Java tutorial
/** * Copyright (c) 2009, Ole Eckermann, Stefan Krumnow & Signavio GmbH * * 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. */ package com.signavio.warehouse.business.util.jpdl4; import java.io.StringWriter; import java.util.ArrayList; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Set; import org.apache.commons.lang.StringEscapeUtils; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; public class JsonToJpdl { private static JsonToJpdl instance = null; private HashMap<String, JSONObject> children; private Set<String> uniqueNames; private JSONObject processData; public static JsonToJpdl getInstance() { return instance; } public static JsonToJpdl createInstance(JSONObject process) { instance = new JsonToJpdl(process); return instance; } private JsonToJpdl(JSONObject process) { this.processData = process; uniqueNames = new HashSet<String>(); this.children = new HashMap<String, JSONObject>(); try { JSONArray processElements = process.getJSONArray("childShapes"); // Collect all children for direct access for (int i = 0; i < processElements.length(); i++) { JSONObject currentElement = processElements.getJSONObject(i); String name = currentElement.getJSONObject("properties").getString("name"); if (name.length() == 0 || uniqueNames.contains(name)) { String newName = name; String type = currentElement.getJSONObject("stencil").getString("id"); do { newName = createName(newName, type); } while (uniqueNames.contains(newName)); uniqueNames.add(newName); currentElement.getJSONObject("properties").put("name", newName); } else { uniqueNames.add(name); } this.children.put(currentElement.getString("resourceId"), currentElement); } } catch (JSONException e) { } } private String createName(String name, String type) { if (name.length() == 0) { return (type == null || type.length() == 0) ? "element_1" : type + "_1"; } else { if (name.contains("_")) { String prefix = name.substring(0, name.lastIndexOf("_")); String suffix = name.substring(name.lastIndexOf("_") + 1); try { int i = Integer.parseInt(suffix); return prefix + "_" + (i + 1); } catch (NumberFormatException e) { return name + "_1"; } } else { return name + "_1"; } } } public String transform() throws InvalidModelException { // trigger for transformation // Check if model is of type BPMN 1.2 + jBPM OR of the jbpm4 stencilsset boolean start = false; try { String ns = this.processData.getJSONObject("stencilset").getString("namespace"); start = ns.equals("http://b3mn.org/stencilset/jbpm4#"); } catch (JSONException e) { // nothing } try { JSONArray extensions = this.processData.getJSONArray("ssextensions"); for (int i = 0; i < extensions.length(); i++) { if (extensions.getString(i).equals("http://oryx-editor.org/stencilsets/extensions/jbpm#")) { start = true; } } } catch (JSONException e) { // nothing } if (start) { Process process = new Process(this.processData); return process.toJpdl(); } else { throw new InvalidModelException("Invalid model type. BPMN 1.2 with jBPM extension is required."); } } public static String transformAttribute(String name, String value) { if (value == null) return ""; if (value.equals("")) return ""; value = StringEscapeUtils.escapeXml(value); StringWriter jpdl = new StringWriter(); jpdl.write(" "); jpdl.write(name); jpdl.write("=\""); jpdl.write(value); jpdl.write("\""); return jpdl.toString(); } public static String transformRequieredAttribute(String name, String value) throws InvalidModelException { if (value == null) throw new InvalidModelException("Attribute " + name + " is missing."); value = StringEscapeUtils.escapeXml(value); StringWriter jpdl = new StringWriter(); jpdl.write(" "); jpdl.write(name); jpdl.write("=\""); jpdl.write(value); jpdl.write("\""); return jpdl.toString(); } public static String getAttribute(JSONObject node, String name) { try { return node.getJSONObject("properties").optString(name); } catch (JSONException e) { return null; } } public static Bounds getBounds(JSONObject node) { try { return new Bounds(node.getJSONObject("bounds")); } catch (JSONException e) { return null; } } public static List<Transition> getOutgoings(JSONObject node) { List<Transition> outgoings = new ArrayList<Transition>(); try { JSONArray outs = node.getJSONArray("outgoing"); for (int i = 0; i < outs.length(); i++) { String id = outs.getJSONObject(i).getString("resourceId"); JSONObject out = JsonToJpdl.getInstance().getChild(id); outgoings.add(new Transition(out)); } } catch (JSONException e) { } return outgoings; } public String getTargetName(String targetId) { JSONObject target = children.get(targetId); try { String name = target.getJSONObject("properties").getString("name"); return name; } catch (JSONException e) { return null; } } public JSONObject getChild(String childId) { return children.get(childId); } }