2009-05-20 04:02:35 -04:00
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/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.openxml4j.opc.internal;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.nio.channels.FileChannel;
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/**
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* Provide useful method to manage file.
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*
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* @author Julien Chable
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* @version 0.1
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*/
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public final class FileHelper {
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/**
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* Get the directory part of the specified file path.
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*
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* @param f
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* File to process.
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* @return The directory path from the specified
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*/
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public static File getDirectory(File f) {
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if (f != null) {
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String path = f.getPath();
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int len = path.length();
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int num2 = len;
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while (--num2 >= 0) {
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char ch1 = path.charAt(num2);
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if (ch1 == File.separatorChar) {
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return new File(path.substring(0, num2));
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}
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}
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}
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return null;
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}
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/**
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* Copy a file.
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*
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* @param in
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* The source file.
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* @param out
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* The target location.
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* @throws IOException
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* If an I/O error occur.
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*/
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public static void copyFile(File in, File out) throws IOException {
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FileChannel sourceChannel = new FileInputStream(in).getChannel();
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FileChannel destinationChannel = new FileOutputStream(out).getChannel();
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sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel);
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sourceChannel.close();
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destinationChannel.close();
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}
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/**
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* Get file name from the specified File object.
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*/
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public static String getFilename(File file) {
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if (file != null) {
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String path = file.getPath();
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int len = path.length();
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int num2 = len;
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while (--num2 >= 0) {
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char ch1 = path.charAt(num2);
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if (ch1 == File.separatorChar)
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return path.substring(num2 + 1, len);
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}
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}
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return "";
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}
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}
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