本文整理匯總了Java中org.apache.avro.reflect.Union類的典型用法代碼示例。如果您正苦於以下問題：Java Union類的具體用法？Java Union怎麽用？Java Union使用的例子？那麽, 這裏精選的類代碼示例或許可以為您提供幫助。
Union類屬於org.apache.avro.reflect包，在下文中一共展示了Union類的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: checkUnion
import org.apache.avro.reflect.Union; //導入依賴的package包/類
private void checkUnion(String context, TypeDescriptor<?> type, Schema schema) {
final List<Schema> unionTypes = schema.getTypes();
if (!type.getRawType().isAnnotationPresent(Union.class)) {
// First check for @Nullable field, which shows up as a union of field type and null.
if (unionTypes.size() == 2 && unionTypes.contains(AVRO_NULL_SCHEMA)) {
// Find the Schema that is not NULL and recursively check that it is deterministic.
Schema nullableFieldSchema = unionTypes.get(0).equals(AVRO_NULL_SCHEMA)
? unionTypes.get(1) : unionTypes.get(0);
doCheck(context, type, nullableFieldSchema);
return;
}
// Otherwise report a schema error.
reportError(context, "Expected type %s to have @Union annotation", type);
return;
}
// Errors associated with this union will use the base class as their context.
String baseClassContext = type.getRawType().getName();
// For a union, we need to make sure that each possible instantiation is deterministic.
for (Schema concrete : unionTypes) {
@SuppressWarnings("unchecked")
TypeDescriptor<?> unionType = TypeDescriptor.of(ReflectData.get().getClass(concrete));
recurse(baseClassContext, unionType, concrete);
}
}