com.hillert.botanic.controller.UploadController.java Source code

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Here is the source code for com.hillert.botanic.controller.UploadController.java

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/*
 * Copyright 2014 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.hillert.botanic.controller;

import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

import com.hillert.botanic.dao.ImageRepository;
import com.hillert.botanic.dao.PlantRepository;
import com.hillert.botanic.model.Image;
import com.hillert.botanic.model.Plant;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

/**
 * Explicit controller for uploading Plant images.
 *
 * @author Gunnar Hillert
 * @since 1.0
 *
 */
@RestController
@RequestMapping("/upload/plants/{plantId}")
public class UploadController {

    private static final Logger LOGGER = LoggerFactory.getLogger(UploadController.class);

    @Autowired
    private PlantRepository plantRepository;

    @Autowired
    private ImageRepository imageRepository;

    @RequestMapping(method = RequestMethod.GET)
    public String provideUploadInfo(@PathVariable("plantId") Long plantId, HttpServletRequest request) {
        LOGGER.info(request.getSession().getId());
        return String.format("You can upload a file for plant with id '%s' by posting to this same URL.", plantId);
    }

    /**
     * Handles image file uplods. Images are persistence to the database using
     * {@link ImageRepository}.
     *
     * @param file Must not be null
     * @param plantId Must not be null
     * @return The saved {@link Image} or {@code NULL} in case of a problem.
     */
    @RequestMapping(method = RequestMethod.POST)
    public Image handleFileUpload(@RequestParam("file") MultipartFile file, @PathVariable("plantId") Long plantId) {

        if (file.isEmpty()) {
            return null;
        }

        byte[] bytes;

        try {
            bytes = file.getBytes();
        } catch (IOException e) {
            throw new IllegalStateException("Error uploading file.", e);
        }

        Plant plant = plantRepository.findOne(plantId);

        if (plant == null) {
            throw new IllegalStateException(String.format("Plant with id '%s' not found.", plantId));
        }

        Image image = new Image();
        image.setImage(bytes);
        image.setPlant(plant);
        image.setName(file.getOriginalFilename());
        Image savedImage = imageRepository.save(image);

        Image imageToReturn = new Image();
        imageToReturn.setId(savedImage.getId());
        imageToReturn.setImage(savedImage.getImage());
        imageToReturn.setName(savedImage.getName());

        return imageToReturn;
    }
}