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/*
 * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
 * 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
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package javax.xml.stream.util;

import javax.xml.stream.events.XMLEvent;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamException;


This interface defines a class that allows a user to register
a way to allocate events given an XMLStreamReader.  An implementation
is not required to use the XMLEventFactory implementation but this
is recommended.  The XMLEventAllocator can be set on an XMLInputFactory
using the property "javax.xml.stream.allocator"

Author:Copyright (c) 2009 by Oracle Corporation. All Rights Reserved.
See Also:
Version:1.0
Since:1.6
/**
 * This interface defines a class that allows a user to register
 * a way to allocate events given an XMLStreamReader.  An implementation
 * is not required to use the XMLEventFactory implementation but this
 * is recommended.  The XMLEventAllocator can be set on an XMLInputFactory
 * using the property "javax.xml.stream.allocator"
 *
 * @version 1.0
 * @author Copyright (c) 2009 by Oracle Corporation. All Rights Reserved.
 * @see javax.xml.stream.XMLInputFactory
 * @see javax.xml.stream.XMLEventFactory
 * @since 1.6
 */
public interface XMLEventAllocator {

  
This method creates an instance of the XMLEventAllocator. This
allows the XMLInputFactory to allocate a new instance per reader.

/**
   * This method creates an instance of the XMLEventAllocator. This
   * allows the XMLInputFactory to allocate a new instance per reader.
   */
  public XMLEventAllocator newInstance();

  
This method allocates an event given the current
state of the XMLStreamReader.  If this XMLEventAllocator
does not have a one-to-one mapping between reader states
and events this method will return null.  This method
must not modify the state of the XMLStreamReader.

Params:
  • reader – The XMLStreamReader to allocate from
Returns:the event corresponding to the current reader state
/**
   * This method allocates an event given the current
   * state of the XMLStreamReader.  If this XMLEventAllocator
   * does not have a one-to-one mapping between reader states
   * and events this method will return null.  This method
   * must not modify the state of the XMLStreamReader.
   * @param reader The XMLStreamReader to allocate from
   * @return the event corresponding to the current reader state
   */
  public XMLEvent allocate(XMLStreamReader reader)
    throws XMLStreamException;

  
This method allocates an event or set of events
given the current
state of the XMLStreamReader and adds the event
or set of events to the
consumer that was passed in.  This method can be used
to expand or contract reader states into event states.
This method may modify the state of the XMLStreamReader.

Params:
  • reader – The XMLStreamReader to allocate from
  • consumer – The XMLEventConsumer to add to.
/**
   * This method allocates an event or set of events
   * given the current
   * state of the XMLStreamReader and adds the event
   * or set of events to the
   * consumer that was passed in.  This method can be used
   * to expand or contract reader states into event states.
   * This method may modify the state of the XMLStreamReader.
   * @param reader The XMLStreamReader to allocate from
   * @param consumer The XMLEventConsumer to add to.
   */
  public void allocate(XMLStreamReader reader, XMLEventConsumer consumer)
    throws XMLStreamException;

}