java/openapi/src/com/intellij/openapi/module/LanguageLevelUtil.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.openapi.module;
  17
  18 import com.intellij.openapi.application.ApplicationManager;
  19 import com.intellij.openapi.roots.LanguageLevelModuleExtension;
  20 import com.intellij.openapi.roots.LanguageLevelProjectExtension;
  21 import com.intellij.openapi.vfs.VirtualFile;
  22 import com.intellij.pom.java.LanguageLevel;
  23 import org.jetbrains.annotations.NotNull;
  24
  25 /**
  26  * @author yole
  27  */
  28 public class LanguageLevelUtil {
  29   private LanguageLevelUtil() {
  30   }
  31
  32   @NotNull
  33   public static LanguageLevel getEffectiveLanguageLevel(@NotNull final Module module) {
  34     ApplicationManager.getApplication().assertReadAccessAllowed();
  35     LanguageLevel level = LanguageLevelModuleExtension.getInstance(module).getLanguageLevel();
  36     if (level != null) return level;
  37     return LanguageLevelProjectExtension.getInstance(module.getProject()).getLanguageLevel();
  38   }
  39
  40   @NotNull
  41   public static LanguageLevel getLanguageLevelForFile(final VirtualFile file) {
  42     if (file == null) return LanguageLevel.HIGHEST;
  43
  44     if (file.isDirectory()) {
  45       final LanguageLevel ll = file.getUserData(LanguageLevel.KEY);
  46       return ll != null ? ll : LanguageLevel.HIGHEST;
  47     }
  48
  49     return getLanguageLevelForFile(file.getParent());
  50   }
  51 }