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Type parameter for LoadContext (add factory methods). #PL-5848

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This commit is contained in:
Konstantin Krivopustov 2015-08-23 10:43:38 +00:00
parent 4d3f58fad4
commit 20120c76a4
2 changed files with 41 additions and 22 deletions
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33
modules/core/test/com/haulmont/cuba/core/DataManagerTest.java
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@ -8,7 +8,7 @@ import com.haulmont.bali.db.QueryRunner;
import com.haulmont.cuba.core.entity.Entity;
import com.haulmont.cuba.core.entity.Server;
import com.haulmont.cuba.core.global.*;
import com.haulmont.cuba.security.entity.Group;
import com.haulmont.cuba.security.entity.User;
import java.util.Collections;
import java.util.List;
@ -34,8 +34,7 @@ public class DataManagerTest extends CubaTestCase {
dataManager.commit(new CommitContext(Collections.<Entity>singleton(server)));
final LoadContext<Server> loadContext = new LoadContext<>(Server.class);
loadContext.setId(id);
LoadContext<Server> loadContext = LoadContext.create(Server.class).setId(id);
server = dataManager.load(loadContext);
assertEquals("localhost", server.getName());
@ -52,8 +51,7 @@ public class DataManagerTest extends CubaTestCase {
dataManager.commit(new CommitContext(Collections.<Entity>singleton(server)));
final LoadContext<Server> loadContext = new LoadContext<>(Server.class);
loadContext.setId(id);
LoadContext<Server> loadContext = LoadContext.create(Server.class).setId(id);
server = dataManager.load(loadContext);
assertEquals("localhost", server.getName());
@ -66,8 +64,7 @@ public class DataManagerTest extends CubaTestCase {
dataManager.commit(new CommitContext(Collections.<Entity>singleton(server)));
final LoadContext loadContext =
new LoadContext(Server.class);
LoadContext<Server> loadContext = LoadContext.create(Server.class);
loadContext.setQueryString("select s from " + PersistenceHelper.getEntityName(Server.class) + " s");
List<Server> list = dataManager.loadList(loadContext);
@ -82,19 +79,18 @@ public class DataManagerTest extends CubaTestCase {
dataManager.commit(new CommitContext(Collections.<Entity>singleton(server)));
LoadContext loadContext = new LoadContext(Server.class);
loadContext.setId(id);
LoadContext<Server> loadContext = LoadContext.create(Server.class).setId(id);
List<Server> list = dataManager.loadList(loadContext);
assertTrue(list.size() == 1);
}
public void testAssociatedResult() throws Exception {
LoadContext loadContext = new LoadContext(Group.class);
LoadContext<User> loadContext = LoadContext.create(User.class);
loadContext.setQueryString("select u.group from sec$User u where u.id = :userId")
.setParameter("userId", UUID.fromString("60885987-1b61-4247-94c7-dff348347f93"));
List<Server> list = dataManager.loadList(loadContext);
List<User> list = dataManager.loadList(loadContext);
assertTrue(list.size() == 1);
}
@ -105,8 +101,7 @@ public class DataManagerTest extends CubaTestCase {
dataManager.commit(new CommitContext(Collections.<Entity>singleton(server)));
final LoadContext loadContext =
new LoadContext(Server.class);
LoadContext<Server> loadContext = LoadContext.create(Server.class);
loadContext.setQueryString("select s from sys$Server s where s.name like :name")
.setParameter("name", "(?i)%loc%host%");
@ -115,9 +110,8 @@ public class DataManagerTest extends CubaTestCase {
}
public void testUnexistingQueryParameters() throws Exception {
LoadContext loadContext = new LoadContext(Server.class);
loadContext.setQueryString("select u from sec$User u where u.login = :login")
.setParameter("name", "admin");
LoadContext<User> loadContext = LoadContext.create(User.class).setQuery(
LoadContext.createQuery("select u from sec$User u where u.login = :login").setParameter("name", "admin"));
try {
dataManager.loadList(loadContext);
@ -126,10 +120,9 @@ public class DataManagerTest extends CubaTestCase {
// ok
}
loadContext = new LoadContext(Server.class);
loadContext.setQueryString("select u from sec$User u where u.login = :login")
.setParameter("login", "admin");
List<Entity> list = dataManager.loadList(loadContext);
loadContext = LoadContext.create(User.class).setQuery(
LoadContext.createQuery("select u from sec$User u where u.login = :login").setParameter("login", "admin"));
List<User> list = dataManager.loadList(loadContext);
assertEquals(1, list.size());
}
}

30
modules/global/src/com/haulmont/cuba/core/global/LoadContext.java
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@ -11,8 +11,16 @@ import java.io.Serializable;
import java.util.*;
/**
* Class that defines parameters for loading entities from the database.
* <p>Used by {@link DataManager}.</p>
* Class that defines parameters for loading entities from the database via {@link DataManager}.
* <p>Typical usage:
* <pre>
LoadContext&lt;User&gt; context = LoadContext.create(User.class).setQuery(
LoadContext.createQuery("select u from sec$User u where u.login like :login")
.setParameter("login", "a%")
.setMaxResults(10))
.setView("user.browse");
List&lt;User&gt; users = dataManager.loadList(context);
* </pre>
*
* @author krivopustov
* @version $Id$
@ -31,6 +39,24 @@ public class LoadContext<E extends Entity> implements Serializable {
protected Map<String, Object> dbHints = new HashMap<>();
protected boolean loadDynamicAttributes;
/**
* Factory method to create a LoadContext instance.
*
* @param entityClass class of the loaded entities
*/
public static <E extends Entity> LoadContext<E> create(Class<E> entityClass) {
return new LoadContext<E>(entityClass);
}
/**
* Factory method to create a LoadContext.Query instance for passing into {@link #setQuery(Query)} method.
*
* @param queryString JPQL query string. Only named parameters are supported.
*/
public static LoadContext.Query createQuery(String queryString) {
return new LoadContext.Query(queryString);
}
/**
* @param metaClass metaclass of the loaded entities
*/