/*
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* Copyright 2011 gitblit.com.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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 com.gitblit.utils;
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import java.io.BufferedInputStream;
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import java.io.BufferedReader;
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import java.io.BufferedWriter;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.OutputStreamWriter;
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import java.nio.charset.Charset;
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/**
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* Common file utilities.
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*
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* @author James Moger
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*
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*/
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public class FileUtils {
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/**
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* Returns the string content of the specified file.
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*
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* @param file
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* @param lineEnding
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* @return the string content of the file
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*/
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public static String readContent(File file, String lineEnding) {
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StringBuilder sb = new StringBuilder();
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try {
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InputStreamReader is = new InputStreamReader(new FileInputStream(file),
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Charset.forName("UTF-8"));
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BufferedReader reader = new BufferedReader(is);
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String line = null;
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while ((line = reader.readLine()) != null) {
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sb.append(line);
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if (lineEnding != null) {
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sb.append(lineEnding);
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}
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}
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reader.close();
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} catch (Throwable t) {
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System.err.println("Failed to read content of " + file.getAbsolutePath());
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t.printStackTrace();
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}
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return sb.toString();
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}
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/**
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* Writes the string content to the file.
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*
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* @param file
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* @param content
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*/
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public static void writeContent(File file, String content) {
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try {
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OutputStreamWriter os = new OutputStreamWriter(new FileOutputStream(file),
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Charset.forName("UTF-8"));
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BufferedWriter writer = new BufferedWriter(os);
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writer.append(content);
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writer.close();
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} catch (Throwable t) {
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System.err.println("Failed to write content of " + file.getAbsolutePath());
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t.printStackTrace();
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}
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}
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/**
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* Recursively traverses a folder and its subfolders to calculate the total
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* size in bytes.
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*
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* @param directory
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* @return folder size in bytes
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*/
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public static long folderSize(File directory) {
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if (directory == null || !directory.exists()) {
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return -1;
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}
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if (directory.isFile()) {
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return directory.length();
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}
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long length = 0;
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for (File file : directory.listFiles()) {
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if (file.isFile()) {
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length += file.length();
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} else {
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length += folderSize(file);
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}
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}
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return length;
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}
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/**
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* Copies a file or folder (recursively) to a destination folder.
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*
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* @param destinationFolder
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* @param filesOrFolders
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* @return
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* @throws FileNotFoundException
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* @throws IOException
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*/
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public static void copy(File destinationFolder, File... filesOrFolders)
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throws FileNotFoundException, IOException {
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destinationFolder.mkdirs();
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for (File file : filesOrFolders) {
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if (file.isDirectory()) {
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copy(new File(destinationFolder, file.getName()), file.listFiles());
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} else {
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File dFile = new File(destinationFolder, file.getName());
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BufferedInputStream bufin = null;
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FileOutputStream fos = null;
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try {
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bufin = new BufferedInputStream(new FileInputStream(file));
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fos = new FileOutputStream(dFile);
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int len = 8196;
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byte[] buff = new byte[len];
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int n = 0;
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while ((n = bufin.read(buff, 0, len)) != -1) {
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fos.write(buff, 0, n);
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}
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} finally {
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try {
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bufin.close();
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} catch (Throwable t) {
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}
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try {
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fos.close();
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} catch (Throwable t) {
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}
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}
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dFile.setLastModified(file.lastModified());
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}
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}
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}
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}
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