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// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
namespace WixToolset
{
using System;
using System.Collections.ObjectModel;
/// <summary>
/// A case-insensitive collection of unique <see cref="ProvidesDependency"/> objects.
/// </summary>
internal sealed class ProvidesDependencyCollection : KeyedCollection<string, ProvidesDependency>
{
/// <summary>
/// Creates a case-insensitive collection of unique <see cref="ProvidesDependency"/> objects.
/// </summary>
internal ProvidesDependencyCollection()
: base(StringComparer.InvariantCultureIgnoreCase)
{
}
/// <summary>
/// Adds the <see cref="ProvidesDependency"/> to the collection if it doesn't already exist.
/// </summary>
/// <param name="dependency">The <see cref="ProvidesDependency"/> to add to the collection.</param>
/// <returns>True if the <see cref="ProvidesDependency"/> was added to the collection; otherwise, false.</returns>
/// <exception cref="ArgumentNullException">The <paramref name="dependency"/> parameter is null.</exception>
internal bool Merge(ProvidesDependency dependency)
{
if (null == dependency)
{
throw new ArgumentNullException("dependency");
}
// If the dependency key is already in the collection, verify equality for a subset of properties.
if (this.Contains(dependency.Key))
{
ProvidesDependency current = this[dependency.Key];
if (!current.Equals(dependency))
{
return false;
}
}
base.Add(dependency);
return true;
}
/// <summary>
/// Gets the <see cref="ProvidesDependency.Key"/> for the <paramref name="dependency"/>.
/// </summary>
/// <param name="dependency">The dependency to index.</param>
/// <exception cref="ArgumentNullException">The <paramref name="dependency"/> parameter is null.</exception>
/// <returns>The <see cref="ProvidesDependency.Key"/> for the <paramref name="dependency"/>.</returns>
protected override string GetKeyForItem(ProvidesDependency dependency)
{
if (null == dependency)
{
throw new ArgumentNullException("dependency");
}
return dependency.Key;
}
}
}
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