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/*
* Copyright 2000-2009 JetBrains s.r.o.
*
* 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.intellij.openapi.roots.impl;
import com.intellij.openapi.fileTypes.StdFileTypes;
import com.intellij.openapi.module.LanguageLevelUtil;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.roots.ProjectFileIndex;
import com.intellij.openapi.util.Key;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.openapi.vfs.newvfs.FileAttribute;
import com.intellij.pom.java.LanguageLevel;
import com.intellij.util.io.DataInputOutputUtil;
import com.intellij.util.messages.MessageBus;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
/**
* @author Gregory.Shrago
*/
public class JavaLanguageLevelPusher implements FilePropertyPusher<LanguageLevel> {
public static void pushLanguageLevel(final Project project) {
PushedFilePropertiesUpdater.getInstance(project).pushAll(new JavaLanguageLevelPusher());
}
@Override
public void initExtra(@NotNull Project project, @NotNull MessageBus bus, @NotNull Engine languageLevelUpdater) {
// nothing
}
@Override
@NotNull
public Key<LanguageLevel> getFileDataKey() {
return LanguageLevel.KEY;
}
@Override
public boolean pushDirectoriesOnly() {
return true;
}
@Override
@NotNull
public LanguageLevel getDefaultValue() {
return LanguageLevel.HIGHEST;
}
@Override
public LanguageLevel getImmediateValue(@NotNull Project project, @Nullable VirtualFile file) {
return null;
}
@Override
public LanguageLevel getImmediateValue(@NotNull Module module) {
return LanguageLevelUtil.getEffectiveLanguageLevel(module);
}
@Override
public boolean acceptsFile(@NotNull VirtualFile file) {
return false;
}
@Override
public boolean acceptsDirectory(@NotNull VirtualFile file, @NotNull Project project) {
return ProjectFileIndex.SERVICE.getInstance(project).isInSourceContent(file);
}
private static final FileAttribute PERSISTENCE = new FileAttribute("language_level_persistence", 3, true);
@Override
public void persistAttribute(@NotNull VirtualFile fileOrDir, @NotNull LanguageLevel level) throws IOException {
final DataInputStream iStream = PERSISTENCE.readAttribute(fileOrDir);
if (iStream != null) {
try {
final int oldLevelOrdinal = DataInputOutputUtil.readINT(iStream);
if (oldLevelOrdinal == level.ordinal()) return;
}
finally {
iStream.close();
}
}
final DataOutputStream oStream = PERSISTENCE.writeAttribute(fileOrDir);
DataInputOutputUtil.writeINT(oStream, level.ordinal());
oStream.close();
for (VirtualFile child : fileOrDir.getChildren()) {
if (!child.isDirectory() && StdFileTypes.JAVA.equals(child.getFileType())) {
PushedFilePropertiesUpdater.filePropertiesChanged(child);
}
}
}
@Override
public void afterRootsChanged(@NotNull Project project) {
}
}
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