Reflection util for IntelliJ plugins to reflect over project libraries

LibraryReflectionUtil.java

import com.intellij.openapi.project.Project;
import com.intellij.openapi.roots.libraries.LibraryUtil;
import com.intellij.util.containers.WeakHashMap;

import java.lang.annotation.Annotation;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.StreamSupport;

public class LibraryReflectionUtil {
	private static WeakHashMap<Project, LibraryReflectionUtil> projectIntances = new WeakHashMap<>();
	private ClassLoader loader;
	private Reflections reflections;

	public static void initForProject(Project project) {
		LibraryReflectionUtil result = projectIntances.get(project);
		if(result == null) {
			List<URL> collect = StreamSupport.stream(Arrays.spliterator(LibraryUtil.getLibraryRoots(project)), false).map(f -> {
				try {
					if(f.getCanonicalPath() != null)
						return new URL(f.getCanonicalPath());
				} catch (MalformedURLException ignored) {

				}
				return null;
			}).filter(f -> f != null).collect(Collectors.toList());
			ClassLoader loader = URLClassLoader.newInstance(
					(URL[]) collect.toArray(),
					LibraryReflectionUtil.class.getClassLoader());

			LibraryReflectionUtil reflectionUtil = new LibraryReflectionUtil();
			reflectionUtil.loader = loader;
			reflectionUtil.init();
			projectIntances.put(project, reflectionUtil);
		}
	}

	private LibraryReflectionUtil() { }

	public static LibraryReflectionUtil getInstance(Project project) {
		return projectIntances.get(project);
	}
}