/* Copyright 2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.xmlbeans.impl.common;
import org.apache.xmlbeans.xml.stream.ReferenceResolver;
import org.apache.xmlbeans.xml.stream.XMLEvent;
import org.apache.xmlbeans.xml.stream.XMLInputStream;
import org.apache.xmlbeans.xml.stream.XMLName;
import org.apache.xmlbeans.xml.stream.XMLStreamException;
/**
* @deprecated XMLInputStream was deprecated by XMLStreamReader from STaX - jsr173 API.
*/
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;
}