/// <summary>
/// Returns a copy of the given set as a <seealso cref="CharArraySet"/>. If the given set
/// is a <seealso cref="CharArraySet"/> the ignoreCase property will be preserved.
/// <para>
/// <b>Note:</b> If you intend to create a copy of another <seealso cref="CharArraySet"/> where
/// the <seealso cref="LuceneVersion"/> of the source set differs from its copy
/// <seealso cref="#CharArraySet(Version, Collection, boolean)"/> should be used instead.
/// The <seealso cref="#copy(Version, Set)"/> will preserve the <seealso cref="LuceneVersion"/> of the
/// source set it is an instance of <seealso cref="CharArraySet"/>.
/// </para>
/// </summary>
/// <param name="matchVersion">
/// compatibility match version see <a href="#version">Version
/// note</a> above for details. This argument will be ignored if the
/// given set is a <seealso cref="CharArraySet"/>. </param>
/// <param name="set">
/// a set to copy </param>
/// <returns> a copy of the given set as a <seealso cref="CharArraySet"/>. If the given set
/// is a <seealso cref="CharArraySet"/> the ignoreCase property as well as the
/// matchVersion will be of the given set will be preserved. </returns>
public static CharArraySet Copy <T1>(LuceneVersion matchVersion, HashSet <T1> set)
{
if (set == EMPTY_SET)
{
return(EMPTY_SET);
}
if (set is CharArraySet)
{
CharArraySet source = (CharArraySet)set;
return(new CharArraySet(CharArrayMap.copy(source.map.matchVersion, source.map)));
}
return(new CharArraySet(matchVersion, set, false));
}
