Finds a value of the given type in the given collection. : ICollection « Collections Data Structure « C# / C Sharp

1. C# / C Sharp
2. Collections Data Structure
3. ICollection

Finds a value of the given type in the given collection.

  

#region License

/*
 * Copyright 2002-2005 the original author or authors.
 * 
 * Licensed 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.
 */

#endregion

#region Imports

using System;
using System.Collections;
using System.Reflection;

#endregion

namespace Spring.Util
{
    /// <summary>
    /// Miscellaneous collection utility methods.
    /// </summary>
    /// <remarks>
    /// Mainly for internal use within the framework.
    /// </remarks>
    /// <author>Mark Pollack (.NET)</author>
    public sealed class CollectionUtils
    {
        /// <summary>
        /// Finds a value of the given type in the given collection.
        /// </summary>
        /// <param name="collection">The collection to search.</param>
        /// <param name="type">The type to look for.</param>
        /// <returns>a value of the given type found, or null if none.</returns>
        /// <exception cref="ArgumentException">If more than one value of the given type is found</exception>
        public static object FindValueOfType(ICollection collection, Type type)
        {

            Type typeToUse = (type != null ? type : typeof(object));
            object val = null;
            foreach (object obj in collection)
            {
                if (typeToUse.IsAssignableFrom(obj.GetType()))
                {
                    if (val != null)
                    {
                        throw new ArgumentException("More than one value of type[" + typeToUse.Name + "] found.");
                    }
                    val = obj;
                }
            }
            return val;
        }
    }
}

   
    
  

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