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/*
* $Id: BaseXMLEventReader.java,v 1.1 2004/07/05 23:13:31 cniles Exp $
*
* Copyright (c) 2004, Christian Niles, unit12.net
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of Christian Niles, Unit12, nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS 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 COPYRIGHT OWNER OR 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.
*
*/
package javanet.staxutils;
import java.util.NoSuchElementException;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.Comment;
import javax.xml.stream.events.XMLEvent;
/**
* Abstract base class for {@link XMLEventReader} implementations.
*
* @author Christian Niles
* @version $Revision: 1.1 $
*/
public abstract class BaseXMLEventReader implements XMLEventReader {
/** Whether we've been closed or not. */
protected boolean closed;
public synchronized String getElementText() throws XMLStreamException {
if (closed) {
throw new XMLStreamException("Stream has been closed");
}
// TODO At the moment, this simply coalesces all Characters events up to a
// terminal EndElement event.
StringBuffer buffer = new StringBuffer();
while (true) {
XMLEvent event = nextEvent();
if (event.isCharacters()) {
// don't return ignorable whitespace
if (event.getEventType() != XMLEvent.SPACE) {
buffer.append(event.asCharacters().getData());
}
} else if (event.isEndElement()) {
break;
} else {
throw new XMLStreamException(
"Non-text event encountered in getElementText(): "
+ event);
}
}
return buffer.toString();
}
public XMLEvent nextTag() throws XMLStreamException {
if (closed) {
throw new XMLStreamException("Stream has been closed");
}
XMLEvent event;
do {
if (hasNext()) {
event = nextEvent();
if (event.isStartElement() || event.isEndElement()) {
return event;
} else if (event.isCharacters()) {
if (!event.asCharacters().isWhiteSpace()) {
throw new XMLStreamException(
"Non-ignorable space encountered");
}
} else if (!(event instanceof Comment)) {
throw new XMLStreamException(
"Non-ignorable event encountered: " + event);
}
} else {
throw new XMLStreamException("Ran out of events in nextTag()");
}
} while (!event.isStartElement() && !event.isEndElement());
return event;
}
public Object getProperty(String name) throws IllegalArgumentException {
throw new IllegalArgumentException("Property not supported: " + name);
}
public synchronized void close() throws XMLStreamException {
if (!closed) {
closed = true;
}
}
public Object next() {
try {
return nextEvent();
} catch (XMLStreamException e) {
NoSuchElementException ex = new NoSuchElementException(
"Error getting next event");
ex.initCause(e);
throw ex;
}
}
public void remove() {
throw new UnsupportedOperationException();
}
}