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 *   Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
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package org.apache.cayenne.dba.hsqldb;

import org.apache.cayenne.access.translator.select.DefaultSelectTranslator;
import org.apache.cayenne.dba.DbAdapter;
import org.apache.cayenne.map.EntityResolver;
import org.apache.cayenne.query.Query;

/**
 * @since 1.2
 */
class HSQLSelectTranslator extends DefaultSelectTranslator {

	/**
	 * @since 4.0
	 */
	public HSQLSelectTranslator(Query query, DbAdapter adapter, EntityResolver entityResolver) {
		super(query, adapter, entityResolver);
	}

	@Override
	protected void appendLimitAndOffsetClauses(StringBuilder buffer) {
		int offset = queryMetadata.getFetchOffset();
		int limit = queryMetadata.getFetchLimit();

		if (offset > 0 || limit > 0) {
			buffer.append(" LIMIT ");

			// both OFFSET and LIMIT must be present, so come up with defaults
			// if one of
			// them is not set by the user
			if (limit == 0) {
				limit = Integer.MAX_VALUE;
			}

			buffer.append(limit).append(" OFFSET ").append(offset);
		}
	}
}