<?php
/**
 * EWKT (Extended Well Known Text) Adapter
 */
class EWKT extends WKT
{

	/**
	 * Serialize geometries into an EWKT string.
	 *
	 * @param Geometry $geometry
	 *
	 * @return string The Extended-WKT string representation of the input geometries
	 */
	public function write(Geometry $geometry)
	{
		$srid = $geometry->SRID();
		$wkt = '';
		if ($srid) {
			$wkt = 'SRID=' . $srid . ';';
			$wkt .= $geometry->out('wkt');
			return $wkt;
		} else {
			return $geometry->out('wkt');
		}
	}
}