ASTDbPathIT.java

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package org.apache.cayenne.exp.parser;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import org.apache.cayenne.Cayenne;
import org.apache.cayenne.ObjectContext;
import org.apache.cayenne.di.Inject;
import org.apache.cayenne.exp.Expression;
import org.apache.cayenne.exp.ExpressionFactory;
import org.apache.cayenne.map.DbAttribute;
import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.map.ObjEntity;
import org.apache.cayenne.testdo.testmap.Artist;
import org.apache.cayenne.testdo.testmap.Painting;
import org.apache.cayenne.unit.di.server.CayenneProjects;
import org.apache.cayenne.unit.di.server.ServerCase;
import org.apache.cayenne.unit.di.server.UseServerRuntime;
import org.junit.Test;

@UseServerRuntime(CayenneProjects.TESTMAP_PROJECT)
public class ASTDbPathIT extends ServerCase {

	@Inject
	private ObjectContext context;

	@Test
	public void testEvaluate_DataObject() {

		Artist a1 = context.newObject(Artist.class);
		a1.setArtistName("a1");
		context.commitChanges();

		Expression idExp = ExpressionFactory.exp("db:ARTIST_ID");
		assertEquals(Cayenne.longPKForObject(a1), idExp.evaluate(a1));

		Expression columnExp = ExpressionFactory.exp("db:ARTIST_NAME");
		assertEquals("a1", columnExp.evaluate(a1));
	}

	@Test
	public void testEvaluate_DbEntity() {
		Expression e = ExpressionFactory.exp("db:paintingArray.PAINTING_TITLE");

		ObjEntity ae = context.getEntityResolver().getObjEntity(Artist.class);
		DbEntity ade = ae.getDbEntity();

		Object objTarget = e.evaluate(ae);
		assertTrue(objTarget instanceof DbAttribute);

		Object dbTarget = e.evaluate(ade);
		assertTrue(dbTarget instanceof DbAttribute);
	}

	@Test
	public void testEvaluate_Related_DataObject() {

		Artist a1 = context.newObject(Artist.class);
		Artist a2 = context.newObject(Artist.class);
		Painting p1 = context.newObject(Painting.class);
		Painting p2 = context.newObject(Painting.class);
		Painting p3 = context.newObject(Painting.class);

		a1.setArtistName("a1");
		a2.setArtistName("a2");
		p1.setPaintingTitle("p1");
		p2.setPaintingTitle("p2");
		p3.setPaintingTitle("p3");

		p1.setToArtist(a1);
		p2.setToArtist(a2);

		context.commitChanges();

		Expression attributeOnlyPath = new ASTDbPath("PAINTING_TITLE");
		Expression singleStepPath = new ASTDbPath("toArtist.ARTIST_NAME");
		Expression multiStepPath = new ASTDbPath("toArtist.paintingArray.PAINTING_TITLE");

		// attribute only path
		assertEquals(p1.getPaintingTitle(), attributeOnlyPath.evaluate(p1));
		assertEquals(p2.getPaintingTitle(), attributeOnlyPath.evaluate(p2));

		// attribute only path - not in cache
		p1.getObjectContext().invalidateObjects(p1, p2);
		assertEquals(p1.getPaintingTitle(), attributeOnlyPath.evaluate(p1));
		assertEquals(p2.getPaintingTitle(), attributeOnlyPath.evaluate(p2));

		// single step relationship path
		assertEquals(a1.getArtistName(), singleStepPath.evaluate(p1));
		assertEquals(a2.getArtistName(), singleStepPath.evaluate(p2));
		assertNull(singleStepPath.evaluate(p3));

		assertEquals(p1.getPaintingTitle(), multiStepPath.evaluate(p1));
		assertEquals(p2.getPaintingTitle(), multiStepPath.evaluate(p2));
	}
}