// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

namespace Microsoft.Build.Evaluation
{
    /// <summary>
    /// Table of metadata useable to expand expressions
    /// </summary>
    internal interface IMetadataTable
    {
        /// <summary>
        /// Retrieves any value we have in our metadata table for the metadata name specified.
        /// If no value is available, returns empty string.
        /// </summary>
        string GetEscapedValue(string name);

        /// <summary>
        /// Retrieves any value we have in our metadata table for the metadata name and item type specified.
        /// If item type is null, it is ignored.
        /// If no value is available, returns empty string.
        /// </summary>
        string GetEscapedValue(string? itemType, string name);

        /// <summary>
        /// Returns the value if it exists, null otherwise.
        /// If item type is null, it is ignored.
        /// </summary>
        string? GetEscapedValueIfPresent(string? itemType, string name);
    }
}