/*
BSD 3-Clause License
Copyright (c) 2017, B. Wofter
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of the copyright holder nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
namespace BWofter.Converters.Collections.Generic
{
using BWofter.Converters.Data;
using BWofter.Converters.Extensions;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
/// A static class used to convert dictionaries into entities.
/// The entity type to convert to.
public static class DictionaryConverter where TEntity : class, new()
{
/// Iterates over the of keys and values in the
/// , mapping their fields to the entity type.
/// The instance of keys and values
/// to map to the entity type.
/// An instance of the entity type.
public static TEntity ToEntity(IDictionary dictionary)
{
if (dictionary == null) throw new ArgumentNullException(nameof(dictionary));
return ToEntities(new[] { dictionary }).FirstOrDefault();
}
/// Iterates over the of keys and values in the
/// , mapping their fields to the entity type.
/// The instance of keys and values
/// to map to the entity type.
/// The to map the keys to properties.
/// An instance of the entity type.
public static TEntity ToEntity(IDictionary dictionary, IDictionary columnToMemberMap)
{
if (dictionary == null) throw new ArgumentNullException(nameof(dictionary));
if (columnToMemberMap == null) throw new ArgumentNullException(nameof(columnToMemberMap));
return ToEntities(new[] { dictionary }, columnToMemberMap).FirstOrDefault();
}
/// Iterates over the of keys and values in the
/// , mapping their fields to the entity type.
/// The instances of keys and values
/// to map to the entity type.
/// A yielded instance of the entity type.
public static IEnumerable ToEntities(IEnumerable> dictionaries)
{
IDictionary first = dictionaries?.FirstOrDefault();
if (dictionaries == null) throw new ArgumentNullException(nameof(dictionaries));
if (first == null) throw new ArgumentException($"Parameter {nameof(dictionaries)} should have at least 1 value, 0 given.");
//Get a table definition for the dictionaries then call the data table converter.
DataTable dataTable = first.AsDataTableDefinition();
return DataTableConverter.ToEntities(dictionaries.Select(d => DictionaryToDataRow(d, dataTable)));
}
/// Iterates over the of keys and values in the
/// , mapping their fields to the entity type.
/// The instances of keys and values
/// to map to the entity type.
/// The to map the keys to properties.
/// A yielded instance of the entity type.
public static IEnumerable ToEntities(IEnumerable> dictionaries, IDictionary columnToMemberMap)
{
IDictionary first = dictionaries?.FirstOrDefault();
if (dictionaries == null) throw new ArgumentNullException(nameof(dictionaries));
if (columnToMemberMap == null) throw new ArgumentNullException(nameof(columnToMemberMap));
if (first == null) throw new ArgumentException($"Parameter {nameof(dictionaries)} should have at least 1 value, 0 given.");
//Get a table definition for the dictionaries then call the data table converter.
DataTable dataTable = first.AsDataTableDefinition();
//Converts the sting/string column to member map into a data column/string column to member map.
Dictionary translatedColumnToMemberMap = new Dictionary();
foreach (KeyValuePair entry in columnToMemberMap)
{
translatedColumnToMemberMap.Add(dataTable.Columns[entry.Key], entry.Value);
}
return DataTableConverter.ToEntities(dictionaries.Select(d => DictionaryToDataRow(d, dataTable)), translatedColumnToMemberMap);
}
//Generates a new data row for each dictionary in the the ienumerable.
private static DataRow DictionaryToDataRow(IDictionary rowData, DataTable dataTable)
{
//Create a new data row and add it to the data table.
DataRow dataRow = dataTable.NewRow();
dataTable.Rows.Add(dataRow);
//Iterate over the entries in the dictionary and add them to the row.
foreach (KeyValuePair entry in rowData)
{
dataRow[entry.Key] = entry.Value;
}
return dataRow;
}
}
}