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README
¶
go-whosonfirst-iterate-reader
Go package implementing go-whosonfirst-iterate/emitter functionality using whosonfirst/go-reader.Reader instances.
Documentation
Example
import (
"context"
"github.com/whosonfirst/go-whosonfirst-iterate/v2/iterator"
_ "github.com/whosonfirst/go-whosonfirst-iterate-reader"
"io"
"log"
)
func main() {
ctx := context.Background()
iter_cb := func(ctx context.Context, path string, fh io.ReadSeeker, args ...interface{}) error {
log.Println(path)
return nil
}
iter_uri := "reader://?reader=fs%3A%2F%2F%2Fusr%2Flocal%2Fwhosonfirst%2Fgo-whosonfirst-iterate-reader%2Ffixtures%2Fdata"
iter, _ := iterator.NewIterator(ctx, iter_uri, emitter_cb)
iter.IterateURIs(ctx, "102/527/513/102527513.geojson")
``
## Tools
### emit
$> go run -mod vendor cmd/emit/main.go
-emitter-uri 'reader://?reader=fs:///usr/local/data/sfomuseum-data-whosonfirst/data' 1 \
| jq '.["properties"]["wof:name"]'
"Null Island"
## See also
* https://github.com/whosonfirst/go-whosonfirst-iterate
* https://github.com/whosonfirst/go-reader
Documentation
¶
Overview ¶
Package reader implements the `go-whosonfirst-iterate/emitter` interfaces using `whosonfirst/go-reader.Reader` instances.
Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func NewReaderEmitter ¶
NewGitEmitter() returns a new `GitEmitter` instance configured by 'uri' in the form of:
reader://?{PARAMETERS}
Where {PATH} is an optional path on disk where a repository will be clone to (default is to clone repository in memory) and {PARAMETERS} may be: * `?include=` Zero or more `aaronland/go-json-query` query strings containing rules that must match for a document to be considered for further processing. * `?exclude=` Zero or more `aaronland/go-json-query` query strings containing rules that if matched will prevent a document from being considered for further processing. * `?include_mode=` A valid `aaronland/go-json-query` query mode string for testing inclusion rules. * `?exclude_mode=` A valid `aaronland/go-json-query` query mode string for testing exclusion rules. * `?reader=` A valid `whosonfirst/go-reader` URI used to create the underlying reader instance.
Types ¶
type ReaderEmitter ¶
GitEmitter implements the `Emitter` interface for crawling records with a `whosonfirst/go-reader.Reader` instance.
func (*ReaderEmitter) WalkURI ¶
func (idx *ReaderEmitter) WalkURI(ctx context.Context, index_cb emitter.EmitterCallbackFunc, path string) error
WalkURI() reads 'path' using the underlying reader (if not excluded by any filters specified when `idx` was created) and invokes 'index_cb'.
Source Files
Directories