- var doc = this,
- existingPropertyNames = _.values(this);
-
- 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;
- };
-
- [
- {source: extension.document, target: doc},
- {source: extension.documentNode, target: [doc.ElementNodeFactory.prototype, doc.TextNodeFactory.prototype]},
-
- ].forEach(function(mapping) {
- if(mapping.source) {
- if(mapping.source.methods) {
- existingPropertyNames = _.values(mapping.target)
- _.pairs(mapping.source.methods).forEach(function(pair) {
- var methodName = pair[0],
- method = pair[1],
- targets = _.isArray(mapping.target) ? mapping.target : [mapping.target];
- if(_.contains(existingPropertyNames, methodName)) {
- throw new Error('Cannot extend {target} with method name {methodName}. Name already exists.'
- .replace('{target}', mapping.target)
- .replace('{methodName}', methodName)
- );
- }
- targets.forEach(function(target) {
- target.registerMethod(methodName, method)
- });
- });
- }
-
- if(mapping.source.transformations) {
- _.pairs(mapping.source.transformations).forEach(function(pair) {
- var transformation = getTrans(pair[1], pair[0]),
- targets = _.isArray(mapping.target) ? mapping.target : [mapping.target];
- targets.forEach(function(target) {
- target.registerTransformation(transformations.createContextTransformation(transformation));
- });
- });
- }
- }
- });