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// Copyright (c) 2011, Chute Corporation. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
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// this software without specific prior written permission.
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package darko.imagedownloader;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
/**
* @author Darko.Grozdanovski A {@link FilterInputStream} that blocks until the
* requested number of bytes have been read/skipped, or the end of the
* stream is reached.
*
* This filter can be used as a work-around for Issue
* #6066.
**/
public class BlockingFilterInputStream extends FilterInputStream {
public BlockingFilterInputStream(InputStream input) {
super(input);
}
@Override
public int read(byte[] buffer, int offset, int count) throws IOException {
int total = 0;
while (total < count) {
int read = super.read(buffer, offset + total, count - total);
if (read == -1) {
return (total != 0) ? total : -1;
}
total += read;
}
return total;
}
@Override
public int read(byte[] buffer) throws IOException {
int total = 0;
while (total < buffer.length) {
int offset = total;
int count = buffer.length - total;
int read = super.read(buffer, offset, count);
if (read == -1) {
return (total != 0) ? total : -1;
}
total += read;
}
return total;
}
@Override
public long skip(long count) throws IOException {
long total = 0L;
while (total < count) {
long skipped = super.skip(count - total);
if (skipped == 0L) {
int b = super.read();
if (b < 0) {
break;
} else {
skipped += 1;
}
}
total += skipped;
}
return total;
}
}