/**
* Copyright 2011-2017 Asakusa Framework Team.
*
* 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.asakusafw.runtime.directio.util;
import java.io.IOException;
import java.io.OutputStream;
import com.asakusafw.runtime.directio.Counter;
/**
* {@link OutputStream} with counting bytes to be written.
* @since 0.2.5
*/
public class CountOutputStream extends OutputStream {
private final OutputStream stream;
private final Counter counter;
/**
* Creates a new instance.
* @param stream target stream to be measured
* @param counter target bytes counter
* @throws IllegalArgumentException if some parameters were {@code null}
*/
public CountOutputStream(OutputStream stream, Counter counter) {
if (stream == null) {
throw new IllegalArgumentException("stream must not be null"); //$NON-NLS-1$
}
if (counter == null) {
throw new IllegalArgumentException("counter must not be null"); //$NON-NLS-1$
}
this.stream = stream;
this.counter = counter;
}
/**
* Returns the count since have read bytes.
* @return the count
*/
public long getCount() {
return counter.get();
}
@Override
public void write(int b) throws IOException {
stream.write(b);
counter.add(1);
}
@Override
public void write(byte[] b) throws IOException {
stream.write(b);
counter.add(b.length);
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
stream.write(b, off, len);
counter.add(len);
}
@Override
public void flush() throws IOException {
stream.flush();
}
@Override
public void close() throws IOException {
stream.close();
}
}