open-consul/vendor/github.com/hashicorp/go-memdb/schema.go

86 lines
1.9 KiB
Go

package memdb
import "fmt"
// DBSchema contains the full database schema used for MemDB
type DBSchema struct {
Tables map[string]*TableSchema
}
// Validate is used to validate the database schema
func (s *DBSchema) Validate() error {
if s == nil {
return fmt.Errorf("missing schema")
}
if len(s.Tables) == 0 {
return fmt.Errorf("no tables defined")
}
for name, table := range s.Tables {
if name != table.Name {
return fmt.Errorf("table name mis-match for '%s'", name)
}
if err := table.Validate(); err != nil {
return err
}
}
return nil
}
// TableSchema contains the schema for a single table
type TableSchema struct {
Name string
Indexes map[string]*IndexSchema
}
// Validate is used to validate the table schema
func (s *TableSchema) Validate() error {
if s.Name == "" {
return fmt.Errorf("missing table name")
}
if len(s.Indexes) == 0 {
return fmt.Errorf("missing table indexes for '%s'", s.Name)
}
if _, ok := s.Indexes["id"]; !ok {
return fmt.Errorf("must have id index")
}
if !s.Indexes["id"].Unique {
return fmt.Errorf("id index must be unique")
}
if _, ok := s.Indexes["id"].Indexer.(SingleIndexer); !ok {
return fmt.Errorf("id index must be a SingleIndexer")
}
for name, index := range s.Indexes {
if name != index.Name {
return fmt.Errorf("index name mis-match for '%s'", name)
}
if err := index.Validate(); err != nil {
return err
}
}
return nil
}
// IndexSchema contains the schema for an index
type IndexSchema struct {
Name string
AllowMissing bool
Unique bool
Indexer Indexer
}
func (s *IndexSchema) Validate() error {
if s.Name == "" {
return fmt.Errorf("missing index name")
}
if s.Indexer == nil {
return fmt.Errorf("missing index function for '%s'", s.Name)
}
switch s.Indexer.(type) {
case SingleIndexer:
case MultiIndexer:
default:
return fmt.Errorf("indexer for '%s' must be a SingleIndexer or MultiIndexer", s.Name)
}
return nil
}