Mega Code Archive
Counting OutputStream
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/*
* @(#)$Id: CountingOutputStream.java 3619 2008-03-26 07:23:03Z yui $
*
* Copyright 2006-2008 Makoto YUI
*
* 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.
*
* Contributors:
* Makoto YUI - initial implementation
*/
//package xbird.util.io;
import java.io.IOException;
import java.io.OutputStream;
/**
*
* <DIV lang="en"></DIV>
* <DIV lang="ja"></DIV>
*
* @author Makoto YUI (yuin405 AT gmail.com)
*/
public class CountingOutputStream extends OutputStream {
private final OutputStream proxy;
private long count = 0;
public CountingOutputStream(final OutputStream out) {
assert (out != null);
this.proxy = out;
}
public void reset() {
this.count = 0;
}
public long getCount() {
if(count >= 0 && count <= Long.MAX_VALUE) {
return count;
}
throw new IllegalStateException("out bytes exceeds Long.MAX_VALUE: " + count);
}
@Override
public void write(int b) throws IOException {
++count; // just 1 byte is wrote
proxy.write(b);
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
count += len;
proxy.write(b, off, len);
}
@Override
public void write(byte[] b) throws IOException {
count += b.length;
proxy.write(b);
}
@Override
public void close() throws IOException {
proxy.close();
}
@Override
public void flush() throws IOException {
proxy.flush();
}
}
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