com.github.jmnarloch.hstreams.Demo.java Source code

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Here is the source code for com.github.jmnarloch.hstreams.Demo.java

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/**
 * Copyright (c) 2015 HStreams contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.jmnarloch.hstreams;

import com.github.jmnarloch.hstreams.model.User;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.junit.Test;

import java.util.ArrayList;
import java.util.Optional;

import static org.mockito.Matchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

/**
 * Demonstrates the usage of this component.
 *
 * @author Jakub Narloch
 */
public class Demo {

    /**
     * The API usage demo.
     */
    @Test
    public void demo() {

        SessionFactory originalFactory = sessionFactory();

        StreamSessionFactory factory = Streams.wrap(originalFactory);
        StreamSession session = factory.getCurrentSession();

        long count = session.createQuery("from User").stream().count();

        Optional<?> user1 = session.createTypedQuery("from User where id = :id", User.class).setParameter("id", 1l)
                .optionalResult();

        Optional<User> user2 = session.createTypedQuery("from User where id = :id", User.class)
                .setParameter("id", 1l).stream().findFirst();

        Optional<User> user3 = session.getOptional("User", 1l);
    }

    private SessionFactory sessionFactory() {
        SessionFactory sessionFactory = mock(SessionFactory.class);
        Session session = mock(Session.class);
        Query query = mock(Query.class);

        when(sessionFactory.getCurrentSession()).thenReturn(session);
        when(session.createQuery(any())).thenReturn(query);
        when(session.get(any(String.class), any(Long.class))).thenReturn(new Object());

        when(query.setParameter(any(), any())).thenReturn(query);
        when(query.list()).thenReturn(new ArrayList());
        when(query.uniqueResult()).thenReturn(new Object());

        return sessionFactory;
    }
}