[Nhibernate-commit] SF.net SVN: nhibernate:[5316] trunk/nhibernate/src/NHibernate

[<fab...@us...>]

Revision: 5316
          http://nhibernate.svn.sourceforge.net/nhibernate/?rev=5316&view=rev
Author:   fabiomaulo
Date:     2010-12-15 21:36:23 +0000 (Wed, 15 Dec 2010)

Log Message:
-----------
EnumerableExtensions (perhaps the place to replace some old stuff)

Modified Paths:
--------------
    trunk/nhibernate/src/NHibernate/NHibernate.csproj
    trunk/nhibernate/src/NHibernate.Test/NHibernate.Test.csproj

Added Paths:
-----------
    trunk/nhibernate/src/NHibernate/Util/EnumerableExtensions.cs
    trunk/nhibernate/src/NHibernate.Test/UtilityTest/EnumerableExtensionsTests/
    trunk/nhibernate/src/NHibernate.Test/UtilityTest/EnumerableExtensionsTests/AnyExtensionTests.cs

Modified: trunk/nhibernate/src/NHibernate/NHibernate.csproj
===================================================================
--- trunk/nhibernate/src/NHibernate/NHibernate.csproj	2010-12-15 18:29:52 UTC (rev 5315)
+++ trunk/nhibernate/src/NHibernate/NHibernate.csproj	2010-12-15 21:36:23 UTC (rev 5316)
@@ -440,6 +440,7 @@
     <Compile Include="Util\ADOExceptionReporter.cs" />
     <Compile Include="Util\ArrayHelper.cs" />
     <Compile Include="Util\CollectionPrinter.cs" />
+    <Compile Include="Util\EnumerableExtensions.cs" />
     <Compile Include="Util\IdentityMap.cs" />
     <Compile Include="Util\JoinedEnumerable.cs" />
     <Compile Include="Util\ObjectUtils.cs" />

Added: trunk/nhibernate/src/NHibernate/Util/EnumerableExtensions.cs
===================================================================
--- trunk/nhibernate/src/NHibernate/Util/EnumerableExtensions.cs	                        (rev 0)
+++ trunk/nhibernate/src/NHibernate/Util/EnumerableExtensions.cs	2010-12-15 21:36:23 UTC (rev 5316)
@@ -0,0 +1,75 @@
+using System;
+using System.Collections;
+
+namespace NHibernate.Util
+{
+	public static class EnumerableExtensions
+	{
+		public static bool Any(this IEnumerable source)
+		{
+			if (source == null)
+			{
+				throw new ArgumentNullException("source");
+			}
+			using (DisposableEnumerator enumerator = source.GetDisposableEnumerator())
+			{
+				if (enumerator.MoveNext())
+				{
+					return true;
+				}
+			}
+			return false;
+		}
+
+		private static DisposableEnumerator GetDisposableEnumerator(this IEnumerable source)
+		{
+			return new DisposableEnumerator(source);
+		}
+
+		#region Nested type: DisposableEnumerator
+
+		internal class DisposableEnumerator : IDisposable, IEnumerator
+		{
+			private readonly IEnumerator wrapped;
+
+			public DisposableEnumerator(IEnumerable source)
+			{
+				wrapped = source.GetEnumerator();
+			}
+
+			#region IDisposable Members
+
+			public void Dispose()
+			{
+				var disposable = wrapped as IDisposable;
+				if (disposable != null)
+				{
+					disposable.Dispose();
+				}
+			}
+
+			#endregion
+
+			#region IEnumerator Members
+
+			public bool MoveNext()
+			{
+				return wrapped.MoveNext();
+			}
+
+			public void Reset()
+			{
+				wrapped.Reset();
+			}
+
+			public object Current
+			{
+				get { return wrapped.Current; }
+			}
+
+			#endregion
+		}
+
+		#endregion
+	}
+}
\ No newline at end of file

Modified: trunk/nhibernate/src/NHibernate.Test/NHibernate.Test.csproj
===================================================================
--- trunk/nhibernate/src/NHibernate.Test/NHibernate.Test.csproj	2010-12-15 18:29:52 UTC (rev 5315)
+++ trunk/nhibernate/src/NHibernate.Test/NHibernate.Test.csproj	2010-12-15 21:36:23 UTC (rev 5316)
@@ -580,6 +580,7 @@
     <Compile Include="TypesTest\XDocTypeFixture.cs" />
     <Compile Include="TypesTest\XmlDocClass.cs" />
     <Compile Include="TypesTest\XmlDocTypeFixture.cs" />
+    <Compile Include="UtilityTest\EnumerableExtensionsTests\AnyExtensionTests.cs" />
     <Compile Include="UtilityTest\ReflectionHelperIsMethodOfTests.cs" />
     <Compile Include="UtilityTest\ReflectionHelperTest.cs" />
     <Compile Include="Linq\RegresstionTests.cs" />

Added: trunk/nhibernate/src/NHibernate.Test/UtilityTest/EnumerableExtensionsTests/AnyExtensionTests.cs
===================================================================
--- trunk/nhibernate/src/NHibernate.Test/UtilityTest/EnumerableExtensionsTests/AnyExtensionTests.cs	                        (rev 0)
+++ trunk/nhibernate/src/NHibernate.Test/UtilityTest/EnumerableExtensionsTests/AnyExtensionTests.cs	2010-12-15 21:36:23 UTC (rev 5316)
@@ -0,0 +1,75 @@
+using System;
+using System.Collections;
+using NUnit.Framework;
+using NHibernate.Util;
+using SharpTestsEx;
+
+namespace NHibernate.Test.UtilityTest.EnumerableExtensionsTests
+{
+	public class AnyExtensionTests
+	{
+		[Test]
+		public void WhenEmptyListThenReturnFalse()
+		{
+			(new object[0]).Any().Should().Be.False();
+		}
+
+		[Test]
+		public void WhenNoEmptyListThenReturnTrue()
+		{
+			(new object[1]).Any().Should().Be.True();
+		}
+
+		private class MyDisposableList: IEnumerable
+		{
+			private readonly System.Action enumeratorDisposeCallback;
+
+			public MyDisposableList(System.Action enumeratorDisposeCallback)
+			{
+				this.enumeratorDisposeCallback = enumeratorDisposeCallback;
+			}
+
+			public IEnumerator GetEnumerator()
+			{
+				return new EmptyEnumerator(enumeratorDisposeCallback);
+			}
+		}
+
+		private class EmptyEnumerator : IEnumerator, IDisposable
+		{
+			private readonly System.Action disposeCallback;
+
+			public EmptyEnumerator(System.Action disposeCallback)
+			{
+				this.disposeCallback = disposeCallback;
+			}
+
+			public void Reset()
+			{
+			}
+
+			public object Current
+			{
+				get { throw new InvalidOperationException("EmptyEnumerator"); }
+			}
+
+			public bool MoveNext()
+			{
+				return false;
+			}
+
+			public void Dispose()
+			{
+				disposeCallback();
+			}
+		}
+
+		[Test]
+		public void WhenDisposableListThenCallDispose()
+		{
+			var disposeCalled = false;
+			(new MyDisposableList(()=> disposeCalled = true)).Any();
+			disposeCalled.Should().Be.True();
+		}
+	}
+}
\ No newline at end of file


This was sent by the SourceForge.net collaborative development platform, the world's largest Open Source development site.