com.greglturnquist.springdatarest.HoppingRightAlong.java Source code

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Here is the source code for com.greglturnquist.springdatarest.HoppingRightAlong.java

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/*
 * Copyright 2015 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 com.greglturnquist.springdatarest;

import static org.springframework.hateoas.client.Hop.*;

import java.net.URI;
import java.net.URISyntaxException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.springframework.core.ParameterizedTypeReference;
import org.springframework.hateoas.MediaTypes;
import org.springframework.hateoas.Resource;
import org.springframework.hateoas.client.Traverson;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import com.greglturnquist.springdatarest.jpa.Book;
import com.greglturnquist.springdatarest.mongodb.Album;

/**
 * @author Greg Turnquist
 */
@Controller
public class HoppingRightAlong {

    private static final Logger log = LoggerFactory.getLogger(HoppingRightAlong.class);

    private final ParameterizedTypeReference<Resource<Album>> albumType = new ParameterizedTypeReference<Resource<Album>>() {
    };
    private final ParameterizedTypeReference<Resource<Book>> bookType = new ParameterizedTypeReference<Resource<Book>>() {
    };
    private final Traverson traverson;

    public HoppingRightAlong() throws URISyntaxException {
        traverson = new Traverson(new URI("http://localhost:8080/api/"), MediaTypes.HAL_JSON);
    }

    @RequestMapping(method = RequestMethod.GET, value = "/traverson/book/{isbn}")
    public @ResponseBody Resource<Book> hopToBook(@PathVariable String isbn) throws URISyntaxException {

        Resource<Book> book = traverson.follow("books", "search")
                .follow(rel("findByIsbn").withParameter("isbn", isbn)).toObject(bookType);

        log.info(book.getContent().toString());

        return book;
    }

    @RequestMapping(method = RequestMethod.GET, value = "/traverson/album/{isbn}")
    public @ResponseBody Resource<Album> hopToAlbum(@PathVariable String isbn) throws URISyntaxException {

        Resource<Album> album = traverson.follow("albums", "search")
                .follow(rel("findByIsbn").withParameter("isbn", isbn)).toObject(albumType);

        log.info(album.getContent().toString());

        return album;
    }
}