cassandra_proto/query/
query_params.rs

1use crate::consistency::Consistency;
2use crate::types::{to_bigint, to_int, to_short, CBytes};
3use crate::frame::AsByte;
4use crate::frame::IntoBytes;
5use super::query_flags::QueryFlags;
6use super::query_values::QueryValues;
7
8/// Parameters of Query for query operation.
9#[derive(Debug, Default)]
10pub struct QueryParams {
11  /// Cassandra consistency level.
12  pub consistency: Consistency,
13  /// Array of query flags.
14  pub flags: Vec<QueryFlags>,
15  /// Were values provided with names
16  pub with_names: Option<bool>,
17  /// Array of values.
18  pub values: Option<QueryValues>,
19  /// Page size.
20  pub page_size: Option<i32>,
21  /// Array of bytes which represents paging state.
22  pub paging_state: Option<CBytes>,
23  /// Serial `Consistency`.
24  pub serial_consistency: Option<Consistency>,
25  /// Timestamp.
26  pub timestamp: Option<i64>,
27}
28
29impl QueryParams {
30  /// Sets values of Query request params.
31  pub fn set_values(&mut self, values: QueryValues) {
32    self.flags.push(QueryFlags::Value);
33    self.values = Some(values);
34  }
35
36  fn flags_as_byte(&self) -> u8 {
37    self.flags.iter().fold(0, |acc, flag| acc | flag.as_byte())
38  }
39
40  #[allow(dead_code)]
41  fn parse_query_flags(byte: u8) -> Vec<QueryFlags> {
42    let mut flags: Vec<QueryFlags> = vec![];
43
44    if QueryFlags::has_value(byte) {
45      flags.push(QueryFlags::Value);
46    }
47    if QueryFlags::has_skip_metadata(byte) {
48      flags.push(QueryFlags::SkipMetadata);
49    }
50    if QueryFlags::has_page_size(byte) {
51      flags.push(QueryFlags::PageSize);
52    }
53    if QueryFlags::has_with_paging_state(byte) {
54      flags.push(QueryFlags::WithPagingState);
55    }
56    if QueryFlags::has_with_serial_consistency(byte) {
57      flags.push(QueryFlags::WithSerialConsistency);
58    }
59    if QueryFlags::has_with_default_timestamp(byte) {
60      flags.push(QueryFlags::WithDefaultTimestamp);
61    }
62    if QueryFlags::has_with_names_for_values(byte) {
63      flags.push(QueryFlags::WithNamesForValues);
64    }
65
66    flags
67  }
68}
69
70impl IntoBytes for QueryParams {
71  fn into_cbytes(&self) -> Vec<u8> {
72    let mut v: Vec<u8> = vec![];
73
74    v.extend_from_slice(self.consistency.into_cbytes().as_slice());
75    v.push(self.flags_as_byte());
76    if QueryFlags::has_value(self.flags_as_byte()) {
77      if let Some(ref values) = self.values {
78        v.extend_from_slice(to_short(values.len() as i16).as_slice());
79        v.extend_from_slice(values.into_cbytes().as_slice());
80      }
81    }
82    if QueryFlags::has_page_size(self.flags_as_byte()) && self.page_size.is_some() {
83      // XXX clone
84      v.extend_from_slice(to_int(self.page_size
85                                    .clone()
86                                    // unwrap is safe as we've checked that
87                                    // self.page_size.is_some()
88                                    .unwrap())
89                                    .as_slice());
90    }
91    if QueryFlags::has_with_paging_state(self.flags_as_byte()) && self.paging_state.is_some() {
92      // XXX clone
93      v.extend_from_slice(self.paging_state
94                                    .clone()
95                                    // unwrap is safe as we've checked that
96                                    // self.paging_state.is_some()
97                                    .unwrap()
98                                    .into_cbytes()
99                                    .as_slice());
100    }
101    if QueryFlags::has_with_serial_consistency(self.flags_as_byte())
102       && self.serial_consistency.is_some() {
103      // XXX clone
104      v.extend_from_slice(self.serial_consistency
105                                    .clone()
106                                    // unwrap is safe as we've checked that
107                                    // self.serial_consistency.is_some()
108                                    .unwrap()
109                                    .into_cbytes()
110                                    .as_slice());
111    }
112    if QueryFlags::has_with_default_timestamp(self.flags_as_byte()) && self.timestamp.is_some() {
113      // unwrap is safe as we've checked that self.timestamp.is_some()
114      v.extend_from_slice(to_bigint(self.timestamp.unwrap()).as_slice());
115    }
116
117    v
118  }
119}
cassandra_proto/query/query_params.rs

cassandra_proto/query/
query_params.rs
