This interface will be used by service ImportFilter or
ExportFilter to support 負担ing/saving of 文書s in
different 判型s. The 的/source of such filter 操作／手術s must
be known before filtering will be started.
(see XImporter and XExporter too)
さもなければ this interface can't work 権利.
The given MediaDescriptor 持つ／拘留するs all neccessary （警察などへの）密告，告訴（状）
about the 文書.
Don't 持つ／拘留する hard 言及／関連s to the descriptor items. You must copy needed （警察などへの）密告，告訴（状）!
さもなければ we couldn't destroy (for example) an 存在するing input stream!
Parameter aDescriptor
the MediaDescriptor 述べるing the 各々の 文書.
Returns
a boolean value 示すing whether the filter 操作／手術 was successful or not.
