55 lines
1.1 KiB
JavaScript
55 lines
1.1 KiB
JavaScript
/**
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* @module ol/format/XML
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*/
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import {isDocument, parse} from '../xml.js';
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/**
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* @classdesc
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* Generic format for reading non-feature XML data
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*
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* @abstract
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*/
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class XML {
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/**
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* Read the source document.
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*
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* @param {Document|Element|string} source The XML source.
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* @return {Object} An object representing the source.
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* @api
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*/
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read(source) {
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if (!source) {
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return null;
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} else if (typeof source === 'string') {
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const doc = parse(source);
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return this.readFromDocument(doc);
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} else if (isDocument(source)) {
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return this.readFromDocument(/** @type {Document} */ (source));
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} else {
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return this.readFromNode(/** @type {Element} */ (source));
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}
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}
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/**
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* @param {Document} doc Document.
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* @return {Object} Object
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*/
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readFromDocument(doc) {
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for (let n = doc.firstChild; n; n = n.nextSibling) {
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if (n.nodeType == Node.ELEMENT_NODE) {
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return this.readFromNode(/** @type {Element} */ (n));
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}
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}
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return null;
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}
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/**
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* @abstract
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* @param {Element} node Node.
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* @return {Object} Object
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*/
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readFromNode(node) {}
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}
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export default XML;
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