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Copy pathExtensions.cs
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89 lines (75 loc) · 3.28 KB
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using System.Diagnostics.CodeAnalysis;
using java.util;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using JavaAst = com.github.javaparser.ast;
namespace JavaToCSharp;
public static class Extensions
{
/// <summary>
/// Converts a Java Iterable to a .NET IEnumerable<T> and filters the elements of type T.
/// </summary>
/// <typeparam name="T">Type of items to be returned.</typeparam>
/// <param name="iterable">The java Iterable to be enumerated.</param>
/// <returns>A filtered enumeration of items of type T</returns>
public static IEnumerable<T> OfType<T>(this java.lang.Iterable iterable)
{
var iterator = iterable.iterator();
while (iterator.hasNext())
{
if (iterator.next() is T item)
{
yield return item;
}
}
}
public static List<T>? ToList<T>(this java.util.List? list)
{
if (list == null)
return null;
var newList = new List<T>();
for (int i = 0; i < list.size(); i++)
{
newList.Add((T)list.get(i));
}
return newList;
}
public static bool HasFlag<T>(this java.util.EnumSet values, T flag) => values.contains(flag);
[return: NotNullIfNotNull(nameof(node))]
public static TSyntax? WithJavaComments<TSyntax>(this TSyntax? syntax,
ConversionContext context,
JavaAst.Node? node)
where TSyntax : SyntaxNode
=> context.Options.IncludeComments
? CommentsHelper.AddCommentsTrivias(syntax, node)
: syntax;
public static CompilationUnitSyntax WithPackageFileComments(this CompilationUnitSyntax syntax,
ConversionContext context,
JavaAst.CompilationUnit compilationUnit,
JavaAst.PackageDeclaration? packageDeclaration)
=> context.Options.IncludeComments
? CommentsHelper.AddPackageComments(syntax, compilationUnit, packageDeclaration)
: syntax;
public static T? FromOptional<T>(this Optional optional)
where T : class
=> optional.isPresent()
? optional.get() as T ??
throw new InvalidOperationException($"Optional did not convert to {typeof(T)}")
: null;
public static T FromRequiredOptional<T>(this Optional optional)
where T : class
=> optional.isPresent()
? optional.get() as T ??
throw new InvalidOperationException($"Optional did not convert to {typeof(T)}")
: throw new InvalidOperationException("Required optional did not have a value");
public static ISet<JavaAst.Modifier.Keyword> ToModifierKeywordSet(this JavaAst.NodeList nodeList)
=> nodeList.ToList<JavaAst.Modifier>()?.Select(i => i.getKeyword()).ToHashSet()
?? new HashSet<JavaAst.Modifier.Keyword>();
public static TSyntax WithLeadingNewLines<TSyntax>(this TSyntax syntax, int count = 1)
where TSyntax : SyntaxNode
=> syntax.WithLeadingTrivia(Enumerable.Repeat(Whitespace.NewLine, count));
public static TSyntax WithTrailingNewLines<TSyntax>(this TSyntax syntax, int count = 1)
where TSyntax : SyntaxNode
=> syntax.WithTrailingTrivia(Enumerable.Repeat(Whitespace.NewLine, count));
}