| /* |
| * 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.wayang.commons.util.profiledb; |
| |
| import com.google.gson.Gson; |
| import com.google.gson.GsonBuilder; |
| import org.apache.wayang.commons.util.profiledb.json.MeasurementDeserializer; |
| import org.apache.wayang.commons.util.profiledb.json.MeasurementSerializer; |
| import org.apache.wayang.commons.util.profiledb.model.Experiment; |
| import org.apache.wayang.commons.util.profiledb.model.Measurement; |
| import org.apache.wayang.commons.util.profiledb.storage.Storage; |
| |
| import java.io.*; |
| import java.util.Collection; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.function.Consumer; |
| |
| /** |
| * This class provides facilities to save and load {@link Experiment}s. |
| */ |
| public class ProfileDB { |
| |
| /** |
| * Maintains the full list of {@link Class}es for {@link Measurement}s. Which are required for deserialization. |
| */ |
| private List<Class<? extends Measurement>> measurementClasses = new LinkedList<>(); |
| |
| /** |
| * Controls how conducted experiments will be persisted and loaded |
| */ |
| private Storage storage; |
| |
| /** |
| * Maintains actions to preparate {@link Gson}. |
| */ |
| private List<Consumer<GsonBuilder>> gsonPreparationSteps = new LinkedList<>(); |
| |
| /** |
| * Maintains a {@link Gson} object for efficiency. It will be dropped on changes, though. |
| */ |
| private Gson gson; |
| |
| /** |
| * Receive an array of {@link Experiment}s and persist them |
| * |
| * @param experiments Array of {@link Experiment}s to be persisted |
| * @throws IOException |
| */ |
| public void save(Experiment... experiments) throws IOException { |
| this.storage.save(experiments); |
| } |
| |
| /** |
| * Receive a Collection of {@link Experiment}s and persist them |
| * |
| * @param experiments Collection of {@link Experiment}s to be persisted |
| * @throws IOException |
| */ |
| public void save(Collection<Experiment> experiments) throws IOException { |
| this.storage.save(experiments); |
| } |
| |
| /** |
| * Receive a Collection of {@link Experiment}s and persist them |
| * |
| * @param experiments Collection of {@link Experiment}s to be persisted |
| * @param outputStream Indicates where the data must to be written |
| * @throws IOException |
| */ |
| public void save(Collection<Experiment> experiments, OutputStream outputStream) throws IOException { |
| this.storage.save(experiments, outputStream); |
| } |
| |
| /** |
| * Related to file based storage, Receive an array of {@link Experiment}s and persist them at the end of a file |
| * |
| * @param experiments Array of {@link Experiment}s to be persisted |
| * @throws IOException |
| */ |
| public void append(Experiment... experiments) throws IOException { |
| this.storage.append(experiments); |
| } |
| |
| /** |
| * Related to file based storage, Receive a Collection of {@link Experiment}s and persist them at the end of a file |
| * |
| * @param experiments Collection of {@link Experiment}s to be persisted |
| * @throws IOException |
| */ |
| public void append(Collection<Experiment> experiments) throws IOException { |
| this.storage.append(experiments); |
| } |
| |
| /** |
| * Bring {@link Experiment}s from current Storage to local variable |
| * |
| * @return Collection of {@link Experiment}s |
| * @throws IOException |
| */ |
| public Collection<Experiment> load() throws IOException { |
| return this.storage.load(); |
| } |
| |
| /** |
| * Bring {@link Experiment}s from current Storage to local variable |
| * |
| * @param inputStream Data to be read |
| * @return Collection of {@link Experiment}s |
| * @throws IOException |
| */ |
| public Collection<Experiment> load(InputStream inputStream) throws IOException { |
| return this.storage.load(inputStream); |
| } |
| |
| /** |
| * Creates a new instance. |
| */ |
| public ProfileDB(Storage storage) { |
| |
| this.storage = storage; |
| this.storage.setContext(this); |
| //this.measurementClasses.add(TimeMeasurement.class); |
| } |
| |
| /** |
| * To work with storage object provided to persist or load experiments |
| * |
| * @return Storage object proportioned for this instance |
| */ |
| public Storage getStorage() { |
| return storage; |
| } |
| |
| /** |
| * Register a {@link Measurement} type. This is required before being able to load that type. |
| * |
| * @param measurementClass the {@link Measurement} {@link Class} |
| * @return this instance |
| */ |
| public ProfileDB registerMeasurementClass(Class<? extends Measurement> measurementClass) { |
| this.measurementClasses.add(measurementClass); |
| this.gson = null; |
| return this; |
| } |
| |
| /** |
| * Apply any changes necessary to {@link Gson} so that it can be used for de/serialization of custom objects. |
| * |
| * @param preparation a preparatory step performed on a {@link GsonBuilder} |
| * @return this instance |
| */ |
| public ProfileDB withGsonPreparation(Consumer<GsonBuilder> preparation) { |
| this.gsonPreparationSteps.add(preparation); |
| this.gson = null; |
| return this; |
| } |
| |
| /** |
| * Provide a {@link Gson} object. |
| * |
| * @return the {@link Gson} object |
| */ |
| public Gson getGson() { |
| if (this.gson == null) { |
| MeasurementSerializer measurementSerializer = new MeasurementSerializer(); |
| MeasurementDeserializer measurementDeserializer = new MeasurementDeserializer(); |
| this.measurementClasses.forEach(measurementDeserializer::register); |
| final GsonBuilder gsonBuilder = new GsonBuilder() |
| .registerTypeAdapter(Measurement.class, measurementDeserializer) |
| .registerTypeAdapter(Measurement.class, measurementSerializer); |
| this.gsonPreparationSteps.forEach(step -> step.accept(gsonBuilder)); |
| this.gson = gsonBuilder.create(); |
| } |
| return this.gson; |
| } |
| |
| } |