| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.hadoop.hdfs.server.namenode; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.protobuf.ByteString; |
| |
| import java.util.AbstractMap; |
| import java.util.Map; |
| |
| class FlatINodesInPath { |
| final ImmutableList<Map.Entry<ByteString, FlatINode>> inodes; |
| |
| FlatINodesInPath(ImmutableList<Map.Entry<ByteString, FlatINode>> inodes) { |
| this.inodes = inodes; |
| } |
| |
| public FlatINode getLastINode() { |
| return getLastINode(-1); |
| } |
| |
| FlatINode getLastINode(int offset) { |
| return inodes.get(inodes.size() + offset).getValue(); |
| } |
| |
| ByteString getLastPathComponent() { |
| return getLastPathComponent(-1); |
| } |
| |
| ByteString getLastPathComponent(int offset) { |
| return inodes.get(inodes.size() + offset).getKey(); |
| } |
| |
| String path() { |
| StringBuilder sb = new StringBuilder(); |
| boolean addPrefix = false; |
| for (Map.Entry<ByteString, FlatINode> p : inodes) { |
| if (addPrefix) { |
| sb.append('/'); |
| } |
| sb.append(p.getKey().toStringUtf8()); |
| addPrefix = true; |
| } |
| return sb.toString(); |
| } |
| |
| ImmutableList<Map.Entry<ByteString, FlatINode>> inodes() { |
| return inodes; |
| } |
| |
| public int length() { |
| return inodes.size(); |
| } |
| |
| static FlatINodesInPath concat( |
| FlatINodesInPath iip, Map.Entry<ByteString, FlatINode> last) { |
| ImmutableList<Map.Entry<ByteString, FlatINode>> l = ImmutableList.<Map.Entry<ByteString, FlatINode>>builder().addAll( |
| iip.inodes).add(last).build(); |
| return new FlatINodesInPath(l); |
| } |
| |
| static FlatINodesInPath addINode( |
| FlatINodesInPath iip, ByteString localName, FlatINode inode) { |
| return concat(iip, new AbstractMap.SimpleImmutableEntry<>(localName, inode)); |
| } |
| } |