mirror of
https://github.com/Sonarr/Sonarr.git
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167 lines
5.5 KiB
C#
167 lines
5.5 KiB
C#
/* Copyright (C) 2008 - 2011 Jordan Marr
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library. If not, see <http://www.gnu.org/licenses/>. */
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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.Reflection;
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using Marr.Data.Mapping;
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using System.Linq.Expressions;
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namespace Marr.Data
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{
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/// <summary>
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/// This class contains misc. extension methods that are used throughout the project.
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/// </summary>
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internal static class DataHelper
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{
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public static bool HasColumn(this IDataReader dr, string columnName)
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{
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for (int i=0; i < dr.FieldCount; i++)
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{
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if (dr.GetName(i).Equals(columnName, StringComparison.InvariantCultureIgnoreCase))
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return true;
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}
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return false;
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}
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public static string ParameterPrefix(this IDbCommand command)
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{
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string commandType = command.GetType().Name.ToLower();
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return commandType.Contains("oracle") ? ":" : "@";
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}
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/// <summary>
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/// Returns the mapped name, or the member name.
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/// </summary>
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/// <param name="member"></param>
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/// <returns></returns>
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public static string GetTableName(this MemberInfo member)
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{
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string tableName = MapRepository.Instance.GetTableName(member.DeclaringType);
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return tableName ?? member.DeclaringType.Name;
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}
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public static string GetTableName(this Type memberType)
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{
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return MapRepository.Instance.GetTableName(memberType);
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}
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public static string GetColumName(this IColumnInfo col, bool useAltName)
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{
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if (useAltName)
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{
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return col.TryGetAltName();
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}
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return col.Name;
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}
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/// <summary>
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/// Returns the mapped column name, or the member name.
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/// </summary>
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/// <param name="member"></param>
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/// <returns></returns>
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public static string GetColumnName(Type declaringType, string propertyName, bool useAltName)
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{
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// Initialize column name as member name
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string columnName = propertyName;
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var columnMap = MapRepository.Instance.GetColumns(declaringType).GetByFieldName(propertyName);
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if (columnMap == null)
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{
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throw new InvalidOperationException(string.Format("Column map missing for field {0}.{1}", declaringType.FullName, propertyName));
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}
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if (useAltName)
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{
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columnName = columnMap.ColumnInfo.TryGetAltName();
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}
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else
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{
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columnName = columnMap.ColumnInfo.Name;
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}
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return columnName;
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}
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/// <summary>
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/// Determines a property name from a passed in expression.
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/// Ex: p => p.FirstName -> "FirstName
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="member"></param>
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/// <returns></returns>
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public static string GetMemberName<T>(this Expression<Func<T, object>> member)
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{
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var memberExpression = (member.Body as MemberExpression);
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if (memberExpression == null)
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{
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memberExpression = (member.Body as UnaryExpression).Operand as MemberExpression;
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}
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return memberExpression.Member.Name;
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}
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public static string GetMemberName(this LambdaExpression exp)
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{
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var memberExpression = (exp.Body as MemberExpression);
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if (memberExpression == null)
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{
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memberExpression = (exp.Body as UnaryExpression).Operand as MemberExpression;
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}
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return memberExpression.Member.Name;
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}
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public static bool ContainsMember(this List<MemberInfo> list, MemberInfo member)
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{
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foreach (var m in list)
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{
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if (m.EqualsMember(member))
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return true;
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}
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return false;
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}
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public static bool EqualsMember(this MemberInfo member, MemberInfo otherMember)
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{
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return member.Name == otherMember.Name && member.DeclaringType == otherMember.DeclaringType;
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}
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/// <summary>
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/// Determines if a type is not a complex object.
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/// </summary>
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public static bool IsSimpleType(Type type)
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{
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Type underlyingType = !IsNullableType(type) ? type : type.GetGenericArguments()[0];
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return
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underlyingType.IsPrimitive ||
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underlyingType.Equals(typeof(string)) ||
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underlyingType.Equals(typeof(DateTime)) ||
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underlyingType.Equals(typeof(decimal)) ||
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underlyingType.IsEnum;
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}
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public static bool IsNullableType(Type theType)
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{
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return (theType.IsGenericType && theType.GetGenericTypeDefinition().Equals(typeof(Nullable<>)));
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}
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}
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}
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