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Fix parsing Z, M, and ZM WKT strings #115

Merged
merged 11 commits into from
Jul 23, 2024
Merged

Fix parsing Z, M, and ZM WKT strings #115

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e1d838d
Support parsing Z, M, and ZM
kylebarron Jul 17, 2024
7c9f9a1
Add tests
kylebarron Jul 17, 2024
57365e6
Add multipoint tests
kylebarron Jul 17, 2024
228d782
add to changes
kylebarron Jul 17, 2024
c37f220
fix test
kylebarron Jul 17, 2024
71b7915
Merge remote-tracking branch 'origin/main' into kyle/support-zm
michaelkirk Jul 17, 2024
2aa5b18
cargo fmt
michaelkirk Jul 17, 2024
b1c5ad3
change to pub(crate)
kylebarron Jul 18, 2024
d6ff1e4
use eq_ignore_ascii_case
kylebarron Jul 18, 2024
bdaa0bc
condense import
kylebarron Jul 18, 2024
225f1a1
Add no-whitespace support
kylebarron Jul 18, 2024
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1 change: 1 addition & 0 deletions CHANGES.md
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@

## Unreleased

* Support parsing Z, M, and ZM WKT strings.
* Changed license field to [SPDX 2.1 license expression](https://spdx.dev/spdx-specification-21-web-version/#h.jxpfx0ykyb60)
* Bump min version of geo-types, and update geo_types::Coordinate to non-deprecated geo_types::Coord
* BREAKING: WktNum must implement PartialEq
Expand Down
279 changes: 229 additions & 50 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -83,13 +83,10 @@ use std::str::FromStr;
use num_traits::{Float, Num, NumCast};

use crate::tokenizer::{PeekableTokens, Token, Tokens};
use crate::types::GeometryCollection;
use crate::types::LineString;
use crate::types::MultiLineString;
use crate::types::MultiPoint;
use crate::types::MultiPolygon;
use crate::types::Point;
use crate::types::Polygon;
use crate::types::{
Dimension, GeometryCollection, LineString, MultiLineString, MultiPoint, MultiPolygon, Point,
Polygon,
};

mod to_wkt;
mod tokenizer;
Expand Down Expand Up @@ -162,62 +159,186 @@ where
word: &str,
tokens: &mut PeekableTokens<T>,
) -> Result<Self, &'static str> {
// Normally Z/M/ZM is separated by a space from the primary WKT word. E.g. `POINT Z`
// instead of `POINTZ`. However we wish to support both types (in reading). When written
// without a space, `POINTZ` is considered a single word, which means we need to include
// matches here.
match word {
w if w.eq_ignore_ascii_case("POINT") => {
let x = <Point<T> as FromTokens<T>>::from_tokens_with_parens(tokens);
let x = <Point<T> as FromTokens<T>>::from_tokens_with_header(tokens, None);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("POINTZ") => {
let x = <Point<T> as FromTokens<T>>::from_tokens_with_parens(tokens)?;
if let Some(coord) = &x.0 {
if coord.z.is_none() {
return Err("POINTZ must have a z-coordinate.");
}
}
Ok(x.into())
let x = <Point<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZ),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("POINTM") => {
let mut x = <Point<T> as FromTokens<T>>::from_tokens_with_parens(tokens)?;
if let Some(coord) = &mut x.0 {
if coord.z.is_none() {
return Err("POINTM must have an m-coordinate.");
} else {
coord.m = coord.z.take();
}
}
Ok(x.into())
let x = <Point<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYM),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("POINTZM") => {
let x = <Point<T> as FromTokens<T>>::from_tokens_with_parens(tokens)?;
if let Some(coord) = &x.0 {
if coord.z.is_none() || coord.m.is_none() {
return Err("POINTZM must have both a z- and m-coordinate");
}
}
Ok(x.into())
let x = <Point<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZM),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("LINESTRING") || w.eq_ignore_ascii_case("LINEARRING") => {
let x = <LineString<T> as FromTokens<T>>::from_tokens_with_parens(tokens);
let x = <LineString<T> as FromTokens<T>>::from_tokens_with_header(tokens, None);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("LINESTRINGZ") => {
let x = <LineString<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZ),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("LINESTRINGM") => {
let x = <LineString<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYM),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("LINESTRINGZM") => {
let x = <LineString<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZM),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("POLYGON") => {
let x = <Polygon<T> as FromTokens<T>>::from_tokens_with_parens(tokens);
let x = <Polygon<T> as FromTokens<T>>::from_tokens_with_header(tokens, None);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("POLYGONZ") => {
let x = <Polygon<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZ),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("POLYGONM") => {
let x = <Polygon<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYM),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("POLYGONZM") => {
let x = <Polygon<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZM),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("MULTIPOINT") => {
let x = <MultiPoint<T> as FromTokens<T>>::from_tokens_with_parens(tokens);
let x = <MultiPoint<T> as FromTokens<T>>::from_tokens_with_header(tokens, None);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("MULTIPOINTZ") => {
let x = <MultiPoint<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZ),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("MULTIPOINTM") => {
let x = <MultiPoint<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYM),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("MULTIPOINTZM") => {
let x = <MultiPoint<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZM),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("MULTILINESTRING") => {
let x = <MultiLineString<T> as FromTokens<T>>::from_tokens_with_parens(tokens);
let x =
<MultiLineString<T> as FromTokens<T>>::from_tokens_with_header(tokens, None);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("MULTILINESTRINGZ") => {
let x = <MultiLineString<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZ),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("MULTILINESTRINGM") => {
let x = <MultiLineString<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYM),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("MULTILINESTRINGZM") => {
let x = <MultiLineString<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZM),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("MULTIPOLYGON") => {
let x = <MultiPolygon<T> as FromTokens<T>>::from_tokens_with_parens(tokens);
let x = <MultiPolygon<T> as FromTokens<T>>::from_tokens_with_header(tokens, None);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("MULTIPOLYGONZ") => {
let x = <MultiPolygon<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZ),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("MULTIPOLYGONM") => {
let x = <MultiPolygon<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYM),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("MULTIPOLYGONZM") => {
let x = <MultiPolygon<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZM),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("GEOMETRYCOLLECTION") => {
let x = <GeometryCollection<T> as FromTokens<T>>::from_tokens_with_parens(tokens);
let x =
<GeometryCollection<T> as FromTokens<T>>::from_tokens_with_header(tokens, None);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("GEOMETRYCOLLECTIONZ") => {
let x = <GeometryCollection<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZ),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("GEOMETRYCOLLECTIONM") => {
let x = <GeometryCollection<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYM),
);
x.map(|y| y.into())
}
w if w.eq_ignore_ascii_case("GEOMETRYCOLLECTIONZM") => {
let x = <GeometryCollection<T> as FromTokens<T>>::from_tokens_with_header(
tokens,
Some(Dimension::XYZM),
);
x.map(|y| y.into())
}
_ => Err("Invalid type encountered"),
Expand Down Expand Up @@ -272,21 +393,72 @@ where
}
}

fn infer_geom_dimension<T: WktNum + FromStr + Default>(
tokens: &mut PeekableTokens<T>,
) -> Result<Dimension, &'static str> {
if let Some(Ok(c)) = tokens.peek() {
match c {
// If we match a word check if it's Z/M/ZM and consume the token from the stream
Token::Word(w) => match w.as_str() {
w if w.eq_ignore_ascii_case("Z") => {
tokens.next().unwrap().unwrap();
Ok(Dimension::XYZ)
}
w if w.eq_ignore_ascii_case("M") => {
tokens.next().unwrap().unwrap();

Ok(Dimension::XYM)
}
w if w.eq_ignore_ascii_case("ZM") => {
tokens.next().unwrap().unwrap();
Ok(Dimension::XYZM)
}
w if w.eq_ignore_ascii_case("EMPTY") => Ok(Dimension::XY),
_ => Err("Unexpected word before open paren"),
},
// Not a word, e.g. an open paren
_ => Ok(Dimension::XY),
}
} else {
Err("End of stream")
}
}

trait FromTokens<T>: Sized + Default
where
T: WktNum + FromStr + Default,
{
fn from_tokens(tokens: &mut PeekableTokens<T>) -> Result<Self, &'static str>;
fn from_tokens(tokens: &mut PeekableTokens<T>, dim: Dimension) -> Result<Self, &'static str>;

/// The preferred top-level FromTokens API, which additionally checks for the presence of Z, M,
/// and ZM in the token stream.
fn from_tokens_with_header(
tokens: &mut PeekableTokens<T>,
dim: Option<Dimension>,
) -> Result<Self, &'static str> {
let dim = if let Some(dim) = dim {
dim
} else {
infer_geom_dimension(tokens)?
};
FromTokens::from_tokens_with_parens(tokens, dim)
}

fn from_tokens_with_parens(tokens: &mut PeekableTokens<T>) -> Result<Self, &'static str> {
fn from_tokens_with_parens(
tokens: &mut PeekableTokens<T>,
dim: Dimension,
) -> Result<Self, &'static str> {
match tokens.next().transpose()? {
Some(Token::ParenOpen) => (),
Some(Token::Word(ref s)) if s.eq_ignore_ascii_case("EMPTY") => {
return Ok(Default::default())
// TODO: expand this to support Z EMPTY
// Maybe create a DefaultXY, DefaultXYZ trait etc for each geometry type, and then
// here match on the dim to decide which default trait to use.
return Ok(Default::default());
}
_ => return Err("Missing open parenthesis for type"),
};
let result = FromTokens::from_tokens(tokens);
let result = FromTokens::from_tokens(tokens, dim);
match tokens.next().transpose()? {
Some(Token::ParenClose) => (),
_ => return Err("Missing closing parenthesis for type"),
Expand All @@ -296,26 +468,31 @@ where

fn from_tokens_with_optional_parens(
tokens: &mut PeekableTokens<T>,
dim: Dimension,
) -> Result<Self, &'static str> {
match tokens.peek() {
Some(Ok(Token::ParenOpen)) => Self::from_tokens_with_parens(tokens),
_ => Self::from_tokens(tokens),
Some(Ok(Token::ParenOpen)) => Self::from_tokens_with_parens(tokens, dim),
_ => Self::from_tokens(tokens, dim),
}
}

fn comma_many<F>(f: F, tokens: &mut PeekableTokens<T>) -> Result<Vec<Self>, &'static str>
fn comma_many<F>(
f: F,
tokens: &mut PeekableTokens<T>,
dim: Dimension,
) -> Result<Vec<Self>, &'static str>
where
F: Fn(&mut PeekableTokens<T>) -> Result<Self, &'static str>,
F: Fn(&mut PeekableTokens<T>, Dimension) -> Result<Self, &'static str>,
{
let mut items = Vec::new();

let item = f(tokens)?;
let item = f(tokens, dim)?;
items.push(item);

while let Some(&Ok(Token::Comma)) = tokens.peek() {
tokens.next(); // throw away comma

let item = f(tokens)?;
let item = f(tokens, dim)?;
items.push(item);
}

Expand Down Expand Up @@ -383,7 +560,7 @@ mod tests {
}

// point(x, y, z)
let wkt = <Wkt<f64>>::from_str("POINTZ (10 20.1 5)").ok().unwrap();
let wkt = <Wkt<f64>>::from_str("POINT Z (10 20.1 5)").ok().unwrap();
match wkt {
Wkt::Point(Point(Some(coord))) => {
assert_eq!(coord.x, 10.0);
Expand All @@ -395,7 +572,7 @@ mod tests {
}

// point(x, y, m)
let wkt = <Wkt<f64>>::from_str("POINTM (10 20.1 80)").ok().unwrap();
let wkt = <Wkt<f64>>::from_str("POINT M (10 20.1 80)").ok().unwrap();
match wkt {
Wkt::Point(Point(Some(coord))) => {
assert_eq!(coord.x, 10.0);
Expand All @@ -407,7 +584,9 @@ mod tests {
}

// point(x, y, z, m)
let wkt = <Wkt<f64>>::from_str("POINTZM (10 20.1 5 80)").ok().unwrap();
let wkt = <Wkt<f64>>::from_str("POINT ZM (10 20.1 5 80)")
.ok()
.unwrap();
match wkt {
Wkt::Point(Point(Some(coord))) => {
assert_eq!(coord.x, 10.0);
Expand Down
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