| /* |
| * Copyright 2000-2014 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. |
| */ |
| |
| /* |
| * @author max |
| */ |
| package com.intellij.openapi.vfs.newvfs; |
| |
| import com.intellij.openapi.util.io.FileUtil; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| public class FileAttribute { |
| private static final Set<String> ourRegisteredIds = new HashSet<String>(); |
| private final String myId; |
| private final int myVersion; |
| private final boolean myFixedSize; |
| |
| /** |
| * @deprecated |
| * @see #FileAttribute(String, int, boolean) |
| */ |
| public FileAttribute(@NonNls @NotNull String id, int version) { |
| this(id, version, false); |
| } |
| |
| public FileAttribute(@NonNls @NotNull String id, int version, boolean fixedSize) { |
| this(version, fixedSize, id); |
| boolean added = ourRegisteredIds.add(id); |
| assert added : "Attribute id='" + id+ "' is not unique"; |
| } |
| |
| private FileAttribute(int version, boolean fixedSize,@NotNull String id) { |
| myId = id; |
| myVersion = version; |
| myFixedSize = fixedSize; |
| } |
| |
| @Nullable |
| public DataInputStream readAttribute(@NotNull VirtualFile file) { |
| return ManagingFS.getInstance().readAttribute(file, this); |
| } |
| |
| @NotNull |
| public DataOutputStream writeAttribute(@NotNull VirtualFile file) { |
| return ManagingFS.getInstance().writeAttribute(file, this); |
| } |
| |
| @Nullable |
| public byte[] readAttributeBytes(VirtualFile file) throws IOException { |
| final DataInputStream stream = readAttribute(file); |
| if (stream == null) return null; |
| |
| try { |
| int len = stream.readInt(); |
| return FileUtil.loadBytes(stream, len); |
| } |
| finally { |
| stream.close(); |
| } |
| } |
| |
| public void writeAttributeBytes(VirtualFile file, @NotNull byte[] bytes) throws IOException { |
| writeAttributeBytes(file, bytes, 0, bytes.length); |
| } |
| |
| public void writeAttributeBytes(VirtualFile file, byte[] bytes, int offset, int len) throws IOException { |
| final DataOutputStream stream = writeAttribute(file); |
| try { |
| stream.writeInt(len); |
| stream.write(bytes, offset, len); |
| } |
| finally { |
| stream.close(); |
| } |
| } |
| |
| @NotNull |
| public String getId() { |
| return myId; |
| } |
| |
| public boolean isFixedSize() { |
| return myFixedSize; |
| } |
| |
| @NotNull |
| public FileAttribute newVersion(int newVersion) { |
| return new FileAttribute(newVersion, myFixedSize, myId); |
| } |
| |
| public int getVersion() { |
| return myVersion; |
| } |
| } |