org.nakedobjects.metamodel.commons.lang.IoUtils Maven / Gradle / Ivy
package org.nakedobjects.metamodel.commons.lang;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public final class IoUtils {
private static final int DEFAULT_BUFFER_SIZE = 1024;
private IoUtils() {}
/**
* Copy bytes from an InputStream to an OutputStream.
*
* This method buffers the input internally, so there is no need to use a BufferedInputStream.
*
* @param input
* the InputStream to read from
* @param output
* the OutputStream to write to
* @return the number of bytes copied
* @throws IllegalArgumentException
* if the input or output is null
* @throws IOException
* if an I/O error occurs
* @since Commons IO 1.1
*/
public static int copy(final InputStream input, final OutputStream output) throws IOException {
if (input == null) {
throw new IllegalArgumentException("InputStream cannot be null");
}
if (output == null) {
throw new IllegalArgumentException("OutputStream cannot be null");
}
final byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
int count = 0;
int n = 0;
while (-1 != (n = input.read(buffer))) {
output.write(buffer, 0, n);
count += n;
}
return count;
}
public static void closeSafely(InputStream in) {
if (in != null) {
try {
in.close();
} catch (IOException e) {
// ignore
}
}
}
public static void closeSafely(BufferedReader reader) {
if (reader != null) {
try {
reader.close();
} catch (final IOException ignore) {}
}
}
}
// Copyright (c) Naked Objects Group Ltd.