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| Viewing file: Select action/file-type: /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the Clear BSD license.
* See http://svn.openlayers.org/trunk/openlayers/license.txt for the
* full text of the license. */
/**
* @requires OpenLayers/Format/XML.js
* @requires OpenLayers/Format/KML.js
* @requires OpenLayers/Format/GML.js
* @requires OpenLayers/Format/GML/v2.js
* @requires OpenLayers/Format/SLD/v1_0_0.js
* @requires OpenLayers/Format/OWSContext.js
* @requires OpenLayers/Format/OWSCommon/v1_0_0.js
*/
/**
* Class: OpenLayers.Format.OWSContext.v0_3_1
* Read and write OWSContext version 0.3.1.
*
* Inherits from:
* - <OpenLayers.Format.XML>
*/
OpenLayers.Format.OWSContext.v0_3_1 = OpenLayers.Class(OpenLayers.Format.XML, {
/**
* Property: namespaces
* {Object} Mapping of namespace aliases to namespace URIs.
*/
namespaces: {
owc: "http://www.opengis.net/ows-context",
gml: "http://www.opengis.net/gml",
kml: "http://www.opengis.net/kml/2.2",
ogc: "http://www.opengis.net/ogc",
ows: "http://www.opengis.net/ows",
sld: "http://www.opengis.net/sld",
xlink: "http://www.w3.org/1999/xlink",
xsi: "http://www.w3.org/2001/XMLSchema-instance"
},
/**
* Constant: VERSION
* {String} 0.3.1
*/
VERSION: "0.3.1",
/**
* Property: schemaLocation
* {String} Schema location
*/
schemaLocation: "http://www.opengis.net/ows-context http://www.ogcnetwork.net/schemas/owc/0.3.1/owsContext.xsd",
/**
* Property: defaultPrefix
* {String} Default namespace prefix to use.
*/
defaultPrefix: "owc",
/**
* APIProperty: extractAttributes
* {Boolean} Extract attributes from GML. Default is true.
*/
extractAttributes: true,
/**
* APIProperty: xy
* {Boolean} Order of the GML coordinate true:(x,y) or false:(y,x)
* Changing is not recommended, a new Format should be instantiated.
*/
xy: true,
/**
* Property: regExes
* Compiled regular expressions for manipulating strings.
*/
regExes: {
trimSpace: (/^\s*|\s*$/g),
removeSpace: (/\s*/g),
splitSpace: (/\s+/),
trimComma: (/\s*,\s*/g)
},
/**
* Property: featureNS
* {String} The namespace uri to use for writing InlineGeometry
*/
featureNS: "http://mapserver.gis.umn.edu/mapserver",
/**
* Property: featureType
* {String} The name to use as the feature type when writing out
* InlineGeometry
*/
featureType: 'vector',
/**
* Property: geometryName
* {String} The name to use for the geometry attribute when writing out
* InlineGeometry
*/
geometryName: 'geometry',
/**
* Property: nestingLayerLookup
* {Object} Hashtable lookup for nesting layer nodes. Used while writing
* the OWS context document. It is necessary to keep track of the
* nestingPaths for which nesting layer nodes have already been
* created, so (nesting) layer nodes are added to those nodes.
*
* For example:
*
* If there are three layers with nestingPaths:
* layer1.metadata.nestingPath = "a/b/"
* layer2.metadata.nestingPath = "a/b/"
* layer2.metadata.nestingPath = "a/c"
*
* then a nesting layer node "a" should be created once and added
* to the resource list, a nesting layer node "b" should be created
* once and added under "a", and a nesting layer node "c" should be
* created and added under "a". The lookup paths for these nodes
* will be "a", "a/b", and "a/c" respectively.
*/
nestingLayerLookup: null,
/**
* Constructor: OpenLayers.Format.OWSContext.v0_3_1
* Instances of this class are not created directly. Use the
* <OpenLayers.Format.OWSContext> constructor instead.
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* this instance.
*/
initialize: function(options) {
OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
OpenLayers.Format.GML.v2.prototype.setGeometryTypes.call(this);
},
/**
* Method: setNestingPath
* Set the nestingPath property of the layer depending on the position
* of the layer in hierarchy of layers.
*
* Parameters:
* l - {Object} An object that may have a layersContext array property.
*
*/
setNestingPath : function(l){
if(l.layersContext){
for (var i = 0, len = l.layersContext.length; i < len; i++) {
var layerContext = l.layersContext[i];
var nPath = [];
var nTitle = l.title || "";
if(l.metadata && l.metadata.nestingPath){
nPath = l.metadata.nestingPath.slice();
}
if (nTitle != "") {
nPath.push(nTitle);
}
layerContext.metadata.nestingPath = nPath;
if(layerContext.layersContext){
this.setNestingPath(layerContext);
}
}
}
},
/**
* Function: decomposeNestingPath
* Takes a nestingPath like "a/b/c" and decomposes it into subpaths:
* "a", "a/b", "a/b/c"
*
* Parameters:
* nPath - {Array} the nesting path
*
* Returns:
* Array({String}) Array with subpaths, or empty array if there is nothing
* to decompose
*/
decomposeNestingPath: function(nPath){
var a = [];
if (nPath instanceof Array) {
while (nPath.length > 0) {
a.push(nPath.slice());
nPath.pop();
}
a.reverse();
}
return a;
},
/**
* APIMethod: read
* Read OWS context data from a string or DOMElement, and return a list
* of layers.
*
* Parameters:
* data - {String} or {DOMElement} data to read/parse.
*
* Returns:
* {Object} The context object with a flat layer list as a property named
* layersContext.
*/
read: function(data) {
if(typeof data == "string") {
data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
}
if(data && data.nodeType == 9) {
data = data.documentElement;
}
var context = {};
this.readNode(data, context);
// since an OWSContext can be nested we need to go through this
// structure recursively
this.setNestingPath({layersContext : context.layersContext});
// after nesting path has been set, create a flat list of layers
var layers = [];
this.processLayer(layers, context);
delete context.layersContext;
context.layersContext = layers;
return context;
},
/**
* Method: processLayer
* Recursive function to get back a flat list of layers from the hierarchic
* layer structure.
*
* Parameters:
* layerArray - {Array({Object})} Array of layerContext objects
* layerContext - {Object} layerContext object
*/
processLayer: function(layerArray, layer) {
if (layer.layersContext) {
for (var i=0, len = layer.layersContext.length; i<len; i++) {
var l = layer.layersContext[i];
layerArray.push(l);
if (l.layersContext) {
this.processLayer(layerArray, l);
}
}
}
},
/**
* APIMethod: write
*
* Parameters:
* context - {Object} An object representing the map context.
* options - {Object} Optional object.
*
* Returns:
* {String} An OWS Context document string.
*/
write: function(context, options) {
var name = "OWSContext";
this.nestingLayerLookup = {}; //start with empty lookup
options = options || {};
OpenLayers.Util.applyDefaults(options, context);
var root = this.writeNode(name, options);
this.nestingLayerLookup = null; //clear lookup
this.setAttributeNS(
root, this.namespaces["xsi"],
"xsi:schemaLocation", this.schemaLocation
);
return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
},
/**
* Property: readers
* Contains public functions, grouped by namespace prefix, that will
* be applied when a namespaced node is found matching the function
* name. The function will be applied in the scope of this parser
* with two arguments: the node being read and a context object passed
* from the parent.
*/
readers: {
"kml": {
"Document": function(node, obj) {
obj.features = new OpenLayers.Format.KML(
{kmlns: this.namespaces.kml,
extractStyles: true}).read(node);
}
},
"owc": {
"OWSContext": function(node, obj) {
this.readChildNodes(node, obj);
},
"General": function(node, obj) {
this.readChildNodes(node, obj);
},
"ResourceList": function(node, obj) {
this.readChildNodes(node, obj);
},
"Layer": function(node, obj) {
var layerContext = {
metadata: {},
visibility: (node.getAttribute("hidden") != "1"),
queryable: (node.getAttribute("queryable") == "1"),
opacity: ((node.getAttribute("opacity") != null) ?
parseFloat(node.getAttribute("opacity")) : null),
name: node.getAttribute("name"),
/* A category layer is a dummy layer meant for creating
hierarchies. It is not a physical layer in the
OpenLayers sense. The assumption we make here is that
category layers do not have a name attribute */
categoryLayer: (node.getAttribute("name") == null),
formats: [],
styles: []
};
if (!obj.layersContext) {
obj.layersContext = [];
}
obj.layersContext.push(layerContext);
this.readChildNodes(node, layerContext);
},
"InlineGeometry": function(node, obj) {
obj.features = [];
var elements = this.getElementsByTagNameNS(node,
this.namespaces.gml, "featureMember");
var el;
if (elements.length >= 1) {
el = elements[0];
}
if (el && el.firstChild) {
var featurenode = (el.firstChild.nextSibling) ?
el.firstChild.nextSibling : el.firstChild;
this.setNamespace("feature", featurenode.namespaceURI);
this.featureType = featurenode.localName ||
featurenode.nodeName.split(":").pop();
this.readChildNodes(node, obj);
}
},
"Server": function(node, obj) {
// when having multiple Server types, we prefer WMS
if ((!obj.service && !obj.version) ||
(obj.service !=
OpenLayers.Format.Context.serviceTypes.WMS)) {
obj.service = node.getAttribute("service");
obj.version = node.getAttribute("version");
this.readChildNodes(node, obj);
}
},
"Name": function(node, obj) {
obj.name = this.getChildValue(node);
this.readChildNodes(node, obj);
},
"Title": function(node, obj) {
obj.title = this.getChildValue(node);
this.readChildNodes(node, obj);
},
"StyleList": function(node, obj) {
this.readChildNodes(node, obj.styles);
},
"Style": function(node, obj) {
var style = {};
obj.push(style);
this.readChildNodes(node, style);
},
"LegendURL": function(node, obj) {
var legend = {};
obj.legend = legend;
this.readChildNodes(node, legend);
},
"OnlineResource": function(node, obj) {
obj.url = this.getAttributeNS(node, this.namespaces.xlink,
"href");
this.readChildNodes(node, obj);
}
},
"ows": OpenLayers.Format.OWSCommon.v1_0_0.prototype.readers.ows,
"gml": OpenLayers.Format.GML.v2.prototype.readers.gml,
"sld": OpenLayers.Format.SLD.v1_0_0.prototype.readers.sld,
"feature": OpenLayers.Format.GML.v2.prototype.readers.feature
},
/**
* Property: writers
* As a compliment to the readers property, this structure contains public
* writing functions grouped by namespace alias and named like the
* node names they produce.
*/
writers: {
"owc": {
"OWSContext": function(options) {
var node = this.createElementNSPlus("OWSContext", {
attributes: {
version: this.VERSION,
id: options.id || OpenLayers.Util.createUniqueID("OpenLayers_OWSContext_")
}
});
this.writeNode("General", options, node);
this.writeNode("ResourceList", options, node);
return node;
},
"General": function(options) {
var node = this.createElementNSPlus("General");
this.writeNode("ows:BoundingBox", options, node);
this.writeNode("ows:Title", options.title || 'OpenLayers OWSContext', node);
return node;
},
"ResourceList": function(options) {
var node = this.createElementNSPlus("ResourceList");
for (var i=0, len=options.layers.length; i<len; i++) {
var layer = options.layers[i];
var decomposedPath = this.decomposeNestingPath(layer.metadata.nestingPath);
this.writeNode("_Layer", {layer: layer, subPaths: decomposedPath}, node);
}
return node;
},
"Server": function(options) {
var node = this.createElementNSPlus("Server", {attributes: {
version: options.version,
service: options.service }
});
this.writeNode("OnlineResource", options, node);
return node;
},
"OnlineResource": function(options) {
var node = this.createElementNSPlus("OnlineResource", {attributes: {
"xlink:href": options.url }
});
return node;
},
"InlineGeometry": function(layer) {
var node = this.createElementNSPlus("InlineGeometry");
this.writeNode("gml:boundedBy", layer.getDataExtent(), node);
for (var i=0, len=layer.features.length; i<len; i++) {
this.writeNode("gml:featureMember", layer.features[i], node);
}
return node;
},
"StyleList": function(styles) {
var node = this.createElementNSPlus("StyleList");
for (var i=0, len=styles.length; i<len; i++) {
this.writeNode("Style", styles[i], node);
}
return node;
},
"Style": function(style) {
var node = this.createElementNSPlus("Style");
this.writeNode("Name", style, node);
this.writeNode("Title", style, node);
this.writeNode("LegendURL", style, node);
return node;
},
"Name": function(obj) {
var node = this.createElementNSPlus("Name", {
value: obj.name });
return node;
},
"Title": function(obj) {
var node = this.createElementNSPlus("Title", {
value: obj.title });
return node;
},
"LegendURL": function(style) {
var node = this.createElementNSPlus("LegendURL");
this.writeNode("OnlineResource", style.legend, node);
return node;
},
"_WMS": function(layer) {
var node = this.createElementNSPlus("Layer", {attributes: {
name: layer.params.LAYERS,
queryable: layer.queryable ? "1" : "0",
hidden: layer.visibility ? "0" : "1",
opacity: layer.opacity ? layer.opacity: null}
});
this.writeNode("ows:Title", layer.name, node);
this.writeNode("ows:OutputFormat", layer.params.FORMAT, node);
this.writeNode("Server", {service:
OpenLayers.Format.Context.serviceTypes.WMS,
version: layer.params.VERSION, url: layer.url}, node);
if (layer.metadata.styles && layer.metadata.styles.length > 0) {
this.writeNode("StyleList", layer.metadata.styles, node);
}
return node;
},
"_Layer": function(options) {
var layer, subPaths, node, title;
layer = options.layer;
subPaths = options.subPaths;
node = null;
title = null;
// subPaths is an array of an array
// recursively calling _Layer writer eats up subPaths, until a
// real writer is called and nodes are returned.
if(subPaths.length > 0){
var path = subPaths[0].join("/");
var index = path.lastIndexOf("/");
node = this.nestingLayerLookup[path];
title = (index > 0)?path.substring(index + 1, path.length):path;
if(!node){
// category layer
node = this.createElementNSPlus("Layer");
this.writeNode("ows:Title", title, node);
this.nestingLayerLookup[path] = node;
}
options.subPaths.shift();//remove a path after each call
this.writeNode("_Layer", options, node);
return node;
} else {
// write out the actual layer
if (layer instanceof OpenLayers.Layer.WMS) {
node = this.writeNode("_WMS", layer);
} else if (layer instanceof OpenLayers.Layer.Vector) {
if (layer.protocol instanceof OpenLayers.Protocol.WFS.v1) {
node = this.writeNode("_WFS", layer);
} else if (layer.protocol instanceof OpenLayers.Protocol.HTTP) {
if (layer.protocol.format instanceof OpenLayers.Format.GML) {
layer.protocol.format.version = "2.1.2";
node = this.writeNode("_GML", layer);
} else if (layer.protocol.format instanceof OpenLayers.Format.KML) {
layer.protocol.format.version = "2.2";
node = this.writeNode("_KML", layer);
}
} else {
// write out as inline GML since we have no idea
// about the original Format
this.setNamespace("feature", this.featureNS);
node = this.writeNode("_InlineGeometry", layer);
}
}
if (layer.options.maxScale) {
this.writeNode("sld:MinScaleDenominator",
layer.options.maxScale, node);
}
if (layer.options.minScale) {
this.writeNode("sld:MaxScaleDenominator",
layer.options.minScale, node);
}
this.nestingLayerLookup[layer.name] = node;
return node;
}
},
"_WFS": function(layer) {
var node = this.createElementNSPlus("Layer", {attributes: {
name: layer.protocol.featurePrefix + ":" + layer.protocol.featureType,
hidden: layer.visibility ? "0" : "1" }
});
this.writeNode("ows:Title", layer.name, node);
this.writeNode("Server", {service:
OpenLayers.Format.Context.serviceTypes.WFS,
version: layer.protocol.version,
url: layer.protocol.url}, node);
return node;
},
"_InlineGeometry": function(layer) {
var node = this.createElementNSPlus("Layer", {attributes: {
name: this.featureType,
hidden: layer.visibility ? "0" : "1" }
});
this.writeNode("ows:Title", layer.name, node);
this.writeNode("InlineGeometry", layer, node);
return node;
},
"_GML": function(layer) {
var node = this.createElementNSPlus("Layer");
this.writeNode("ows:Title", layer.name, node);
this.writeNode("Server", {service:
OpenLayers.Format.Context.serviceTypes.GML,
url: layer.protocol.url, version:
layer.protocol.format.version}, node);
return node;
},
"_KML": function(layer) {
var node = this.createElementNSPlus("Layer");
this.writeNode("ows:Title", layer.name, node);
this.writeNode("Server", {service:
OpenLayers.Format.Context.serviceTypes.KML,
version: layer.protocol.format.version, url:
layer.protocol.url}, node);
return node;
}
},
"gml": OpenLayers.Util.applyDefaults({
"boundedBy": function(bounds) {
var node = this.createElementNSPlus("gml:boundedBy");
this.writeNode("gml:Box", bounds, node);
return node;
}
}, OpenLayers.Format.GML.v2.prototype.writers.gml),
"ows": OpenLayers.Format.OWSCommon.v1_0_0.prototype.writers.ows,
"sld": OpenLayers.Format.SLD.v1_0_0.prototype.writers.sld,
"feature": OpenLayers.Format.GML.v2.prototype.writers.feature
},
CLASS_NAME: "OpenLayers.Format.OWSContext.v0_3_1"
});
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