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KSP implementation on Kotlin Analysis API

There is a newer version: 2.1.0-Beta1-1.0.25

// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
package com.intellij.psi;

import com.intellij.openapi.extensions.ExtensionPointName;
import com.intellij.psi.util.PsiUtil;
import com.intellij.psi.util.PsiUtilCore;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * @see com.intellij.codeInsight.JavaModuleSystemEx
 */
public interface JavaModuleSystem {
  ExtensionPointName EP_NAME = new ExtensionPointName<>("com.intellij.javaModuleSystem");

  @NotNull String getName();

  default boolean isAccessible(@NotNull PsiClass target, @NotNull PsiElement place) {
    PsiFile targetFile = target.getContainingFile();
    if (targetFile == null) return true;

    PsiUtilCore.ensureValid(targetFile);

    String packageName = PsiUtil.getPackageName(target);
    return packageName == null || isAccessible(packageName, targetFile, place);
  }

  boolean isAccessible(@NotNull String targetPackageName, @Nullable PsiFile targetFile, @NotNull PsiElement place);
}