Struct FieldFilter 

pub struct FieldFilter {
    pub field: String,
    pub op: FieldFilterOp,
    pub value: FilterValue,
}

Structured filter that tests a single named attribute of a ShapefileFeature against a FilterValue using a FieldFilterOp.

Example

use oxigdal_shapefile::filter::{FieldFilter, FieldFilterOp, FilterValue};

// Match features where "NAME" == "Paris"
let filter = FieldFilter {
    field: "NAME".to_string(),
    op: FieldFilterOp::Eq,
    value: FilterValue::String("Paris".to_string()),
};

Fields

field: String

The attribute field name to test.

op: FieldFilterOp

The comparison operator.

value: FilterValue

The right-hand side value.

Implementations

impl FieldFilter

pub fn matches(&self, feature: &ShapefileFeature) -> bool

Returns true if feature satisfies this filter.

Rules:

• If the field is absent from the feature’s attributes, returns false.
• Eq/Ne: value-level equality for all types. Float equality is strict (== on f64); callers should avoid using Eq/Ne with floating-point values.
• Gt/Lt/Gte/Lte: numeric comparison; both the attribute and the filter value are cast to f64. Non-numeric types on either side return false.
• Contains/StartsWith: substring / prefix match on string types only; any other type returns false.

Trait Implementations

impl Clone for FieldFilter

fn clone(&self) -> FieldFilter

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FieldFilter

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.