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File-backed (zip) Daf writer class.

Source: R/zip_daf.R
ZipDaf.Rd

Concrete DafWriter subclass instantiated by zip_daf() for writable modes ("r+", "w", "w+"). The archive is append-only. Use zip_daf() to construct instances.

Usage

ZipDaf(
  name = character(0),
  internal = new.env(parent = emptyenv()),
  cache = new.env(parent = emptyenv()),
  axis_version_counter = new.env(parent = emptyenv()),
  vector_version_counter = new.env(parent = emptyenv()),
  matrix_version_counter = new.env(parent = emptyenv())
)

Arguments

name

Human-readable identifier for the Daf store.

internal

Internal per-store environment used by format backends to stash backend-specific state; reserved for package use.

cache

Three-tier cache environment (mapped / memory / query). See new_cache_env().

axis_version_counter

Environment tracking per-axis mutation counters; invalidates cached reads when an axis is modified.

vector_version_counter

Environment tracking per-vector mutation counters.

matrix_version_counter

Environment tracking per-matrix mutation counters.