/*******************************************************************************
 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
 * in Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.db.tests.api.readGraph.forEachObject;

import java.util.concurrent.atomic.AtomicInteger;

import org.junit.Test;
import org.simantics.databoard.Bindings;
import org.simantics.db.AsyncReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.Session;
import org.simantics.db.WriteGraph;
import org.simantics.db.common.request.AsyncReadRequest;
import org.simantics.db.common.request.WriteResultRequest;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.procedure.AsyncMultiProcedure;
import org.simantics.db.testing.base.ExistingDatabaseTest;
import org.simantics.layer0.Layer0;
import org.simantics.utils.DataContainer;

public class ForEachObjectTest1 extends ExistingDatabaseTest {
	
	@Test
	public void test() throws Exception {
		
		Session session = getSession();
		
		try {

			final Layer0 L0 = Layer0.getInstance(session);
			
    		final Resource res = session.syncRequest(new WriteResultRequest<Resource>() {

    			@Override
    			public Resource perform(WriteGraph graph) throws DatabaseException {
    				
    				Resource part = graph.newResource();
    				graph.addLiteral(part, L0.HasName, L0.NameOf, L0.String, "A", Bindings.STRING);
    				graph.addLiteral(part, L0.HasName, L0.NameOf, L0.String, "B", Bindings.STRING);
    				return part;
    				
    			}
    			
    		});
    		
    		final AtomicInteger finished = new AtomicInteger(0);
    		final AtomicInteger execute = new AtomicInteger(0);
    		final AtomicInteger exception = new AtomicInteger(0);
    		final DataContainer<Throwable> throwable = new DataContainer<Throwable>();

    		session.syncRequest(new AsyncReadRequest() {

    			@Override
    			public void run(AsyncReadGraph graph) {

    				graph.forEachObject(res, L0.HasName, new AsyncMultiProcedure<Resource>() {

    					@Override
    					public void finished(AsyncReadGraph graph) {
    						finished.incrementAndGet();
    					}

    					@Override
    					public void execute(AsyncReadGraph graph, Resource result) {
    						execute.incrementAndGet();
    					}

    					@Override
    					public void exception(AsyncReadGraph graph, Throwable t) {
    						exception.incrementAndGet();
    						throwable.set(t);
    					}

    				});

    			}

    		});

    		if(finished.get() != 1) fail("finished was not 1");
    		if(execute.get() != 2) fail("execute was not 2 (was " + execute.get() + ")");
    		if(exception.get() != 0) fail("exception was not 0 (was " + exception.get() + ")");
    		if(throwable.get() != null) fail("there was a throwable");
 
		} catch(Throwable t) {

			fail("syncRequest threw unexpected throwable " + t);

		}

	}

}