Creates a GZIPTileDecoder capable of decoding the encoded
data from the given InputStream using the specified
TileCodecParameterList containing the decoding
parameters to be used.
This method can return null if the TileDecoder is not
capable of producing output for the given set of parameters.
For example, if a TileDecoder is only capable of dealing
with a jpeg quality factor of 0.5, and the associated
TileCodecParameterList specifies a quality factor of 0.75,
null should be returned.
It is recommended that the data in the supplied
InputStream not be used as a factor in determining
whether this InputStream can be successfully decoded,
unless the supplied InputStream is known to be rewindable
(i.e. its markSupported() method returns true or it has
additional functionality that allows backward seeking). It is required
that the InputStream contain the same data on
returning from this method as before this method was called.
In other words, the InputStream should only be used as a
discriminator if it can be rewound to its starting position
before returning from this method. Note that wrapping the
incoming InputStream in a PushbackInputStream
and then rewinding the PushbackInputStream before returning
does not rewind the wrapped InputStream.
If the supplied TileCodecParameterList is null,
a default TileCodecParameterList from the
TileCodecDescriptor will be used to create the decoder.
Exceptions thrown by the TileDecoder will be
caught by this method and will not be propagated.
Parameters:
input - The InputStream containing the encoded datato decode.
Parameters:
param - The parameters to be be used in the decoding process.
throws:
IllegalArgumentException - if input is null. | 