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java.lang.Objectjava.io.OutputStream
java.io.FilterOutputStream
java.util.zip.DeflaterOutputStream
public class DeflaterOutputStream
This is a special FilterOutputStream deflating the bytes that are written through it. It uses the Deflater for deflating. A special thing to be noted is that flush() doesn't flush everything in Sun's JDK, but it does so in jazzlib. This is because Sun's Deflater doesn't have a way to flush() everything, without finishing the stream.
Field Summary | |
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protected byte[] |
buf
This buffer is used temporarily to retrieve the bytes from the deflater and write them to the underlying output stream. |
protected Deflater |
def
The deflater which is used to deflate the stream. |
Fields inherited from class java.io.FilterOutputStream |
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out |
Constructor Summary | |
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DeflaterOutputStream(OutputStream out)
Creates a new DeflaterOutputStream with a default Deflater and default buffer size. |
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DeflaterOutputStream(OutputStream out,
Deflater defl)
Creates a new DeflaterOutputStream with the given Deflater and default buffer size. |
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DeflaterOutputStream(OutputStream out,
Deflater defl,
int bufsize)
Creates a new DeflaterOutputStream with the given Deflater and buffer size. |
Method Summary | |
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void |
close()
Calls finish() and closes the stream. |
protected void |
deflate()
Deflates everything in the def's input buffers. |
void |
finish()
Finishes the stream by calling finish() on the deflater. |
void |
flush()
Flushes the stream by calling flush() on the deflater and then on the underlying stream. |
void |
write(byte[] buf,
int off,
int len)
Writes a len bytes from an array to the compressed stream. |
void |
write(int bval)
Writes a single byte to the compressed output stream. |
Methods inherited from class java.io.FilterOutputStream |
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write |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected byte[] buf
protected Deflater def
Constructor Detail |
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public DeflaterOutputStream(OutputStream out)
out
- the output stream where deflated output should be written.public DeflaterOutputStream(OutputStream out, Deflater defl)
out
- the output stream where deflated output should be written.defl
- the underlying deflater.public DeflaterOutputStream(OutputStream out, Deflater defl, int bufsize)
out
- the output stream where deflated output should be written.defl
- the underlying deflater.bufsize
- the buffer size.
IllegalArgumentException
- if bufsize isn't positive.Method Detail |
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protected void deflate() throws IOException
def.deflate()
until all bytes from the input buffers
are processed.
IOException
public void flush() throws IOException
flush
in interface Flushable
flush
in class FilterOutputStream
IOException
- If an error occurspublic void finish() throws IOException
IOException
public void close() throws IOException
close
in interface Closeable
close
in class FilterOutputStream
IOException
- If an error occurspublic void write(int bval) throws IOException
write
in class FilterOutputStream
bval
- the byte value.
IOException
- If an error occurspublic void write(byte[] buf, int off, int len) throws IOException
write
in class FilterOutputStream
buf
- the byte array.off
- the offset into the byte array where to start.len
- the number of bytes to write.
IOException
- If an error occurs
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