func init
	// adds using namespace
	sys.add_use('System.IO.Compression')

	// initialize instance
	if(linked("GZipStream"))
		this.setfield('gz', d("GZipStream"))
	elseif(isdef("GZipStream"))
		error(this.name + ' - property GZipStream does not defined')
	else
		this.setfield('gz', sys.get_undef_manager("GZipStream"))
	end

	if(linked("onError"))
		this.setfield('ex', 'ex' + this.id)
	end
end

func doFlush()
	linked("onError") ? blk.println('try {').inc() : ''
		blk.println(this.gz, '.Flush();')
	if(linked("onError"))
		blk.dec().println('} catch (Exception ', this.ex, ') {').inc()
			event("onError", this.ex + '.Message')
		blk.dec().println('}')
	end
end

func doDispose()
	blk.println(this.gz, '.Dispose();')
end

func doRead(data)
	linked("onError") ? blk.println('try {').inc() : ''
		if(linked("onRead"))
			event("onRead", this.gz + '.Read(' + d("Array") + ', ' + d("Offset") + ', ' + d("Count") + ')')
		else
			blk.println(this.gz, '.Read(', d("Array"), ', ', d("Offset"), ', ', d("Count"), ');')
		end
	if(linked("onError"))
		blk.dec().println('} catch (Exception ', this.ex, ') {').inc()
			event("onError", this.ex + '.Message')
		blk.dec().println('}')
	end
end

func doWrite(data)
	linked("onError") ? blk.println('try {').inc() : ''
		blk.println(this.gz, '.Write(', d("Array"), ', ', d("Offset"), ', ', d("Count"), ');')
	if(linked("onError"))
		blk.dec().println('} catch (Exception ', this.ex, ') {').inc()
			event("onError", this.ex + '.Message')
		blk.dec().println('}')
	end
end