Struct flatgeobuf::FeatureIter

pub struct FeatureIter<R, S> { /* private fields */ }

Implementations

impl<R: Read> FeatureIter<R, NotSeekable>

pub fn cur_feature(&self) -> &FgbFeature

Return current feature

pub fn process_features<W: FeatureProcessor>( &mut self, out: &mut W ) -> Result<()>

Read and process all selected features

impl<R: Read + Seek> FeatureIter<R, Seekable>

pub fn cur_feature(&self) -> &FgbFeature

Return current feature

pub fn process_features<W: FeatureProcessor>( &mut self, out: &mut W ) -> Result<()>

Read and process all selected features

impl<R: Read, S> FeatureIter<R, S>

pub fn header(&self) -> Header<'_>

Header information

pub fn features_count(&self) -> Option<usize>

Number of selected features (None for undefined feature count)

Trait Implementations

impl<R: Read> FallibleStreamingIterator for FeatureIter<R, NotSeekable>

FallibleStreamingIterator differs from the standard library’s Iterator in two ways:

• each call to next can fail.
• returned FgbFeature is valid until next is called again or FgbReader is reset or finalized.

While these iterators cannot be used with Rust for loops, while let loops offer a similar level of ergonomics:

use flatgeobuf::*;

while let Some(feature) = fgb.next()? {
    let props = feature.properties()?;
    println!("{}", props["name"]);
}

type Item = FgbFeature

The type being iterated over.

type Error = Error

The error type of iteration.

fn advance(&mut self) -> Result<()>

Advances the iterator to the next position.

fn get(&self) -> Option<&FgbFeature>

Returns the current element.

fn size_hint(&self) -> (usize, Option<usize>)

Returns bounds on the number of remaining elements in the iterator.

fn next(&mut self) -> Result<Option<&Self::Item>, Self::Error>

Advances the iterator, returning the next element.

fn all<F>(&mut self, f: F) -> Result<bool, Self::Error>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Determines if all elements of the iterator satisfy a predicate.

fn any<F>(&mut self, f: F) -> Result<bool, Self::Error>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Determines if any elements of the iterator satisfy a predicate.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Borrows an iterator, rather than consuming it.

fn count(self) -> Result<usize, Self::Error>

where Self: Sized,

Returns the number of remaining elements in the iterator.

fn filter<F>(self, f: F) -> Filter<Self, F>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Returns an iterator which filters elements by a predicate.

fn find<F>(&mut self, f: F) -> Result<Option<&Self::Item>, Self::Error>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Returns the first element of the iterator which satisfies a predicate.

fn for_each<F>(self, f: F) -> Result<(), Self::Error>

where Self: Sized, F: FnMut(&Self::Item),

Calls a closure on each element of an iterator.

fn fuse(self) -> Fuse<Self>

where Self: Sized,

Returns an iterator which is well-behaved at the beginning and end of iteration.

fn map<F, B>(self, f: F) -> Map<Self, F, B>

where Self: Sized, F: FnMut(&Self::Item) -> B,

Returns an iterator which applies a transform to elements.

fn map_ref<F, B>(self, f: F) -> MapRef<Self, F>

where Self: Sized, F: Fn(&Self::Item) -> &B, B: ?Sized,

Returns an iterator which applies a transform to elements.

fn map_err<F, B>(self, f: F) -> MapErr<Self, F>

where Self: Sized, F: Fn(Self::Error) -> B,

Returns an iterator that applies a transform to errors.

fn nth(&mut self, n: usize) -> Result<Option<&Self::Item>, Self::Error>

Returns the nth element of the iterator.

fn position<F>(&mut self, f: F) -> Result<Option<usize>, Self::Error>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Returns the position of the first element matching a predicate.

fn skip(self, n: usize) -> Skip<Self>

where Self: Sized,

Returns an iterator which skips the first n elements.

fn skip_while<F>(self, f: F) -> SkipWhile<Self, F>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Returns an iterator which skips the first sequence of elements matching a predicate.

fn take(self, n: usize) -> Take<Self>

where Self: Sized,

Returns an iterator which only returns the first n elements.

fn take_while<F>(self, f: F) -> TakeWhile<Self, F>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Returns an iterator which only returns the first sequence of elements matching a predicate.

impl<R: Read + Seek> FallibleStreamingIterator for FeatureIter<R, Seekable>

FallibleStreamingIterator differs from the standard library’s Iterator in two ways:

• each call to next can fail.
• returned FgbFeature is valid until next is called again or FgbReader is reset or finalized.

While these iterators cannot be used with Rust for loops, while let loops offer a similar level of ergonomics:

use flatgeobuf::*;

while let Some(feature) = fgb.next()? {
    let props = feature.properties()?;
    println!("{}", props["name"]);
}

type Item = FgbFeature

The type being iterated over.

type Error = Error

The error type of iteration.

fn advance(&mut self) -> Result<()>

Advances the iterator to the next position.

fn get(&self) -> Option<&FgbFeature>

Returns the current element.

fn size_hint(&self) -> (usize, Option<usize>)

Returns bounds on the number of remaining elements in the iterator.

fn next(&mut self) -> Result<Option<&Self::Item>, Self::Error>

Advances the iterator, returning the next element.

fn all<F>(&mut self, f: F) -> Result<bool, Self::Error>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Determines if all elements of the iterator satisfy a predicate.

fn any<F>(&mut self, f: F) -> Result<bool, Self::Error>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Determines if any elements of the iterator satisfy a predicate.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Borrows an iterator, rather than consuming it.

fn count(self) -> Result<usize, Self::Error>

where Self: Sized,

Returns the number of remaining elements in the iterator.

fn filter<F>(self, f: F) -> Filter<Self, F>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Returns an iterator which filters elements by a predicate.

fn find<F>(&mut self, f: F) -> Result<Option<&Self::Item>, Self::Error>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Returns the first element of the iterator which satisfies a predicate.

fn for_each<F>(self, f: F) -> Result<(), Self::Error>

where Self: Sized, F: FnMut(&Self::Item),

Calls a closure on each element of an iterator.

fn fuse(self) -> Fuse<Self>

where Self: Sized,

Returns an iterator which is well-behaved at the beginning and end of iteration.

fn map<F, B>(self, f: F) -> Map<Self, F, B>

where Self: Sized, F: FnMut(&Self::Item) -> B,

Returns an iterator which applies a transform to elements.

fn map_ref<F, B>(self, f: F) -> MapRef<Self, F>

where Self: Sized, F: Fn(&Self::Item) -> &B, B: ?Sized,

Returns an iterator which applies a transform to elements.

fn map_err<F, B>(self, f: F) -> MapErr<Self, F>

where Self: Sized, F: Fn(Self::Error) -> B,

Returns an iterator that applies a transform to errors.

fn nth(&mut self, n: usize) -> Result<Option<&Self::Item>, Self::Error>

Returns the nth element of the iterator.

fn position<F>(&mut self, f: F) -> Result<Option<usize>, Self::Error>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Returns the position of the first element matching a predicate.

fn skip(self, n: usize) -> Skip<Self>

where Self: Sized,

Returns an iterator which skips the first n elements.

fn skip_while<F>(self, f: F) -> SkipWhile<Self, F>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Returns an iterator which skips the first sequence of elements matching a predicate.

fn take(self, n: usize) -> Take<Self>

where Self: Sized,

Returns an iterator which only returns the first n elements.

fn take_while<F>(self, f: F) -> TakeWhile<Self, F>

where Self: Sized, F: FnMut(&Self::Item) -> bool,

Returns an iterator which only returns the first sequence of elements matching a predicate.

impl<T: Read> GeozeroDatasource for FeatureIter<T, NotSeekable>

fn process<P: FeatureProcessor>(&mut self, processor: &mut P) -> Result<()>

Consume and process all selected features.

fn process_geom<P>(&mut self, processor: &mut P) -> Result<(), GeozeroError>

where P: GeomProcessor,

Consume and process geometries of all selected features.

impl<T: Read + Seek> GeozeroDatasource for FeatureIter<T, Seekable>

fn process<P: FeatureProcessor>(&mut self, processor: &mut P) -> Result<()>

Consume and process all selected features.

fn process_geom<P>(&mut self, processor: &mut P) -> Result<(), GeozeroError>

where P: GeomProcessor,

Consume and process geometries of all selected features.