eu.planets_project.tb.gui.backing.UploadManager.java Source code

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Here is the source code for eu.planets_project.tb.gui.backing.UploadManager.java

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/*******************************************************************************
 * Copyright (c) 2007, 2010 The Planets Project Partners.
 *
 * All rights reserved. This program and the accompanying 
 * materials are made available under the terms of the 
 * Apache License, Version 2.0 which accompanies 
 * this distribution, and is available at 
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 *******************************************************************************/
/**
 * 
 */
package eu.planets_project.tb.gui.backing;

import java.io.File;
import java.io.FileInputStream;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import eu.planets_project.tb.gui.util.JSFUtil;
import eu.planets_project.tb.impl.serialization.ExperimentRecords;

/**
 * @author <a href="mailto:Andrew.Jackson@bl.uk">Andy Jackson</a>
 *
 */
public class UploadManager {
    private static Log log = LogFactory.getLog(UploadManager.class);

    /**
     * Triggers the page's file upload element, takes the selected data and 
     * transfers it into the Testbed's file repository. The reference to this file
     * is layed into the system's application map.
     * @return: Returns an instance of the FileUploadBean (e.g. for additional operations as .getEntryName, etc.)
     * if the operation was successful or null if an error occured
     */
    public static FileUploadBean uploadFile(boolean keep) {
        FileUploadBean file_upload = getCurrentFileUploadBean();
        try {
            //trigger the upload command
            String result = file_upload.upload(keep);
            log.info("Got result: " + result);

            if (!result.equals("success-upload")) {
                return null;
            }
        } catch (Exception e) {
            //In this case an error occured ("error-upload"): just reload the page without adding any information
            log.error("error uploading file to Testbed's input folder: " + e.toString());
            e.printStackTrace();
            return null;
        }

        return file_upload;
    }

    /**
     * Helper to fetch the FileUploadBean from the request
     * @return
     */
    public static FileUploadBean getCurrentFileUploadBean() {
        return (FileUploadBean) JSFUtil.getManagedObject("FileUploadBean");
    }

    /**
     * Helper to upload an experiment from a file and import it.
     * 
     * This checks the version number of the uploaded file and modifies the import if necessary.
     * 
     * @param uploaded The File containing the serialised experiment.
     * @return "success" if all goes well.
     */
    public String importExperiment(File uploaded) {
        try {
            ExperimentRecords er = ExperimentRecords.readFromInputStream(new FileInputStream(uploaded));
            er.storeInDatabase();
        } catch (Exception e) {
            e.printStackTrace();
            return "import_failed";
        }
        return "my_experiments";
    }

}