/*
 * Copyright 2016 The Bazel Authors. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.google.idea.blaze.base.lang.buildfile.search;

import com.intellij.openapi.extensions.ExtensionPointName;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import javax.annotation.Nullable;

/**
 * Checks if the PsiElement represents a top-level PsiFile (e.g. a top-level java PsiClass can be
 * interchanged with the corresponding PsiFile, when searching for usages).
 */
public interface PsiFileProvider {

  ExtensionPointName<PsiFileProvider> EP_NAME =
      ExtensionPointName.create("com.google.idea.blaze.PsiFileProvider");

  @Nullable
  PsiFile asFileSearch(PsiElement elementToSearch);
}