001/*
002 * Copyright 2002-2016 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.jdbc.object;
018
019import java.util.Map;
020
021import org.springframework.beans.BeanUtils;
022import org.springframework.jdbc.core.RowMapper;
023import org.springframework.util.Assert;
024
025/**
026 * A concrete variant of {@link SqlQuery} which can be configured
027 * with a {@link RowMapper}.
028 *
029 * @author Thomas Risberg
030 * @author Juergen Hoeller
031 * @since 3.0
032 * @see #setRowMapper
033 * @see #setRowMapperClass
034 */
035public class GenericSqlQuery<T> extends SqlQuery<T> {
036
037        private RowMapper<T> rowMapper;
038
039        @SuppressWarnings("rawtypes")
040        private Class<? extends RowMapper> rowMapperClass;
041
042
043        /**
044         * Set a specific {@link RowMapper} instance to use for this query.
045         * @since 4.3.2
046         */
047        public void setRowMapper(RowMapper<T> rowMapper) {
048                this.rowMapper = rowMapper;
049        }
050
051        /**
052         * Set a {@link RowMapper} class for this query, creating a fresh
053         * {@link RowMapper} instance per execution.
054         */
055        @SuppressWarnings("rawtypes")
056        public void setRowMapperClass(Class<? extends RowMapper> rowMapperClass) {
057                this.rowMapperClass = rowMapperClass;
058        }
059
060        @Override
061        public void afterPropertiesSet() {
062                super.afterPropertiesSet();
063                Assert.isTrue(this.rowMapper != null || this.rowMapperClass != null,
064                                "'rowMapper' or 'rowMapperClass' is required");
065        }
066
067
068        @Override
069        @SuppressWarnings("unchecked")
070        protected RowMapper<T> newRowMapper(Object[] parameters, Map<?, ?> context) {
071                return (this.rowMapper != null ? this.rowMapper : BeanUtils.instantiateClass(this.rowMapperClass));
072        }
073
074}