it.polimi.diceH2020.launcher.controller.FilesController.java Source code

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Here is the source code for it.polimi.diceH2020.launcher.controller.FilesController.java

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/*
Copyright 2016 Jacopo Rigoli
Copyright 2016 Michele Ciavotta
    
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 it.polimi.diceH2020.launcher.controller;

import it.polimi.diceH2020.SPACE4Cloud.shared.inputDataMultiProvider.InstanceDataMultiProvider;
import it.polimi.diceH2020.SPACE4Cloud.shared.settings.Scenarios;
import it.polimi.diceH2020.launcher.service.Validator;
import it.polimi.diceH2020.launcher.utility.FileUtility;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.*;
import java.util.stream.Collectors;

@Controller
@RequestMapping("/files")
public class FilesController {

    @Autowired
    FileUtility fileUtility;
    @Autowired
    Validator validator;

    @RequestMapping(value = "/upload", method = RequestMethod.GET)
    public @ResponseBody String hello() {
        return "done";
    }

    @RequestMapping(value = "/upload", method = RequestMethod.POST)
    public String multipleSave(@RequestParam("file[]") MultipartFile[] files,
            @RequestParam("scenario") String useCase, Model model, RedirectAttributes redirectAttrs) {
        boolean singleInputData = false;
        Scenarios scenario = Scenarios.valueOf(useCase);
        ArrayList<String> tmpValues = new ArrayList<>();

        redirectAttrs.addAttribute("scenario", scenario);
        model.addAttribute("scenario", scenario);

        if (files == null || files.length == 0) {
            model.addAttribute("message", "Wrong files!");
            return "launchSimulation_FileUpload";
        }

        if (hasDuplicate(
                Arrays.stream(files).map(MultipartFile::getOriginalFilename).collect(Collectors.toList()))) {
            model.addAttribute("message", "Duplicated files!");
            return "launchSimulation_FileUpload";
        }

        for (int i = 0; i < files.length; i++) {
            String fileName = files[i].getOriginalFilename()
                    .substring(files[i].getOriginalFilename().lastIndexOf("/") + 1);
            File f = saveFile(files[i], fileName);
            if (f == null)
                return "error";
            if (fileName.contains(".json")) {
                Optional<InstanceDataMultiProvider> idmp = validator.readInstanceDataMultiProvider(f.toPath());
                if (idmp.isPresent()) {
                    if (idmp.get().validate()) {
                        redirectAttrs.addAttribute("instanceDataMultiProvider", f.toPath().toString());
                        continue;
                    } else {
                        model.addAttribute("message", idmp.get().getValidationError());
                        return "launchSimulation_FileUpload";
                    }
                }
                model.addAttribute("message", "You have submitted an invalid json!");
                return "launchSimulation_FileUpload";
            } else {
                if (fileName.contains(".txt")) {
                    tmpValues.add(f.toPath().toString());
                }
            }
        }

        redirectAttrs.addAttribute("pathList", tmpValues);
        if (singleInputData)
            return "redirect:/launch/simulationSetupSingleInputData";
        return "redirect:/launch/simulationSetup";
    }

    private File saveFile(MultipartFile file, String fileName) {
        try {
            byte[] bytes = file.getBytes();
            File f = fileUtility.provideFile(fileName);
            BufferedOutputStream buffStream = new BufferedOutputStream(new FileOutputStream(f));
            buffStream.write(bytes);
            buffStream.close();
            return f;
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return null;
        }
    }

    private static <T> boolean hasDuplicate(Iterable<T> all) {
        Set<T> set = new HashSet<T>();
        // Set#add returns false if the set does not change, which
        // indicates that a duplicate element has been added.
        for (T each : all)
            if (!set.add(each))
                return true;
        return false;
    }

}