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/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
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* full list of contributors). Published under the 2-clause BSD license.
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* See license.txt in the OpenLayers distribution or repository for the
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* full text of the license. */
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/**
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* @requires OpenLayers/Format/XML.js
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* @requires OpenLayers/Format/GML.js
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*/
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/**
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* Though required in the full build, if the GML format is excluded, we set
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* the namespace here.
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*/
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if(!OpenLayers.Format.GML) {
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OpenLayers.Format.GML = {};
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}
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/**
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* Class: OpenLayers.Format.GML.Base
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* Superclass for GML parsers.
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*
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* Inherits from:
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* - <OpenLayers.Format.XML>
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*/
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OpenLayers.Format.GML.Base = OpenLayers.Class(OpenLayers.Format.XML, {
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/**
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* Property: namespaces
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* {Object} Mapping of namespace aliases to namespace URIs.
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*/
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namespaces: {
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gml: "http://www.opengis.net/gml",
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xlink: "http://www.w3.org/1999/xlink",
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xsi: "http://www.w3.org/2001/XMLSchema-instance",
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wfs: "http://www.opengis.net/wfs" // this is a convenience for reading wfs:FeatureCollection
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},
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/**
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* Property: defaultPrefix
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*/
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defaultPrefix: "gml",
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/**
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* Property: schemaLocation
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* {String} Schema location for a particular minor version.
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*/
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schemaLocation: null,
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/**
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* APIProperty: featureType
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* {Array(String) or String} The local (without prefix) feature typeName(s).
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*/
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featureType: null,
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/**
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* APIProperty: featureNS
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* {String} The feature namespace. Must be set in the options at
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* construction.
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*/
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featureNS: null,
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/**
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* APIProperty: geometry
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* {String} Name of geometry element. Defaults to "geometry". If null, it
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* will be set on <read> when the first geometry is parsed.
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*/
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geometryName: "geometry",
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/**
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* APIProperty: extractAttributes
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* {Boolean} Extract attributes from GML. Default is true.
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*/
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extractAttributes: true,
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/**
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* APIProperty: srsName
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* {String} URI for spatial reference system. This is optional for
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* single part geometries and mandatory for collections and multis.
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* If set, the srsName attribute will be written for all geometries.
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* Default is null.
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*/
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srsName: null,
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/**
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* APIProperty: xy
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* {Boolean} Order of the GML coordinate true:(x,y) or false:(y,x)
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* Changing is not recommended, a new Format should be instantiated.
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*/
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xy: true,
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/**
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* Property: geometryTypes
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* {Object} Maps OpenLayers geometry class names to GML element names.
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* Use <setGeometryTypes> before accessing this property.
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*/
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geometryTypes: null,
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/**
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* Property: singleFeatureType
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* {Boolean} True if there is only 1 featureType, and not an array
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* of featuretypes.
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*/
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singleFeatureType: null,
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/**
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* Property: autoConfig
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* {Boolean} Indicates if the format was configured without a <featureNS>,
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* but auto-configured <featureNS> and <featureType> during read.
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* Subclasses making use of <featureType> auto-configuration should make
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* the first call to the <readNode> method (usually in the read method)
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* with true as 3rd argument, so the auto-configured featureType can be
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* reset and the format can be reused for subsequent reads with data from
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* different featureTypes. Set to false after read if you want to keep the
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* auto-configured values.
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*/
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/**
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* Property: regExes
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* Compiled regular expressions for manipulating strings.
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*/
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regExes: {
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trimSpace: (/^\s*|\s*$/g),
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removeSpace: (/\s*/g),
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splitSpace: (/\s+/),
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trimComma: (/\s*,\s*/g),
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featureMember: (/^(.*:)?featureMembers?$/)
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},
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/**
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* Constructor: OpenLayers.Format.GML.Base
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* Instances of this class are not created directly. Use the
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* <OpenLayers.Format.GML.v2> or <OpenLayers.Format.GML.v3> constructor
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* instead.
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*
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* Parameters:
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* options - {Object} An optional object whose properties will be set on
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* this instance.
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*
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* Valid options properties:
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* featureType - {Array(String) or String} Local (without prefix) feature
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* typeName(s) (required for write).
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* featureNS - {String} Feature namespace (required for write).
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* geometryName - {String} Geometry element name (required for write).
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*/
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initialize: function(options) {
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OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
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this.setGeometryTypes();
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if(options && options.featureNS) {
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this.setNamespace("feature", options.featureNS);
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}
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this.singleFeatureType = !options || (typeof options.featureType === "string");
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},
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/**
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* Method: read
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*
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* Parameters:
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* data - {DOMElement} A gml:featureMember element, a gml:featureMembers
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* element, or an element containing either of the above at any level.
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*
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* Returns:
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* {Array(<OpenLayers.Feature.Vector>)} An array of features.
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*/
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read: function(data) {
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if(typeof data == "string") {
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data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
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}
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if(data && data.nodeType == 9) {
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data = data.documentElement;
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}
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var features = [];
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this.readNode(data, {features: features}, true);
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if(features.length == 0) {
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// look for gml:featureMember elements
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var elements = this.getElementsByTagNameNS(
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data, this.namespaces.gml, "featureMember"
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);
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if(elements.length) {
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for(var i=0, len=elements.length; i<len; ++i) {
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this.readNode(elements[i], {features: features}, true);
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}
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} else {
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// look for gml:featureMembers elements (this is v3, but does no harm here)
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var elements = this.getElementsByTagNameNS(
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data, this.namespaces.gml, "featureMembers"
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);
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if(elements.length) {
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// there can be only one
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this.readNode(elements[0], {features: features}, true);
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}
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}
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}
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return features;
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},
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/**
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* Method: readNode
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* Shorthand for applying one of the named readers given the node
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* namespace and local name. Readers take two args (node, obj) and
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* generally extend or modify the second.
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*
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* Parameters:
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* node - {DOMElement} The node to be read (required).
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* obj - {Object} The object to be modified (optional).
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* first - {Boolean} Should be set to true for the first node read. This
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* is usually the readNode call in the read method. Without this being
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* set, auto-configured properties will stick on subsequent reads.
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*
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* Returns:
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* {Object} The input object, modified (or a new one if none was provided).
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*/
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readNode: function(node, obj, first) {
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// on subsequent calls of format.read(), we want to reset auto-
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// configured properties and auto-configure again.
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if (first === true && this.autoConfig === true) {
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this.featureType = null;
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delete this.namespaceAlias[this.featureNS];
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delete this.namespaces["feature"];
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this.featureNS = null;
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}
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// featureType auto-configuration
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if (!this.featureNS && (!(node.prefix in this.namespaces) &&
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node.parentNode.namespaceURI == this.namespaces["gml"] &&
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this.regExes.featureMember.test(node.parentNode.nodeName))) {
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this.featureType = node.nodeName.split(":").pop();
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this.setNamespace("feature", node.namespaceURI);
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this.featureNS = node.namespaceURI;
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this.autoConfig = true;
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}
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return OpenLayers.Format.XML.prototype.readNode.apply(this, [node, obj]);
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},
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/**
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* Property: readers
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* Contains public functions, grouped by namespace prefix, that will
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* be applied when a namespaced node is found matching the function
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* name. The function will be applied in the scope of this parser
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* with two arguments: the node being read and a context object passed
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* from the parent.
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*/
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readers: {
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"gml": {
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"_inherit": function(node, obj, container) {
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// To be implemented by version specific parsers
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},
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"featureMember": function(node, obj) {
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this.readChildNodes(node, obj);
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},
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"featureMembers": function(node, obj) {
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this.readChildNodes(node, obj);
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},
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"name": function(node, obj) {
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obj.name = this.getChildValue(node);
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},
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"boundedBy": function(node, obj) {
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var container = {};
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this.readChildNodes(node, container);
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if(container.components && container.components.length > 0) {
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obj.bounds = container.components[0];
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}
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},
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"Point": function(node, container) {
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var obj = {points: []};
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this.readChildNodes(node, obj);
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if(!container.components) {
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container.components = [];
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}
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container.components.push(obj.points[0]);
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},
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"coordinates": function(node, obj) {
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var str = this.getChildValue(node).replace(
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this.regExes.trimSpace, ""
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);
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str = str.replace(this.regExes.trimComma, ",");
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var pointList = str.split(this.regExes.splitSpace);
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var coords;
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var numPoints = pointList.length;
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var points = new Array(numPoints);
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for(var i=0; i<numPoints; ++i) {
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coords = pointList[i].split(",");
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if (this.xy) {
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points[i] = new OpenLayers.Geometry.Point(
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coords[0], coords[1], coords[2]
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);
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} else {
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points[i] = new OpenLayers.Geometry.Point(
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coords[1], coords[0], coords[2]
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);
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}
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}
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obj.points = points;
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},
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"coord": function(node, obj) {
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var coord = {};
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this.readChildNodes(node, coord);
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if(!obj.points) {
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obj.points = [];
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}
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obj.points.push(new OpenLayers.Geometry.Point(
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coord.x, coord.y, coord.z
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));
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},
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"X": function(node, coord) {
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coord.x = this.getChildValue(node);
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},
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"Y": function(node, coord) {
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coord.y = this.getChildValue(node);
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},
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"Z": function(node, coord) {
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coord.z = this.getChildValue(node);
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},
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"MultiPoint": function(node, container) {
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var obj = {components: []};
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this.readers.gml._inherit.apply(this, [node, obj, container]);
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this.readChildNodes(node, obj);
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container.components = [
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new OpenLayers.Geometry.MultiPoint(obj.components)
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];
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},
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"pointMember": function(node, obj) {
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this.readChildNodes(node, obj);
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},
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"LineString": function(node, container) {
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var obj = {};
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this.readers.gml._inherit.apply(this, [node, obj, container]);
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this.readChildNodes(node, obj);
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if(!container.components) {
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container.components = [];
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}
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container.components.push(
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new OpenLayers.Geometry.LineString(obj.points)
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);
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},
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"MultiLineString": function(node, container) {
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var obj = {components: []};
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this.readers.gml._inherit.apply(this, [node, obj, container]);
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this.readChildNodes(node, obj);
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container.components = [
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new OpenLayers.Geometry.MultiLineString(obj.components)
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];
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},
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"lineStringMember": function(node, obj) {
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this.readChildNodes(node, obj);
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},
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"Polygon": function(node, container) {
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347
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var obj = {outer: null, inner: []};
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this.readers.gml._inherit.apply(this, [node, obj, container]);
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this.readChildNodes(node, obj);
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obj.inner.unshift(obj.outer);
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if(!container.components) {
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container.components = [];
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}
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container.components.push(
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new OpenLayers.Geometry.Polygon(obj.inner)
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);
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},
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"LinearRing": function(node, obj) {
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var container = {};
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this.readers.gml._inherit.apply(this, [node, container]);
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this.readChildNodes(node, container);
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obj.components = [new OpenLayers.Geometry.LinearRing(
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container.points
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)];
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},
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"MultiPolygon": function(node, container) {
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var obj = {components: []};
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this.readers.gml._inherit.apply(this, [node, obj, container]);
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this.readChildNodes(node, obj);
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container.components = [
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new OpenLayers.Geometry.MultiPolygon(obj.components)
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];
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},
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"polygonMember": function(node, obj) {
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this.readChildNodes(node, obj);
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},
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"GeometryCollection": function(node, container) {
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378
|
var obj = {components: []};
|
|
379
|
this.readers.gml._inherit.apply(this, [node, obj, container]);
|
|
380
|
this.readChildNodes(node, obj);
|
|
381
|
container.components = [
|
|
382
|
new OpenLayers.Geometry.Collection(obj.components)
|
|
383
|
];
|
|
384
|
},
|
|
385
|
"geometryMember": function(node, obj) {
|
|
386
|
this.readChildNodes(node, obj);
|
|
387
|
}
|
|
388
|
},
|
|
389
|
"feature": {
|
|
390
|
"*": function(node, obj) {
|
|
391
|
// The node can either be named like the featureType, or it
|
|
392
|
// can be a child of the feature:featureType. Children can be
|
|
393
|
// geometry or attributes.
|
|
394
|
var name;
|
|
395
|
var local = node.localName || node.nodeName.split(":").pop();
|
|
396
|
// Since an attribute can have the same name as the feature type
|
|
397
|
// we only want to read the node as a feature if the parent
|
|
398
|
// node can have feature nodes as children. In this case, the
|
|
399
|
// obj.features property is set.
|
|
400
|
if (obj.features) {
|
|
401
|
if (!this.singleFeatureType &&
|
|
402
|
(OpenLayers.Util.indexOf(this.featureType, local) !== -1)) {
|
|
403
|
name = "_typeName";
|
|
404
|
} else if(local === this.featureType) {
|
|
405
|
name = "_typeName";
|
|
406
|
}
|
|
407
|
} else {
|
|
408
|
// Assume attribute elements have one child node and that the child
|
|
409
|
// is a text node. Otherwise assume it is a geometry node.
|
|
410
|
if(node.childNodes.length == 0 ||
|
|
411
|
(node.childNodes.length == 1 && node.firstChild.nodeType == 3)) {
|
|
412
|
if(this.extractAttributes) {
|
|
413
|
name = "_attribute";
|
|
414
|
}
|
|
415
|
} else {
|
|
416
|
name = "_geometry";
|
|
417
|
}
|
|
418
|
}
|
|
419
|
if(name) {
|
|
420
|
this.readers.feature[name].apply(this, [node, obj]);
|
|
421
|
}
|
|
422
|
},
|
|
423
|
"_typeName": function(node, obj) {
|
|
424
|
var container = {components: [], attributes: {}};
|
|
425
|
this.readChildNodes(node, container);
|
|
426
|
// look for common gml namespaced elements
|
|
427
|
if(container.name) {
|
|
428
|
container.attributes.name = container.name;
|
|
429
|
}
|
|
430
|
var feature = new OpenLayers.Feature.Vector(
|
|
431
|
container.components[0], container.attributes
|
|
432
|
);
|
|
433
|
if (!this.singleFeatureType) {
|
|
434
|
feature.type = node.nodeName.split(":").pop();
|
|
435
|
feature.namespace = node.namespaceURI;
|
|
436
|
}
|
|
437
|
var fid = node.getAttribute("fid") ||
|
|
438
|
this.getAttributeNS(node, this.namespaces["gml"], "id");
|
|
439
|
if(fid) {
|
|
440
|
feature.fid = fid;
|
|
441
|
}
|
|
442
|
if(this.internalProjection && this.externalProjection &&
|
|
443
|
feature.geometry) {
|
|
444
|
feature.geometry.transform(
|
|
445
|
this.externalProjection, this.internalProjection
|
|
446
|
);
|
|
447
|
}
|
|
448
|
if(container.bounds) {
|
|
449
|
feature.bounds = container.bounds;
|
|
450
|
}
|
|
451
|
obj.features.push(feature);
|
|
452
|
},
|
|
453
|
"_geometry": function(node, obj) {
|
|
454
|
if (!this.geometryName) {
|
|
455
|
this.geometryName = node.nodeName.split(":").pop();
|
|
456
|
}
|
|
457
|
this.readChildNodes(node, obj);
|
|
458
|
},
|
|
459
|
"_attribute": function(node, obj) {
|
|
460
|
var local = node.localName || node.nodeName.split(":").pop();
|
|
461
|
var value = this.getChildValue(node);
|
|
462
|
obj.attributes[local] = value;
|
|
463
|
}
|
|
464
|
},
|
|
465
|
"wfs": {
|
|
466
|
"FeatureCollection": function(node, obj) {
|
|
467
|
this.readChildNodes(node, obj);
|
|
468
|
}
|
|
469
|
}
|
|
470
|
},
|
|
471
|
|
|
472
|
/**
|
|
473
|
* Method: write
|
|
474
|
*
|
|
475
|
* Parameters:
|
|
476
|
* features - {Array(<OpenLayers.Feature.Vector>) | OpenLayers.Feature.Vector}
|
|
477
|
* An array of features or a single feature.
|
|
478
|
*
|
|
479
|
* Returns:
|
|
480
|
* {String} Given an array of features, a doc with a gml:featureMembers
|
|
481
|
* element will be returned. Given a single feature, a doc with a
|
|
482
|
* gml:featureMember element will be returned.
|
|
483
|
*/
|
|
484
|
write: function(features) {
|
|
485
|
var name;
|
|
486
|
if(OpenLayers.Util.isArray(features)) {
|
|
487
|
name = "featureMembers";
|
|
488
|
} else {
|
|
489
|
name = "featureMember";
|
|
490
|
}
|
|
491
|
var root = this.writeNode("gml:" + name, features);
|
|
492
|
this.setAttributeNS(
|
|
493
|
root, this.namespaces["xsi"],
|
|
494
|
"xsi:schemaLocation", this.schemaLocation
|
|
495
|
);
|
|
496
|
|
|
497
|
return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
|
|
498
|
},
|
|
499
|
|
|
500
|
/**
|
|
501
|
* Property: writers
|
|
502
|
* As a compliment to the readers property, this structure contains public
|
|
503
|
* writing functions grouped by namespace alias and named like the
|
|
504
|
* node names they produce.
|
|
505
|
*/
|
|
506
|
writers: {
|
|
507
|
"gml": {
|
|
508
|
"featureMember": function(feature) {
|
|
509
|
var node = this.createElementNSPlus("gml:featureMember");
|
|
510
|
this.writeNode("feature:_typeName", feature, node);
|
|
511
|
return node;
|
|
512
|
},
|
|
513
|
"MultiPoint": function(geometry) {
|
|
514
|
var node = this.createElementNSPlus("gml:MultiPoint");
|
|
515
|
var components = geometry.components || [geometry];
|
|
516
|
for(var i=0, ii=components.length; i<ii; ++i) {
|
|
517
|
this.writeNode("pointMember", components[i], node);
|
|
518
|
}
|
|
519
|
return node;
|
|
520
|
},
|
|
521
|
"pointMember": function(geometry) {
|
|
522
|
var node = this.createElementNSPlus("gml:pointMember");
|
|
523
|
this.writeNode("Point", geometry, node);
|
|
524
|
return node;
|
|
525
|
},
|
|
526
|
"MultiLineString": function(geometry) {
|
|
527
|
var node = this.createElementNSPlus("gml:MultiLineString");
|
|
528
|
var components = geometry.components || [geometry];
|
|
529
|
for(var i=0, ii=components.length; i<ii; ++i) {
|
|
530
|
this.writeNode("lineStringMember", components[i], node);
|
|
531
|
}
|
|
532
|
return node;
|
|
533
|
},
|
|
534
|
"lineStringMember": function(geometry) {
|
|
535
|
var node = this.createElementNSPlus("gml:lineStringMember");
|
|
536
|
this.writeNode("LineString", geometry, node);
|
|
537
|
return node;
|
|
538
|
},
|
|
539
|
"MultiPolygon": function(geometry) {
|
|
540
|
var node = this.createElementNSPlus("gml:MultiPolygon");
|
|
541
|
var components = geometry.components || [geometry];
|
|
542
|
for(var i=0, ii=components.length; i<ii; ++i) {
|
|
543
|
this.writeNode(
|
|
544
|
"polygonMember", components[i], node
|
|
545
|
);
|
|
546
|
}
|
|
547
|
return node;
|
|
548
|
},
|
|
549
|
"polygonMember": function(geometry) {
|
|
550
|
var node = this.createElementNSPlus("gml:polygonMember");
|
|
551
|
this.writeNode("Polygon", geometry, node);
|
|
552
|
return node;
|
|
553
|
},
|
|
554
|
"GeometryCollection": function(geometry) {
|
|
555
|
var node = this.createElementNSPlus("gml:GeometryCollection");
|
|
556
|
for(var i=0, len=geometry.components.length; i<len; ++i) {
|
|
557
|
this.writeNode("geometryMember", geometry.components[i], node);
|
|
558
|
}
|
|
559
|
return node;
|
|
560
|
},
|
|
561
|
"geometryMember": function(geometry) {
|
|
562
|
var node = this.createElementNSPlus("gml:geometryMember");
|
|
563
|
var child = this.writeNode("feature:_geometry", geometry);
|
|
564
|
node.appendChild(child.firstChild);
|
|
565
|
return node;
|
|
566
|
}
|
|
567
|
},
|
|
568
|
"feature": {
|
|
569
|
"_typeName": function(feature) {
|
|
570
|
var node = this.createElementNSPlus("feature:" + this.featureType, {
|
|
571
|
attributes: {fid: feature.fid}
|
|
572
|
});
|
|
573
|
if(feature.geometry) {
|
|
574
|
this.writeNode("feature:_geometry", feature.geometry, node);
|
|
575
|
}
|
|
576
|
for(var name in feature.attributes) {
|
|
577
|
var value = feature.attributes[name];
|
|
578
|
if(value != null) {
|
|
579
|
this.writeNode(
|
|
580
|
"feature:_attribute",
|
|
581
|
{name: name, value: value}, node
|
|
582
|
);
|
|
583
|
}
|
|
584
|
}
|
|
585
|
return node;
|
|
586
|
},
|
|
587
|
"_geometry": function(geometry) {
|
|
588
|
if(this.externalProjection && this.internalProjection) {
|
|
589
|
geometry = geometry.clone().transform(
|
|
590
|
this.internalProjection, this.externalProjection
|
|
591
|
);
|
|
592
|
}
|
|
593
|
var node = this.createElementNSPlus(
|
|
594
|
"feature:" + this.geometryName
|
|
595
|
);
|
|
596
|
var type = this.geometryTypes[geometry.CLASS_NAME];
|
|
597
|
var child = this.writeNode("gml:" + type, geometry, node);
|
|
598
|
if(this.srsName) {
|
|
599
|
child.setAttribute("srsName", this.srsName);
|
|
600
|
}
|
|
601
|
return node;
|
|
602
|
},
|
|
603
|
"_attribute": function(obj) {
|
|
604
|
return this.createElementNSPlus("feature:" + obj.name, {
|
|
605
|
value: obj.value
|
|
606
|
});
|
|
607
|
}
|
|
608
|
},
|
|
609
|
"wfs": {
|
|
610
|
"FeatureCollection": function(features) {
|
|
611
|
/**
|
|
612
|
* This is only here because GML2 only describes abstract
|
|
613
|
* feature collections. Typically, you would not be using
|
|
614
|
* the GML format to write wfs elements. This just provides
|
|
615
|
* some way to write out lists of features. GML3 defines the
|
|
616
|
* featureMembers element, so that is used by default instead.
|
|
617
|
*/
|
|
618
|
var node = this.createElementNSPlus("wfs:FeatureCollection");
|
|
619
|
for(var i=0, len=features.length; i<len; ++i) {
|
|
620
|
this.writeNode("gml:featureMember", features[i], node);
|
|
621
|
}
|
|
622
|
return node;
|
|
623
|
}
|
|
624
|
}
|
|
625
|
},
|
|
626
|
|
|
627
|
/**
|
|
628
|
* Method: setGeometryTypes
|
|
629
|
* Sets the <geometryTypes> mapping.
|
|
630
|
*/
|
|
631
|
setGeometryTypes: function() {
|
|
632
|
this.geometryTypes = {
|
|
633
|
"OpenLayers.Geometry.Point": "Point",
|
|
634
|
"OpenLayers.Geometry.MultiPoint": "MultiPoint",
|
|
635
|
"OpenLayers.Geometry.LineString": "LineString",
|
|
636
|
"OpenLayers.Geometry.MultiLineString": "MultiLineString",
|
|
637
|
"OpenLayers.Geometry.Polygon": "Polygon",
|
|
638
|
"OpenLayers.Geometry.MultiPolygon": "MultiPolygon",
|
|
639
|
"OpenLayers.Geometry.Collection": "GeometryCollection"
|
|
640
|
};
|
|
641
|
},
|
|
642
|
|
|
643
|
CLASS_NAME: "OpenLayers.Format.GML.Base"
|
|
644
|
|
|
645
|
});
|