Mega Code Archive
Determines whether the collection contains the specified element
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/*
* 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.
*/
using System;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
namespace Spring.Util.Generic
{
/// <summary>
/// Miscellaneous generic collection utility methods.
/// </summary>
/// <remarks>
/// Mainly for internal use within the framework.
/// </remarks>
/// <author>Mark Pollack (.NET)</author>
public sealed class CollectionUtils
{
/// <summary>
/// Determines whether the <paramref name="collection"/> contains the specified <paramref name="element"/>.
/// </summary>
/// <param name="collection">The collection to check.</param>
/// <param name="element">The object to locate in the collection.</param>
/// <returns><see lang="true"/> if the element is in the collection, <see lang="false"/> otherwise.</returns>
public static bool Contains<T>(ICollection<T> collection, Object element)
{
if (collection == null)
{
throw new ArgumentNullException("Collection cannot be null.");
}
MethodInfo method;
method = collection.GetType().GetMethod("contains", BindingFlags.IgnoreCase | BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public);
if (null == method)
{
throw new InvalidOperationException("Collection type " + collection.GetType() + " does not implement a Contains() method.");
}
return (bool) method.Invoke(collection, new Object[] {element});
}
}
}
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