| /** |
| * 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.tools.rumen.datatypes; |
| |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.util.StringTokenizer; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.tools.rumen.anonymization.WordList; |
| import org.apache.hadoop.tools.rumen.anonymization.WordListAnonymizerUtility; |
| import org.apache.hadoop.tools.rumen.state.State; |
| import org.apache.hadoop.tools.rumen.state.StatePool; |
| import org.apache.hadoop.util.StringUtils; |
| |
| /** |
| * Represents a file's location. |
| * |
| * Currently, only filenames that can be represented using {@link Path} are |
| * supported. |
| */ |
| public class FileName implements AnonymizableDataType<String> { |
| private final String fileName; |
| private String anonymizedFileName; |
| private static final String PREV_DIR = ".."; |
| private static final String[] KNOWN_SUFFIXES = |
| new String[] {".xml", ".jar", ".txt", ".tar", ".zip", ".json", ".gzip", |
| ".lzo"}; |
| |
| /** |
| * A composite state for filename. |
| */ |
| public static class FileNameState implements State { |
| private WordList dirState = new WordList("dir"); |
| private WordList fileNameState = new WordList("file"); |
| |
| @Override |
| public boolean isUpdated() { |
| return dirState.isUpdated() || fileNameState.isUpdated(); |
| } |
| |
| public WordList getDirectoryState() { |
| return dirState; |
| } |
| |
| public WordList getFileNameState() { |
| return fileNameState; |
| } |
| |
| public void setDirectoryState(WordList state) { |
| this.dirState = state; |
| } |
| |
| public void setFileNameState(WordList state) { |
| this.fileNameState = state; |
| } |
| |
| @Override |
| public String getName() { |
| return "path"; |
| } |
| |
| @Override |
| public void setName(String name) { |
| // for now, simply assert since this class has a hardcoded name |
| if (!getName().equals(name)) { |
| throw new RuntimeException("State name mismatch! Expected '" |
| + getName() + "' but found '" + name + "'."); |
| } |
| } |
| } |
| |
| public FileName(String fileName) { |
| this.fileName = fileName; |
| } |
| |
| @Override |
| public String getValue() { |
| return fileName; |
| } |
| |
| @Override |
| public String getAnonymizedValue(StatePool statePool, |
| Configuration conf) { |
| if (anonymizedFileName == null) { |
| anonymize(statePool, conf); |
| } |
| return anonymizedFileName; |
| } |
| |
| private void anonymize(StatePool statePool, Configuration conf) { |
| FileNameState fState = (FileNameState) statePool.getState(getClass()); |
| if (fState == null) { |
| fState = new FileNameState(); |
| statePool.addState(getClass(), fState); |
| } |
| |
| String[] files = StringUtils.split(fileName); |
| String[] anonymizedFileNames = new String[files.length]; |
| int i = 0; |
| for (String f : files) { |
| anonymizedFileNames[i++] = |
| anonymize(statePool, conf, fState, f); |
| } |
| |
| anonymizedFileName = StringUtils.arrayToString(anonymizedFileNames); |
| } |
| |
| private static String anonymize(StatePool statePool, Configuration conf, |
| FileNameState fState, String fileName) { |
| String ret = null; |
| try { |
| URI uri = new URI(fileName); |
| |
| // anonymize the path i.e without the authority & scheme |
| ret = |
| anonymizePath(uri.getPath(), fState.getDirectoryState(), |
| fState.getFileNameState()); |
| |
| // anonymize the authority and scheme |
| String authority = uri.getAuthority(); |
| String scheme = uri.getScheme(); |
| if (scheme != null) { |
| String anonymizedAuthority = ""; |
| if (authority != null) { |
| // anonymize the authority |
| NodeName hostName = new NodeName(null, uri.getHost()); |
| anonymizedAuthority = hostName.getAnonymizedValue(statePool, conf); |
| } |
| ret = scheme + "://" + anonymizedAuthority + ret; |
| } |
| } catch (URISyntaxException use) { |
| throw new RuntimeException (use); |
| } |
| |
| return ret; |
| } |
| |
| // Anonymize the file-path |
| private static String anonymizePath(String path, WordList dState, |
| WordList fState) { |
| StringBuilder buffer = new StringBuilder(); |
| StringTokenizer tokenizer = new StringTokenizer(path, Path.SEPARATOR, true); |
| while (tokenizer.hasMoreTokens()) { |
| String token = tokenizer.nextToken(); |
| if (Path.SEPARATOR.equals(token)) { |
| buffer.append(token); |
| } else if (Path.CUR_DIR.equals(token)) { |
| buffer.append(token); |
| } else if (PREV_DIR.equals(token)) { |
| buffer.append(token); |
| } else if (tokenizer.hasMoreTokens()){ |
| // this component is a directory |
| buffer.append(anonymize(token, dState)); |
| } else { |
| // this component is a file |
| buffer.append(anonymize(token, fState)); |
| } |
| } |
| |
| return buffer.toString(); |
| } |
| |
| //TODO There is no caching for saving memory. |
| private static String anonymize(String data, WordList wordList) { |
| if (data == null) { |
| return null; |
| } |
| |
| if (WordListAnonymizerUtility.needsAnonymization(data)) { |
| String suffix = ""; |
| String coreData = data; |
| // check and extract suffix |
| if (WordListAnonymizerUtility.hasSuffix(data, KNOWN_SUFFIXES)) { |
| // check if the data ends with a known suffix |
| String[] split = |
| WordListAnonymizerUtility.extractSuffix(data, KNOWN_SUFFIXES); |
| suffix = split[1]; |
| coreData = split[0]; |
| } |
| |
| // check if the data is known content |
| //TODO [Chunking] Do this for sub-strings of data |
| String anonymizedData = coreData; |
| if (!WordListAnonymizerUtility.isKnownData(coreData)) { |
| if (!wordList.contains(coreData)) { |
| wordList.add(coreData); |
| } |
| anonymizedData = wordList.getName() + wordList.indexOf(coreData); |
| } |
| |
| return anonymizedData + suffix; |
| } else { |
| return data; |
| } |
| } |
| } |