| /* |
| * 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.storage; |
| |
| import org.apache.wayang.commons.util.profiledb.model.Experiment; |
| |
| import java.io.*; |
| import java.net.URI; |
| import java.util.Arrays; |
| import java.util.Collection; |
| |
| public class FileStorage extends Storage { |
| |
| /** |
| * File where {@link Experiment}s will be written |
| */ |
| private File file; |
| |
| /** |
| * Assigns File where {@link Experiment}s will be written regarding to given URI |
| * |
| * @param uri URI where experiments are persisted |
| */ |
| public FileStorage(URI uri) { |
| |
| super(uri); |
| this.file = new File(uri); |
| } |
| |
| /** |
| * To change target URI during execution |
| * |
| * @param uri determines new URI where {@link Experiment}s will be persisted |
| */ |
| @Override |
| public void changeLocation(URI uri){ |
| |
| super.changeLocation(uri); |
| this.file = new File(uri); |
| } |
| |
| /** |
| * Write {@link Experiment}s to a {@link File}. Existing file contents will be overwritten. |
| * |
| * @param experiments the {@link Experiment}s |
| * @throws IOException if the writing fails |
| */ |
| @Override |
| public void save(Collection<Experiment> experiments) throws IOException { |
| this.file.getAbsoluteFile().getParentFile().mkdirs(); |
| try (FileOutputStream fos = new FileOutputStream(this.file, false)) { |
| this.save(experiments, fos); |
| } |
| } |
| |
| /** |
| * Write {@link Experiment}s to a {@link File}. Existing file contents will be overwritten. |
| * |
| * @param experiments the {@link Experiment}s |
| * @throws IOException if the writing fails |
| */ |
| @Override |
| public void save(Experiment... experiments) throws IOException { |
| this.save(Arrays.asList(experiments)); |
| } |
| |
| /** |
| * Load {@link Experiment}s from a {@link File}. |
| * |
| * @return the {@link Experiment}s |
| */ |
| @Override |
| public Collection<Experiment> load() throws IOException { |
| return load(new FileInputStream(this.file)); |
| } |
| |
| /** |
| * Append {@link Experiment}s to a {@link File}. Existing file contents will be preserved. |
| * |
| * @param experiments the {@link Experiment}s |
| * @throws IOException if the writing fails |
| */ |
| @Override |
| public void append(Collection<Experiment> experiments) throws IOException { |
| this.file.getAbsoluteFile().getParentFile().mkdirs(); |
| try (FileOutputStream fos = new FileOutputStream(this.file, true)) { |
| this.save(experiments, fos); |
| } |
| } |
| |
| /** |
| * Append {@link Experiment}s to a {@link File}. Existing file contents will be preserved. |
| * |
| * @param experiments the {@link Experiment}s |
| * @throws IOException if the writing fails |
| */ |
| @Override |
| public void append(Experiment... experiments) throws IOException { |
| this.append(Arrays.asList(experiments)); |
| } |
| |
| } |