package org.seasar.extension.dataset.impl;

import java.sql.DatabaseMetaData;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;

import org.seasar.extension.dataset.DataRow;
import org.seasar.extension.dataset.DataTable;
import org.seasar.extension.dataset.states.RowStates;
import org.seasar.extension.dataset.types.ColumnTypes;
import org.seasar.extension.jdbc.PropertyType;
import org.seasar.extension.jdbc.ResultSetHandler;
import org.seasar.extension.jdbc.impl.PropertyTypeUtil;

public class DataTableResultSetHandler implements ResultSetHandler {

	private String tableName_;

	public DataTableResultSetHandler(String tableName) {
		tableName_ = tableName;
	}

	public String getTableName() {
		return tableName_;
	}

	public Object handle(ResultSet rs) throws SQLException {
		ResultSetMetaData rsmd = rs.getMetaData();
		PropertyType[] propertyTypes = PropertyTypeUtil
				.createPropertyTypes(rsmd);
		DataTable table = new DataTableImpl(tableName_);
		for (int i = 0; i < propertyTypes.length; ++i) {
			String propertyName = propertyTypes[i].getPropertyName();
			table.addColumn(propertyName, ColumnTypes
					.getColumnType(rsmd.getColumnType(i + 1)));
		}
		DatabaseMetaData dbMetaData = rs.getStatement().getConnection()
				.getMetaData();
		table.setupMetaData(dbMetaData);
		while (rs.next()) {
			addRow(rs, propertyTypes, table);
		}
		return table;
	}

	private void addRow(ResultSet rs, PropertyType[] propertyTypes,
			DataTable table) throws SQLException {

		DataRow row = table.addRow();
		for (int i = 0; i < propertyTypes.length; ++i) {
			Object value = propertyTypes[i].getValueType().getValue(rs, i + 1);
			row.setValue(propertyTypes[i].getPropertyName(), value);
		}
		row.setState(RowStates.UNCHANGED);
	}
}