standard
* {@link java.util.Properties} format and typically located in the
* {@code conf} directory of the Java installation. It contains the fully qualified
* name of the implementation class with the key being the system property
* defined above.
*
* <p>
* The stax.properties file is read only once by the implementation
* and its 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 stax.properties after it has been read for the first time.
*
* <p>
* Use the jaxp configuration file "jaxp.properties". The file is in the same
* format as stax.properties and will only be read if stax.properties does
* not exist.
* </li>
* <li>
* <p>
* Use the service-provider loading facility, defined by the
* {@link java.util.ServiceLoader} class, to attempt to locate and load an
* implementation of the service using the {@linkplain
* java.util.ServiceLoader#load(java.lang.Class) default loading mechanism}:
* the service-provider loading facility will use the {@linkplain
* java.lang.Thread#getContextClassLoader() current thread's context class loader}
* to attempt to load the service. If the context class
* loader is null, the {@linkplain
* ClassLoader#getSystemClassLoader() system class loader} will be used.
* </li>
* <li>
* <p>
* Otherwise, the {@linkplain #newDefaultFactory() system-default}
* implementation is returned.
* </li>
* </ul>
* <p>
* Once an application has obtained a reference to a XMLOutputFactory it
* can use the factory to configure and obtain stream instances.
* <p>
* Note that this is a new method that replaces the deprecated newInstance() method.
* No changes in behavior are defined by this replacement method relative to the
* deprecated method.
*
* @throws FactoryConfigurationError in case of {@linkplain
* java.util.ServiceConfigurationError service configuration error} or if
* the implementation is not available or cannot be instantiated.
*/
public static XMLOutputFactory newFactory()
throws FactoryConfigurationError
{
return FactoryFinder.find(XMLOutputFactory.class, DEFAULIMPL);
}
/**
* Create a new instance of the factory.
*
* @param factoryId Name of the factory to find, same as
* a property name
* @param classLoader classLoader to use
* @return the factory implementation
* @throws FactoryConfigurationError if an instance of this factory cannot be loaded
*
* @deprecated This method has been deprecated because it returns an
* instance of XMLInputFactory, which is of the wrong class.
* Use the new method {@link #newFactory(java.lang.String,
* java.lang.ClassLoader)} instead.
*/
public static XMLInputFactory newInstance(String factoryId,
ClassLoader classLoader)
throws FactoryConfigurationError {
//do not fallback if given classloader can't find the class, throw exception
return FactoryFinder.find(XMLInputFactory.class, factoryId, classLoader, null);
}
/**
* Create a new instance of the factory.
* If the classLoader argument is null, then the ContextClassLoader is used.
* <p>
* This method uses the following ordered lookup procedure to determine
* the XMLOutputFactory implementation class to load:
* <ul>
* <li>
* Use the value of the system property identified by {@code factoryId}.
* </li>
* <li>
* <p>
* Use the configuration file "stax.properties". The file is in standard
* {@link java.util.Properties} format and typically located in the
* {@code conf} directory of the Java installation. It contains the fully qualified
* name of the implementation class with the key being the system property
* defined above.
*
* <p>
* The stax.properties file is read only once by the implementation
* and its 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 stax.properties after it has been read for the first time.
*
* <p>
* Use the jaxp configuration file "jaxp.properties". The file is in the same
* format as stax.properties and will only be read if stax.properties does
* not exist.
* </li>
* <li>
* <p>
* If {@code factoryId} is "javax.xml.stream.XMLOutputFactory",
* use the service-provider loading facility, defined by the
* {@link java.util.ServiceLoader} class, to attempt to {@linkplain
* java.util.ServiceLoader#load(java.lang.Class, java.lang.ClassLoader) locate and load}
* an implementation of the service using the specified {@code ClassLoader}.
* If {@code classLoader} is null, the {@linkplain
* java.util.ServiceLoader#load(java.lang.Class) default loading mechanism} will apply:
* That is, the service-provider loading facility will use the {@linkplain
* java.lang.Thread#getContextClassLoader() current thread's context class loader}
* to attempt to load the service. If the context class
* loader is null, the {@linkplain
* ClassLoader#getSystemClassLoader() system class loader} will be used.
* </li>
* <li>
* <p>
* Otherwise, throws a {@link FactoryConfigurationError}.
* </li>
* </ul>
*
* @apiNote The parameter factoryId defined here is inconsistent with that
* of other JAXP factories where the first parameter is fully qualified
* factory class name that provides implementation of the factory.
*
* <p>
* Note that this is a new method that replaces the deprecated
* {@link #newInstance(java.lang.String, java.lang.ClassLoader)
* newInstance(String factoryId, ClassLoader classLoader)} method.
* The original method was incorrectly defined to return XMLInputFactory.
*
*
* @param factoryId Name of the factory to find, same as
* a property name
* @param classLoader classLoader to use
* @return the factory implementation
* @throws FactoryConfigurationError in case of {@linkplain
* java.util.ServiceConfigurationError service configuration error} or if
* the implementation is not available or cannot be instantiated.
*/
public static XMLOutputFactory newFactory(String factoryId,
ClassLoader classLoader)
throws FactoryConfigurationError {
//do not fallback if given classloader can't find the class, throw exception
return FactoryFinder.find(XMLOutputFactory.class, factoryId, classLoader, null);
}
/**
* Create a new XMLStreamWriter that writes to a writer
* @param stream the writer to write to
* @throws XMLStreamException
*/
public abstract XMLStreamWriter createXMLStreamWriter(java.io.Writer stream) throws XMLStreamException;
/**
* Create a new XMLStreamWriter that writes to a stream
* @param stream the stream to write to
* @throws XMLStreamException
*/
public abstract XMLStreamWriter createXMLStreamWriter(java.io.OutputStream stream) throws XMLStreamException;
/**
* Create a new XMLStreamWriter that writes to a stream
* @param stream the stream to write to
* @param encoding the encoding to use
* @throws XMLStreamException
*/
public abstract XMLStreamWriter createXMLStreamWriter(java.io.OutputStream stream,
String encoding) throws XMLStreamException;
/**
* Create a new XMLStreamWriter that writes to a JAXP result. This method is optional.
* @param result the result to write to
* @throws UnsupportedOperationException if this method is not
* supported by this XMLOutputFactory
* @throws XMLStreamException
*/
public abstract XMLStreamWriter createXMLStreamWriter(Result result) throws XMLStreamException;
/**
* Create a new XMLEventWriter that writes to a JAXP result. This method is optional.
* @param result the result to write to
* @throws UnsupportedOperationException if this method is not
* supported by this XMLOutputFactory
* @throws XMLStreamException
*/
public abstract XMLEventWriter createXMLEventWriter(Result result) throws XMLStreamException;
/**
* Create a new XMLEventWriter that writes to a stream
* @param stream the stream to write to
* @throws XMLStreamException
*/
public abstract XMLEventWriter createXMLEventWriter(java.io.OutputStream stream) throws XMLStreamException;
/**
* Create a new XMLEventWriter that writes to a stream
* @param stream the stream to write to
* @param encoding the encoding to use
* @throws XMLStreamException
*/
public abstract XMLEventWriter createXMLEventWriter(java.io.OutputStream stream,
String encoding) throws XMLStreamException;
/**
* Create a new XMLEventWriter that writes to a writer
* @param stream the stream to write to
* @throws XMLStreamException
*/
public abstract XMLEventWriter createXMLEventWriter(java.io.Writer stream) throws XMLStreamException;
/**
* Allows the user to set specific features/properties on the underlying implementation.
* @param name The name of the property
* @param value The value of the property
* @throws java.lang.IllegalArgumentException if the property is not supported
*/
public abstract void setProperty(java.lang.String name,
Object value)
throws IllegalArgumentException;
/**
* Get a feature/property on the underlying implementation
* @param name The name of the property
* @return The value of the property
* @throws java.lang.IllegalArgumentException if the property is not supported
*/
public abstract Object getProperty(java.lang.String name)
throws IllegalArgumentException;
/**
* Query the set of properties that this factory supports.
*
* @param name The name of the property (may not be null)
* @return true if the property is supported and false otherwise
*/
public abstract boolean isPropertySupported(String name);
}