/**
* Convenience method to get all objects of the candidate type (and optional subclasses) from the
* specified connection.
*
* @param ec Execution Context
* @param mconn Managed Connection
* @param candidateClass Candidate
* @param subclasses Include subclasses?
* @param ignoreCache Whether to ignore the cache
* @param fetchPlan Fetch Plan
* @param filter Optional filter for the candidates
* @return List of objects of the candidate type (or subclass)
*/
static List getObjectsOfCandidateType(
final ExecutionContext ec,
final HBaseManagedConnection mconn,
Class candidateClass,
boolean subclasses,
boolean ignoreCache,
FetchPlan fetchPlan,
Filter filter,
StoreManager storeMgr) {
List<AbstractClassMetaData> cmds =
MetaDataUtils.getMetaDataForCandidates(candidateClass, subclasses, ec);
if (NucleusLogger.DATASTORE_NATIVE.isDebugEnabled()) {
NucleusLogger.DATASTORE_NATIVE.debug(
"Retrieving objects for candidate="
+ candidateClass.getName()
+ (subclasses ? " and subclasses" : "")
+ (filter != null ? (" with filter=" + filter) : ""));
}
Iterator<AbstractClassMetaData> cmdIter = cmds.iterator();
List results = new ArrayList();
while (cmdIter.hasNext()) {
results.addAll(
getObjectsOfType(ec, mconn, cmdIter.next(), ignoreCache, fetchPlan, filter, storeMgr));
}
return results;
}
/**
* Accessor for the name of the java-type actually used when mapping the particular datastore
* field. This java-type must have an entry in the datastore mappings.
*
* @param index requested datastore field index.
* @return the name of java-type for the requested datastore field.
*/
public String getJavaTypeForDatastoreMapping(int index) {
if (datastoreMappings == null || datastoreMappings.length == 0) {
// Not got mappings yet so use column metadata to define
ColumnMetaData[] colmds = getColumnMetaDataForMember(mmd, roleForMember);
boolean useString = false;
if (colmds != null && colmds.length > 0 && colmds[0].getJdbcType() != null) {
if (MetaDataUtils.isJdbcTypeString(colmds[0].getJdbcType())) {
useString = true;
}
}
return (useString ? ClassNameConstants.JAVA_LANG_STRING : ClassNameConstants.JAVA_SQL_TIME);
} else if (datastoreMappings[0].isStringBased()) {
// Use String as our java type
return ClassNameConstants.JAVA_LANG_STRING;
} else {
return ClassNameConstants.JAVA_SQL_TIME;
}
}
/* (non-Javadoc)
* @see org.datanucleus.store.fieldmanager.AbstractFieldManager#fetchObjectField(int)
*/
@Override
public Object fetchObjectField(int fieldNumber) {
ClassLoaderResolver clr = ec.getClassLoaderResolver();
AbstractMemberMetaData mmd = cmd.getMetaDataForManagedMemberAtAbsolutePosition(fieldNumber);
RelationType relationType = mmd.getRelationType(clr);
EmbeddedMetaData embmd = mmds.get(0).getEmbeddedMetaData();
if (mmds.size() == 1
&& embmd != null
&& embmd.getOwnerMember() != null
&& embmd.getOwnerMember().equals(mmd.getName())) {
// Special case of this being a link back to the owner. TODO Repeat this for nested and their
// owners
ObjectProvider[] ownerOps = ec.getOwnersForEmbeddedObjectProvider(op);
return (ownerOps != null && ownerOps.length > 0 ? ownerOps[0].getObject() : null);
}
if (relationType != RelationType.NONE
&& MetaDataUtils.getInstance()
.isMemberEmbedded(ec.getMetaDataManager(), clr, mmd, relationType, null)) {
// Embedded field
if (RelationType.isRelationSingleValued(relationType)) {
// TODO Cater for null value detection
List<AbstractMemberMetaData> embMmds = new ArrayList<AbstractMemberMetaData>(mmds);
embMmds.add(mmd);
AbstractClassMetaData embCmd =
ec.getMetaDataManager().getMetaDataForClass(mmd.getType(), clr);
ObjectProvider embOP =
ec.getNucleusContext()
.getObjectProviderFactory()
.newForEmbedded(ec, embCmd, op, fieldNumber);
FieldManager ffm = new FetchEmbeddedFieldManager(embOP, result, embMmds, table);
embOP.replaceFields(embCmd.getAllMemberPositions(), ffm);
return embOP.getObject();
}
}
return fetchNonEmbeddedObjectField(mmd, relationType, clr);
}
