com.google.common.io.CountingOutputStream Maven / Gradle / Ivy
Go to download
This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Copyright (C) 2007 The Guava Authors
*
* 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.google.common.io;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
* An OutputStream that counts the number of bytes written.
*
* @author Chris Nokleberg
* @since 1.0
*/
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public final class CountingOutputStream extends FilterOutputStream {
private long count;
/**
* Wraps another output stream, counting the number of bytes written.
*
* @param out the output stream to be wrapped
*/
public CountingOutputStream(OutputStream out) {
super(checkNotNull(out));
}
/** Returns the number of bytes written. */
public long getCount() {
return count;
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
out.write(b, off, len);
count += len;
}
@Override
public void write(int b) throws IOException {
out.write(b);
count++;
}
// Overriding close() because FilterOutputStream's close() method pre-JDK8 has bad behavior:
// it silently ignores any exception thrown by flush(). Instead, just close the delegate stream.
// It should flush itself if necessary.
@Override
public void close() throws IOException {
out.close();
}
}