org.codehaus.stax2.ri.Stax2EventWriterImpl Maven / Gradle / Ivy
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package org.codehaus.stax2.ri;
import java.util.Iterator;
import javax.xml.namespace.NamespaceContext;
import javax.xml.namespace.QName;
import javax.xml.stream.*;
import javax.xml.stream.events.*;
import org.codehaus.stax2.*;
import org.codehaus.stax2.evt.XMLEvent2;
/**
* Simple implementation of {@link XMLEventWriter}.
*/
public class Stax2EventWriterImpl
implements XMLEventWriter,
XMLStreamConstants
{
final protected XMLStreamWriter2 _writer;
/*
/**********************************************************************
/* Construction, init
/**********************************************************************
*/
public Stax2EventWriterImpl(XMLStreamWriter2 sw)
{
_writer = sw;
}
/*
/**********************************************************************
/* XMLEventWriter API
/**********************************************************************
*/
/**
* Basic implementation of the method which will use event implementations
* available as part of the reference implementation.
*
* Note: ALL events (except for custom ones ref. impl. itself doesn't
* produce, and thus may not always be able to deal with) are routed
* through stream writer. This because it may want to do
* different kinds of validation
*/
public void add(XMLEvent event)
throws XMLStreamException
{
switch (event.getEventType()) {
/* First events that we have to route via stream writer, to
* get and/or update namespace information:
*/
case ATTRIBUTE: // need to pass to stream writer, to get namespace info
{
Attribute attr = (Attribute) event;
QName name = attr.getName();
_writer.writeAttribute(name.getPrefix(), name.getNamespaceURI(),
name.getLocalPart(), attr.getValue());
}
break;
case END_DOCUMENT:
_writer.writeEndDocument();
break;
case END_ELEMENT:
_writer.writeEndElement();
break;
case NAMESPACE:
{
Namespace ns = (Namespace) event;
_writer.writeNamespace(ns.getPrefix(), ns.getNamespaceURI());
}
break;
case START_DOCUMENT:
{
StartDocument sd = (StartDocument) event;
if (!sd.encodingSet()) { // encoding defined?
_writer.writeStartDocument(sd.getVersion());
} else {
_writer.writeStartDocument(sd.getCharacterEncodingScheme(),
sd.getVersion());
}
}
break;
case START_ELEMENT:
{
StartElement se = event.asStartElement();
QName n = se.getName();
_writer.writeStartElement(n.getPrefix(), n.getLocalPart(),
n.getNamespaceURI());
Iterator it = se.getNamespaces();
while (it.hasNext()) {
Namespace ns = (Namespace) it.next();
add(ns);
}
it = se.getAttributes();
while (it.hasNext()) {
Attribute attr = (Attribute) it.next();
add(attr);
}
}
break;
/* Then events we could output directly if necessary... but that
* make sense to route via stream writer, for validation
* purposes.
*/
case CHARACTERS: // better pass to stream writer, for prolog/epilog validation
{
Characters ch = event.asCharacters();
String text = ch.getData();
if (ch.isCData()) {
_writer.writeCData(text);
} else {
_writer.writeCharacters(text);
}
}
break;
case CDATA:
_writer.writeCData(event.asCharacters().getData());
break;
case COMMENT:
_writer.writeComment(((Comment) event).getText());
break;
case DTD:
_writer.writeDTD(((DTD) event).getDocumentTypeDeclaration());
break;
case ENTITY_REFERENCE:
_writer.writeEntityRef(((EntityReference) event).getName());
break;
case PROCESSING_INSTRUCTION: // let's just write directly
{
ProcessingInstruction pi = (ProcessingInstruction) event;
_writer.writeProcessingInstruction(pi.getTarget(), pi.getData());
}
break;
case ENTITY_DECLARATION: // not yet produced by Wstx
case NOTATION_DECLARATION: // not yet produced by Wstx
case SPACE: // usually only CHARACTERS events exist...
default:
// Easy, if stax2 enabled
if (event instanceof XMLEvent2) {
((XMLEvent2) event).writeUsing(_writer);
} else {
// Otherwise... well, no real way to do it in generic manner
throw new XMLStreamException("Don't know how to output event "+event);
}
}
}
public void add(XMLEventReader reader)
throws XMLStreamException
{
while (reader.hasNext()) {
add(reader.nextEvent());
}
}
public void close()
throws XMLStreamException
{
_writer.close();
}
public void flush()
throws XMLStreamException
{
_writer.flush();
}
public NamespaceContext getNamespaceContext() {
return _writer.getNamespaceContext();
}
public String getPrefix(String uri)
throws XMLStreamException
{
return _writer.getPrefix(uri);
}
public void setDefaultNamespace(String uri)
throws XMLStreamException
{
_writer.setDefaultNamespace(uri);
}
public void setNamespaceContext(NamespaceContext ctxt)
throws XMLStreamException
{
_writer.setNamespaceContext(ctxt);
}
public void setPrefix(String prefix, String uri)
throws XMLStreamException
{
_writer.setPrefix(prefix, uri);
}
}