/*
* Copyright 2015 Petr Bouda
*
* 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 org.joyrest.extractor;
import java.util.function.BiFunction;
import org.joyrest.exception.type.RestException;
import org.joyrest.model.RoutePart;
import org.joyrest.model.http.PathParam;
public class PathParamExtractor implements BiFunction<RoutePart<?>, String, PathParam> {
/**
* Compares the route part (part which is configured) and the path part (part which is gained from the client) and tries to
* create a
* path param.
*
* <p>
* If it is just string path, so this method will return @{code null}.
* </p>
* <p>
* If it is param path, so method will find out whether is possible to cast the object or not and then can throw an
* validation exception
* </p>
*
* @param routePart configured part
* @param pathPart path from a client's call
* @return path param derived from route and incoming call or @{code null} whether the path part is
* @throws RestException is not possible to cast the param type
**/
@Override
public PathParam apply(RoutePart<?> routePart, String pathPart) {
if (routePart.getType() == RoutePart.Type.PARAM) {
return new PathParam(routePart.getValue(), pathPart);
}
return null;
}
}