Lionel Sambuc
661abbc9f4
This is used to wrap the filters within an implicit bounding box, which corresponds to the view port optionally provided by the users. The intersection is automatically computed between the query results and the ViewPort, whenever it is specified.
50 lines
1.5 KiB
Rust
50 lines
1.5 KiB
Rust
use mercator_db::DataBase;
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use super::expressions::Predictor;
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use super::symbols::*;
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impl Predictor for Projection {
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fn predict(&self, db: &DataBase) -> Result<f64, String> {
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match self {
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Projection::Nifti(_, _, bag) => bag.predict(db),
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Projection::JSON(_, _, bag) => bag.predict(db),
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}
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}
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}
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impl Predictor for Bag {
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fn predict(&self, db: &DataBase) -> Result<f64, String> {
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match self {
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Bag::ViewPort(bag) => bag.predict(db),
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Bag::Distinct(bag) => bag.predict(db),
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Bag::Filter(_, bag) => bag.predict(db),
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Bag::Complement(bag) => Ok(db.space(bag.space())?.volume() - bag.predict(db)?),
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Bag::Intersection(lh, rh) => {
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let l = lh.predict(db)?;
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let r = rh.predict(db)?;
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if l < r {
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Ok(l)
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} else {
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Ok(r)
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}
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}
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Bag::Union(lh, rh) => Ok(lh.predict(db)? + rh.predict(db)?),
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Bag::Bag(bags) => {
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let mut s = 0.0;
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for bag in bags {
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s += bag.predict(db)?;
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}
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Ok(s)
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}
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Bag::Inside(shape) => shape.predict(db),
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Bag::Outside(shape) => Ok(db.space(shape.space())?.volume() - shape.predict(db)?),
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}
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}
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}
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impl Predictor for Shape {
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fn predict(&self, _db: &DataBase) -> Result<f64, String> {
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Ok(self.volume())
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}
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}
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