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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162

use super::utils::is_copy_type;
use crate::ast;
use proc_macro2::TokenStream;
use quote::quote;

pub(super) fn generate_load_save_functions(schema: &ast::DatabaseSchema) -> TokenStream {
    let load_multifile_relations = load_multifile_relations_function(schema);
    let load_counters = load_counters_function();
    let load_interning_tables = load_multifle_interning_function(schema);
    let store_multifile_relations = store_multifile_relations_function(schema);
    let store_counters = store_counters_function();
    let store_interning_tables = store_multifle_interning_function(schema);
    quote! {
        impl Tables {
            pub fn load_multifile(
                database_root: &Path
            ) -> Result<Tables, Error> {
                let relations = load_multifile_relations(&database_root.join("relations"))?;
                let counters = load_counters(&database_root.join("counters.bincode"))?;
                let interning_tables = load_interning_tables(&database_root.join("interning"))?;
                Ok(Tables {
                    relations,
                    counters,
                    interning_tables,
                })
            }
            pub fn load_single_file(
                tables_file: &Path
            ) -> Result<Tables, Error> {
                crate::storage::load(tables_file)
            }
            pub fn store_multifile(&self, database_root: &Path) -> Result<(), Error> {
                let relations_path = database_root.join("relations");
                std::fs::create_dir_all(&relations_path)?;
                store_multifile_relations(&self.relations, &relations_path);
                let counters_path = database_root.join("counters.bincode");
                store_counters(&self.counters, &counters_path);
                let interning_tables_path = &database_root.join("interning");
                std::fs::create_dir_all(&interning_tables_path)?;
                store_multifile_interning_tables(
                    &self.interning_tables,
                    &interning_tables_path
                );
                Ok(())
            }
        }
        #load_multifile_relations
        #load_counters
        #load_interning_tables
        #store_multifile_relations
        #store_counters
        #store_interning_tables
    }
}

fn load_multifile_relations_function(schema: &ast::DatabaseSchema) -> TokenStream {
    let mut load_fields = TokenStream::new();
    for relation in &schema.relations {
        let relation_hash = relation.get_hash();
        let name = &relation.name;
        let file_name = format!("{}", name);
        load_fields.extend(quote! {
            #name: unsafe { Relation::load(#relation_hash, path.join(#file_name)) }?,
        });
    }
    quote! {
        fn load_multifile_relations(path: &Path) -> Result<Relations, Error> {
            Ok(Relations {
                #load_fields
            })
        }
    }
}

fn store_multifile_relations_function(schema: &ast::DatabaseSchema) -> TokenStream {
    let mut store_fields = TokenStream::new();
    for relation in &schema.relations {
        let name = &relation.name;
        let relation_hash = relation.get_hash();
        let file_name = name.to_string();
        store_fields.extend(quote! {
            unsafe { relations.#name.save(#relation_hash, path.join(#file_name)) }
        });
    }
    quote! {
        fn store_multifile_relations(
            relations: &Relations,
            path: &Path
        ) {
            #store_fields
        }
    }
}

fn load_counters_function() -> TokenStream {
    quote! {
        fn load_counters(path: &Path) -> Result<Counters, Error> {
            crate::storage::load(&path)
        }
    }
}

fn store_counters_function() -> TokenStream {
    quote! {
        fn store_counters(counters: &Counters, path: &Path) {
            crate::storage::save(counters, &path);
        }
    }
}

fn load_multifle_interning_function(schema: &ast::DatabaseSchema) -> TokenStream {
    let mut load_fields = TokenStream::new();
    for table in &schema.interning_tables {
        let ast::InterningTable { name, value, .. } = table;
        if is_copy_type(value, schema) {
            let table_hash = table.get_hash();
            let file_name = name.to_string();
            load_fields.extend(quote! {
                #name: unsafe { InterningTable::load(#table_hash, path.join(#file_name))? },
            });
        } else {
            let file_name = format!("{}.bincode", name);
            load_fields.extend(quote! {
                #name: crate::storage::load(&path.join(#file_name))?,
            });
        }
    }
    quote! {
        fn load_interning_tables(path: &Path) -> Result<InterningTables, Error> {
            Ok(InterningTables {
                #load_fields
            })
        }
    }
}

fn store_multifle_interning_function(schema: &ast::DatabaseSchema) -> TokenStream {
    let mut store_fields = TokenStream::new();
    for table in &schema.interning_tables {
        let ast::InterningTable { name, value, .. } = table;
        if is_copy_type(value, schema) {
            let table_hash = table.get_hash();
            let file_name = name.to_string();
            store_fields.extend(quote! {
                unsafe { interning_tables.#name.save(#table_hash, path.join(#file_name)); }
            });
        } else {
            let file_name = format!("{}.bincode", name);
            store_fields.extend(quote! {
                crate::storage::save(&interning_tables.#name, &path.join(#file_name));
            });
        }
    }
    quote! {
        fn store_multifile_interning_tables(
            interning_tables: &InterningTables,
            path: &Path
        ) {
            #store_fields
        }
    }
}