1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142

// Copyright 2016 Mozilla
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
// this file except in compliance with the License. You may obtain a copy of the
// License at http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.

extern crate failure;
#[macro_use] extern crate failure_derive;
extern crate indexmap;
extern crate itertools;
#[macro_use] extern crate lazy_static;
#[macro_use] extern crate log;

extern crate num;
extern crate petgraph;
extern crate rusqlite;
extern crate tabwriter;
extern crate time;

#[macro_use] extern crate edn;
#[macro_use] extern crate mentat_core;
extern crate mentat_sql;

use std::iter::repeat;

use itertools::Itertools;

pub use errors::{
    DbError,
    Result,
    SchemaConstraintViolation,
};
#[macro_use] pub mod errors;

mod add_retract_alter_set;
pub mod cache;
pub mod db;
mod bootstrap;
pub mod debug;
pub mod entids;
pub mod internal_types;    // pub because we need them for building entities programmatically.
mod metadata;
mod schema;
pub mod tx_observer;
mod watcher;
mod tx;
mod tx_checking;
pub mod types;
mod upsert_resolution;

// Export these for reference from tests. cfg(test) should work, but doesn't.
// #[cfg(test)]
pub use bootstrap::{
    TX0,
    USER0,
};

pub use schema::{
    AttributeBuilder,
    AttributeValidation,
};

pub use bootstrap::{
    CORE_SCHEMA_VERSION,
};

use edn::symbols;

pub use entids::{
    DB_SCHEMA_CORE,
};

pub use db::{
    TypedSQLValue,
    new_connection,
};

#[cfg(feature = "sqlcipher")]
pub use db::{
    new_connection_with_key,
    change_encryption_key,
};

pub use watcher::{
    TransactWatcher,
};

pub use tx::{
    transact,
    transact_terms,
};

pub use tx_observer::{
    InProgressObserverTransactWatcher,
    TxObservationService,
    TxObserver,
};

pub use types::{
    AttributeSet,
    DB,
    PartitionMap,
    TransactableValue,
    TxReport,
};

pub fn to_namespaced_keyword(s: &str) -> Result<symbols::Keyword> {
    let splits = [':', '/'];
    let mut i = s.split(&splits[..]);
    let nsk = match (i.next(), i.next(), i.next(), i.next()) {
        (Some(""), Some(namespace), Some(name), None) => Some(symbols::Keyword::namespaced(namespace, name)),
        _ => None,
    };

    nsk.ok_or(DbError::NotYetImplemented(format!("InvalidKeyword: {}", s)).into())
}

/// Prepare an SQL `VALUES` block, like (?, ?, ?), (?, ?, ?).
///
/// The number of values per tuple determines  `(?, ?, ?)`.  The number of tuples determines `(...), (...)`.
///
/// # Examples
///
/// ```rust
/// # use mentat_db::{repeat_values};
/// assert_eq!(repeat_values(1, 3), "(?), (?), (?)".to_string());
/// assert_eq!(repeat_values(3, 1), "(?, ?, ?)".to_string());
/// assert_eq!(repeat_values(2, 2), "(?, ?), (?, ?)".to_string());
/// ```
pub fn repeat_values(values_per_tuple: usize, tuples: usize) -> String {
    assert!(values_per_tuple >= 1);
    assert!(tuples >= 1);
    // Like "(?, ?, ?)".
    let inner = format!("({})", repeat("?").take(values_per_tuple).join(", "));
    // Like "(?, ?, ?), (?, ?, ?)".
    let values: String = repeat(inner).take(tuples).join(", ");
    values
}