netcdf4-wasm/dist/lazy/factory.js

NetCDF4 library compiled to WebAssembly with TypeScript bindings

"use strict";
// Lazy file reading - reader factory
//
// Picks the right LazyReader backend for a given source: a Blob/File in the
// browser, a path string in Node, or an already-constructed LazyReader passed
// through unchanged.
Object.defineProperty(exports, "__esModule", { value: true });
exports.createLazyReader = createLazyReader;
const blob_reader_1 = require("./blob-reader");
const node_reader_1 = require("./node-reader");
function isLazyReader(value) {
    return (typeof value === "object" &&
        value !== null &&
        typeof value.read === "function" &&
        typeof value.size === "number");
}
function createLazyReader(source) {
    if (isLazyReader(source)) {
        return source;
    }
    if (typeof Blob !== "undefined" && source instanceof Blob) {
        return new blob_reader_1.BlobReader(source);
    }
    if (typeof source === "string") {
        return new node_reader_1.NodeFileReader(source);
    }
    throw new Error("Unsupported lazy source: expected a LazyReader, Blob, or file path string");
}
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