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Added geometry and gemometry array data type support
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package pgtypes | ||
|
|
||
| import ( | ||
| "database/sql/driver" | ||
| "github.com/jackc/pgx/v5/pgtype" | ||
| "strings" | ||
| ) | ||
|
|
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| // GeometryArrayCodec is a wrapper codec for geometry[] which isn't handled gracefully in | ||
| // the pgx base source code (at least in PG < 14 without binary wire protocol | ||
| // support) due to the way the text protocol sends back the value of a geometry item. | ||
| type GeometryArrayCodec struct { | ||
| PgxArrayCodec *pgtype.ArrayCodec | ||
| } | ||
|
|
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| func (c *GeometryArrayCodec) FormatSupported( | ||
| format int16, | ||
| ) bool { | ||
|
|
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| if format == pgtype.TextFormatCode { | ||
| return true | ||
| } | ||
| return c.PgxArrayCodec.FormatSupported(format) | ||
| } | ||
|
|
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| func (c *GeometryArrayCodec) PreferredFormat() int16 { | ||
| return c.PgxArrayCodec.PreferredFormat() | ||
| } | ||
|
|
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| func (c *GeometryArrayCodec) PlanEncode( | ||
| m *pgtype.Map, oid uint32, format int16, value any, | ||
| ) pgtype.EncodePlan { | ||
|
|
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| return c.PgxArrayCodec.PlanEncode(m, oid, format, value) | ||
| } | ||
|
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| func (c *GeometryArrayCodec) PlanScan( | ||
| m *pgtype.Map, oid uint32, format int16, target any, | ||
| ) pgtype.ScanPlan { | ||
|
|
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| if format == pgtype.TextFormatCode { | ||
| return &scanPlanGeometryArrayTextCodec{ | ||
| typeMap: m, | ||
| oid: oid, | ||
| } | ||
| } | ||
|
|
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| return c.PgxArrayCodec.PlanScan(m, oid, format, target) | ||
| } | ||
|
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| func (c *GeometryArrayCodec) DecodeDatabaseSQLValue( | ||
| m *pgtype.Map, oid uint32, format int16, src []byte, | ||
| ) (driver.Value, error) { | ||
|
|
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| return c.PgxArrayCodec.DecodeDatabaseSQLValue(m, oid, format, src) | ||
| } | ||
|
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| func (c *GeometryArrayCodec) DecodeValue( | ||
| m *pgtype.Map, oid uint32, format int16, src []byte, | ||
| ) (any, error) { | ||
|
|
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| if src == nil { | ||
| return nil, nil | ||
| } | ||
|
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| if format == pgtype.TextFormatCode { | ||
| var slice []Geometry | ||
| err := m.PlanScan(oid, format, &slice).Scan(src, &slice) | ||
| return slice, err | ||
| } | ||
|
|
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| return c.PgxArrayCodec.DecodeValue(m, oid, format, src) | ||
| } | ||
|
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| type scanPlanGeometryArrayTextCodec struct { | ||
| geometryCodec GeometryCodec | ||
| typeMap *pgtype.Map | ||
| oid uint32 | ||
| } | ||
|
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| func (spbac *scanPlanGeometryArrayTextCodec) Scan( | ||
| src []byte, dst any, | ||
| ) error { | ||
|
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| array := dst.(*[]Geometry) | ||
|
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| scanPlan := spbac.geometryCodec.PlanScan(spbac.typeMap, spbac.oid, pgtype.TextFormatCode, &Geometry{}) | ||
| if scanPlan == nil { | ||
| scanPlan = spbac.typeMap.PlanScan(spbac.oid, pgtype.TextFormatCode, &Geometry{}) | ||
| } | ||
|
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| // Semicolon seems to be the separator here | ||
| elements := strings.Split(string(src[1:len(src)-1]), ":") | ||
| for _, element := range elements { | ||
| item := Geometry{} | ||
| if err := scanPlan.Scan([]byte(element), &item); err != nil { | ||
| return err | ||
| } | ||
| *array = append(*array, item) | ||
| } | ||
| return nil | ||
| } |
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