/*******************************************************************************
 * 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.request.exception;

import java.util.ArrayList;
import java.util.Arrays;

import org.junit.Test;
import org.simantics.databoard.Bindings;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.Session;
import org.simantics.db.WriteGraph;
import org.simantics.db.common.request.ResourceRead;
import org.simantics.db.common.request.WriteRequest;
import org.simantics.db.common.request.WriteResultRequest;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.procedure.Listener;
import org.simantics.db.testing.base.ExistingDatabaseTest;
import org.simantics.layer0.Layer0;


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

		class R extends ResourceRead<Integer> {

			public R(Resource r) {
				super(r);
			}
			
			@Override
			public Integer perform(ReadGraph graph) throws DatabaseException {
				Layer0 b = Layer0.getInstance(graph);
				Integer i = graph.getPossibleRelatedValue(resource, b.HasProperty);
				if(i == 2) throw new DatabaseException("Exception2");
				if(i == 4) throw new DatabaseException("Exception45");
				if(i == 5) throw new DatabaseException("Exception45");
				return i;
			}
			
		}
		
		final Resource literal = session.syncRequest(new WriteResultRequest<Resource>() {

			@Override
			public Resource perform(WriteGraph graph) throws DatabaseException {
				
				Resource literal = graph.newResource();
				Layer0 b = Layer0.getInstance(graph);
				graph.claimLiteral(literal, b.HasProperty, 1, Bindings.INTEGER);
				return literal;
				
			}
			
		});
		
		final ArrayList<String> results = new ArrayList<String>();
		
		session.syncRequest(new R(literal), new Listener<Integer>() {

			@Override
			public void execute(Integer result) {
				results.add(result != null ? result.toString() : null);
			}

			@Override
			public void exception(Throwable t) {
				results.add(t.getMessage());
			}

			@Override
			public boolean isDisposed() {
				return false;
			}
			
		});
		
		class Claim extends WriteRequest {

			private Integer i;
			
			public Claim(Integer i) {
				this.i = i;
			}
			
			@Override
			public void perform(WriteGraph graph) throws DatabaseException {
			    Layer0 b = Layer0.getInstance(graph);
			    graph.claimLiteral(literal, b.HasProperty, i, Bindings.INTEGER);
			}
			
		}
		
		session.syncRequest(new Claim(2));
		session.syncRequest(new Claim(3));
		session.syncRequest(new Claim(4));
		session.syncRequest(new Claim(5));
		session.syncRequest(new Claim(6));
		
		String[] test = new String[] { "1", "Exception2", "3", "Exception45", "Exception45", "6" };
		
		assert(Arrays.equals(test, results.toArray(new String[results.size()])));
		
	}
	
}