private Transformer<?, ?> getJavaFallbackTransformer(QName from, QName to) {
Class<?> javaType = JavaService.toJavaMessageType(from);
if (javaType == null) {
return null;
}
Set<Map.Entry<NameKey, Transformer<?, ?>>> entrySet = _transformers.entrySet();
List<JavaSourceFallbackTransformer> fallbackTransforms =
new ArrayList<JavaSourceFallbackTransformer>();
for (Map.Entry<NameKey, Transformer<?, ?>> entry : entrySet) {
NameKey nameKey = entry.getKey();
// "to" must be an exact match...
if (nameKey.getTo().equals(to)) {
if (JavaService.isJavaMessageType(nameKey.getFrom())) {
Class<?> candidateType = JavaService.toJavaMessageType(nameKey.getFrom());
if (candidateType != null && candidateType.isAssignableFrom(javaType)) {
fallbackTransforms.add(
new JavaSourceFallbackTransformer(candidateType, entry.getValue()));
}
}
}
}
if (fallbackTransforms.size() == 0) {
// No fallback...
return null;
}
if (fallbackTransforms.size() == 1) {
Transformer<?, ?> fallbackTransformer = fallbackTransforms.get(0)._transformer;
addFallbackTransformer(fallbackTransformer, from, to);
return fallbackTransformer;
}
try {
JavaSourceFallbackTransformerComparator comparator =
new JavaSourceFallbackTransformerComparator();
Collections.sort(fallbackTransforms, comparator);
// Closest super-type will be first in the list..
Transformer<?, ?> fallbackTransformer = fallbackTransforms.get(0)._transformer;
addFallbackTransformer(fallbackTransformer, from, to);
return fallbackTransformer;
} catch (MultipleFallbacks e) {
_log.debug(
"Cannot resolve fallback Transformer from '"
+ from
+ "' to '"
+ to
+ "'. "
+ e.getMessage());
return null;
}
}
@Override
public Transformer<?, ?> getTransformer(QName from, QName to) {
NameKey nameKey = new NameKey(from, to);
Transformer<?, ?> transformer = _transformers.get(nameKey);
if (transformer == null) {
transformer = _fallbackTransformers.get(nameKey);
if (transformer == null && JavaService.isJavaMessageType(from)) {
transformer = getJavaFallbackTransformer(from, to);
}
}
return transformer;
}