using System;
using System.Collections.Generic;
using System.Linq;
using java.util;
using Microsoft.CodeAnalysis;
using JavaAst = com.github.javaparser.ast;
namespace JavaToCSharp;
public static class Extensions
{
///
/// Converts a Java Iterable to a .NET IEnumerable<T> and filters the elements of type T.
///
/// Type of items to be returned.
/// The java Iterable to be enumerated.
/// A filtered enumeration of items of type T
public static IEnumerable OfType(this java.lang.Iterable iterable)
{
var iterator = iterable.iterator();
while (iterator.hasNext())
{
if (iterator.next() is T item)
{
yield return item;
}
}
}
public static List? ToList(this java.util.List? list)
{
if (list == null)
return null;
var newList = new List();
for (int i = 0; i < list.size(); i++)
{
newList.Add((T)list.get(i));
}
return newList;
}
public static bool HasFlag(this java.util.EnumSet values, T flag) => values.contains(flag);
public static TSyntax? WithJavaComments(this TSyntax? syntax, ConversionContext context, JavaAst.Node? node, string? singleLineCommentEnd = null)
where TSyntax : SyntaxNode =>
context.Options.IncludeComments ? CommentsHelper.AddCommentsTrivias(syntax, node, singleLineCommentEnd) : syntax;
public static T? FromOptional(this Optional optional)
where T : class
=> optional.isPresent()
? optional.get() as T ??
throw new InvalidOperationException($"Optional did not convert to {typeof(T)}")
: null;
public static T FromRequiredOptional(this Optional optional)
where T : class
=> optional.isPresent()
? optional.get() as T ??
throw new InvalidOperationException($"Optional did not convert to {typeof(T)}")
: throw new InvalidOperationException("Required optional did not have a value");
public static ISet ToModifierKeywordSet(this JavaAst.NodeList nodeList)
=> nodeList.ToList()?.Select(i => i.getKeyword()).ToHashSet()
?? new HashSet();
}