/**
* 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.tajo.util;
import com.google.protobuf.Message;
import org.apache.hadoop.fs.*;
import org.apache.hadoop.io.IOUtils;
import java.io.*;
import java.net.URL;
import java.nio.charset.Charset;
public class FileUtil {
public static void writeProto(File file, Message proto) throws IOException {
FileOutputStream stream = null;
try {
stream = new FileOutputStream(file);
stream.write(proto.toByteArray());
} finally {
IOUtils.closeStream(stream);
}
}
public static void writeProto(OutputStream out, Message proto) throws IOException {
out.write(proto.toByteArray());
}
public static void writeProto(FileSystem fs, Path path, Message proto) throws IOException {
FSDataOutputStream stream = fs.create(path);
try {
stream.write(proto.toByteArray());
} finally {
IOUtils.closeStream(stream);
}
}
public static Message loadProto(File file, Message proto) throws IOException {
FileInputStream in = null;
try {
in = new FileInputStream(file);
Message.Builder builder = proto.newBuilderForType().mergeFrom(in);
return builder.build();
} finally {
IOUtils.closeStream(in);
}
}
public static Message loadProto(InputStream in, Message proto) throws IOException {
Message.Builder builder = proto.newBuilderForType().mergeFrom(in);
return builder.build();
}
public static Message loadProto(FileSystem fs,
Path path, Message proto) throws IOException {
FSDataInputStream in = null;
try {
in = new FSDataInputStream(fs.open(path));
Message.Builder builder = proto.newBuilderForType().mergeFrom(in);
return builder.build();
} finally {
IOUtils.closeStream(in);
}
}
public static File getFile(String path) {
return new File(path);
}
public static URL getResourcePath(String resource) {
return ClassLoader.getSystemResource(resource);
}
public static String readTextFileFromResource(String resource) throws IOException {
StringBuilder fileData = new StringBuilder(1000);
InputStream inputStream = ClassLoader.getSystemResourceAsStream(resource);
byte[] buf = new byte[1024];
int numRead;
try {
while ((numRead = inputStream.read(buf)) != -1) {
String readData = new String(buf, 0, numRead, Charset.defaultCharset());
fileData.append(readData);
}
} finally {
IOUtils.cleanup(null, inputStream);
}
return fileData.toString();
}
public static String readTextFile(File file) throws IOException {
StringBuilder fileData = new StringBuilder(1000);
BufferedReader reader = new BufferedReader(new FileReader(file));
char[] buf = new char[1024];
int numRead;
try {
while ((numRead = reader.read(buf)) != -1) {
String readData = String.valueOf(buf, 0, numRead);
fileData.append(readData);
buf = new char[1024];
}
} finally {
IOUtils.cleanup(null, reader);
}
return fileData.toString();
}
public static String humanReadableByteCount(long bytes, boolean si) {
int unit = si ? 1000 : 1024;
if (bytes < unit) return bytes + " B";
int exp = (int) (Math.log(bytes) / Math.log(unit));
String pre = (si ? "kMGTPE" : "KMGTPE").charAt(exp - 1) + (si ? "" : "i");
return String.format("%.1f %sB", bytes / Math.pow(unit, exp), pre);
}
public static boolean isLocalPath(Path path) {
return path.toUri().getScheme().equals("file");
}
}