| /* |
| * 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.samoa.streams.fs; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FilenameFilter; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Source for FileStream for local files |
| * |
| * @author Casey |
| */ |
| public class LocalFileStreamSource implements FileStreamSource { |
| /** |
| * |
| */ |
| private static final long serialVersionUID = 3986511547525870698L; |
| |
| private transient InputStream fileStream; |
| private List<String> filePaths; |
| private int currentIndex; |
| |
| public LocalFileStreamSource() { |
| this.currentIndex = -1; |
| } |
| |
| public void init(String path, String ext) { |
| this.filePaths = new ArrayList<>(); |
| File fileAtPath = new File(path); |
| if (fileAtPath.isDirectory()) { |
| File[] filesInDir = fileAtPath.listFiles(new FileExtensionFilter(ext)); |
| for (File aFilesInDir : filesInDir) { |
| filePaths.add(aFilesInDir.getAbsolutePath()); |
| } |
| } |
| else { |
| this.filePaths.add(path); |
| } |
| this.currentIndex = -1; |
| } |
| |
| public void reset() throws IOException { |
| this.currentIndex = -1; |
| this.closeFileStream(); |
| } |
| |
| private void closeFileStream() { |
| if (fileStream != null) { |
| try { |
| fileStream.close(); |
| } catch (IOException ioe) { |
| ioe.printStackTrace(); |
| } |
| } |
| } |
| |
| public InputStream getNextInputStream() { |
| this.closeFileStream(); |
| |
| if (this.currentIndex >= (this.filePaths.size() - 1)) |
| return null; |
| |
| this.currentIndex++; |
| String filePath = this.filePaths.get(currentIndex); |
| |
| File file = new File(filePath); |
| try { |
| fileStream = new FileInputStream(file); |
| } catch (IOException ioe) { |
| this.closeFileStream(); |
| throw new RuntimeException("Failed opening file:" + filePath, ioe); |
| } |
| |
| return fileStream; |
| } |
| |
| public InputStream getCurrentInputStream() { |
| return fileStream; |
| } |
| |
| protected int getFilePathListSize() { |
| if (filePaths != null) |
| return filePaths.size(); |
| return 0; |
| } |
| |
| protected String getFilePathAt(int index) { |
| if (filePaths != null && filePaths.size() > index) |
| return filePaths.get(index); |
| return null; |
| } |
| |
| private class FileExtensionFilter implements FilenameFilter { |
| private String extension; |
| |
| FileExtensionFilter(String ext) { |
| extension = ext; |
| } |
| |
| @Override |
| public boolean accept(File dir, String name) { |
| File f = new File(dir, name); |
| if (extension == null) |
| return f.isFile(); |
| else |
| return f.isFile() && name.toLowerCase().endsWith("." + extension); |
| } |
| } |
| } |