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/*
* Copyright (C) 2014-present 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 ro.pippo.pebble;
import com.mitchellbosecke.pebble.extension.Function;
import com.mitchellbosecke.pebble.template.EvaluationContext;
import com.mitchellbosecke.pebble.template.PebbleTemplate;
import ro.pippo.core.PippoRuntimeException;
import ro.pippo.core.route.ClasspathResourceHandler;
import ro.pippo.core.route.Router;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;
/**
* Base class for handling classpath resource url generation from a Pebble template.
*
* @author James Moger
*/
abstract class ClasspathResourceFunction implements Function {
final Router router;
final Class resourceHandlerClass;
final AtomicReference patternRef;
protected ClasspathResourceFunction(Router router, Class resourceHandlerClass) {
this.router = router;
this.resourceHandlerClass = resourceHandlerClass;
this.patternRef = new AtomicReference<>();
}
@Override
public List getArgumentNames() {
List names = new ArrayList<>();
names.add(ClasspathResourceHandler.PATH_PARAMETER);
return names;
}
@Override
public Object execute(Map args, PebbleTemplate self, EvaluationContext context, int lineNumber) {
if (patternRef.get() == null) {
String pattern = router.uriPatternFor(resourceHandlerClass);
if (pattern == null) {
throw new PippoRuntimeException("You must register a route for {}", resourceHandlerClass.getSimpleName());
}
patternRef.set(pattern);
}
String path = (String) args.get(ClasspathResourceHandler.PATH_PARAMETER);
Map parameters = new HashMap<>();
parameters.put(ClasspathResourceHandler.PATH_PARAMETER, path);
return router.uriFor(patternRef.get(), parameters);
}
}
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