Determine whether a given collection only contains a single unique object
#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>
/// Determine whether a given collection only contains
/// a single unique object
/// </summary>
/// <param name="coll"></param>
/// <returns></returns>
public static bool HasUniqueObject(ICollection coll)
{
if (coll.Count == 0)
{
return false;
}
object candidate = null;
foreach (object elem in coll)
{
if (candidate == null)
{
candidate = elem;
}
else if (candidate != elem)
{
return false;
}
}
return true;
}
}
}