+ },
+
+ registerExtension: function(extension) {
+ //debugger;
+ var doc = this,
+ existingPropertyName = _.values(this);
+
+ [
+ {source: extension.document, target: doc},
+ {source: extension.documentNode, target: [doc.ElementNodeFactory.prototype, doc.TextNodeFactory.prototype]},
+
+ ].forEach(function(x) {
+ if(x.source && x.source.methods) {
+ existingPropertyName = _.values(x.target)
+ _.pairs(x.source.methods).forEach(function(pair) {
+ var methodName = pair[0],
+ method = pair[1],
+ targets = _.isArray(x.target) ? x.target : [x.target];
+ if(_.contains(existingPropertyName, methodName)) {
+ throw new Error('Cannot extend XXX with method name {methodName}. Name already exists.'.replace('{methodName}', methodName));
+ }
+ targets.forEach(function(target) {
+ target[methodName] = method;
+ });
+
+ });
+ }
+ });
+
+
+ var getTrans = function(desc, methodName) {
+ if(typeof desc === 'function') {
+ desc = {impl: desc};
+ }
+ if(!desc.impl) {
+ throw new Error('Got transformation description without implementation.')
+ }
+ desc.name = desc.name || methodName;
+ return desc;
+ };
+
+ if(extension.document && extension.document.transformations) {
+ _.pairs(extension.document.transformations).forEach(function(pair) {
+ var transformation = getTrans(pair[1], pair[0]);
+ doc.transformations.register(transformations.createContextTransformation(transformation));
+ });
+ }
+
+ if(extension.documentNode && extension.documentNode.transformations) {
+ _.pairs(extension.documentNode.transformations).forEach(function(pair) {
+ var transformation = getTrans(pair[1], pair[0]);
+
+ doc.ElementNodeFactory.prototype.transformations.register(transformations.createContextTransformation(transformation));
+ doc.TextNodeFactory.prototype.transformations.register(transformations.createContextTransformation(transformation));
+ });
+ }
+
+ _.pairs(extension.wlxmlClass).forEach(function(pair) {
+ var className = pair[0],
+ classExtension = pair[1],
+ thisClassMethods = (doc.classMethods[className] = doc.classMethods[className] || {}),
+ thisClassTransformations = (doc.classTransformations[className] = doc.classTransformations[className] || new transformations.TransformationStorage());
+
+ _.extend(thisClassMethods, classExtension.methods || {}); //@ warning/throw on override?
+
+
+ _.pairs(classExtension.transformations || {}).forEach(function(pair) {
+ var transformation = getTrans(pair[1], pair[0]);
+ thisClassTransformations.register(transformations.createContextTransformation(transformation));
+ });
+ });
+