/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.nifi.stream.io;
import java.io.IOException;
import java.io.InputStream;
public class ByteCountingInputStream extends InputStream {
private final InputStream in;
private long bytesRead = 0L;
private long bytesSkipped = 0L;
private long bytesSinceMark = 0L;
public ByteCountingInputStream(final InputStream in) {
this.in = in;
}
public ByteCountingInputStream(final InputStream in, final long initialOffset) {
this.in = in;
this.bytesSkipped = initialOffset;
}
@Override
public int read() throws IOException {
final int fromSuper = in.read();
if (fromSuper >= 0) {
bytesRead++;
bytesSinceMark++;
}
return fromSuper;
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
final int fromSuper = in.read(b, off, len);
if (fromSuper >= 0) {
bytesRead += fromSuper;
bytesSinceMark += fromSuper;
}
return fromSuper;
}
@Override
public int read(byte[] b) throws IOException {
return read(b, 0, b.length);
}
@Override
public long skip(final long n) throws IOException {
final long skipped = in.skip(n);
if (skipped >= 0) {
bytesSkipped += skipped;
bytesSinceMark += skipped;
}
return skipped;
}
public long getBytesRead() {
return bytesRead;
}
public long getBytesSkipped() {
return bytesSkipped;
}
public long getBytesConsumed() {
return getBytesRead() + getBytesSkipped();
}
@Override
public void mark(final int readlimit) {
in.mark(readlimit);
bytesSinceMark = 0L;
}
@Override
public boolean markSupported() {
return in.markSupported();
}
@Override
public void reset() throws IOException {
in.reset();
bytesRead -= bytesSinceMark;
bytesSinceMark = 0L;
}
@Override
public void close() throws IOException {
in.close();
}
}