/*
* Copyright 2004-2015 the Seasar Foundation and the Others.
*
* 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
*
* 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.
*/
package org.seasar.extension.dataset.impl;
import java.sql.Connection;
import java.sql.Statement;
import javax.sql.DataSource;
import org.seasar.extension.dataset.DataTable;
import org.seasar.extension.jdbc.impl.BasicSelectHandler;
import org.seasar.extension.jdbc.impl.ObjectResultSetHandler;
import org.seasar.extension.jdbc.util.ConnectionUtil;
import org.seasar.extension.jdbc.util.DataSourceUtil;
import org.seasar.framework.log.Logger;
import org.seasar.framework.util.StatementUtil;
/**
* SqlServer用の {@link SqlTableWriter}です。
*
* @author taedium
*
*/
public class SqlServerSqlTableWriter extends SqlTableWriter {
private static final Logger logger = Logger.getLogger(SqlTableWriter.class);
/**
* {@link SqlServerSqlTableWriter}を作成します。
*
* @param dataSource
* データソース
*/
public SqlServerSqlTableWriter(final DataSource dataSource) {
super(dataSource);
}
protected void doWrite(final DataTable dataTable) {
boolean hasIdentity = hasIdentityColumn(dataTable);
if (hasIdentity) {
turnOnIdentityInsert(dataTable);
}
super.doWrite(dataTable);
if (hasIdentity) {
turnOffIdentityInsert(dataTable);
}
}
private void turnOnIdentityInsert(final DataTable dataTable) {
setIdentityInsert(dataTable, "ON");
}
private void turnOffIdentityInsert(final DataTable dataTable) {
setIdentityInsert(dataTable, "OFF");
}
private void setIdentityInsert(final DataTable dataTable,
final String command) {
final String sql = "SET IDENTITY_INSERT " + dataTable.getTableName()
+ " " + command;
if (logger.isDebugEnabled()) {
logger.debug(sql);
}
final Connection connection = DataSourceUtil
.getConnection(getDataSource());
try {
final Statement statement = ConnectionUtil
.createStatement(connection);
try {
StatementUtil.execute(statement, sql);
} finally {
StatementUtil.close(statement);
}
} finally {
ConnectionUtil.close(connection);
}
}
private boolean hasIdentityColumn(final DataTable dataTable) {
final String sql = "SELECT IDENT_CURRENT ('" + dataTable.getTableName()
+ "') AS IDENT_CURRENT";
final BasicSelectHandler handler = new BasicSelectHandler(
getDataSource(), sql, new ObjectResultSetHandler());
return handler.execute(null) != null;
}
}