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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.Reflection;
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using Seasar.Extension.ADO;
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namespace Seasar.Dao.Impl
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{
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public class BeanListMetaDataDataReaderHandler
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: AbstractBeanMetaDataDataReaderHandler
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{
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public BeanListMetaDataDataReaderHandler(IBeanMetaData beanMetaData)
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: base(beanMetaData)
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{
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}
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public override object Handle(IDataReader dataReader)
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{
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IList columnNames = CreateColumnNames(dataReader.GetSchemaTable());
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ArrayList list = new ArrayList();
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int relSize = BeanMetaData.RelationPropertyTypeSize;
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RelationRowCache relRowCache = new RelationRowCache(relSize);
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while(dataReader.Read())
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{
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object row = CreateRow(dataReader, columnNames);
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for(int i = 0; i < relSize; ++i)
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{
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IRelationPropertyType rpt = BeanMetaData.GetRelationPropertyType(i);
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if(rpt == null) continue;
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object relRow = null;
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Hashtable relKeyValues = new Hashtable();
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RelationKey relKey = CreateRelationKey(dataReader, rpt, columnNames,
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relKeyValues);
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if(relKey != null)
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{
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relRow = relRowCache.GetRelationRow(i, relKey);
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if(relRow == null)
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{
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relRow = CreateRelationRow(dataReader, rpt, columnNames,
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relKeyValues);
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relRowCache.AddRelationRow(i, relKey, relRow);
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}
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}
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if(relRow != null)
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{
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PropertyInfo pi = rpt.PropertyInfo;
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pi.SetValue(row, relRow, null);
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}
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}
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list.Add(row);
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}
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return list;
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}
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protected RelationKey CreateRelationKey(IDataReader reader,
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IRelationPropertyType rpt, IList columnNames, Hashtable relKeyValues)
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{
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ArrayList keyList = new ArrayList();
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IBeanMetaData bmd = rpt.BeanMetaData;
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for(int i = 0; i < rpt.KeySize; ++i)
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{
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IValueType valueType = null;
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string columnName = rpt.GetMyKey(i);
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IPropertyType pt;
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if(columnNames.Contains(columnName))
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{
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pt = BeanMetaData.GetPropertyTypeByColumnName(columnName);
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valueType = pt.ValueType;
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}
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else
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{
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pt = bmd.GetPropertyTypeByColumnName(rpt.GetYourKey(i));
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columnName = pt.ColumnName + "_" + rpt.RelationNo;
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if(columnNames.Contains(columnName))
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valueType = pt.ValueType;
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else
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return null;
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}
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object value = valueType.GetValue(reader, columnName);
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if(value == null) return null;
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relKeyValues[columnName] = value;
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keyList.Add(value);
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}
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if(keyList.Count > 0)
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{
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object[] keys = keyList.ToArray();
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return new RelationKey(keys);
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}
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else return null;
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}
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}
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}
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