| /* |
| * 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.commons.compress.parallel; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.nio.file.Files; |
| |
| /** |
| * ScatterGatherBackingStore that is backed by a file. |
| * |
| * @since 1.10 |
| */ |
| public class FileBasedScatterGatherBackingStore implements ScatterGatherBackingStore { |
| private final File target; |
| private final OutputStream os; |
| private boolean closed; |
| |
| public FileBasedScatterGatherBackingStore(final File target) throws FileNotFoundException { |
| this.target = target; |
| try { |
| os = Files.newOutputStream(target.toPath()); |
| } catch (final FileNotFoundException ex) { |
| throw ex; |
| } catch (final IOException ex) { |
| // must convert exception to stay backwards compatible with Compress 1.10 to 1.13 |
| throw new RuntimeException(ex); // NOSONAR |
| } |
| } |
| |
| @Override |
| public InputStream getInputStream() throws IOException { |
| return Files.newInputStream(target.toPath()); |
| } |
| |
| @Override |
| @SuppressWarnings("ResultOfMethodCallIgnored") |
| public void closeForWriting() throws IOException { |
| if (!closed) { |
| os.close(); |
| closed = true; |
| } |
| } |
| |
| @Override |
| public void writeOut(final byte[] data, final int offset, final int length) throws IOException { |
| os.write(data, offset, length); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| try { |
| closeForWriting(); |
| } finally { |
| if (target.exists() && !target.delete()) { |
| target.deleteOnExit(); |
| } |
| } |
| } |
| } |