Datasets:
ArXiv:
License:
File size: 2,533 Bytes
c574d3a |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 |
package httpcli.io;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public final class IOUtils {
public static final ByteArrayPool POOL = new ByteArrayPool(4096);
private IOUtils() {
}
public static void copy(File file, OutputStream out) throws IOException {
FileInputStream in = null;
byte[] buffer = null;
try {
in = new FileInputStream(file);
int bytesAvailable = in.available();
int maxBufferSize = 1024 * 1024;
int bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = POOL.getBuf(bufferSize);
int count = in.read(buffer, 0, bufferSize);
while (count > 0) {
out.write(buffer, 0, bufferSize);
bytesAvailable = in.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
count = in.read(buffer, 0, bufferSize);
}
} finally {
POOL.returnBuf(buffer);
closeQuietly(in);
}
}
public static void copy(InputStream source, OutputStream out) throws IOException {
if (source == null) throw new IOException("source == null");
byte[] buffer = POOL.getBuf(1024);
try {
int count;
while ((count = source.read(buffer)) != -1) {
out.write(buffer, 0, count);
}
} finally {
POOL.returnBuf(buffer);
}
}
public static PoolingByteArrayOutputStream arrayOutputStream() {
return new PoolingByteArrayOutputStream(POOL);
}
public static PoolingByteArrayOutputStream arrayOutputStream(int size) {
return new PoolingByteArrayOutputStream(POOL, size);
}
public static byte[] toByteArray(InputStream source) throws IOException {
return toByteArray(source, 1024);
}
public static byte[] toByteArray(InputStream source, int size) throws IOException {
if (source == null) throw new IOException("source == null");
PoolingByteArrayOutputStream bytes
= new PoolingByteArrayOutputStream(POOL, source.available());
byte[] buffer = POOL.getBuf(size);
try {
int count;
while ((count = source.read(buffer)) != -1) {
bytes.write(buffer, 0, count);
}
return bytes.toByteArray();
} finally {
POOL.returnBuf(buffer);
bytes.close();
}
}
public static void closeQuietly(Closeable closeable) {
if (closeable == null) return;
try {
closeable.close();
} catch (IOException ignore) {
// empty
}
}
} |