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