WFS.js
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/* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
* See http://svn.openlayers.org/trunk/openlayers/release-license.txt
* for the full text of the license. */
/**
* Read/WRite WFS.
* @requires OpenLayers/Format/GML.js
*/
OpenLayers.Format.WFS = OpenLayers.Class.create();
OpenLayers.Format.WFS.prototype =
OpenLayers.Class.inherit( OpenLayers.Format.GML, {
layer: null,
wfsns: "http://www.opengis.net/wfs",
/*
* Create a WFS-T formatter. This requires a layer: that layer should
* have two properties: geometry_column and typename. The parser
* for this format is subclassed entirely from GML: There is a writer
* only, which uses most of the code from the GML layer, and wraps
* it in transactional elements.
* @param {Object} options
* @param OpenLayers.Layer layer
*/
initialize: function(options, layer) {
OpenLayers.Format.GML.prototype.initialize.apply(this, [options]);
this.layer = layer;
if (this.layer.featureNS) {
this.featureNS = this.layer.featureNS;
}
if (this.layer.options.geometry_column) {
this.geometryName = this.layer.options.geometry_column;
}
if (this.layer.options.typename) {
this.featureName = this.layer.options.typename;
}
},
/**
* write
* Takes a feature list, and generates a WFS-T Transaction
*
* @param Array
*/
write: function(features) {
var transaction = document.createElementNS('http://www.opengis.net/wfs', 'wfs:Transaction');
for (var i=0; i < features.length; i++) {
switch (features[i].state) {
case OpenLayers.State.INSERT:
transaction.appendChild(this.insert(features[i]));
break;
case OpenLayers.State.UPDATE:
transaction.appendChild(this.update(features[i]));
break;
case OpenLayers.State.DELETE:
transaction.appendChild(this.remove(features[i]));
break;
}
}
return transaction;
},
createFeatureXML: function(feature) {
var geometryNode = this.buildGeometryNode(feature.geometry);
var geomContainer = document.createElementNS(this.featureNS, "feature:" + this.geometryName);
geomContainer.appendChild(geometryNode);
var featureContainer = document.createElementNS(this.featureNS, "feature:" + this.featureName);
featureContainer.appendChild(geomContainer);
for(var attr in feature.attributes) {
var attrText = document.createTextNode(feature.attributes[attr]);
var nodename = attr;
if (attr.search(":") != -1) {
nodename = attr.split(":")[1];
}
var attrContainer = document.createElementNS(this.featureNS, "feature:" + nodename);
attrContainer.appendChild(attrText);
featureContainer.appendChild(attrContainer);
}
return featureContainer;
},
/**
* insert
* Takes a feature, and generates a WFS-T Transaction "Insert"
*
* @param OpenLayers.Feature.Vector
*/
insert: function(feature) {
var insertNode = document.createElementNS(this.wfsns, 'wfs:Insert');
insertNode.appendChild(this.createFeatureXML(feature));
return insertNode;
},
/**
* update
* Takes a feature, and generates a WFS-T Transaction "Update"
*
* @param OpenLayers.Feature.Vector
*/
update: function(feature) {
if (!feature.fid) { alert("Can't update a feature for which there is no FID."); }
var updateNode = document.createElementNS(this.wfsns, 'wfs:Update');
updateNode.setAttribute("typeName", this.layerName);
var propertyNode = document.createElementNS(this.wfsns, 'wfs:Property');
var nameNode = document.createElementNS('http://www.opengis.net/wfs', 'wfs:Name');
var txtNode = document.createTextNode(this.geometryName);
nameNode.appendChild(txtNode);
propertyNode.appendChild(nameNode);
var valueNode = document.createElementNS('http://www.opengis.net/wfs', 'wfs:Value');
valueNode.appendChild(this.buildGeometryNode(feature.geometry));
propertyNode.appendChild(valueNode);
updateNode.appendChild(propertyNode);
var filterNode = document.createElementNS('http://www.opengis.net/ogc', 'ogc:Filter');
var filterIdNode = document.createElementNS('http://www.opengis.net/ogc', 'ogc:FeatureId');
filterIdNode.setAttribute("fid", feature.fid);
filterNode.appendChild(filterIdNode);
updateNode.appendChild(filterNode);
return updateNode;
},
/**
* delete
* Takes a feature, and generates a WFS-T Transaction "Delete"
*
* @param OpenLayers.Feature.Vector
*/
remove: function(feature) {
if (!feature.attributes.fid) {
alert("Can't update a feature for which there is no FID.");
return false;
}
var deleteNode = document.createElementNS(this.featureNS, 'wfs:Delete');
deleteNode.setAttribute("typeName", this.layerName);
var filterNode = document.createElementNS('http://www.opengis.net/ogc', 'ogc:Filter');
var filterIdNode = document.createElementNS('http://www.opengis.net/ogc', 'ogc:FeatureId');
filterIdNode.setAttribute("fid", feature.attributes.fid);
filterNode.appendChild(filterIdNode);
deleteNode.appendChild(filterNode);
return deleteNode;
},
destroy: function() {
this.layer = null;
},
/** @final @type String */
CLASS_NAME: "OpenLayers.Format.WFS"
});