From fc74d2da28285586c58324428c5baac8b6396c82 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=82=BA=E4=BB=80=E9=BA=BC?= <andy840119@gmail.com>
Date: Thu, 8 Nov 2018 17:05:45 +0800
Subject: [PATCH 1/3] change the framework to net461 because 4.5 is too old

---
 src/NReco.Recommender.Tests/NReco.Recommender.Tests.csproj | 6 ++++--
 src/NReco.Recommender/NReco.Recommender.csproj             | 6 ++++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/NReco.Recommender.Tests/NReco.Recommender.Tests.csproj b/src/NReco.Recommender.Tests/NReco.Recommender.Tests.csproj
index 0c7d49e..1cd6091 100644
--- a/src/NReco.Recommender.Tests/NReco.Recommender.Tests.csproj
+++ b/src/NReco.Recommender.Tests/NReco.Recommender.Tests.csproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>NReco.Recommender.Tests</RootNamespace>
     <AssemblyName>NReco.Recommender.Tests</AssemblyName>
-    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <TargetFrameworkProfile />
   </PropertyGroup>
@@ -21,6 +21,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
@@ -29,6 +30,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="nunit.framework, Version=2.6.4.14350, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77, processorArchitecture=MSIL">
diff --git a/src/NReco.Recommender/NReco.Recommender.csproj b/src/NReco.Recommender/NReco.Recommender.csproj
index 3f6c752..d9dfe8d 100644
--- a/src/NReco.Recommender/NReco.Recommender.csproj
+++ b/src/NReco.Recommender/NReco.Recommender.csproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>NReco.Recommender</RootNamespace>
     <AssemblyName>NReco.Recommender</AssemblyName>
-    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <TargetFrameworkProfile />
   </PropertyGroup>
@@ -22,6 +22,7 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <DocumentationFile>bin\Debug\NReco.Recommender.XML</DocumentationFile>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
@@ -31,6 +32,7 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <DocumentationFile>bin\Release\NReco.Recommender.XML</DocumentationFile>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />

From 828b3eb64c93398b1c0e03483add3b1ada6ddb71 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=82=BA=E4=BB=80=E9=BA=BC?= <andy840119@gmail.com>
Date: Thu, 8 Nov 2018 17:37:41 +0800
Subject: [PATCH 2/3] change the library to .netstandard format support .net461
 and .netStandard2.0 . all unit test passed.

---
 .../NReco.Recommender.csproj                  | 423 ++----------------
 .../Properties/AssemblyInfo.cs                |  36 --
 2 files changed, 29 insertions(+), 430 deletions(-)
 delete mode 100644 src/NReco.Recommender/Properties/AssemblyInfo.cs

diff --git a/src/NReco.Recommender/NReco.Recommender.csproj b/src/NReco.Recommender/NReco.Recommender.csproj
index d9dfe8d..442af2f 100644
--- a/src/NReco.Recommender/NReco.Recommender.csproj
+++ b/src/NReco.Recommender/NReco.Recommender.csproj
@@ -1,399 +1,34 @@
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-<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+<Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>{A5DA1BF8-7601-45FC-A906-F61AC63D8EE7}</ProjectGuid>
-    <OutputType>Library</OutputType>
-    <AppDesignerFolder>Properties</AppDesignerFolder>
-    <RootNamespace>NReco.Recommender</RootNamespace>
-    <AssemblyName>NReco.Recommender</AssemblyName>
-    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
-    <FileAlignment>512</FileAlignment>
-    <TargetFrameworkProfile />
+    <TargetFrameworks>net461;netstandard2.0</TargetFrameworks>
+    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    <Version>1.0.0.0</Version>
+    <Authors>NReco</Authors>
+    <Product>NReco</Product>
+    <Copyright>Copyright (C) NReco, 2018</Copyright>
+    <PackageProjectUrl>https://github.com/nreco/recommender</PackageProjectUrl>
+    <RepositoryUrl>https://github.com/nreco/recommender.git</RepositoryUrl>
+    <RepositoryType>git</RepositoryType>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-    <DebugSymbols>true</DebugSymbols>
-    <DebugType>full</DebugType>
-    <Optimize>false</Optimize>
-    <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\NReco.Recommender.XML</DocumentationFile>
-    <Prefer32Bit>false</Prefer32Bit>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\NReco.Recommender.XML</DocumentationFile>
-    <Prefer32Bit>false</Prefer32Bit>
-  </PropertyGroup>
-  <ItemGroup>
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-    <Reference Include="System.Core" />
-    <Reference Include="System.Numerics" />
-    <Reference Include="System.Xml.Linq" />
-    <Reference Include="System.Data.DataSetExtensions" />
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-    <Reference Include="System.Xml" />
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-    <Compile Include="math\ContinuedFraction.cs" />
-    <Compile Include="math\Gamma.cs" />
-    <Compile Include="math\ImplicitFeedbackAlternatingLeastSquaresSolver.cs" />
-    <Compile Include="math\IRandomGenerator.cs" />
-    <Compile Include="math\LogLikelihood.cs" />
-    <Compile Include="math\MathUtil.cs" />
-    <Compile Include="math\MatrixUtil.cs" />
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-    <Compile Include="math\NotStrictlyPositiveException.cs" />
-    <Compile Include="math\PascalDistribution.cs" />
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-    <Compile Include="taste\model\IPreference.cs" />
-    <Compile Include="taste\model\IPreferenceArray.cs" />
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-    <Compile Include="taste\recommender\IDRescorer.cs">
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-    <Compile Include="taste\recommender\IRecommendedItem.cs" />
-    <Compile Include="taste\recommender\IRecommender.cs" />
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-    <Compile Include="taste\similarity\precompute\SimilarItems.cs">
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+
   <ItemGroup>
-    <Folder Include="taste\impl\common\jdbc\" />
-    <Folder Include="taste\impl\similarity\file\" />
-    <Folder Include="taste\impl\similarity\precompute\" />
+    <Compile Remove="taste\impl\common\jdbc\AbstractJDBCComponent.cs" />
+    <Compile Remove="taste\impl\common\jdbc\EachRowIterator.cs" />
+    <Compile Remove="taste\impl\common\jdbc\ResultSetIterator.cs" />
+    <Compile Remove="taste\impl\model\AbstractIDMigrator.cs" />
+    <Compile Remove="taste\impl\model\AbstractJDBCIDMigrator.cs" />
+    <Compile Remove="taste\impl\model\file\FileIDMigrator.cs" />
+    <Compile Remove="taste\impl\model\MemoryIDMigrator.cs" />
+    <Compile Remove="taste\impl\model\MySQLJDBCIDMigrator.cs" />
+    <Compile Remove="taste\impl\similarity\file\FileItemItemSimilarityIterable.cs" />
+    <Compile Remove="taste\impl\similarity\file\FileItemItemSimilarityIterator.cs" />
+    <Compile Remove="taste\impl\similarity\file\FileItemSimilarity.cs" />
+    <Compile Remove="taste\impl\similarity\precompute\FileSimilarItemsWriter.cs" />
+    <Compile Remove="taste\impl\similarity\precompute\MultithreadedBatchItemSimilarities.cs" />
+    <Compile Remove="taste\model\IDMigrator.cs" />
+    <Compile Remove="taste\model\JDBCDataModel.cs" />
+    <Compile Remove="taste\model\UpdatableIDMigrator.cs" />
   </ItemGroup>
-  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
-       Other similar extension points exist, see Microsoft.Common.targets.
-  <Target Name="BeforeBuild">
-  </Target>
-  <Target Name="AfterBuild">
-  </Target>
-  -->
+  
 </Project>
\ No newline at end of file
diff --git a/src/NReco.Recommender/Properties/AssemblyInfo.cs b/src/NReco.Recommender/Properties/AssemblyInfo.cs
deleted file mode 100644
index bd32968..0000000
--- a/src/NReco.Recommender/Properties/AssemblyInfo.cs
+++ /dev/null
@@ -1,36 +0,0 @@
-using System.Reflection;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-
-// General Information about an assembly is controlled through the following 
-// set of attributes. Change these attribute values to modify the information
-// associated with an assembly.
-[assembly: AssemblyTitle("NReco.Recommender")]
-[assembly: AssemblyDescription("Recommender is a .NET port of Apache Mahout Collaborative Filtering engine (standalone non-Hadoop implementation). Recommendation mining takes users' behaviour and suggests items users might like (both user-based and item-based recommendation algorithms are supported). Recommender can be used for suggesting products, movies, music etc.")]
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("Vitalii Fedorchenko")]
-[assembly: AssemblyProduct("NReco.Recommender")]
-[assembly: AssemblyCopyright("Copyright © Vitalii Fedorchenko 2014-2015")]
-[assembly: AssemblyTrademark("")]
-[assembly: AssemblyCulture("")]
-
-// Setting ComVisible to false makes the types in this assembly not visible 
-// to COM components.  If you need to access a type in this assembly from 
-// COM, set the ComVisible attribute to true on that type.
-[assembly: ComVisible(false)]
-
-// The following GUID is for the ID of the typelib if this project is exposed to COM
-[assembly: Guid("91bbbc68-48a8-4cb4-811a-67ad0d2b8afb")]
-
-// Version information for an assembly consists of the following four values:
-//
-//      Major Version
-//      Minor Version 
-//      Build Number
-//      Revision
-//
-// You can specify all the values or you can default the Build and Revision Numbers 
-// by using the '*' as shown below:
-// [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.0.0")]
-[assembly: AssemblyFileVersion("1.0.0.0")]

From 6c3f4c59c8fa29679ebbffefea4e7e0a28a8b970 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=82=BA=E4=BB=80=E9=BA=BC?= <andy840119@gmail.com>
Date: Thu, 8 Nov 2018 18:22:18 +0800
Subject: [PATCH 3/3] add support in .net40 . summary : 1. change library to
 .netstandard project format 2. support .net40 .net 461 and .netstandard2.0
 (not support .netStandard1.3 because ICloneable is not implemented in 1.3) 3.
 all test passed

---
 src/NReco.Recommender/NReco.Recommender.csproj | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/NReco.Recommender/NReco.Recommender.csproj b/src/NReco.Recommender/NReco.Recommender.csproj
index 442af2f..58e2774 100644
--- a/src/NReco.Recommender/NReco.Recommender.csproj
+++ b/src/NReco.Recommender/NReco.Recommender.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>net40;net461;netstandard2.0</TargetFrameworks>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <Version>1.0.0.0</Version>
     <Authors>NReco</Authors>