simulator.scl.factory.UploadedConfigurationFactory.java Source code

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Here is the source code for simulator.scl.factory.UploadedConfigurationFactory.java

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/*******************************************************************************
 * Copyright (c) 2011 The University of York.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Louis Rose - initial API and implementation
 ******************************************************************************/
package simulator.scl.factory;

import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.eclipse.emf.ecore.resource.Resource;

import simulator.scl.ConfigPackage;
import simulator.scl.Configuration;
import simulator.util.EmfUtil;

public class UploadedConfigurationFactory implements ConfigurationFactory {

    private final HttpServletRequest request;

    public UploadedConfigurationFactory(HttpServletRequest request) {
        this.request = request;
    }

    public Configuration createConfiguration() throws IOException {
        try {
            final FileItemFactory factory = new DiskFileItemFactory();
            final ServletFileUpload upload = new ServletFileUpload(factory);

            final InputStream stream = upload.getItemIterator(request).next().openStream();

            final Resource resource = EmfUtil.createResource(ConfigPackage.eINSTANCE);
            resource.load(stream, Collections.emptyMap());

            return (Configuration) resource.getContents().get(0);

        } catch (FileUploadException e) {
            throw new IOException("Error encountered whilst uploading file", e);
        }
    }
}