116 lines
3.0 KiB
Go
116 lines
3.0 KiB
Go
package database
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import (
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"errors"
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"strings"
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"github.com/omniscale/imposm3/element"
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"github.com/omniscale/imposm3/geom"
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"github.com/omniscale/imposm3/mapping"
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"github.com/omniscale/imposm3/mapping/config"
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)
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type Config struct {
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ConnectionParams string
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Srid int
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ImportSchema string
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ProductionSchema string
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BackupSchema string
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}
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type DB interface {
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Begin() error
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End() error
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Abort() error
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Init() error
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Close() error
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Inserter
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}
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type BulkBeginner interface {
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BeginBulk() error
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}
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type Inserter interface {
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// InsertXxx inserts element of that type into the database.
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// element.Geom is set to that type.
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InsertPoint(element.OSMElem, geom.Geometry, []mapping.Match) error
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InsertLineString(element.OSMElem, geom.Geometry, []mapping.Match) error
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InsertPolygon(element.OSMElem, geom.Geometry, []mapping.Match) error
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InsertRelationMember(element.Relation, element.Member, geom.Geometry, []mapping.Match) error
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}
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type Deployer interface {
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Deploy() error
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RevertDeploy() error
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RemoveBackup() error
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}
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type Generalizer interface {
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Generalize() error
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EnableGeneralizeUpdates()
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GeneralizeUpdates() error
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}
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type Finisher interface {
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Finish() error
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}
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type Deleter interface {
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Inserter
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Delete(int64, []mapping.Match) error
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}
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type Optimizer interface {
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Optimize() error
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}
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var databases map[string]func(Config, *config.Mapping) (DB, error)
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func init() {
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databases = make(map[string]func(Config, *config.Mapping) (DB, error))
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}
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func Register(name string, f func(Config, *config.Mapping) (DB, error)) {
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databases[name] = f
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}
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func Open(conf Config, m *config.Mapping) (DB, error) {
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parts := strings.SplitN(conf.ConnectionParams, ":", 2)
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connectionType := parts[0]
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newFunc, ok := databases[connectionType]
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if !ok {
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return nil, errors.New("unsupported database type: " + connectionType)
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}
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db, err := newFunc(conf, m)
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if err != nil {
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return nil, err
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}
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return db, nil
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}
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// nullDb is a dummy database that imports into /dev/null
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type nullDb struct{}
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func (n *nullDb) Init() error { return nil }
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func (n *nullDb) Begin() error { return nil }
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func (n *nullDb) End() error { return nil }
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func (n *nullDb) Close() error { return nil }
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func (n *nullDb) Abort() error { return nil }
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func (n *nullDb) InsertPoint(element.OSMElem, geom.Geometry, []mapping.Match) error { return nil }
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func (n *nullDb) InsertLineString(element.OSMElem, geom.Geometry, []mapping.Match) error { return nil }
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func (n *nullDb) InsertPolygon(element.OSMElem, geom.Geometry, []mapping.Match) error { return nil }
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func (n *nullDb) InsertRelationMember(element.Relation, element.Member, geom.Geometry, []mapping.Match) error {
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return nil
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}
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func newNullDb(conf Config, m *config.Mapping) (DB, error) {
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return &nullDb{}, nil
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}
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func init() {
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Register("null", newNullDb)
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}
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