Bug 205400 error displaying parameter in a table
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/validators/DataColumnNameValidator.java
*  Actuate Corporation  - initial API and implementation
 *******************************************************************************/
package org.eclipse.birt.report.model.api.validators;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.eclipse.birt.report.model.api.elements.SemanticError;
import org.eclipse.birt.report.model.api.elements.structures.ComputedColumn;
import org.eclipse.birt.report.model.core.DesignElement;
import org.eclipse.birt.report.model.core.Module;
import org.eclipse.birt.report.model.elements.DataItem;
import org.eclipse.birt.report.model.elements.GroupElement;
import org.eclipse.birt.report.model.elements.interfaces.IDataItemModel;
import org.eclipse.birt.report.model.elements.interfaces.IReportItemModel;
import org.eclipse.birt.report.model.util.BoundDataColumnUtil;
import org.eclipse.birt.report.model.validators.AbstractElementValidator;
/**
 * Validates the result set column of the data item.
 * 
 * <h3>Rule</h3>
 * The rule is that
 * <ul>
 * <li>If data item has a column name and this column name has no corresponding
 * column binding, semantic error is logged.
 * </ul>
 * 
 * <h3>Applicability</h3>
 * This validator is only applied to <code>DataItem</code>.
 */
public class DataColumnNameValidator extends AbstractElementValidator