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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

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 *

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/*

 * Copyright (c) 2009, 2013, by Oracle Corporation. All Rights Reserved.

 */

package javax.xml.stream;

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>

 *      </tbody>

 *   </table>

 *

 *

 * <p>The property can be set with the following code line:

 *

 * <p>This property specifies that the writer default namespace prefix declarations.

 *

 * <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

 *

 * <p>If an element or attribute name has a prefix, but is not

 * bound to any namespace URI, then the prefix will be removed

 *

 * <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

 *

 * <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

 *

 * <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

 *

 * @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 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 system-default implementation is returned.

   * </li>

   * <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);

}