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

// Copyright 2019 Tyler Neely
//
// 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.
//

use std::path::Path;

use crate::open_raw::{OpenRaw, OpenRawInput};
use crate::{ColumnFamilyDescriptor, Error, Options};

pub trait Open: OpenRaw {
    /// Open a database with default options.
    fn open_default<P: AsRef<Path>>(path: P) -> Result<Self, Error> {
        let mut opts = Options::default();
        opts.create_if_missing(true);
        Self::open(&opts, path)
    }

    /// Open the database with the specified options.
    fn open<P: AsRef<Path>>(opts: &Options, path: P) -> Result<Self, Error> {
        Self::open_with_descriptor(opts, path, Self::Descriptor::default())
    }

    fn open_with_descriptor<P: AsRef<Path>>(
        opts: &Options,
        path: P,
        descriptor: Self::Descriptor,
    ) -> Result<Self, Error> {
        let input = OpenRawInput {
            options: opts,
            path: path.as_ref(),
            column_families: vec![],
            open_descriptor: descriptor,
        };

        Self::open_raw(input)
    }
}

pub trait OpenCF: OpenRaw {
    /// Open a database with the given database options and column family names.
    ///
    /// Column families opened using this function will be created with default `Options`.
    fn open_cf<P, I, N>(opts: &Options, path: P, cfs: I) -> Result<Self, Error>
    where
        P: AsRef<Path>,
        I: IntoIterator<Item = N>,
        N: AsRef<str>,
    {
        let cfs = cfs
            .into_iter()
            .map(|name| ColumnFamilyDescriptor::new(name.as_ref(), Options::default()));

        Self::open_cf_descriptors(opts, path, cfs)
    }

    /// Open a database with the given database options and column family descriptors.
    fn open_cf_descriptors<P, I>(opts: &Options, path: P, cfs: I) -> Result<Self, Error>
    where
        P: AsRef<Path>,
        I: IntoIterator<Item = ColumnFamilyDescriptor>,
    {
        Self::open_cf_descriptors_with_descriptor(opts, path, cfs, Self::Descriptor::default())
    }

    fn open_cf_descriptors_with_descriptor<P, I>(
        opts: &Options,
        path: P,
        cfs: I,
        descriptor: Self::Descriptor,
    ) -> Result<Self, Error>
    where
        P: AsRef<Path>,
        I: IntoIterator<Item = ColumnFamilyDescriptor>,
    {
        let input = OpenRawInput {
            options: opts,
            path: path.as_ref(),
            column_families: cfs.into_iter().collect(),
            open_descriptor: descriptor,
        };

        Self::open_raw(input)
    }
}