Added support for code contracts (requires VS support!)

Implemented Contracts into existing classes (yet incomplete especially with Interface implementations in NavObject). Otherwise it basically works.

NAV Source Control Test Host/App.config

@@ -1,6 +1,6 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/>
     </startup>
 </configuration>

NAV Source Control Test Host/NAV Source Control Test Host.csproj

@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>NavScm.TestHost</RootNamespace>
     <AssemblyName>NAV Source Control Test Host</AssemblyName>
-    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <PublishUrl>publish\</PublishUrl>
@@ -27,6 +27,8 @@
     <IsWebBootstrapper>false</IsWebBootstrapper>
     <UseApplicationTrust>false</UseApplicationTrust>
     <BootstrapperEnabled>true</BootstrapperEnabled>
+    <TargetFrameworkProfile />
+    <CodeContractsAssemblyMode>0</CodeContractsAssemblyMode>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>
@@ -37,6 +39,49 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <CodeContractsEnableRuntimeChecking>True</CodeContractsEnableRuntimeChecking>
+    <CodeContractsRuntimeOnlyPublicSurface>False</CodeContractsRuntimeOnlyPublicSurface>
+    <CodeContractsRuntimeThrowOnFailure>False</CodeContractsRuntimeThrowOnFailure>
+    <CodeContractsRuntimeCallSiteRequires>False</CodeContractsRuntimeCallSiteRequires>
+    <CodeContractsRuntimeSkipQuantifiers>False</CodeContractsRuntimeSkipQuantifiers>
+    <CodeContractsRunCodeAnalysis>True</CodeContractsRunCodeAnalysis>
+    <CodeContractsNonNullObligations>True</CodeContractsNonNullObligations>
+    <CodeContractsBoundsObligations>True</CodeContractsBoundsObligations>
+    <CodeContractsArithmeticObligations>True</CodeContractsArithmeticObligations>
+    <CodeContractsEnumObligations>True</CodeContractsEnumObligations>
+    <CodeContractsRedundantAssumptions>True</CodeContractsRedundantAssumptions>
+    <CodeContractsAssertsToContractsCheckBox>True</CodeContractsAssertsToContractsCheckBox>
+    <CodeContractsRedundantTests>True</CodeContractsRedundantTests>
+    <CodeContractsMissingPublicRequiresAsWarnings>True</CodeContractsMissingPublicRequiresAsWarnings>
+    <CodeContractsMissingPublicEnsuresAsWarnings>False</CodeContractsMissingPublicEnsuresAsWarnings>
+    <CodeContractsInferRequires>True</CodeContractsInferRequires>
+    <CodeContractsInferEnsures>False</CodeContractsInferEnsures>
+    <CodeContractsInferEnsuresAutoProperties>True</CodeContractsInferEnsuresAutoProperties>
+    <CodeContractsInferObjectInvariants>False</CodeContractsInferObjectInvariants>
+    <CodeContractsSuggestAssumptions>False</CodeContractsSuggestAssumptions>
+    <CodeContractsSuggestAssumptionsForCallees>False</CodeContractsSuggestAssumptionsForCallees>
+    <CodeContractsSuggestRequires>False</CodeContractsSuggestRequires>
+    <CodeContractsNecessaryEnsures>True</CodeContractsNecessaryEnsures>
+    <CodeContractsSuggestObjectInvariants>False</CodeContractsSuggestObjectInvariants>
+    <CodeContractsSuggestReadonly>True</CodeContractsSuggestReadonly>
+    <CodeContractsRunInBackground>True</CodeContractsRunInBackground>
+    <CodeContractsShowSquigglies>True</CodeContractsShowSquigglies>
+    <CodeContractsUseBaseLine>False</CodeContractsUseBaseLine>
+    <CodeContractsEmitXMLDocs>False</CodeContractsEmitXMLDocs>
+    <CodeContractsCustomRewriterAssembly />
+    <CodeContractsCustomRewriterClass />
+    <CodeContractsLibPaths />
+    <CodeContractsExtraRewriteOptions />
+    <CodeContractsExtraAnalysisOptions />
+    <CodeContractsSQLServerOption />
+    <CodeContractsBaseLineFile />
+    <CodeContractsCacheAnalysisResults>True</CodeContractsCacheAnalysisResults>
+    <CodeContractsSkipAnalysisIfCannotConnectToCache>False</CodeContractsSkipAnalysisIfCannotConnectToCache>
+    <CodeContractsFailBuildOnWarnings>False</CodeContractsFailBuildOnWarnings>
+    <CodeContractsBeingOptimisticOnExternal>True</CodeContractsBeingOptimisticOnExternal>
+    <CodeContractsRuntimeCheckingLevel>Full</CodeContractsRuntimeCheckingLevel>
+    <CodeContractsReferenceAssembly>%28none%29</CodeContractsReferenceAssembly>
+    <CodeContractsAnalysisWarningLevel>0</CodeContractsAnalysisWarningLevel>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>

NAVSCM Library/App.config

@@ -1,7 +1,7 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   
   <connectionStrings>
-    <add name="TERRABIT_2015_DEVEntities" connectionString="metadata=res://*/NavScm.NavInterface.SQL.Model1.csdl|res://*/NavScm.NavInterface.SQL.Model1.ssdl|res://*/NavScm.NavInterface.SQL.Model1.msl;provider=System.Data.SqlClient;provider connection string='data source=tbrt-sql-erp-01;initial catalog=&quot;TERRABIT 2015 DEV&quot;;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework'" providerName="System.Data.EntityClient" />
+    <add name="TERRABIT_2015_DEVEntities" connectionString="metadata=res://*/NavScm.NavInterface.SQL.Model1.csdl|res://*/NavScm.NavInterface.SQL.Model1.ssdl|res://*/NavScm.NavInterface.SQL.Model1.msl;provider=System.Data.SqlClient;provider connection string='data source=tbrt-sql-erp-01;initial catalog=&quot;TERRABIT 2015 DEV&quot;;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework'" providerName="System.Data.EntityClient"/>
   </connectionStrings>
-</configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/></startup></configuration>

NAVSCM Library/NAVSCM Library.csproj

@@ -9,8 +9,10 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>NavScm</RootNamespace>
     <AssemblyName>NavScm Library</AssemblyName>
-    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
+    <CodeContractsAssemblyMode>1</CodeContractsAssemblyMode>
+    <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -22,6 +24,49 @@
     <WarningLevel>4</WarningLevel>
     <DocumentationFile>
     </DocumentationFile>
+    <CodeContractsEnableRuntimeChecking>True</CodeContractsEnableRuntimeChecking>
+    <CodeContractsRuntimeOnlyPublicSurface>False</CodeContractsRuntimeOnlyPublicSurface>
+    <CodeContractsRuntimeThrowOnFailure>True</CodeContractsRuntimeThrowOnFailure>
+    <CodeContractsRuntimeCallSiteRequires>False</CodeContractsRuntimeCallSiteRequires>
+    <CodeContractsRuntimeSkipQuantifiers>False</CodeContractsRuntimeSkipQuantifiers>
+    <CodeContractsRunCodeAnalysis>True</CodeContractsRunCodeAnalysis>
+    <CodeContractsNonNullObligations>True</CodeContractsNonNullObligations>
+    <CodeContractsBoundsObligations>True</CodeContractsBoundsObligations>
+    <CodeContractsArithmeticObligations>True</CodeContractsArithmeticObligations>
+    <CodeContractsEnumObligations>True</CodeContractsEnumObligations>
+    <CodeContractsRedundantAssumptions>True</CodeContractsRedundantAssumptions>
+    <CodeContractsAssertsToContractsCheckBox>True</CodeContractsAssertsToContractsCheckBox>
+    <CodeContractsRedundantTests>True</CodeContractsRedundantTests>
+    <CodeContractsMissingPublicRequiresAsWarnings>True</CodeContractsMissingPublicRequiresAsWarnings>
+    <CodeContractsMissingPublicEnsuresAsWarnings>False</CodeContractsMissingPublicEnsuresAsWarnings>
+    <CodeContractsInferRequires>True</CodeContractsInferRequires>
+    <CodeContractsInferEnsures>False</CodeContractsInferEnsures>
+    <CodeContractsInferEnsuresAutoProperties>True</CodeContractsInferEnsuresAutoProperties>
+    <CodeContractsInferObjectInvariants>False</CodeContractsInferObjectInvariants>
+    <CodeContractsSuggestAssumptions>False</CodeContractsSuggestAssumptions>
+    <CodeContractsSuggestAssumptionsForCallees>False</CodeContractsSuggestAssumptionsForCallees>
+    <CodeContractsSuggestRequires>False</CodeContractsSuggestRequires>
+    <CodeContractsNecessaryEnsures>True</CodeContractsNecessaryEnsures>
+    <CodeContractsSuggestObjectInvariants>False</CodeContractsSuggestObjectInvariants>
+    <CodeContractsSuggestReadonly>True</CodeContractsSuggestReadonly>
+    <CodeContractsRunInBackground>True</CodeContractsRunInBackground>
+    <CodeContractsShowSquigglies>True</CodeContractsShowSquigglies>
+    <CodeContractsUseBaseLine>False</CodeContractsUseBaseLine>
+    <CodeContractsEmitXMLDocs>True</CodeContractsEmitXMLDocs>
+    <CodeContractsCustomRewriterAssembly />
+    <CodeContractsCustomRewriterClass />
+    <CodeContractsLibPaths />
+    <CodeContractsExtraRewriteOptions />
+    <CodeContractsExtraAnalysisOptions />
+    <CodeContractsSQLServerOption />
+    <CodeContractsBaseLineFile />
+    <CodeContractsCacheAnalysisResults>True</CodeContractsCacheAnalysisResults>
+    <CodeContractsSkipAnalysisIfCannotConnectToCache>False</CodeContractsSkipAnalysisIfCannotConnectToCache>
+    <CodeContractsFailBuildOnWarnings>False</CodeContractsFailBuildOnWarnings>
+    <CodeContractsBeingOptimisticOnExternal>True</CodeContractsBeingOptimisticOnExternal>
+    <CodeContractsRuntimeCheckingLevel>Full</CodeContractsRuntimeCheckingLevel>
+    <CodeContractsReferenceAssembly>Build</CodeContractsReferenceAssembly>
+    <CodeContractsAnalysisWarningLevel>0</CodeContractsAnalysisWarningLevel>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
@@ -50,6 +95,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="NavInterface\DevEnvInterface.cs" />
     <Compile Include="NavInterface\NavSQL.designer.cs">
       <AutoGen>True</AutoGen>
       <DesignTime>True</DesignTime>

NAVSCM Library/NavInterface/DevEnvInterface.cs

@@ -0,0 +1,81 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.IO;
+using System.Diagnostics.Contracts;
+
+namespace NavScm.NavInterface
+{
+    /// <summary>
+    /// Interfaces to the NAV IDE command line interface to export / import objects.
+    /// </summary>
+    /// <remarks>
+    /// <para>The interface is based on the powershell snippets delivered with NAV. 
+    /// Note, that the devenv does not give any return values. Instead, errors can only
+    /// be detected by the existance of the log file, which is created only upon errors.</para>
+    /// <para>Currently, the interface expects to be able to access the database using
+    /// NTLM Single Sign on. SQL user/pass authentication is not supported.</para>
+    /// </remarks>
+    class DevEnvInterface
+    {
+        private static readonly log4net.ILog log = log4net.LogManager.GetLogger(typeof(DevEnvInterface));
+
+        /// <summary>
+        /// Path to the dev env executable.
+        /// </summary>
+        protected string DevEnvPath { get; private set; }
+
+        /// <summary>
+        /// Hostname of the database server.
+        /// </summary>
+        protected string DatabaseServer { get; private set; }
+
+        /// <summary>
+        /// Name of the database itself.
+        /// </summary>
+        protected string DatabaseName { get; private set; }
+
+        /// <summary>
+        /// Create an interface class to a given NAV developer environment.
+        /// </summary>
+        /// <param name="devEnvPath">Full path and name to finsql.exe (or however you call it).</param>
+        public DevEnvInterface(string devEnvPath, string databaseServer, string databaseName)
+        {
+            Contract.Requires(devEnvPath != "");
+            Contract.Requires(databaseServer != "");
+            Contract.Requires(databaseName != "");
+            Contract.Ensures(File.Exists(DevEnvPath));
+            Contract.Ensures(databaseName == DatabaseName);
+            Contract.Ensures(databaseServer == DatabaseServer);
+            Contract.Ensures(devEnvPath == DevEnvPath);
+            
+            DevEnvPath = devEnvPath;
+            if (!File.Exists(DevEnvPath))
+                throw new InvalidOperationException($"The file {DevEnvPath} was not found.");
+
+            DatabaseServer = databaseServer;
+            DatabaseName = databaseName;
+
+            if (log.IsDebugEnabled)
+            {
+                log.Debug($"Constructed and attached to DevEnv {DevEnvPath}");
+                log.Debug($"Using database [{DatabaseName}] on server {DatabaseServer}");
+            }
+        }
+
+        /// <summary>
+        /// Exports a given NAV object to disk.
+        /// </summary>
+        /// <param name="obj">The NAV object as taken from the SQL database or from the cache (doesn't matter).</param>
+        /// <param name="destinationFileName">The name of the destination file. The system ensures, that the file
+        /// ends with .txt, as finsql.exe deduces the export format from the destiation files extension (crap).</param>
+        public void Export(NavObject obj, string destinationFileName)
+        {
+            Contract.Requires(obj != null);
+            Contract.Requires(destinationFileName != "");
+        }
+
+    }
+}

NAVSCM Library/NavInterface/NavObject.cs

@@ -4,6 +4,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using System.Diagnostics.Contracts;
 
 namespace NavScm.NavInterface
 {
@@ -43,15 +44,21 @@ namespace NavScm.NavInterface
     /// <seealso cref="NavObjectType"/>
     partial class NavObject : IEquatable<NavObject>, IComparable, IComparable<NavObject>
     {
+        private static readonly log4net.ILog log = log4net.LogManager.GetLogger(typeof(NavObject));
+
         /// <summary>
         /// Validate restrictions on supported objects as outlined in the class description.
         /// </summary>
         partial void OnLoaded()
         {
+            Contract.Requires(Company_Name.Length == 0);
+            Contract.Requires(Type >= 0  && Type <= 9 && Type != 2 && Type != 4 );
+            /*
             if (Company_Name.Length > 0)
                 throw new InvalidOperationException($"The object {CacheKey} holds a variant with the company name {Company_Name}, which is unsupported");
             if (Type < 0 || Type == 2 || Type == 4 || Type > 9)
                 throw new InvalidOperationException($"The object type of {CacheKey} is unsupported");
+            */
         }
 
         /// <summary>
@@ -75,20 +82,15 @@ namespace NavScm.NavInterface
         /// </summary>
         public string CacheKey
         {
-            get {
+            get { return $"{Type}.{ID}"; }   
-                return $"{Type}.{ID}";
-            }   
         }
 
         /// <summary>
         /// Converts the Date and Time fields to a combined Date/Time value.
         /// </summary>
-        public DateTime Modified
+        public DateTime ModifiedDate
         {
-            get
+            get { return Date.Add(Time.TimeOfDay); }
-            {
-                return Date.Add(Time.TimeOfDay);
-            }
         }
 
         /// <summary>