THRIFT-1742 Optionally implement hashcode and equals in c#
Patch: Carl Yeksigian
diff --git a/lib/csharp/Makefile.am b/lib/csharp/Makefile.am
index 9b07f4f..f13f90a 100644
--- a/lib/csharp/Makefile.am
+++ b/lib/csharp/Makefile.am
@@ -19,6 +19,7 @@
THRIFTCODE= \
src/Collections/THashSet.cs \
+ src/Collections/TCollections.cs \
src/Properties/AssemblyInfo.cs \
src/Protocol/TAbstractBase.cs \
src/Protocol/TBase.cs \
diff --git a/lib/csharp/src/Collections/TCollections.cs b/lib/csharp/src/Collections/TCollections.cs
new file mode 100644
index 0000000..23fd8da
--- /dev/null
+++ b/lib/csharp/src/Collections/TCollections.cs
@@ -0,0 +1,94 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+using System;
+using System.Collections;
+
+namespace Thrift.Collections
+{
+ public class TCollections
+ {
+ /// <summary>
+ /// This will return true if the two collections are value-wise the same.
+ /// If the collection contains a collection, the collections will be compared using this method.
+ /// </summary>
+ public static bool Equals (IEnumerable first, IEnumerable second)
+ {
+ if (first == null && second == null)
+ {
+ return true;
+ }
+ if (first == null || second == null)
+ {
+ return false;
+ }
+ IEnumerator fiter = first.GetEnumerator ();
+ IEnumerator siter = second.GetEnumerator ();
+
+ bool fnext = fiter.MoveNext ();
+ bool snext = siter.MoveNext ();
+ while (fnext && snext)
+ {
+ IEnumerable fenum = fiter.Current as IEnumerable;
+ IEnumerable senum = siter.Current as IEnumerable;
+ if (fenum != null && senum != null)
+ {
+ if (!Equals(fenum, senum))
+ {
+ return false;
+ }
+ }
+ else if (fenum == null ^ senum == null)
+ {
+ return false;
+ }
+ else if (!Equals(fiter.Current, siter.Current))
+ {
+ return false;
+ }
+ fnext = fiter.MoveNext();
+ snext = siter.MoveNext();
+ }
+
+ return fnext == snext;
+ }
+
+ /// <summary>
+ /// This returns a hashcode based on the value of the enumerable.
+ /// </summary>
+ public static int GetHashCode (IEnumerable enumerable)
+ {
+ if (enumerable == null)
+ {
+ return 0;
+ }
+
+ int hashcode = 0;
+ foreach (Object obj in enumerable)
+ {
+ IEnumerable enum2 = obj as IEnumerable;
+ int objHash = enum2 == null ? obj.GetHashCode () : GetHashCode (enum2);
+ unchecked
+ {
+ hashcode = (hashcode * 397) ^ (objHash);
+ }
+ }
+ return hashcode;
+ }
+ }
+}
\ No newline at end of file
diff --git a/lib/csharp/src/Thrift.WP7.csproj b/lib/csharp/src/Thrift.WP7.csproj
index be38bc8..3d5b027 100644
--- a/lib/csharp/src/Thrift.WP7.csproj
+++ b/lib/csharp/src/Thrift.WP7.csproj
@@ -70,6 +70,7 @@
<Reference Include="System.Net" />
</ItemGroup>
<ItemGroup>
+ <Compile Include="Collections\TCollections.cs" />
<Compile Include="Collections\THashSet.cs" />
<Compile Include="Properties\AssemblyInfo.WP7.cs" />
<Compile Include="Protocol\TBase.cs" />
diff --git a/lib/csharp/src/Thrift.csproj b/lib/csharp/src/Thrift.csproj
index 0263d72..0722c18 100644
--- a/lib/csharp/src/Thrift.csproj
+++ b/lib/csharp/src/Thrift.csproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
@@ -77,6 +77,7 @@
<Reference Include="System.Web" />
</ItemGroup>
<ItemGroup>
+ <Compile Include="Collections\TCollections.cs" />
<Compile Include="Collections\THashSet.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
<Compile Include="Protocol\TAbstractBase.cs" />
@@ -137,4 +138,4 @@
<ProjectExtensions>
<VisualStudio AllowExistingFolder="true" />
</ProjectExtensions>
-</Project>
\ No newline at end of file
+</Project>