/**
* Copyright (C) 2012-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ninja.template;
import java.util.ArrayList;
import java.util.List;
import ninja.Router;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import freemarker.template.SimpleNumber;
import freemarker.template.SimpleScalar;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;
@Singleton
public class TemplateEngineFreemarkerReverseRouteHelper {
final Router router;
@Inject
public TemplateEngineFreemarkerReverseRouteHelper(Router router) {
this.router = router;
}
public TemplateModel computeReverseRoute(List args) throws TemplateModelException {
if (args.size() < 2) {
throw new TemplateModelException(
"Please specify at least classname and controller (2 parameters).");
} else {
List<String> strings = new ArrayList<>(args.size());
for (Object o : args) {
// We currently allow only numbers and strings as arguments
if (o instanceof String) {
strings.add((String) o);
} if (o instanceof SimpleScalar) {
strings.add(((SimpleScalar) o).getAsString());
} else if (o instanceof SimpleNumber) {
strings.add(((SimpleNumber) o).toString());
}
}
try {
Class<?> clazz = Class.forName(strings.get(0));
Object [] parameterMap = strings.subList(2, strings.size()).toArray();
String reverseRoute = router.getReverseRoute(
clazz,
strings.get(1),
parameterMap);
return new SimpleScalar(reverseRoute);
} catch (ClassNotFoundException ex) {
throw new TemplateModelException("Error. Cannot find class for String: " + strings.get(0));
}
}
}
}