/*

 * 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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

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 */

/*

 * Copyright (c) 2003 by BEA Systems, Inc. All Rights Reserved.

 */

package javax.xml.stream;

import javax.xml.transform.Source;

import javax.xml.stream.util.XMLEventAllocator;

/**

 * Defines an abstract implementation of a factory for getting streams.

 *

 * 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="5">

 *          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.isValidating</td><td>Turns on/off implementation specific DTD validation</td><td>Boolean</td><td>False</td><td>No</td></tr>

 * <tr><td>javax.xml.stream.isNamespaceAware</td><td>Turns on/off namespace processing for XML 1.0 support</td><td>Boolean</td><td>True</td><td>True (required) / False (optional)</td></tr>

 * <tr><td>javax.xml.stream.isCoalescing</td><td>Requires the processor to coalesce adjacent character data</td><td>Boolean</td><td>False</td><td>Yes</td></tr>

 * <tr><td>javax.xml.stream.isReplacingEntityReferences</td><td>replace internal entity references with their replacement text and report them as characters</td><td>Boolean</td><td>True</td><td>Yes</td></tr>

 *<tr><td>javax.xml.stream.isSupportingExternalEntities</td><td>Resolve external parsed entities</td><td>Boolean</td><td>Unspecified</td><td>Yes</td></tr>

 *<tr><td>javax.xml.stream.supportDTD</td><td>Use this property to request processors that do not support DTDs</td><td>Boolean</td><td>True</td><td>Yes</td></tr>

 *<tr><td>javax.xml.stream.reporter</td><td>sets/gets the impl of the XMLReporter </td><td>javax.xml.stream.XMLReporter</td><td>Null</td><td>Yes</td></tr>

 *<tr><td>javax.xml.stream.resolver</td><td>sets/gets the impl of the XMLResolver interface</td><td>javax.xml.stream.XMLResolver</td><td>Null</td><td>Yes</td></tr>

 *<tr><td>javax.xml.stream.allocator</td><td>sets/gets the impl of the XMLEventAllocator interface</td><td>javax.xml.stream.util.XMLEventAllocator</td><td>Null</td><td>Yes</td></tr>

 *    </tbody>

 *  </table>

 *

 *

 * @author Copyright (c) 2003 by BEA Systems. All Rights Reserved.

 * @see XMLOutputFactory

 * @see XMLEventReader

 * @see XMLStreamReader

 * @see EventFilter

 * @see XMLReporter

 * @see XMLResolver

 * @see javax.xml.stream.util.XMLEventAllocator

 * @since 1.6

 */

public abstract class XMLInputFactory {

  /**

   * The property used to turn on/off namespace support,

   * this is to support XML 1.0 documents,

   * only the true setting must be supported

   */

  public static final String IS_NAMESPACE_AWARE=

    "javax.xml.stream.isNamespaceAware";

  /**

   * The property used to turn on/off implementation specific validation

   */

  public static final String IS_VALIDATING=

    "javax.xml.stream.isValidating";

  /**

   * The property that requires the parser to coalesce adjacent character data sections

   */

  public static final String IS_COALESCING=

    "javax.xml.stream.isCoalescing";

  /**

   * Requires the parser to replace internal

   * entity references with their replacement

   * text and report them as characters

   */

  public static final String IS_REPLACING_ENTITY_REFERENCES=

    "javax.xml.stream.isReplacingEntityReferences";

  /**

   *  The property that requires the parser to resolve external parsed entities

   */

  public static final String IS_SUPPORTING_EXTERNAL_ENTITIES=

    "javax.xml.stream.isSupportingExternalEntities";

  /**

   *  The property that requires the parser to support DTDs

   */

  public static final String SUPPORT_DTD=

    "javax.xml.stream.supportDTD";

  /**

   * The property used to

   * set/get the implementation of the XMLReporter interface

   */

  public static final String REPORTER=

    "javax.xml.stream.reporter";

  /**

   * The property used to set/get the implementation of the XMLResolver

   */

  public static final String RESOLVER=

    "javax.xml.stream.resolver";

  /**

   * The property used to set/get the implementation of the allocator

   */

  public static final String ALLOCATOR=

    "javax.xml.stream.allocator";

  protected XMLInputFactory(){}

  /**

   * Create a new instance of the factory.

   * This static method creates a new factory instance.

   * This method uses the following ordered lookup procedure to determine

   * the XMLInputFactory implementation class to load:

   * Use the javax.xml.stream.XMLInputFactory system property.

   * Use the properties file "lib/stax.properties" in the JRE directory.

   * This configuration file is in standard java.util.Properties format and contains

   * the fully qualified name of the implementation class with the key being the system property defined above.

   * Use the Services API (as detailed in the JAR specification), if available, to determine the classname.

   * The Services API will look for a classname in the file META-INF/services/javax.xml.stream.XMLInputFactory

   * in jars available to the runtime.

   * Platform default XMLInputFactory instance.

   * Once an application has obtained a reference to a XMLInputFactory

   * it can use the factory to configure and obtain stream instances.

   *

   * @throws FactoryConfigurationError if an instance of this factory cannot be loaded

   */

  public static XMLInputFactory newInstance()

    throws FactoryConfigurationError

  {

    return (XMLInputFactory) FactoryFinder.find(

      "javax.xml.stream.XMLInputFactory",

      "com.sun.xml.internal.stream.XMLInputFactoryImpl");

  }

  /**

   * 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

   */

  public static XMLInputFactory newInstance(String factoryId,

          ClassLoader classLoader)

          throws FactoryConfigurationError {

      try {

          //do not fallback if given classloader can't find the class, throw exception

          return (XMLInputFactory) FactoryFinder.newInstance(factoryId, classLoader, false);

      } catch (FactoryFinder.ConfigurationError e) {

          throw new FactoryConfigurationError(e.getException(),

                  e.getMessage());

      }

  }

  /**

   * Create a new XMLStreamReader from a reader

   * @param reader the XML data to read from

   * @throws XMLStreamException

   */

  public abstract XMLStreamReader createXMLStreamReader(java.io.Reader reader)

    throws XMLStreamException;

  /**

   * Create a new XMLStreamReader from a JAXP source.  This method is optional.

   * @param source the source to read from

   * @throws UnsupportedOperationException if this method is not

   * supported by this XMLInputFactory

   * @throws XMLStreamException

   */

  public abstract XMLStreamReader createXMLStreamReader(Source source)

    throws XMLStreamException;

  /**

   * Create a new XMLStreamReader from a java.io.InputStream

   * @param stream the InputStream to read from

   * @throws XMLStreamException

   */

  public abstract XMLStreamReader createXMLStreamReader(java.io.InputStream stream)

    throws XMLStreamException;

  /**

   * Create a new XMLStreamReader from a java.io.InputStream

   * @param stream the InputStream to read from

   * @param encoding the character encoding of the stream

   * @throws XMLStreamException

   */

  public abstract XMLStreamReader createXMLStreamReader(java.io.InputStream stream, String encoding)

    throws XMLStreamException;

  /**

   * Create a new XMLStreamReader from a java.io.InputStream

   * @param systemId the system ID of the stream

   * @param stream the InputStream to read from

   */

  public abstract XMLStreamReader createXMLStreamReader(String systemId, java.io.InputStream stream)

    throws XMLStreamException;

  /**

   * Create a new XMLStreamReader from a java.io.InputStream

   * @param systemId the system ID of the stream

   * @param reader the InputStream to read from

   */

  public abstract XMLStreamReader createXMLStreamReader(String systemId, java.io.Reader reader)

    throws XMLStreamException;

  /**

   * Create a new XMLEventReader from a reader

   * @param reader the XML data to read from

   * @throws XMLStreamException

   */

  public abstract XMLEventReader createXMLEventReader(java.io.Reader reader)

    throws XMLStreamException;

  /**

   * Create a new XMLEventReader from a reader

   * @param systemId the system ID of the input

   * @param reader the XML data to read from

   * @throws XMLStreamException

   */

  public abstract XMLEventReader createXMLEventReader(String systemId, java.io.Reader reader)

    throws XMLStreamException;

  /**

   * Create a new XMLEventReader from an XMLStreamReader.  After being used

   * to construct the XMLEventReader instance returned from this method

   * the XMLStreamReader must not be used.

   * @param reader the XMLStreamReader to read from (may not be modified)

   * @return a new XMLEventReader

   * @throws XMLStreamException

   */

  public abstract XMLEventReader createXMLEventReader(XMLStreamReader reader)

    throws XMLStreamException;

  /**

   * Create a new XMLEventReader from a JAXP source.

   * Support of this method is optional.

   * @param source the source to read from

   * @throws UnsupportedOperationException if this method is not

   * supported by this XMLInputFactory

   */

  public abstract XMLEventReader createXMLEventReader(Source source)

    throws XMLStreamException;

  /**

   * Create a new XMLEventReader from a java.io.InputStream

   * @param stream the InputStream to read from

   * @throws XMLStreamException

   */

  public abstract XMLEventReader createXMLEventReader(java.io.InputStream stream)

    throws XMLStreamException;

  /**

   * Create a new XMLEventReader from a java.io.InputStream

   * @param stream the InputStream to read from

   * @param encoding the character encoding of the stream

   * @throws XMLStreamException

   */

  public abstract XMLEventReader createXMLEventReader(java.io.InputStream stream, String encoding)

    throws XMLStreamException;

  /**

   * Create a new XMLEventReader from a java.io.InputStream

   * @param systemId the system ID of the stream

   * @param stream the InputStream to read from

   * @throws XMLStreamException

   */

  public abstract XMLEventReader createXMLEventReader(String systemId, java.io.InputStream stream)

    throws XMLStreamException;

  /**

   * Create a filtered reader that wraps the filter around the reader

   * @param reader the reader to filter

   * @param filter the filter to apply to the reader

   * @throws XMLStreamException

   */

  public abstract XMLStreamReader createFilteredReader(XMLStreamReader reader, StreamFilter filter)

    throws XMLStreamException;

  /**

   * Create a filtered event reader that wraps the filter around the event reader

   * @param reader the event reader to wrap

   * @param filter the filter to apply to the event reader

   * @throws XMLStreamException

   */

  public abstract XMLEventReader createFilteredReader(XMLEventReader reader, EventFilter filter)

    throws XMLStreamException;

  /**

   * The resolver that will be set on any XMLStreamReader or XMLEventReader created

   * by this factory instance.

   */

  public abstract XMLResolver getXMLResolver();

  /**

   * The resolver that will be set on any XMLStreamReader or XMLEventReader created

   * by this factory instance.

   * @param resolver the resolver to use to resolve references

   */

  public abstract void  setXMLResolver(XMLResolver resolver);

  /**

   * The reporter that will be set on any XMLStreamReader or XMLEventReader created

   * by this factory instance.

   */

  public abstract XMLReporter getXMLReporter();

  /**

   * The reporter that will be set on any XMLStreamReader or XMLEventReader created

   * by this factory instance.

   * @param reporter the resolver to use to report non fatal errors

   */

  public abstract void setXMLReporter(XMLReporter reporter);

  /**

   * Allows the user to set specific feature/property on the underlying implementation. The underlying implementation

   * is not required to support every setting of every property in the specification and may use IllegalArgumentException

   * to signal that an unsupported property may not be set with the specified value.

   * @param name The name of the property (may not be null)

   * @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 java.lang.IllegalArgumentException;

  /**

   * Get the value of a feature/property from the underlying implementation

   * @param name The name of the property (may not be null)

   * @return The value of the property

   * @throws IllegalArgumentException if the property is not supported

   */

  public abstract Object getProperty(java.lang.String name)

    throws java.lang.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);

  /**

   * Set a user defined event allocator for events

   * @param allocator the user defined allocator

   */

  public abstract void setEventAllocator(XMLEventAllocator allocator);

  /**

   * Gets the allocator used by streams created with this factory

   */

  public abstract XMLEventAllocator getEventAllocator();

}