| /** |
| * 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 org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.tools.rumen.anonymization.WordList; |
| import org.apache.hadoop.tools.rumen.anonymization.WordListAnonymizerUtility; |
| import org.apache.hadoop.tools.rumen.state.StatePool; |
| |
| /** |
| * Represents a default anonymizable Rumen data-type. It uses |
| * {@link WordListAnonymizerUtility} for anonymization. |
| */ |
| public abstract class DefaultAnonymizableDataType |
| implements AnonymizableDataType<String> { |
| private static final String DEFAULT_PREFIX = "data"; |
| |
| protected String getPrefix() { |
| return DEFAULT_PREFIX; |
| } |
| |
| // Determines if the contained data needs anonymization |
| protected boolean needsAnonymization(Configuration conf) { |
| return true; |
| } |
| |
| @Override |
| public final String getAnonymizedValue(StatePool statePool, |
| Configuration conf) { |
| if (needsAnonymization(conf)) { |
| WordList state = (WordList) statePool.getState(getClass()); |
| if (state == null) { |
| state = new WordList(getPrefix()); |
| statePool.addState(getClass(), state); |
| } |
| return anonymize(getValue(), state); |
| } else { |
| return getValue(); |
| } |
| } |
| |
| private static String anonymize(String data, WordList wordList) { |
| if (data == null) { |
| return null; |
| } |
| |
| if (!wordList.contains(data)) { |
| wordList.add(data); |
| } |
| return wordList.getName() + wordList.indexOf(data); |
| } |
| } |