| /* |
| * 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. |
| */ |
| |
| namespace Apache.Ignite.Linq.Impl |
| { |
| using System; |
| using System.Collections; |
| using System.Collections.Generic; |
| using System.Diagnostics; |
| using System.Linq; |
| |
| /// <summary> |
| /// Contains static methods to work with IEnumerable |
| /// </summary> |
| internal static class EnumerableHelper |
| { |
| /// <summary> |
| /// Gets item type of enumerable |
| /// </summary> |
| public static Type GetIEnumerableItemType(Type type) |
| { |
| Debug.Assert(type != null); |
| |
| if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(IEnumerable<>)) |
| { |
| return type.GetGenericArguments()[0]; |
| } |
| |
| var implementedIEnumerableType = type.GetInterfaces() |
| .FirstOrDefault(t => t.IsGenericType && t.GetGenericTypeDefinition() == typeof(IEnumerable<>)); |
| |
| if (implementedIEnumerableType != null) |
| { |
| return implementedIEnumerableType.GetGenericArguments()[0]; |
| } |
| |
| if (type == typeof(IEnumerable)) |
| { |
| return typeof(object); |
| } |
| |
| throw new NotSupportedException("Type is not IEnumerable: " + type.FullName); |
| } |
| } |
| } |