/**
* INTERNAL: Return the value to be stored in the object's attribute. This value is determined by
* the batchQuery. In this case, extract the result from the query.
*/
public Object valueFromBatchQuery(
ReadQuery batchQuery,
AbstractRecord row,
ObjectLevelReadQuery originalQuery,
CacheKey parentCacheKey) {
return getForeignReferenceMapping()
.extractResultFromBatchQuery(
batchQuery, parentCacheKey, row, originalQuery.getSession(), originalQuery);
}
/**
* Initialize the query-based value holder.
*
* @param query The query that returns the object when executed.
* @param row The row representation of the object.
* @param mapping The mapping that is uses batch reading.
*/
public BatchValueHolder(
ReadQuery query,
AbstractRecord row,
ForeignReferenceMapping mapping,
ObjectLevelReadQuery originalQuery,
CacheKey parentCacheKey) {
super(query, row, originalQuery.getSession());
this.mapping = mapping;
this.originalQuery = originalQuery;
this.parentCacheKey = parentCacheKey;
}
/**
* INTERNAL: Prepare the query from the prepared query. This allows a dynamic query to prepare
* itself directly from a prepared query instance. This is used in the JPQL parse cache to allow
* preparsed queries to be used to prepare dynamic queries. This only copies over properties that
* are configured through JPQL.
*/
public void prepareFromQuery(DatabaseQuery query) {
super.prepareFromQuery(query);
if (query.isReadAllQuery()) {
ReadAllQuery readQuery = (ReadAllQuery) query;
this.containerPolicy = readQuery.containerPolicy;
if (readQuery.hasHierarchicalExpressions()) {
this.orderSiblingsByExpressions = readQuery.getOrderSiblingsByExpressions();
this.connectByExpression = readQuery.getConnectByExpression();
this.startWithExpression = readQuery.getStartWithExpression();
}
if (readQuery.hasBatchReadAttributes()) {
this.batchReadAttributeExpressions = readQuery.batchReadAttributeExpressions;
this.batchReadMappingQueries = readQuery.batchReadMappingQueries;
this.batchReadAttributes = readQuery.batchReadAttributes;
}
}
}
/** INTERNAL: Prepare the receiver for execution in a session. */
protected void prepare() throws QueryException {
if ((!isReportQuery()) && prepareFromCachedQuery()) {
return;
}
super.prepare();
getContainerPolicy().prepare(this, getSession());
if (getContainerPolicy().overridesRead()) {
return;
}
if (getDescriptor().isDescriptorForInterface()) {
return;
}
prepareSelectAllRows();
computeBatchReadMappingQueries();
}
/** INTERNAL: Prepare the receiver for execution in a session. */
public void prepareForExecution() throws QueryException {
super.prepareForExecution();
getContainerPolicy().prepareForExecution();
}