org.eobjects.metamodel.jdbc.dialects.HsqldbQueryRewriter Maven / Gradle / Ivy

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/**
 * 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.jdbc.dialects;

import org.eobjects.metamodel.jdbc.JdbcDataContext;
import org.eobjects.metamodel.query.FilterItem;
import org.eobjects.metamodel.schema.Column;
import org.eobjects.metamodel.schema.ColumnType;

/**
 * Query rewriter for HSQLDB
 */
public class HsqldbQueryRewriter extends DefaultQueryRewriter {

	public HsqldbQueryRewriter(JdbcDataContext dataContext) {
		super(dataContext);
	}

	@Override
	public String rewriteFilterItem(FilterItem item) {
		if (!item.isCompoundFilter()) {
			Column column = item.getSelectItem().getColumn();
			if (column != null) {
				if (column.getType() == ColumnType.TIMESTAMP) {
					// HSQLDB does not treat (TIMESTAMP 'yyyy-MM-dd hh:mm:ss')
					// tokens correctly
					String result = super.rewriteFilterItem(item);
					int indexOfTimestamp = result.lastIndexOf("TIMESTAMP");
					if (indexOfTimestamp != -1) {
						result = result.substring(0, indexOfTimestamp)
								+ result.substring(indexOfTimestamp + "TIMESTAMP".length());
					}
					return result;
				}
			}
		}
		return super.rewriteFilterItem(item);
	}

}