| /* ==================================================================== |
| 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.poi.openxml4j.opc.internal; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.nio.channels.FileChannel; |
| |
| /** |
| * Provide useful method to manage file. |
| * |
| * @author Julien Chable |
| * @version 0.1 |
| */ |
| public final class FileHelper { |
| |
| /** |
| * Get the directory part of the specified file path. |
| * |
| * @param f |
| * File to process. |
| * @return The directory path from the specified |
| */ |
| public static File getDirectory(File f) { |
| if (f != null) { |
| String path = f.getPath(); |
| int len = path.length(); |
| int num2 = len; |
| while (--num2 >= 0) { |
| char ch1 = path.charAt(num2); |
| if (ch1 == File.separatorChar) { |
| return new File(path.substring(0, num2)); |
| } |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Copy a file. |
| * |
| * @param in |
| * The source file. |
| * @param out |
| * The target location. |
| * @throws IOException |
| * If an I/O error occur. |
| */ |
| public static void copyFile(File in, File out) throws IOException { |
| FileInputStream fis = new FileInputStream(in); |
| FileOutputStream fos = new FileOutputStream(out); |
| FileChannel sourceChannel = fis.getChannel(); |
| FileChannel destinationChannel = fos.getChannel(); |
| sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel); |
| sourceChannel.close(); |
| destinationChannel.close(); |
| fos.close(); |
| fis.close(); |
| } |
| |
| /** |
| * Get file name from the specified File object. |
| */ |
| public static String getFilename(File file) { |
| if (file != null) { |
| String path = file.getPath(); |
| int len = path.length(); |
| int num2 = len; |
| while (--num2 >= 0) { |
| char ch1 = path.charAt(num2); |
| if (ch1 == File.separatorChar) |
| return path.substring(num2 + 1, len); |
| } |
| } |
| return ""; |
| } |
| |
| } |