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package org.apache.cayenne.merge;
import java.sql.Types;
import java.util.List;
import junit.framework.AssertionFailedError;
import org.apache.cayenne.DataObject;
import org.apache.cayenne.Persistent;
import org.apache.cayenne.access.DataContext;
import org.apache.cayenne.access.jdbc.ParameterBinding;
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.ObjAttribute;
import org.apache.cayenne.map.ObjEntity;
import org.apache.cayenne.query.SelectQuery;
public class ValueForNullTest extends MergeCase {
private static final String DEFAULT_VALUE_STRING = "DEFSTRING";
public void test() throws Exception {
DbEntity dbEntity = map.getDbEntity("PAINTING");
assertNotNull(dbEntity);
ObjEntity objEntity = map.getObjEntity("Painting");
assertNotNull(objEntity);
DataContext ctxt = createDataContext();
// insert some rows before adding "not null" column
final int nrows = 10;
for (int i = 0; i < nrows; i++) {
DataObject o = (DataObject) ctxt.newObject("Painting");
o.writeProperty("paintingTitle", "ptitle" + i);
}
ctxt.commitChanges();
// create and add new column to model and db
DbAttribute column = new DbAttribute("NEWCOL2", Types.VARCHAR, dbEntity);
column.setMandatory(false);
column.setMaxLength(10);
dbEntity.addAttribute(column);
assertTrue(dbEntity.getAttributes().contains(column));
assertEquals(column, dbEntity.getAttribute(column.getName()));
assertTokensAndExecute(node, map, 1, 0);
// need obj attr to be able to query
ObjAttribute objAttr = new ObjAttribute("newcol2");
objAttr.setDbAttributePath(column.getName());
objEntity.addAttribute(objAttr);
// check that is was merged
assertTokensAndExecute(node, map, 0, 0);
// set not null
column.setMandatory(true);
// merge to db
assertTokensAndExecute(node, map, 2, 0);
// check that is was merged
assertTokensAndExecute(node, map, 0, 0);
// check values for null
Expression qual = ExpressionFactory.matchExp(
objAttr.getName(),
DEFAULT_VALUE_STRING);
SelectQuery query = new SelectQuery("Painting", qual);
List<Persistent> rows = ctxt.performQuery(query);
assertEquals(nrows, rows.size());
// clean up
dbEntity.removeAttribute(column.getName());
assertTokensAndExecute(node, map, 1, 0);
assertTokensAndExecute(node, map, 0, 0);
}
@Override
protected DbMerger createMerger() {
DbMerger merger = super.createMerger();
merger.setValueForNullProvider(new DefaultValueForNullProvider() {
@Override
protected ParameterBinding get(DbEntity entity, DbAttribute column) {
int type = column.getType();
switch (type) {
case Types.VARCHAR:
return new ParameterBinding(DEFAULT_VALUE_STRING, type, -1);
default:
throw new AssertionFailedError("should not get here");
}
}
@Override
public boolean hasValueFor(DbEntity entity, DbAttribute column) {
return true;
}
});
return merger;
}
}