de.iai.ilcd.services.PostResourceHelper.java Source code

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Here is the source code for de.iai.ilcd.services.PostResourceHelper.java

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/*******************************************************************************
 * Copyright (c) 2011 Karlsruhe Institute of Technology (KIT) - Institute for
 * Applied Computer Science (IAI).
 * 
 * This file is part of soda4LCA - the Service-Oriented Life Cycle Data Store.
 * 
 * soda4LCA is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * soda4LCA is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with soda4LCA. If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/

package de.iai.ilcd.services;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringWriter;

import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import de.iai.ilcd.configuration.ConfigurationService;
import de.iai.ilcd.model.common.DataSetType;
import de.iai.ilcd.model.datastock.RootDataStock;
import de.iai.ilcd.xml.read.DataSetImporter;

/**
 * 
 * @author clemens.duepmeier
 */
public class PostResourceHelper {

    private static final Logger logger = LoggerFactory.getLogger(ProcessResource.class);

    public Response importByFileUpload(DataSetType type, InputStream fileInputStream, RootDataStock rds) {

        String tempFileName = ConfigurationService.INSTANCE.getUniqueUploadFileName("IMPORT", "xml");

        try { // we have to copy the uploaded file to a temporary space first; maybe later we find a better solution
            FileOutputStream fos = new FileOutputStream(tempFileName);
            IOUtils.copy(fileInputStream, fos);
            fileInputStream.close();
            fos.close();
        } catch (IOException e) {
            logger.error("Cannot save an uploaded file to temporary storage");
            logger.error("exception is: ", e);
            return Response.status(Response.Status.INTERNAL_SERVER_ERROR)
                    .entity("Cannot save uploaded file to temporary storage").build();
        }

        DataSetImporter importer = new DataSetImporter();
        StringWriter writer = new StringWriter();
        PrintWriter out = new PrintWriter(writer);

        try {
            if (importer.importFile(type, tempFileName, out, rds) == true) {
                logger.info("data set successfully imported.");
                logger.info("{}", writer.getBuffer());
                out.println("data set successfully imported.");
                out.flush();
                return Response.ok(writer.getBuffer().toString(), MediaType.TEXT_PLAIN).build();
            } else {
                logger.error("Cannot import data set");
                logger.error("output is: {}", writer.getBuffer());
                return Response.status(Response.Status.NOT_ACCEPTABLE).type(MediaType.TEXT_PLAIN)
                        .entity(writer.getBuffer().toString()).build();
            }
        } catch (Exception e) {
            logger.error("cannot import data set");
            logger.error("exception is: ", e);
            return Response.status(Response.Status.BAD_REQUEST).type(MediaType.TEXT_PLAIN)
                    .entity(writer.getBuffer().toString()).build();
        }
    }
}