org.eobjects.metamodel.CompositeQueryDelegate Maven / Gradle / Ivy
/**
* eobjects.org MetaModel
* Copyright (C) 2010 eobjects.org
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.eobjects.metamodel;
import org.eobjects.metamodel.data.DataSet;
import org.eobjects.metamodel.query.Query;
import org.eobjects.metamodel.schema.Column;
import org.eobjects.metamodel.schema.Table;
import org.eobjects.metamodel.util.Func;
final class CompositeQueryDelegate extends QueryPostprocessDelegate {
private final Func _dataContextRetrievalFunction;
public CompositeQueryDelegate(
Func dataContextRetrievalFunction) {
_dataContextRetrievalFunction = dataContextRetrievalFunction;
}
@Override
protected DataSet materializeMainSchemaTable(Table table, Column[] columns,
int maxRows) {
// find the appropriate datacontext to execute a simple
// table materialization query
DataContext dc = _dataContextRetrievalFunction.eval(table);
Query q = new Query().select(columns).from(table);
if (maxRows >= 0) {
q.setMaxRows(maxRows);
}
return dc.executeQuery(q);
}
}