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TypeMapperBase.cs
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145 lines (117 loc) · 5.27 KB
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#region License
// The PostgreSQL License
//
// Copyright (C) 2018 The Npgsql Development Team
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph and the following two paragraphs appear in all copies.
//
// IN NO EVENT SHALL THE NPGSQL DEVELOPMENT TEAM BE LIABLE TO ANY PARTY
// FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
// INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
// DOCUMENTATION, EVEN IF THE NPGSQL DEVELOPMENT TEAM HAS BEEN ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//
// THE NPGSQL DEVELOPMENT TEAM SPECIFICALLY DISCLAIMS ANY WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
// ON AN "AS IS" BASIS, AND THE NPGSQL DEVELOPMENT TEAM HAS NO OBLIGATIONS
// TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
#endregion
using System;
using System.Collections.Generic;
using System.Reflection;
using Npgsql.TypeHandlers;
using NpgsqlTypes;
namespace Npgsql.TypeMapping
{
abstract class TypeMapperBase : INpgsqlTypeMapper
{
internal Dictionary<string, NpgsqlTypeMapping> Mappings { get; set; }
public INpgsqlNameTranslator DefaultNameTranslator { get; set; }
#region Mapping management
public virtual INpgsqlTypeMapper AddMapping(NpgsqlTypeMapping mapping)
{
if (Mappings.ContainsKey(mapping.PgTypeName))
RemoveMapping(mapping.PgTypeName);
Mappings[mapping.PgTypeName] = mapping;
return this;
}
public virtual bool RemoveMapping(string pgTypeName) => Mappings.Remove(pgTypeName);
IEnumerable<NpgsqlTypeMapping> INpgsqlTypeMapper.Mappings => Mappings.Values;
public abstract void Reset();
#endregion Mapping management
#region Enum mapping
public INpgsqlTypeMapper MapEnum<TEnum>(string pgName = null, INpgsqlNameTranslator nameTranslator = null)
where TEnum : struct
{
if (!typeof(TEnum).GetTypeInfo().IsEnum)
throw new ArgumentException("An enum type must be provided");
if (pgName != null && pgName.Trim() == "")
throw new ArgumentException("pgName can't be empty", nameof(pgName));
if (nameTranslator == null)
nameTranslator = DefaultNameTranslator;
if (pgName == null)
pgName = GetPgName<TEnum>(nameTranslator);
return AddMapping(new NpgsqlTypeMappingBuilder
{
PgTypeName = pgName,
ClrTypes = new[] { typeof(TEnum) },
TypeHandlerFactory = new EnumTypeHandlerFactory<TEnum>(nameTranslator)
}.Build());
}
public bool UnmapEnum<TEnum>(string pgName = null, INpgsqlNameTranslator nameTranslator = null) where TEnum : struct
{
if (!typeof(TEnum).GetTypeInfo().IsEnum)
throw new ArgumentException("An enum type must be provided");
if (pgName != null && pgName.Trim() == "")
throw new ArgumentException("pgName can't be empty", nameof(pgName));
if (nameTranslator == null)
nameTranslator = DefaultNameTranslator;
if (pgName == null)
pgName = GetPgName<TEnum>(nameTranslator);
return RemoveMapping(pgName);
}
#endregion Enum mapping
#region Composite mapping
public INpgsqlTypeMapper MapComposite<T>(string pgName = null, INpgsqlNameTranslator nameTranslator = null)
where T : new()
{
if (pgName != null && pgName.Trim() == "")
throw new ArgumentException("pgName can't be empty", nameof(pgName));
if (nameTranslator == null)
nameTranslator = DefaultNameTranslator;
if (pgName == null)
pgName = GetPgName<T>(nameTranslator);
return AddMapping(new NpgsqlTypeMappingBuilder
{
PgTypeName = pgName,
ClrTypes = new[] { typeof(T) },
TypeHandlerFactory = new MappedCompositeTypeHandlerFactory<T>(nameTranslator)
}.Build());
}
public bool UnmapComposite<T>(string pgName = null, INpgsqlNameTranslator nameTranslator = null)
where T: new()
{
if (pgName != null && pgName.Trim() == "")
throw new ArgumentException("pgName can't be empty", nameof(pgName));
if (nameTranslator == null)
nameTranslator = DefaultNameTranslator;
if (pgName == null)
pgName = GetPgName<T>(nameTranslator);
return RemoveMapping(pgName);
}
#endregion Composite mapping
#region Misc
static string GetPgName<T>(INpgsqlNameTranslator nameTranslator)
{
var attr = typeof(T).GetTypeInfo().GetCustomAttribute<PgNameAttribute>();
return attr == null
? nameTranslator.TranslateTypeName(typeof(T).Name)
: attr.PgName;
}
#endregion Misc
}
}