private Object decodeGet(final String[] sa) {
                    this.assertCommand(sa[0], "get");
                    return new GetCommand(sa[1], sa[2], Integer.parseInt(sa[3]), Long.parseLong(sa[4]),
                        Integer.parseInt(sa[5]), Integer.parseInt(sa[6]));
                }
result code length opaque\r\n message

@param buff
@param sa
@return
metamorphosis-commons/src/main/java/com/taobao/metamorphosis/network/MetamorphosisWireFormatType.java