/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache
* XMLBeans", nor may "Apache" appear in their name, without prior
* written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 2000-2003 BEA Systems
* Inc., <http://www.bea.com/>. For more information on the Apache Software
* Foundation, please see <http://www.apache.org/>.
*/
package org.apache.xmlbeans.impl.common;
import weblogic.xml.stream.ReferenceResolver;
import weblogic.xml.stream.XMLEvent;
import weblogic.xml.stream.XMLInputStream;
import weblogic.xml.stream.XMLName;
import weblogic.xml.stream.XMLStreamException;
public class GenericXmlInputStream implements XMLInputStream
{
public GenericXmlInputStream ( )
{
_master = this;
_elementCount = 1; // Go all the way
}
private GenericXmlInputStream ( GenericXmlInputStream master )
{
(_master = master).ensureInit();
_nextEvent = master._nextEvent;
}
//
// The source for all events
//
protected XMLEvent nextEvent ( ) throws XMLStreamException
{
throw new RuntimeException( "nextEvent not overridden" );
}
//
//
//
private class EventItem
{
EventItem ( XMLEvent e )
{
_event = e;
}
int getType ( ) { return _event.getType(); }
boolean hasName ( ) { return _event.hasName(); }
XMLName getName ( ) { return _event.getName(); }
final XMLEvent _event;
EventItem _next;
}
private void ensureInit ( )
{
if (!_master._initialized)
{
try
{
_master._nextEvent = getNextEvent();
}
catch ( XMLStreamException e )
{
throw new RuntimeException( e );
}
_master._initialized = true;
}
}
private EventItem getNextEvent ( ) throws XMLStreamException
{
XMLEvent e = nextEvent();
return e == null ? null : new EventItem( e );
}
public XMLEvent next ( ) throws XMLStreamException
{
ensureInit();
EventItem currentEvent = _nextEvent;
if (_nextEvent != null)
{
if (_nextEvent._next == null)
_nextEvent._next = _master.getNextEvent();
_nextEvent = _nextEvent._next;
}
if (currentEvent == null)
return null;
if (currentEvent.getType() == XMLEvent.END_ELEMENT)
{
if (--_elementCount <= 0)
_nextEvent = null;
}
else if (currentEvent.getType() == XMLEvent.START_ELEMENT)
_elementCount++;
return currentEvent._event;
}
public boolean hasNext ( ) throws XMLStreamException
{
ensureInit();
return _nextEvent != null;
}
public void skip ( ) throws XMLStreamException
{
next();
}
public void skipElement ( ) throws XMLStreamException
{
ensureInit();
for ( ; _nextEvent != null ; next() )
{
if (_nextEvent.getType() == XMLEvent.START_ELEMENT)
break;
}
int count = 0;
for ( ; _nextEvent != null ; next() )
{
int type = next().getType();
if (type == XMLEvent.START_ELEMENT)
count++;
else if (type == XMLEvent.END_ELEMENT && --count == 0)
break;
}
}
public XMLEvent peek ( ) throws XMLStreamException
{
ensureInit();
return _nextEvent._event;
}
public boolean skip ( int eventType ) throws XMLStreamException
{
ensureInit();
for ( ; _nextEvent != null ; next() )
{
if (_nextEvent.getType() == eventType)
return true;
}
return false;
}
public boolean skip ( XMLName name ) throws XMLStreamException
{
ensureInit();
for ( ; _nextEvent != null ; next() )
{
if (_nextEvent.hasName() && _nextEvent.getName().equals( name ))
return true;
}
return false;
}
public boolean skip ( XMLName name, int eventType ) throws XMLStreamException
{
ensureInit();
for ( ; _nextEvent != null ; next() )
{
if (_nextEvent.getType() == eventType &&
_nextEvent.hasName() &&
_nextEvent.getName().equals( name ))
{
return true;
}
}
return false;
}
public XMLInputStream getSubStream ( ) throws XMLStreamException
{
ensureInit();
GenericXmlInputStream subStream = new GenericXmlInputStream( this );
subStream.skip( XMLEvent.START_ELEMENT );
return subStream;
}
public void close ( ) throws XMLStreamException
{
// BUGBUG - can I do anything here, really?
// SHould I count the number of open sub streams?
// I have no destructor, how can I close properly?
}
public ReferenceResolver getReferenceResolver ( )
{
ensureInit();
throw new RuntimeException( "Not impl" );
}
public void setReferenceResolver ( ReferenceResolver resolver )
{
ensureInit();
throw new RuntimeException( "Not impl" );
}
private boolean _initialized;
private EventItem _nextEvent;
private int _elementCount;
private GenericXmlInputStream _master;
}