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/*
* Copyright 2011 gitblit.com.
*
* Licensed 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 com.gitblit.utils;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.nio.charset.Charset;
/**
* Common file utilities.
*
* @author James Moger
*
*/
public class FileUtils {
/**
* Returns the string content of the specified file.
*
* @param file
* @param lineEnding
* @return the string content of the file
*/
public static String readContent(File file, String lineEnding) {
StringBuilder sb = new StringBuilder();
try {
InputStreamReader is = new InputStreamReader(new FileInputStream(file),
Charset.forName("UTF-8"));
BufferedReader reader = new BufferedReader(is);
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line);
if (lineEnding != null) {
sb.append(lineEnding);
}
}
reader.close();
} catch (Throwable t) {
System.err.println("Failed to read content of " + file.getAbsolutePath());
t.printStackTrace();
}
return sb.toString();
}
/**
* Writes the string content to the file.
*
* @param file
* @param content
*/
public static void writeContent(File file, String content) {
try {
OutputStreamWriter os = new OutputStreamWriter(new FileOutputStream(file),
Charset.forName("UTF-8"));
BufferedWriter writer = new BufferedWriter(os);
writer.append(content);
writer.close();
} catch (Throwable t) {
System.err.println("Failed to write content of " + file.getAbsolutePath());
t.printStackTrace();
}
}
/**
* Recursively traverses a folder and its subfolders to calculate the total
* size in bytes.
*
* @param directory
* @return folder size in bytes
*/
public static long folderSize(File directory) {
if (directory == null || !directory.exists()) {
return -1;
}
if (directory.isFile()) {
return directory.length();
}
long length = 0;
for (File file : directory.listFiles()) {
if (file.isFile()) {
length += file.length();
} else {
length += folderSize(file);
}
}
return length;
}
}
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