[−][src]Struct geos::WKTWriter
The WKTWriter
type is used to generate WKT
formatted output from [Geometry
].
Example
use geos::{Geometry, WKTWriter}; let point_geom = Geometry::new_from_wkt("POINT (2.5 2.5)").expect("Invalid geometry"); let mut writer = WKTWriter::new().expect("Failed to create WKTWriter"); assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5000000000000000 2.5000000000000000)");
Implementations
impl<'a> WKTWriter<'a>
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pub fn new() -> GResult<WKTWriter<'a>>
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Creates a new WKTWriter
instance.
Example
use geos::{Geometry, WKTWriter}; let point_geom = Geometry::new_from_wkt("POINT (2.5 2.5)").expect("Invalid geometry"); let mut writer = WKTWriter::new().expect("Failed to create WKTWriter"); assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5000000000000000 2.5000000000000000)");
pub fn new_with_context(
context: Arc<ContextHandle<'a>>
) -> GResult<WKTWriter<'a>>
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context: Arc<ContextHandle<'a>>
) -> GResult<WKTWriter<'a>>
Creates a new WKTWriter
instance with a given context.
Example
use geos::{ContextHandling, Geometry, WKTWriter}; let point_geom = Geometry::new_from_wkt("POINT (2.5 2.5)").expect("Invalid geometry"); let mut writer = WKTWriter::new_with_context(point_geom.clone_context()) .expect("Failed to create WKTWriter"); assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5000000000000000 2.5000000000000000)");
pub fn write<'b, G: Geom<'b>>(&mut self, geometry: &G) -> GResult<String>
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Writes out the given geometry
as WKT format.
Example
use geos::{Geometry, WKTWriter}; let point_geom = Geometry::new_from_wkt("POINT (2.5 2.5)").expect("Invalid geometry"); let mut writer = WKTWriter::new().expect("Failed to create WKTWriter"); assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5000000000000000 2.5000000000000000)");
pub fn set_rounding_precision(&mut self, precision: u32)
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Sets the precision
to be used when calling WKTWriter::write
. Often, what users
actually want is the WKTWriter::set_trim
method instead.
Example
use geos::{Geometry, WKTWriter}; let point_geom = Geometry::new_from_wkt("POINT (2.5 2.5)").expect("Invalid geometry"); let mut writer = WKTWriter::new().expect("Failed to create WKTWriter"); writer.set_rounding_precision(2); assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.50 2.50)"); writer.set_rounding_precision(4); assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5000 2.5000)");
pub fn set_output_dimension(&mut self, dimension: OutputDimension)
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Sets the number of dimensions to be used when calling WKTWriter::write
. By default, it
is 2.
Example
use geos::{Geometry, OutputDimension, WKTWriter}; let point_geom = Geometry::new_from_wkt("POINT (1.1 2.2 3.3)").expect("Invalid geometry"); let mut writer = WKTWriter::new().expect("Failed to create WKTWriter"); writer.set_trim(true); assert_eq!(writer.write(&point_geom).unwrap(), "POINT (1.1 2.2)"); writer.set_output_dimension(OutputDimension::ThreeD); assert_eq!(writer.write(&point_geom).unwrap(), "POINT Z (1.1 2.2 3.3)");
pub fn get_out_dimension(&self) -> GResult<OutputDimension>
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Returns the number of dimensions to be used when calling WKTWriter::write
. By default,
it is 2.
Example
use geos::{OutputDimension, WKTWriter}; let mut writer = WKTWriter::new().expect("Failed to create WKTWriter"); assert_eq!(writer.get_out_dimension(), Ok(OutputDimension::TwoD)); writer.set_output_dimension(OutputDimension::ThreeD); assert_eq!(writer.get_out_dimension(), Ok(OutputDimension::ThreeD));
pub fn set_trim(&mut self, trim: bool)
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Enables/disables trimming of unnecessary decimals.
Example
use geos::{Geometry, WKTWriter}; let point_geom = Geometry::new_from_wkt("POINT (2.5 2.5)").expect("Invalid geometry"); let mut writer = WKTWriter::new().expect("Failed to create WKTWriter"); assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5000000000000000 2.5000000000000000)"); writer.set_trim(true); assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5 2.5)");
pub fn set_old_3D(&mut self, use_old_3D: bool)
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Enables/disables old 3D/4D WKT style generation.
Example
use geos::{Geometry, OutputDimension, WKTWriter}; let point_geom = Geometry::new_from_wkt("POINT (2.5 2.5 2.5)").expect("Invalid geometry"); let mut writer = WKTWriter::new().expect("Failed to create WKTWriter"); writer.set_output_dimension(OutputDimension::ThreeD); writer.set_trim(true); assert_eq!(writer.write(&point_geom).unwrap(), "POINT Z (2.5 2.5 2.5)"); writer.set_old_3D(true); assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5 2.5 2.5)");
Trait Implementations
impl<'a> ContextHandling for WKTWriter<'a>
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type Context = Arc<ContextHandle<'a>>
fn get_raw_context(&self) -> GEOSContextHandle_t
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fn clone_context(&self) -> Arc<ContextHandle<'a>>
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impl<'a> ContextInteractions<'a> for WKTWriter<'a>
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fn set_context_handle(&mut self, context: ContextHandle<'a>)
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Set the context handle to the WKTWriter
.
use geos::{ContextInteractions, ContextHandle, WKTWriter}; let context_handle = ContextHandle::init().expect("invalid init"); let mut writer = WKTWriter::new().expect("failed to create WKT writer"); context_handle.set_notice_message_handler(Some(Box::new(|s| println!("new message: {}", s)))); writer.set_context_handle(context_handle);
fn get_context_handle(&self) -> &ContextHandle<'a>
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Get the context handle of the WKTWriter
.
use geos::{ContextInteractions, WKTWriter}; let mut writer = WKTWriter::new().expect("failed to create WKT writer"); let context = writer.get_context_handle(); context.set_notice_message_handler(Some(Box::new(|s| println!("new message: {}", s))));
fn get_last_error(&self) -> Option<String>
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fn get_last_notification(&self) -> Option<String>
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impl<'a> Drop for WKTWriter<'a>
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impl<'a> Send for WKTWriter<'a>
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impl<'a> Sync for WKTWriter<'a>
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Auto Trait Implementations
impl<'a> RefUnwindSafe for WKTWriter<'a>
impl<'a> Unpin for WKTWriter<'a>
impl<'a> UnwindSafe for WKTWriter<'a>
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,