Java tutorial
package org.oryxeditor.server; /** * Copyright (c) 2008 * SAP Research * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * * Portions of the code in this file have been developed by * Stefan Krumnow and Falko Menge at SAP Research Brisbane and * contributed to the Oryx project in October 2008 under the * terms of the MIT License. * * @author Stefan Krumnow * @author Falko Menge **/ import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.util.Map; import java.util.UUID; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItemIterator; import org.apache.commons.fileupload.FileItemStream; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.fileupload.util.Streams; import org.supercsv.io.CsvMapReader; import org.supercsv.prefs.CsvPreference; public class StencilSetExtensionGeneratorServlet extends HttpServlet { private static final long serialVersionUID = 1L; protected HttpServletRequest request; protected HttpServletResponse response; protected String baseUrl; protected Repository repository; /** * Request parameters are documented in * editor/test/examples/stencilset-extension-generator.xhtml * The parameter 'csvFile' is always required. * An example CSV file can be found in * editor/test/examples/design-thinking-example-data.csv * which has been exported using OpenOffice.org from * editor/test/examples/design-thinking-example-data.ods */ protected void doPost(HttpServletRequest request, HttpServletResponse response) { this.request = request; this.response = response; this.baseUrl = Repository.getBaseUrl(request); this.repository = new Repository(baseUrl); // parameters and their default values String modelNamePrefix = "Generated Model using "; String stencilSetExtensionNamePrefix = StencilSetExtensionGenerator.DEFAULT_STENCIL_SET_EXTENSION_NAME_PREFIX; String baseStencilSetPath = StencilSetExtensionGenerator.DEFAULT_BASE_STENCIL_SET_PATH; String baseStencilSet = StencilSetExtensionGenerator.DEFAULT_BASE_STENCIL_SET; String baseStencil = StencilSetExtensionGenerator.DEFAULT_BASE_STENCIL; List<String> stencilSetExtensionUrls = new ArrayList<String>(); String[] columnPropertyMapping = null; String[] csvHeader = null; List<Map<String, String>> stencilPropertyMatrix = new ArrayList<Map<String, String>>(); String modelDescription = "The initial version of this model has been created by the Stencilset Extension Generator."; String additionalERDFContentForGeneratedModel = ""; String[] modelTags = null; // Check that we have a file upload request boolean isMultipart = ServletFileUpload.isMultipartContent(request); if (isMultipart) { // Create a new file upload handler ServletFileUpload upload = new ServletFileUpload(); // Parse the request FileItemIterator iterator; try { iterator = upload.getItemIterator(request); while (iterator.hasNext()) { FileItemStream item = iterator.next(); String name = item.getFieldName(); InputStream stream = item.openStream(); if (item.isFormField()) { // ordinary form field String value = Streams.asString(stream); //System.out.println("Form field " + name + " with value " // + value + " detected."); if (name.equals("modelNamePrefix")) { modelNamePrefix = value; } else if (name.equals("stencilSetExtensionNamePrefix")) { stencilSetExtensionNamePrefix = value; } else if (name.equals("baseStencilSetPath")) { baseStencilSetPath = value; } else if (name.equals("baseStencilSet")) { baseStencilSet = value; } else if (name.equals("stencilSetExtension")) { stencilSetExtensionUrls.add(value); } else if (name.equals("baseStencil")) { baseStencil = value; } else if (name.equals("columnPropertyMapping")) { columnPropertyMapping = value.split(","); } else if (name.equals("modelDescription")) { modelDescription = value; } else if (name.equals("modelTags")) { modelTags = value.split(","); } else if (name.equals("additionalERDFContentForGeneratedModel")) { additionalERDFContentForGeneratedModel = value; } } else { // file field //System.out.println("File field " + name + " with file name " // + item.getName() + " detected."); // Process the input stream if (name.equals("csvFile")) { CsvMapReader csvFileReader = new CsvMapReader(new InputStreamReader(stream), CsvPreference.EXCEL_PREFERENCE); csvHeader = csvFileReader.getCSVHeader(true); if (columnPropertyMapping != null && columnPropertyMapping.length > 0) { csvHeader = columnPropertyMapping; } Map<String, String> row; while ((row = csvFileReader.read(csvHeader)) != null) { stencilPropertyMatrix.add(row); } } } } // generate stencil set Date creationDate = new Date(System.currentTimeMillis()); DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss.SSS"); String stencilSetExtensionName = stencilSetExtensionNamePrefix + " " + dateFormat.format(creationDate); stencilSetExtensionUrls .add(StencilSetExtensionGenerator.generateStencilSetExtension(stencilSetExtensionName, stencilPropertyMatrix, columnPropertyMapping, baseStencilSet, baseStencil)); // generate new model String modelName = modelNamePrefix + stencilSetExtensionName; String model = repository.generateERDF(UUID.randomUUID().toString(), additionalERDFContentForGeneratedModel, baseStencilSetPath, baseStencilSet, stencilSetExtensionUrls, modelName, modelDescription); String modelUrl = baseUrl + repository.saveNewModel(model, modelName, modelDescription, baseStencilSet, baseStencilSetPath); // hack for reverse proxies: modelUrl = modelUrl.substring(modelUrl.lastIndexOf("http://")); // tag model if (modelTags != null) { for (String tagName : modelTags) { repository.addTag(modelUrl, tagName.trim()); } } // redirect client to editor with that newly generated model response.setHeader("Location", modelUrl); response.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY); } catch (FileUploadException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } else { // TODO Add some error message } } protected void println(String output) { try { response.getWriter().println(output); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }