Package com.onec.query

Class QueryEngine

java.lang.Object

com.onec.query.QueryEngine

public final class QueryEngine
extends Object

Compiles a QuerySpec to SQL via the JoinWalker (ref-navigation joins) and the shared SqlRenderer, then runs it through JDBI. This is the unified, type-safe query entry point over catalogs, documents, and registers; from(java.lang.Class<T>) starts a fluent QueryBuilder.

Constructor Summary

Constructors

Constructor	Description
QueryEngine(org.jdbi.v3.core.Jdbi jdbi, MetadataRegistry registry)

Method Summary

Modifier and Type	Method	Description
List<Row>	fetch(QuerySpec spec)	Run a spec and return untyped projection rows.
<D> List<D>	fetchInto(QuerySpec spec, Class<D> dtoType)	Run a spec and map each row onto dtoType (record or POJO).
<T> QueryBuilder<T>	from(Class<T> entity)	Start building a query over entity (catalog, document, or register class).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

QueryEngine

public QueryEngine(org.jdbi.v3.core.Jdbi jdbi,
 MetadataRegistry registry)

Method Details

from

public <T> QueryBuilder<T> from(Class<T> entity)

Start building a query over entity (catalog, document, or register class).

fetch

public List<Row> fetch(QuerySpec spec)

Run a spec and return untyped projection rows.

fetchInto

public <D> List<D> fetchInto(QuerySpec spec,
 Class<D> dtoType)

Run a spec and map each row onto dtoType (record or POJO).