/**
* 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.camel.maven.connector.util;
import java.io.BufferedReader;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.nio.channels.FileChannel;
import java.util.ArrayList;
import java.util.List;
/**
* Utility methods for files.
*/
public final class FileHelper {
private FileHelper() {
}
/**
* Loads the entire stream into memory as a String and returns it.
* <p/>
* <b>Notice:</b> This implementation appends a <tt>\n</tt> as line
* terminator at the of the text.
* <p/>
* Warning, don't use for crazy big streams :)
*/
public static String loadText(InputStream in) throws IOException {
StringBuilder builder = new StringBuilder();
InputStreamReader isr = new InputStreamReader(in);
try {
BufferedReader reader = new LineNumberReader(isr);
while (true) {
String line = reader.readLine();
if (line != null) {
builder.append(line);
builder.append("\n");
} else {
break;
}
}
return builder.toString();
} finally {
isr.close();
in.close();
}
}
/**
* Loads the file
*/
public static List<String> loadFile(File file) throws Exception {
List<String> lines = new ArrayList<>();
LineNumberReader reader = new LineNumberReader(new FileReader(file));
String line;
do {
line = reader.readLine();
if (line != null) {
lines.add(line);
}
} while (line != null);
reader.close();
return lines;
}
/**
* Loads the file
*/
public static List<String> loadFile(InputStream fis) throws Exception {
List<String> lines = new ArrayList<>();
LineNumberReader reader = new LineNumberReader(new InputStreamReader(fis));
String line;
do {
line = reader.readLine();
if (line != null) {
lines.add(line);
}
} while (line != null);
reader.close();
return lines;
}
public static void copyFile(File from, File to) throws IOException {
FileChannel in = null;
FileChannel out = null;
try {
in = new FileInputStream(from).getChannel();
out = new FileOutputStream(to).getChannel();
long size = in.size();
long position = 0;
while (position < size) {
position += in.transferTo(position, 4096, out);
}
} finally {
close(in);
close(out);
}
}
/**
* Closes the given resource if it is available, logging any closing exceptions to the given log.
*/
public static void close(Closeable closeable) {
if (closeable != null) {
try {
closeable.close();
} catch (IOException e) {
// ignore
}
}
}
}