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#region Copyright
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#endregion
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using System;
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using System.Collections;
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using System.Data;
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using System.Text;
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using Seasar.Extension.ADO;
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using Seasar.Extension.ADO.Impl;
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using Seasar.Extension.ADO.Types;
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using Seasar.Framework.Util;
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namespace Seasar.Extension.DataSets.Impl
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{
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public class SqlReloadTableReader : ITableReader
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{
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private IDataSource dataSource_;
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private DataTable table_;
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private string sql_;
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private string[] primaryKeys_;
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public SqlReloadTableReader(IDataSource dataSource, DataTable table)
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{
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dataSource_ = dataSource;
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table_ = table;
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IDbConnection con = DataSourceUtil.GetConnection(dataSource);
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try
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{
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IDatabaseMetaData dbMetaData = new DatabaseMetaDataImpl(DataSource);
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DataTableUtil.SetupMetaData(dbMetaData, table);
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}
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finally
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{
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DataSourceUtil.CloseConnection(dataSource, con);
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}
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SetUp();
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}
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private void SetUp()
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{
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StringBuilder buf = new StringBuilder(100);
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buf.Append("SELECT ");
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StringBuilder whereBuf = new StringBuilder(100);
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whereBuf.Append(" WHERE");
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ArrayList primaryKeyList = new ArrayList();
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foreach (DataColumn column in table_.Columns)
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{
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buf.Append(column.ColumnName);
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buf.Append(", ");
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if (DataTableUtil.IsPrimaryKey(table_, column))
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{
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whereBuf.AppendFormat(" {0} = @{1} AND", column.ColumnName, column.ColumnName);
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primaryKeyList.Add(column.ColumnName);
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}
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}
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buf.Length -= 2;
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whereBuf.Length -= 4;
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buf.Append(" FROM ");
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buf.Append(table_.TableName);
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buf.Append(whereBuf);
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sql_ = buf.ToString();
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primaryKeys_ = (string[]) primaryKeyList.ToArray(typeof(string));
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}
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public IDataSource DataSource
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{
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get { return dataSource_; }
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}
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public DataTable Table
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{
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get { return table_; }
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}
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#region ITableReader メンバ
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public DataTable Read()
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{
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DataTable newTable = table_.Clone();
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foreach (DataRow row in table_.Rows)
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{
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DataRow newRow = newTable.NewRow();
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Reload(row, newRow);
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newTable.Rows.Add(newRow);
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}
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newTable.AcceptChanges();
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return newTable;
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}
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#endregion
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protected virtual void Reload(DataRow row, DataRow newRow)
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{
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ISelectHandler selectHandler = new BasicSelectHandler(
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dataSource_,
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sql_,
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new DataRowReloadDataReaderHandler(row, newRow)
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);
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object[] args = new object[primaryKeys_.Length];
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for (int i = 0; i < primaryKeys_.Length; ++i)
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{
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args[i] = row[primaryKeys_[i]];
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}
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selectHandler.Execute(args);
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}
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}
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}
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