java/java-impl/src/com/intellij/openapi/roots/impl/JavaLanguageLevelPusher.java

   1 package com.intellij.openapi.roots.impl;
   2
   3 import com.intellij.openapi.fileTypes.StdFileTypes;
   4 import com.intellij.openapi.module.LanguageLevelUtil;
   5 import com.intellij.openapi.module.Module;
   6 import com.intellij.openapi.project.Project;
   7 import com.intellij.openapi.util.Key;
   8 import com.intellij.openapi.vfs.VirtualFile;
   9 import com.intellij.openapi.vfs.newvfs.FileAttribute;
  10 import com.intellij.pom.java.LanguageLevel;
  11 import com.intellij.util.indexing.FileBasedIndex;
  12 import com.intellij.util.messages.MessageBus;
  13
  14 import java.io.DataInputStream;
  15 import java.io.DataOutputStream;
  16 import java.io.IOException;
  17
  18 import org.jetbrains.annotations.NotNull;
  19
  20 /**
  21  * @author Gregory.Shrago
  22  */
  23 public class JavaLanguageLevelPusher implements FilePropertyPusher<LanguageLevel> {
  24
  25   public static void pushLanguageLevel(final Project project) {
  26     PushedFilePropertiesUpdater.getInstance(project).pushAll(new JavaLanguageLevelPusher());
  27   }
  28
  29   public void initExtra(Project project, MessageBus bus, Engine languageLevelUpdater) {
  30     // nothing
  31   }
  32
  33   @NotNull
  34   public Key<LanguageLevel> getFileDataKey() {
  35     return LanguageLevel.KEY;
  36   }
  37
  38   public boolean pushDirectoriesOnly() {
  39     return true;
  40   }
  41
  42   public LanguageLevel getDefaultValue() {
  43     return LanguageLevel.HIGHEST;
  44   }
  45
  46   public LanguageLevel getImmediateValue(Project project, VirtualFile file) {
  47     return null;
  48   }
  49
  50   public LanguageLevel getImmediateValue(Module module) {
  51     return LanguageLevelUtil.getEffectiveLanguageLevel(module);
  52   }
  53
  54   public boolean acceptsFile(VirtualFile file) {
  55     return false;
  56   }
  57
  58   private static final FileAttribute PERSISTENCE = new FileAttribute("language_level_persistence", 1);
  59
  60   public void persistAttribute(VirtualFile fileOrDir, LanguageLevel level) throws IOException {
  61     final DataInputStream iStream = PERSISTENCE.readAttribute(fileOrDir);
  62     if (iStream != null) {
  63       try {
  64         final int oldLevelOrdinal = iStream.readInt();
  65         if (oldLevelOrdinal == level.ordinal()) return;
  66       }
  67       finally {
  68         iStream.close();
  69       }
  70     }
  71
  72     final DataOutputStream oStream = PERSISTENCE.writeAttribute(fileOrDir);
  73     oStream.writeInt(level.ordinal());
  74     oStream.close();
  75
  76     for (VirtualFile child : fileOrDir.getChildren()) {
  77       if (!child.isDirectory() && StdFileTypes.JAVA.equals(child.getFileType())) {
  78         FileBasedIndex.getInstance().requestReindex(child);
  79       }
  80     }
  81   }
  82 }