ExpressionOrderTest.java

/*
 * This program is free software; you can redistribute it and/or modify it under the
 *  terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 *  Foundation.
 *
 *  You should have received a copy of the GNU Lesser General Public License along with this
 *  program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 *  or from the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 *  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.
 *
 *  Copyright (c) 2006 - 2015 Pentaho Corporation..  All rights reserved.
 */

package org.pentaho.reporting.engine.classic.core.bugs;

import javax.swing.table.DefaultTableModel;

import org.junit.Before;
import org.junit.Test;
import org.pentaho.reporting.engine.classic.core.ClassicEngineBoot;
import org.pentaho.reporting.engine.classic.core.MasterReport;
import org.pentaho.reporting.engine.classic.core.TableDataFactory;
import org.pentaho.reporting.engine.classic.core.function.AbstractExpression;
import org.pentaho.reporting.engine.classic.core.function.EventMonitorFunction;
import org.pentaho.reporting.engine.classic.core.function.Expression;
import org.pentaho.reporting.engine.classic.core.function.ItemCountFunction;
import org.pentaho.reporting.engine.classic.core.testsupport.DebugReportRunner;
import org.pentaho.reporting.libraries.base.util.DebugLog;

public class ExpressionOrderTest {
  @Before
  public void setUp() throws Exception {
    ClassicEngineBoot.getInstance().start();
  }

  @Test
  public void testExpressionOrder() throws Exception {
    MasterReport r = new MasterReport();
    r.setDataFactory( new TableDataFactory( "query", new DefaultTableModel( 4, 1 ) ) );
    r.setQuery( "query" );
    r.addExpression( new EventMonitorFunction(  ) );
    r.addExpression( new ItemCountFunction( "rc" ) {
      public Object getValue() {
        Object value = super.getValue();
        DebugLog.log( "ItemCount: " + value );
        return value;
      }
    } );
    r.addExpression( createRef( "e2", "e1" ) );
    r.addExpression( createRef( "e1", "rc" ) );

    DebugReportRunner.createCSV( r );
  }

  private Expression createRef(final String name, final String field) {

    Expression e = new AbstractExpression() {
      public Object getValue() {
        Object value = getDataRow().get( field );
        DebugLog.log( getName() + ": Lookup "  + field + "; returning => " + value);
        return value;
      }
    };
    e.setName( name );
    return e;
  }
}