Github user rmetzger commented on a diff in the pull request:
https://github.com/apache/incubator-flink/pull/236#discussion_r20934292
--- Diff:
flink-java/src/main/java/org/apache/flink/api/java/typeutils/runtime/PojoSerializer.java
---
@@ -195,22 +289,44 @@ public void serialize(T value, DataOutputView target)
throws IOException {
throw new RuntimeException("Error during POJO copy,
this should not happen since we check the fields" +
"before.");
}
+
+ // Serialize subclass fields as well.
+ if (!(clazz == value.getClass())) {
+ Class<?> subclass = value.getClass();
+ TypeSerializer subclassSerializer =
getSubclassSerializer(subclass);
+ subclassSerializer.serialize(value, target);
+ }
}
@Override
+ @SuppressWarnings("unchecked")
public T deserialize(DataInputView source) throws IOException {
boolean isNull = source.readBoolean();
if(isNull) {
return null;
}
+
T target;
- try {
- target = clazz.newInstance();
- }
- catch (Throwable t) {
- throw new RuntimeException("Cannot instantiate class.",
t);
+
+ Class<?> subclass = null;
+ TypeSerializer subclassSerializer = null;
+
+ boolean isExactClass = source.readBoolean();
+ if (!isExactClass) {
+ String subclassName = source.readUTF();
+ try {
+ subclass = Class.forName(subclassName, true,
this.getClass().getClassLoader());
+ } catch (ClassNotFoundException e) {
+ throw new RuntimeException("Cannot instantiate
class.", e);
+ }
+ subclassSerializer = getSubclassSerializer(subclass);
+ target = (T) subclassSerializer.createInstance();
+ // also initialize fields for which the subclass
serializer is not responsible
+ initializeFields(target);
+ } else {
+ target = createInstance();
--- End diff --
you are swallowing instantiation exceptions here
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