/*
 * Copyright 2000-2012 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.refactoring.util;

import com.intellij.ide.highlighter.JavaClassFileType;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.openapi.vfs.WritingAccessProvider;
import org.jetbrains.annotations.NotNull;

import java.util.Collection;
import java.util.Collections;

/**
 * User: ksafonov
 */
public class ClsElementWritingAccessProvider extends WritingAccessProvider {

  @NotNull
  @Override
  public Collection<VirtualFile> requestWriting(final VirtualFile... files) {
    return Collections.emptyList();
  }

  @Override
  public boolean isPotentiallyWritable(@NotNull final VirtualFile file) {
    // TODO make library class files readonly not by their file type but by location in library roots
    return file.getFileType() != JavaClassFileType.INSTANCE;
  }
}

@@ -658,41 +658,33 @@
 lij.
-ide.highlighter.JavaClassFileType
+openapi.vfs.JarFileSystem
 ;%0Aim
@@ -1224,165 +1224,79 @@
     
-// TODO make library class files readonly not by their file type but by location in library roots%0A    return file.getFileType() != JavaClassFileType.INSTANCE
+return JarFileSystem.getInstance().getLocalVirtualFileFor(file) == null
 ;%0A  

disable inside jar file system (IDEA-148128)