forked from omniscale/imposm3
/
mapping.go
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/
mapping.go
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package mapping
import (
"io/ioutil"
"regexp"
osm "github.com/omniscale/go-osm"
"github.com/omniscale/imposm3/log"
"github.com/omniscale/imposm3/mapping/config"
"github.com/pkg/errors"
"gopkg.in/yaml.v2"
)
type orderedDestTable struct {
DestTable
order int
}
type TagTableMapping map[Key]map[Value][]orderedDestTable
func (tt TagTableMapping) addFromMapping(mapping config.KeyValues, table DestTable) {
for key, vals := range mapping {
for _, v := range vals {
vals, ok := tt[Key(key)]
tbl := orderedDestTable{DestTable: table, order: v.Order}
if ok {
vals[Value(v.Value)] = append(vals[Value(v.Value)], tbl)
} else {
tt[Key(key)] = make(map[Value][]orderedDestTable)
tt[Key(key)][Value(v.Value)] = append(tt[Key(key)][Value(v.Value)], tbl)
}
}
}
}
func (tt TagTableMapping) asTagMap() tagMap {
result := make(tagMap)
for k, vals := range tt {
result[k] = make(map[Value]struct{})
for v := range vals {
result[k][v] = struct{}{}
}
}
return result
}
type DestTable struct {
Name string
SubMapping string
}
type TableType string
func (tt *TableType) UnmarshalJSON(data []byte) error {
switch string(data) {
case "":
return errors.New("missing table type")
case `"point"`:
*tt = PointTable
case `"linestring"`:
*tt = LineStringTable
case `"polygon"`:
*tt = PolygonTable
case `"geometry"`:
*tt = GeometryTable
case `"relation"`:
*tt = RelationTable
case `"relation_member"`:
*tt = RelationMemberTable
}
return errors.New("unknown type " + string(data))
}
const (
PolygonTable TableType = "polygon"
LineStringTable TableType = "linestring"
PointTable TableType = "point"
GeometryTable TableType = "geometry"
RelationTable TableType = "relation"
RelationMemberTable TableType = "relation_member"
)
type Mapping struct {
Conf config.Mapping
PointMatcher NodeMatcher
LineStringMatcher WayMatcher
PolygonMatcher RelWayMatcher
RelationMatcher RelationMatcher
RelationMemberMatcher RelationMatcher
}
func FromFile(filename string) (*Mapping, error) {
b, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
return New(b)
}
func New(b []byte) (*Mapping, error) {
mapping := Mapping{}
err := yaml.Unmarshal(b, &mapping.Conf)
if err != nil {
return nil, err
}
err = mapping.prepare()
if err != nil {
return nil, err
}
err = mapping.createMatcher()
if err != nil {
return nil, err
}
return &mapping, nil
}
func (m *Mapping) prepare() error {
for name, t := range m.Conf.Tables {
t.Name = name
if t.OldFields != nil {
// todo deprecate 'fields'
t.Columns = t.OldFields
}
if t.Type == "" {
return errors.Errorf("missing type for table %s", name)
}
if TableType(t.Type) == GeometryTable {
if t.Mapping != nil || t.Mappings != nil {
return errors.Errorf("table with type:geometry requires type_mapping for table %s", name)
}
}
}
for name, t := range m.Conf.GeneralizedTables {
t.Name = name
}
return nil
}
func (m *Mapping) createMatcher() error {
var err error
m.PointMatcher, err = m.pointMatcher()
if err != nil {
return err
}
m.LineStringMatcher, err = m.lineStringMatcher()
if err != nil {
return err
}
m.PolygonMatcher, err = m.polygonMatcher()
if err != nil {
return err
}
m.RelationMatcher, err = m.relationMatcher()
if err != nil {
return err
}
m.RelationMemberMatcher, err = m.relationMemberMatcher()
if err != nil {
return err
}
return nil
}
func (m *Mapping) mappings(tableType TableType, mappings TagTableMapping) {
for name, t := range m.Conf.Tables {
if TableType(t.Type) != GeometryTable && TableType(t.Type) != tableType {
continue
}
mappings.addFromMapping(t.Mapping, DestTable{Name: name})
for subMappingName, subMapping := range t.Mappings {
mappings.addFromMapping(subMapping.Mapping, DestTable{Name: name, SubMapping: subMappingName})
}
switch tableType {
case PointTable:
mappings.addFromMapping(t.TypeMappings.Points, DestTable{Name: name})
case LineStringTable:
mappings.addFromMapping(t.TypeMappings.LineStrings, DestTable{Name: name})
case PolygonTable:
mappings.addFromMapping(t.TypeMappings.Polygons, DestTable{Name: name})
}
}
}
func (m *Mapping) tables(tableType TableType) (map[string]*rowBuilder, error) {
var err error
result := make(map[string]*rowBuilder)
for name, t := range m.Conf.Tables {
if TableType(t.Type) == tableType || TableType(t.Type) == GeometryTable {
result[name], err = makeRowBuilder(t)
if err != nil {
return nil, errors.Wrapf(err, "creating row builder for %s", name)
}
}
}
return result, nil
}
func makeRowBuilder(tbl *config.Table) (*rowBuilder, error) {
result := rowBuilder{}
for _, mappingColumn := range tbl.Columns {
column := valueBuilder{}
column.key = Key(mappingColumn.Key)
columnType, err := MakeColumnType(mappingColumn)
if err != nil {
return nil, errors.Wrapf(err, "creating column %s", mappingColumn.Name)
}
column.colType = *columnType
result.columns = append(result.columns, column)
}
return &result, nil
}
func MakeColumnType(c *config.Column) (*ColumnType, error) {
columnType, ok := AvailableColumnTypes[c.Type]
if !ok {
return nil, errors.Errorf("unhandled type %s", c.Type)
}
if columnType.MakeFunc != nil {
makeValue, err := columnType.MakeFunc(c.Name, columnType, *c)
if err != nil {
return nil, err
}
columnType = ColumnType{columnType.Name, columnType.GoType, makeValue, nil, nil, columnType.FromMember}
}
columnType.FromMember = c.FromMember
return &columnType, nil
}
func (m *Mapping) extraTags(tableType TableType, tags map[Key]bool) {
for _, t := range m.Conf.Tables {
if TableType(t.Type) != tableType && TableType(t.Type) != GeometryTable {
continue
}
for _, col := range t.Columns {
if col.Key != "" {
tags[Key(col.Key)] = true
}
for _, k := range col.Keys {
tags[Key(k)] = true
}
}
if t.Filters != nil && t.Filters.ExcludeTags != nil {
for _, keyVal := range *t.Filters.ExcludeTags {
tags[Key(keyVal[0])] = true
}
}
if tableType == PolygonTable || tableType == RelationTable || tableType == RelationMemberTable {
if t.RelationTypes != nil {
tags["type"] = true
}
}
}
for _, k := range m.Conf.Tags.Include {
tags[Key(k)] = true
}
// always include area tag for closed-way handling
tags["area"] = true
}
type elementFilter func(tags osm.Tags, key Key, closed bool) bool
type tableElementFilters map[string][]elementFilter
func (m *Mapping) addTypedFilters(tableType TableType, filters tableElementFilters) {
var areaTags map[Key]struct{}
var linearTags map[Key]struct{}
if m.Conf.Areas.AreaTags != nil {
areaTags = make(map[Key]struct{})
for _, tag := range m.Conf.Areas.AreaTags {
areaTags[Key(tag)] = struct{}{}
}
}
if m.Conf.Areas.LinearTags != nil {
linearTags = make(map[Key]struct{})
for _, tag := range m.Conf.Areas.LinearTags {
linearTags[Key(tag)] = struct{}{}
}
}
for name, t := range m.Conf.Tables {
if TableType(t.Type) != GeometryTable && TableType(t.Type) != tableType {
continue
}
if TableType(t.Type) == LineStringTable && areaTags != nil {
f := func(tags osm.Tags, key Key, closed bool) bool {
if closed {
if tags["area"] == "yes" {
return false
}
if tags["area"] != "no" {
if _, ok := areaTags[key]; ok {
return false
}
}
}
return true
}
filters[name] = append(filters[name], f)
}
if TableType(t.Type) == PolygonTable && linearTags != nil {
f := func(tags osm.Tags, key Key, closed bool) bool {
if closed && tags["area"] == "no" {
return false
}
if tags["area"] != "yes" {
if _, ok := linearTags[key]; ok {
return false
}
}
return true
}
filters[name] = append(filters[name], f)
}
}
}
func (m *Mapping) addRelationFilters(tableType TableType, filters tableElementFilters) {
for name, t := range m.Conf.Tables {
if t.RelationTypes != nil {
relTypes := t.RelationTypes // copy loop var for closure
f := func(tags osm.Tags, key Key, closed bool) bool {
if v, ok := tags["type"]; ok {
for _, rtype := range relTypes {
if v == rtype {
return true
}
}
}
return false
}
filters[name] = append(filters[name], f)
} else {
if TableType(t.Type) == PolygonTable {
// standard multipolygon handling (boundary and land_area are for backwards compatibility)
f := func(tags osm.Tags, key Key, closed bool) bool {
if v, ok := tags["type"]; ok {
if v == "multipolygon" || v == "boundary" || v == "land_area" {
return true
}
}
return false
}
filters[name] = append(filters[name], f)
}
}
}
}
func (m *Mapping) addFilters(filters tableElementFilters) {
for name, t := range m.Conf.Tables {
if t.Filters == nil {
continue
}
if t.Filters.ExcludeTags != nil {
log.Println("[warn]: exclude_tags filter is deprecated and will be removed. See require and reject filter.")
for _, filterKeyVal := range *t.Filters.ExcludeTags {
// Convert `exclude_tags`` filter to `reject` filter !
keyname := filterKeyVal[0]
vararr := []config.OrderedValue{
{
Value: config.Value(filterKeyVal[1]),
Order: 1,
},
}
filters[name] = append(filters[name], makeFiltersFunction(name, false, true, keyname, vararr))
}
}
if t.Filters.Require != nil {
for keyname, vararr := range t.Filters.Require {
filters[name] = append(filters[name], makeFiltersFunction(name, true, false, string(keyname), vararr))
}
}
if t.Filters.Reject != nil {
for keyname, vararr := range t.Filters.Reject {
filters[name] = append(filters[name], makeFiltersFunction(name, false, true, string(keyname), vararr))
}
}
if t.Filters.RequireRegexp != nil {
for keyname, regexp := range t.Filters.RequireRegexp {
filters[name] = append(filters[name], makeRegexpFiltersFunction(name, true, false, string(keyname), regexp))
}
}
if t.Filters.RejectRegexp != nil {
for keyname, regexp := range t.Filters.RejectRegexp {
filters[name] = append(filters[name], makeRegexpFiltersFunction(name, false, true, string(keyname), regexp))
}
}
}
}
func findValueInOrderedValue(v config.Value, list []config.OrderedValue) bool {
for _, item := range list {
if item.Value == v {
return true
}
}
return false
}
func makeRegexpFiltersFunction(tablename string, virtualTrue bool, virtualFalse bool, vKeyname string, vRegexp string) func(tags osm.Tags, key Key, closed bool) bool {
// Compile regular expression, if not valid regexp --> panic !
r := regexp.MustCompile(vRegexp)
return func(tags osm.Tags, key Key, closed bool) bool {
if v, ok := tags[vKeyname]; ok {
if r.MatchString(v) {
return virtualTrue
}
}
return virtualFalse
}
}
func makeFiltersFunction(tablename string, virtualTrue bool, virtualFalse bool, vKeyname string, vVararr []config.OrderedValue) func(tags osm.Tags, key Key, closed bool) bool {
if findValueInOrderedValue("__nil__", vVararr) { // check __nil__
log.Println("[warn] Filter value '__nil__' is not supported ! (tablename:" + tablename + ")")
}
if findValueInOrderedValue("__any__", vVararr) { // check __any__
if len(vVararr) > 1 {
log.Println("[warn] Multiple filter value with '__any__' keywords is not valid! (tablename:" + tablename + ")")
}
return func(tags osm.Tags, key Key, closed bool) bool {
if _, ok := tags[vKeyname]; ok {
return virtualTrue
}
return virtualFalse
}
} else if len(vVararr) == 1 { // IF 1 parameter THEN we can generate optimal code
return func(tags osm.Tags, key Key, closed bool) bool {
if v, ok := tags[vKeyname]; ok {
if config.Value(v) == vVararr[0].Value {
return virtualTrue
}
}
return virtualFalse
}
} else { // > 1 parameter - less optimal code
return func(tags osm.Tags, key Key, closed bool) bool {
if v, ok := tags[vKeyname]; ok {
if findValueInOrderedValue(config.Value(v), vVararr) {
return virtualTrue
}
}
return virtualFalse
}
}
}