private String toDescription(Transformer<?, ?> transformer) {
return transformer.getClass().getName()
+ "("
+ transformer.getFrom()
+ ", "
+ transformer.getTo()
+ ")";
}
@Override
public <T> T getContent(final Class<T> type) {
if (type == null) {
throw new IllegalArgumentException("null 'type' argument.");
}
if (_content == null) {
return null;
}
if (type.isInstance(_content)) {
return type.cast(_content);
}
if (_transformerRegistry == null) {
throw new SwitchYardException(
"Cannot convert from '"
+ _content.getClass().getName()
+ "' to '"
+ type.getName()
+ "'. No TransformRegistry available.");
}
QName fromType = JavaService.toMessageType(_content.getClass());
QName toType = JavaService.toMessageType(type);
Transformer transformer = _transformerRegistry.getTransformer(fromType, toType);
if (transformer == null) {
throw new SwitchYardException(
"Cannot convert from '"
+ _content.getClass().getName()
+ "' to '"
+ type.getName()
+ "'. No registered Transformer available for transforming from '"
+ fromType
+ "' to '"
+ toType
+ "'. A Transformer must be registered.");
}
Object transformedContent = transformer.transform(_content);
if (transformedContent == null) {
throw new SwitchYardException(
"Error converting from '"
+ _content.getClass().getName()
+ "' to '"
+ type.getName()
+ "'. Transformer '"
+ transformer.getClass().getName()
+ "' returned null.");
}
if (!type.isInstance(transformedContent)) {
throw new SwitchYardException(
"Error converting from '"
+ _content.getClass().getName()
+ "' to '"
+ type.getName()
+ "'. Transformer '"
+ transformer.getClass().getName()
+ "' returned incompatible type '"
+ transformedContent.getClass().getName()
+ "'.");
}
return type.cast(transformedContent);
}