Struct WrappedCompactThetaSketch 

pub struct WrappedCompactThetaSketch<'a> { /* private fields */ }

A zero-copy, read-only view over an already-serialized compact theta sketch’s bytes, usable directly as set-operation input without a full super::CompactThetaSketch::deserialize. Build one with Self::wrap.

The lifetime 'a ties this view to the borrowed &'a [u8] buffer it wraps — it cannot outlive the bytes it was built from.

Implementations

impl<'a> WrappedCompactThetaSketch<'a>

pub fn wrap(bytes: &'a [u8]) -> Result<Self, SketchError>

Wraps a serialized compact theta sketch’s bytes without copying or fully deserializing them.

pub fn get_estimate(&self) -> f64

Returns the current estimate of the number of distinct items in the wrapped sketch.

pub fn get_lower_bound(&self, num_std_dev: u8) -> Result<f64, SketchError>

Returns the lower bound of the confidence interval around Self::get_estimate. See ThetaSketch::get_lower_bound for the meaning of num_std_dev.

pub fn get_upper_bound(&self, num_std_dev: u8) -> Result<f64, SketchError>

Returns the upper bound of the confidence interval around Self::get_estimate. See ThetaSketch::get_lower_bound for the meaning of num_std_dev.

pub fn is_empty(&self) -> bool

Returns true if the wrapped sketch represents an empty set.

pub fn is_estimation_mode(&self) -> bool

Returns true if the wrapped sketch’s theta threshold is below 1.0 (i.e. Self::get_estimate is a statistical estimate rather than an exact count).

pub fn is_ordered(&self) -> bool

Returns true if the wrapped sketch’s retained entries are sorted by hash value.

pub fn get_theta(&self) -> f64

Returns the wrapped sketch’s current theta threshold (1.0 if not in estimation mode).

pub fn get_num_retained(&self) -> u32

Returns the number of entries retained by the wrapped sketch.

Trait Implementations

impl<'a> Send for WrappedCompactThetaSketch<'a>

impl<'a> ThetaInput for WrappedCompactThetaSketch<'a>