import { PointWritable } from '../types/path';
import { NamespaceResolver } from './NamespaceResolver';
/**
 * Extension parser for GPX files with namespace awareness.
 *
 * Parses extension data from various GPS manufacturers and formats,
 * handling different namespace prefixes and element structures.
 */
export declare class ExtensionParser {
    private namespaceResolver;
    constructor(namespaceResolver: NamespaceResolver);
    /**
     * Parse all extensions from an extensions element
     */
    parseExtensions(extensionsElement: Element, trackPoint: PointWritable): void;
    /**
     * Parse heart rate from various formats:
     * - ns3:hr / gpxtpx:hr (Garmin)
     * - heartrate (Amazfit)
     * - hr (generic)
     */
    private parseHeartRate;
    /**
     * Parse cadence from various formats:
     * - ns3:cad / gpxtpx:cad (Garmin)
     * - gpxdata:cadence (Cluetrust/Movescount)
     * - cadence (generic)
     */
    private parseCadence;
    /**
     * Parse temperature from various formats:
     * - gpxtpx:atemp (Garmin ambient temperature)
     * - gpxdata:temp (Cluetrust)
     * - temperature (generic)
     */
    private parseTemperature;
    /**
     * Parse power from custom power extensions
     * - power (custom format used in sample.gpx)
     */
    private parsePower;
    /**
     * Generic method to find extension values using the field mapping
     */
    private findExtensionValue;
    /**
     * Utility method to parse nested Garmin TrackPointExtension elements
     * (currently not used but kept for future enhancement)
     */
    private parseGarminTrackPointExtension;
}
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