spring-batch ColumnMapItemPreparedStatementSetter 源码

  • 2022-08-16
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spring-batch ColumnMapItemPreparedStatementSetter 代码

文件路径:/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/ColumnMapItemPreparedStatementSetter.java

/*
 * Copyright 2006-2007 the original author or authors.
 *
 * Licensed 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
 *
 *      https://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.
 */

package org.springframework.batch.item.database.support;

import org.springframework.batch.item.database.ItemPreparedStatementSetter;
import org.springframework.jdbc.core.ColumnMapRowMapper;
import org.springframework.jdbc.core.SqlTypeValue;
import org.springframework.jdbc.core.StatementCreatorUtils;
import org.springframework.util.Assert;

import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Map;

/**
 * <p>
 * Implementation of the {@link ItemPreparedStatementSetter} interface that assumes all
 * keys are contained within a {@link Map} with the column name as the key. It assumes
 * nothing about ordering, and assumes that the order the entry set can be iterated over
 * is the same as the PreparedStatement should be set.
 * </p>
 *
 * @author Lucas Ward
 * @author Dave Syer
 * @see ItemPreparedStatementSetter
 * @see ColumnMapRowMapper
 */
public class ColumnMapItemPreparedStatementSetter implements ItemPreparedStatementSetter<Map<String, Object>> {

	@Override
	public void setValues(Map<String, Object> item, PreparedStatement ps) throws SQLException {
		Assert.isInstanceOf(Map.class, item, "Input to map PreparedStatement parameters must be of type Map.");
		int counter = 1;
		for (Object value : item.values()) {
			StatementCreatorUtils.setParameterValue(ps, counter, SqlTypeValue.TYPE_UNKNOWN, value);
			counter++;
		}
	}

}

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