import java.util.function.Consumer;
import java.util.function.Supplier;

public class FilteredFileTree extends CompositeFileTree implements FileCollectionInternal.Source {
    private final FileTreeInternal tree;
    private final Supplier<? extends PatternSet> patternSupplier;

import org.gradle.api.internal.file.FileCollectionStructureVisitor
import org.gradle.api.internal.file.FileOperations
import org.gradle.api.internal.file.FileTreeInternal
import org.gradle.api.internal.file.FilteredFileTree
import org.gradle.api.internal.file.archive.TarFileTree
import org.gradle.api.internal.file.archive.ZipFileTree
import org.gradle.api.internal.file.collections.DirectoryFileTree

        visitChildren(child -> visitor.accept((FileTreeInternal) child));
    }

    private FileTreeInternal newFilteredFileTree(Supplier<? extends PatternSet> patternSetSupplier) {
        return new FilteredFileTree(this, taskDependencyFactory, patternSetFactory, patternSetSupplier);
    }

    }

    public AbstractFileCollection getCollection() {
        return collection;
    }

    @Override
    public FileTreeInternal matching(PatternFilterable patterns) {
        return new FilteredFileTree(this, taskDependencyFactory, patternSetFactory, () -> {
            PatternSet patternSet = patternSetFactory.create();
            patternSet.copyFrom(patterns);
            return patternSet;
        });
    }