private String toDescription(Transformer<?, ?> transformer) {
return transformer.getClass().getName()
+ "("
+ transformer.getFrom()
+ ", "
+ transformer.getTo()
+ ")";
}
@Test
public void test_transform_anno_types_defined() {
org.switchyard.transform.Transformer transformer =
TransformerUtil.newTransformer(
TestTransformer.class, QName.valueOf("X"), QName.valueOf("Y"));
Assert.assertTrue(!(transformer instanceof TestTransformer));
Assert.assertEquals("Y", transformer.transform("X"));
}
@Test
public void test_transform_anno_no_types_defined() {
org.switchyard.transform.Transformer transformer =
TransformerUtil.newTransformer(
TestTransformer.class,
JavaService.toMessageType(B.class),
JavaService.toMessageType(A.class));
Assert.assertTrue(!(transformer instanceof TestTransformer));
Assert.assertTrue(transformer.transform(new B()) instanceof A);
}
@Test
public void test_transform_interface_impl() {
org.switchyard.transform.Transformer transformer =
TransformerUtil.newTransformer(
TestTransformer.class,
JavaService.toMessageType(A.class),
JavaService.toMessageType(B.class));
Assert.assertTrue(transformer instanceof TestTransformer);
Assert.assertTrue(transformer.transform(new A()) instanceof B);
}
/**
* Register a set of transformers in the transform registry associated with this deployment.
*
* @param transforms The transforms model.
* @param failOnError false to eat duplicate exceptions
* @throws DuplicateTransformerException an existing transformer has already been registered for
* the from and to types
*/
public void registerTransformers(TransformsModel transforms, boolean failOnError)
throws DuplicateTransformerException {
if (transforms == null) {
return;
}
try {
for (TransformModel transformModel : transforms.getTransforms()) {
Collection<Transformer<?, ?>> transformers = newTransformers(transformModel);
transformerLoop:
for (Transformer<?, ?> transformer : transformers) {
if (_transformerRegistry.hasTransformer(transformer.getFrom(), transformer.getTo())) {
Transformer<?, ?> registeredTransformer =
_transformerRegistry.getTransformer(transformer.getFrom(), transformer.getTo());
boolean test = false;
testLoop:
for (StackTraceElement ste : Thread.currentThread().getStackTrace()) {
if (ste.getClassName().startsWith("org.switchyard.test.")) {
test = true;
break testLoop;
}
}
String msg =
"Failed to register Transformer '"
+ toDescription(transformer)
+ "'. A Transformer for these types is already registered: '"
+ toDescription(registeredTransformer)
+ "'.";
if (test) {
_log.trace(msg);
} else if (failOnError) {
throw new DuplicateTransformerException(msg);
} else {
_log.debug(msg);
}
continue transformerLoop;
}
_log.debug(
"Adding transformer =>"
+ " From: "
+ transformer.getFrom()
+ ", To:"
+ transformer.getTo());
_transformerRegistry.addTransformer(transformer);
_transformers.add(transformer);
}
}
} catch (DuplicateTransformerException e) {
throw e;
} catch (RuntimeException e) {
// If there was an exception for any reason... remove all Transformer instance that have
// already been registered with the domain...
unregisterTransformers();
throw e;
}
}
@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);
}
@Override
public BaseTransformerRegistry addTransformer(Transformer<?, ?> transformer) {
_fallbackTransformers.clear();
_transformers.put(new NameKey(transformer.getFrom(), transformer.getTo()), transformer);
return this;
}
@Override
public boolean removeTransformer(Transformer<?, ?> transformer) {
_fallbackTransformers.clear();
return _transformers.remove(new NameKey(transformer.getFrom(), transformer.getTo())) != null;
}