org.dellroad.lzma.client

Class LZMADecompressor

java.lang.Object

org.dellroad.lzma.client.LZMADecompressor

All Implemented Interfaces:

com.google.gwt.core.client.Scheduler.RepeatingCommand

Direct Known Subclasses:

LZMAByteArrayDecompressor

public class LZMADecompressor
extends Object
implements com.google.gwt.core.client.Scheduler.RepeatingCommand

LZMA decompressor.

Constructor Summary

Constructors

Constructor and Description
LZMADecompressor(InputStream input, OutputStream output) Constructor.

Method Summary

Modifier and Type	Method and Description
boolean	execute() Process the next chunk of data.
IOException	getException() Get the exception thrown during the previous execution round, if any.
double	getProgress() Determine how much of the output data has been generated so far.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LZMADecompressor

public LZMADecompressor(InputStream input,
                        OutputStream output)
                 throws IOException

Constructor.

Decompression will stop when one of the following is true:

• An "end of file" marker is read from the compressed data
• The decompressed output reaches the length encoded in the compressed data
• The end of input is reached

The input and output streams will not be closed when the operation completes.

Parameters:

input - compressed input

output - uncompressed output

Throws:

IOException - if input or output causes an exception

IOException - if the compressed data is truncated or corrupted

Method Detail

execute

public boolean execute()

Process the next chunk of data. If an IOException is thrown during processing, this returns false and getException() will return the caught exception.

Specified by:

execute in interface com.google.gwt.core.client.Scheduler.RepeatingCommand

Returns:

true if there is more work to do, otherwise false

Throws:

IllegalStateException - if this compression operation has already completed

getProgress

public double getProgress()

Determine how much of the output data has been generated so far. If a length of -1 was encoded in the compressed data, then this always returns zero.

Returns:

a value from 0.0 to 1.0

getException

public IOException getException()

Get the exception thrown during the previous execution round, if any. Note: this method must be checked after compression is complete to determine if there was an error.

Returns:

thrown exception, or null if none was ever thrown