private ViewConfigurationModel fetchAssocDefViewConfig(Association assocDef) {
try {
// Note: othersTopicTypeUri=null, the view config's topic type is unknown (it is
// client-specific)
ResultSet<RelatedTopic> configTopics =
assocDef.getRelatedTopics(
"dm4.core.aggregation",
"dm4.core.assoc_def",
"dm4.core.view_config",
null,
true,
false,
0,
null);
return new ViewConfigurationModel(DeepaMehtaUtils.toTopicModels(configTopics.getItems()));
} catch (Exception e) {
throw new RuntimeException(
"Fetching view configuration for association definition " + assocDef.getId() + " failed",
e);
}
}
@Override
public Topic fetchPartType(Association assoc) {
Topic partTypeTopic = assoc.getTopic("dm4.core.part_type");
// error check
if (partTypeTopic == null) {
throw new RuntimeException(
"Invalid association definition: topic role dm4.core.part_type "
+ "is missing in "
+ assoc);
}
//
return partTypeTopic;
}
private AssociationDefinitionModel fetchAssociationDefinition(
Association assoc, String wholeTypeUri, String partTypeUri) {
try {
long assocId = assoc.getId();
return new AssociationDefinitionModel(
assocId,
assoc.getTypeUri(),
wholeTypeUri,
partTypeUri,
fetchWholeCardinality(assocId).getUri(),
fetchPartCardinality(assocId).getUri(),
fetchAssocDefViewConfig(assoc));
} catch (Exception e) {
throw new RuntimeException(
"Fetching association definition failed (wholeTypeUri=\""
+ wholeTypeUri
+ "\", partTypeUri="
+ partTypeUri
+ ", "
+ assoc
+ ")",
e);
}
}
@Override
public void writeTo(
Association assoc,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
OutputStream entityStream)
throws IOException, WebApplicationException {
try {
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(entityStream));
assoc.toJSON().write(writer);
writer.flush();
} catch (Exception e) {
throw new IOException("Writing message body failed (" + assoc + ")", e);
}
}