329 lines
8.0 KiB
Go
329 lines
8.0 KiB
Go
package mapping
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import (
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"github.com/omniscale/imposm3/element"
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"github.com/omniscale/imposm3/geom"
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)
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func (m *Mapping) pointMatcher() (NodeMatcher, error) {
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mappings := make(TagTableMapping)
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m.mappings(PointTable, mappings)
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filters := make(tableElementFilters)
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m.addFilters(filters)
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m.addTypedFilters(PointTable, filters)
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tables, err := m.tables(PointTable)
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return &tagMatcher{
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mappings: mappings,
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filters: filters,
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tables: tables,
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matchAreas: false,
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}, err
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}
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func (m *Mapping) lineStringMatcher() (WayMatcher, error) {
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mappings := make(TagTableMapping)
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m.mappings(LineStringTable, mappings)
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filters := make(tableElementFilters)
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m.addFilters(filters)
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m.addTypedFilters(LineStringTable, filters)
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tables, err := m.tables(LineStringTable)
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return &tagMatcher{
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mappings: mappings,
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filters: filters,
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tables: tables,
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matchAreas: false,
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}, err
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}
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func (m *Mapping) polygonMatcher() (RelWayMatcher, error) {
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mappings := make(TagTableMapping)
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m.mappings(PolygonTable, mappings)
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filters := make(tableElementFilters)
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m.addFilters(filters)
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m.addTypedFilters(PolygonTable, filters)
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relFilters := make(tableElementFilters)
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m.addRelationFilters(PolygonTable, relFilters)
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tables, err := m.tables(PolygonTable)
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return &tagMatcher{
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mappings: mappings,
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filters: filters,
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tables: tables,
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relFilters: relFilters,
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matchAreas: true,
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}, err
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}
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func (m *Mapping) relationMatcher() (RelationMatcher, error) {
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mappings := make(TagTableMapping)
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m.mappings(RelationTable, mappings)
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filters := make(tableElementFilters)
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m.addFilters(filters)
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m.addTypedFilters(PolygonTable, filters)
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m.addTypedFilters(RelationTable, filters)
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relFilters := make(tableElementFilters)
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m.addRelationFilters(RelationTable, relFilters)
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tables, err := m.tables(RelationTable)
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return &tagMatcher{
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mappings: mappings,
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filters: filters,
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tables: tables,
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relFilters: relFilters,
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matchAreas: true,
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}, err
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}
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func (m *Mapping) relationMemberMatcher() (RelationMatcher, error) {
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mappings := make(TagTableMapping)
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m.mappings(RelationMemberTable, mappings)
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filters := make(tableElementFilters)
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m.addFilters(filters)
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m.addTypedFilters(RelationMemberTable, filters)
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relFilters := make(tableElementFilters)
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m.addRelationFilters(RelationMemberTable, relFilters)
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tables, err := m.tables(RelationMemberTable)
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return &tagMatcher{
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mappings: mappings,
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filters: filters,
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tables: tables,
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relFilters: relFilters,
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matchAreas: true,
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}, err
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}
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type NodeMatcher interface {
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MatchNode(node *element.Node) []Match
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}
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type WayMatcher interface {
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MatchWay(way *element.Way) []Match
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}
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type RelationMatcher interface {
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MatchRelation(rel *element.Relation) []Match
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}
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type RelWayMatcher interface {
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WayMatcher
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RelationMatcher
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}
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type Match struct {
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Key string
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Value string
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Table DestTable
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builder *rowBuilder
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}
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func (m *Match) Row(elem *element.OSMElem, geom *geom.Geometry) []interface{} {
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return m.builder.MakeRow(elem, geom, *m)
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}
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func (m *Match) MemberRow(rel *element.Relation, member *element.Member, geom *geom.Geometry) []interface{} {
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return m.builder.MakeMemberRow(rel, member, geom, *m)
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}
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type tagMatcher struct {
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mappings TagTableMapping
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tables map[string]*rowBuilder
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filters tableElementFilters
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relFilters tableElementFilters
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matchAreas bool
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}
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func (tm *tagMatcher) MatchNode(node *element.Node) []Match {
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return tm.match(node.Tags, false, false)
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}
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func (tm *tagMatcher) MatchWay(way *element.Way) []Match {
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if tm.matchAreas { // match way as polygon
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if way.IsClosed() {
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if way.Tags["area"] == "no" {
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return nil
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}
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return tm.match(way.Tags, true, false)
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}
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} else { // match way as linestring
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if way.IsClosed() {
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if way.Tags["area"] == "yes" {
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return nil
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}
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return tm.match(way.Tags, true, false)
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}
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return tm.match(way.Tags, false, false)
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}
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return nil
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}
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func (tm *tagMatcher) MatchRelation(rel *element.Relation) []Match {
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return tm.match(rel.Tags, true, true)
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}
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type orderedMatch struct {
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Match
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order int
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}
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func (tm *tagMatcher) match(tags element.Tags, closed bool, relation bool) []Match {
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tables := make(map[DestTable]orderedMatch)
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addTables := func(k, v string, tbls []orderedDestTable) {
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for _, t := range tbls {
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this := orderedMatch{
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Match: Match{
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Key: k,
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Value: v,
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Table: t.DestTable,
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builder: tm.tables[t.Name],
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},
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order: t.order,
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}
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if other, ok := tables[t.DestTable]; ok {
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if other.order < this.order {
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this = other
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}
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}
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tables[t.DestTable] = this
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}
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}
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if values, ok := tm.mappings[Key("__any__")]; ok {
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addTables("__any__", "__any__", values["__any__"])
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}
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for k, v := range tags {
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values, ok := tm.mappings[Key(k)]
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if ok {
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if tbls, ok := values["__any__"]; ok {
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addTables(k, v, tbls)
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}
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if tbls, ok := values[Value(v)]; ok {
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addTables(k, v, tbls)
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}
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}
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}
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var matches []Match
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for t, match := range tables {
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filters, ok := tm.filters[t.Name]
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filteredOut := false
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if ok {
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for _, filter := range filters {
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if !filter(tags, Key(match.Key), closed) {
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filteredOut = true
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break
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}
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}
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}
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if relation && !filteredOut {
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filters, ok := tm.relFilters[t.Name]
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if ok {
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for _, filter := range filters {
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if !filter(tags, Key(match.Key), closed) {
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filteredOut = true
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break
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}
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}
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}
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}
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if !filteredOut {
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matches = append(matches, match.Match)
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}
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}
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return matches
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}
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type valueBuilder struct {
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key Key
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colType ColumnType
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}
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func (v *valueBuilder) Value(elem *element.OSMElem, geom *geom.Geometry, match Match) interface{} {
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if v.colType.Func != nil {
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return v.colType.Func(elem.Tags[string(v.key)], elem, geom, match)
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}
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return nil
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}
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func (v *valueBuilder) MemberValue(rel *element.Relation, member *element.Member, geom *geom.Geometry, match Match) interface{} {
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if v.colType.Func != nil {
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if v.colType.FromMember {
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if member.Elem == nil {
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return nil
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}
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return v.colType.Func(member.Elem.Tags[string(v.key)], member.Elem, geom, match)
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}
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return v.colType.Func(rel.Tags[string(v.key)], &rel.OSMElem, geom, match)
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}
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if v.colType.MemberFunc != nil {
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return v.colType.MemberFunc(rel, member, match)
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}
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return nil
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}
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type rowBuilder struct {
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columns []valueBuilder
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}
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func (r *rowBuilder) MakeRow(elem *element.OSMElem, geom *geom.Geometry, match Match) []interface{} {
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var row []interface{}
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for _, column := range r.columns {
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row = append(row, column.Value(elem, geom, match))
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}
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return row
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}
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func (r *rowBuilder) MakeMemberRow(rel *element.Relation, member *element.Member, geom *geom.Geometry, match Match) []interface{} {
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var row []interface{}
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for _, column := range r.columns {
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row = append(row, column.MemberValue(rel, member, geom, match))
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}
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return row
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}
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// SelectRelationPolygons returns a slice of all members that are already
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// imported as part of the relation.
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// Outer members are "imported" if they share the same destination table. Inner members
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// are "imported" when they also share the same key/value.
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func SelectRelationPolygons(polygonTagMatcher RelWayMatcher, rel *element.Relation) []element.Member {
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relMatches := polygonTagMatcher.MatchRelation(rel)
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result := []element.Member{}
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for _, m := range rel.Members {
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if m.Type != element.WAY {
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continue
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}
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memberMatches := polygonTagMatcher.MatchWay(m.Way)
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if m.Role == "outer" && dstEquals(relMatches, memberMatches) {
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result = append(result, m)
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} else if matchEquals(relMatches, memberMatches) {
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result = append(result, m)
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}
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}
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return result
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}
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// matchEquals returns true if both matches share key/value and table
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func matchEquals(matchesA, matchesB []Match) bool {
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for _, matchA := range matchesA {
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for _, matchB := range matchesB {
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if matchA.Key == matchB.Key &&
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matchA.Value == matchB.Value &&
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matchA.Table == matchB.Table {
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return true
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}
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}
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}
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return false
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}
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// dstEquals returns true if both matches share a single destination table
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func dstEquals(matchesA, matchesB []Match) bool {
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for _, matchA := range matchesA {
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for _, matchB := range matchesB {
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if matchA.Table == matchB.Table {
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return true
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}
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}
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}
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return false
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}
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