private void writeCollection(
final OutputStream outputStream,
final Type collectionType,
final Collection<?> collection,
final QName outerTagName) {
final Class<?> rawType;
if (collectionType instanceof ParameterizedType) {
final ParameterizedType returnType = (ParameterizedType) collectionType;
rawType = (Class<?>) returnType.getRawType();
} else if (collectionType instanceof Class<?>) {
rawType = (Class<?>) collectionType;
} else if (collectionType instanceof WildcardType) {
final Type[] UpperBounds = ((WildcardType) collectionType).getUpperBounds();
if (UpperBounds.length > 0) {
rawType = (Class<?>) UpperBounds[0];
} else {
rawType = Object.class;
}
} else if (collectionType instanceof TypeVariable) {
final Type[] UpperBounds = ((TypeVariable<?>) collectionType).getBounds();
if (UpperBounds.length > 0) {
rawType = (Class<?>) UpperBounds[0];
} else {
rawType = Object.class;
}
} else {
throw new IllegalArgumentException("Unsupported type variable");
}
Class<?> elementType;
if (Collection.class.isAssignableFrom(rawType)) {
final Type[] paramTypes = Types.getTypeParametersFor(Collection.class, collectionType);
elementType = Types.toRawType(paramTypes[0]);
if (elementType.isInterface()) {
// interfaces not supported by jaxb
elementType = Types.commonAncestor(collection);
}
} else {
elementType = Types.commonAncestor(collection);
}
try {
// As long as JAXB is an option, we have to know that this is a StAXWriter as JAXB needs to
// write to that.
try (XmlWriter xmlWriter = XmlStreaming.newWriter(outputStream, "UTF-8")) {
Marshaller marshaller = null;
XmlWriterUtil.smartStartTag(xmlWriter, outerTagName);
for (Object item : collection) {
if (item != null) {
if (item instanceof XmlSerializable) {
((XmlSerializable) item).serialize(xmlWriter);
} else if (item instanceof Node) {
XmlWriterUtil.serialize(xmlWriter, (Node) item);
} else {
if (marshaller == null) {
JAXBContext jaxbcontext = null;
if (elementType == null) {
jaxbcontext = newJAXBContext(JAXBCollectionWrapper.class);
} else {
jaxbcontext = newJAXBContext(JAXBCollectionWrapper.class, elementType);
}
marshaller = jaxbcontext.createMarshaller();
}
marshaller.marshal(item, (XMLStreamWriter) getDelegateMethod().invoke(xmlWriter));
}
}
}
XmlWriterUtil.endTag(xmlWriter, outerTagName);
}
} catch (Throwable e) {
throw new MessagingException(e);
}
}