Author: koen.aers(a)jboss.com Date: 2008-11-12 07:45:56 -0500 (Wed, 12 Nov 2008) New Revision: 11703 Added: trunk/jbpm/plugins/org.jboss.tools.flow.jpdl4/src/org/jboss/tools/flow/jpdl4/editor/JpdlDeserializer.java Log: add JpdlDeserializer, can deserialize start nodes and constraints Added: trunk/jbpm/plugins/org.jboss.tools.flow.jpdl4/src/org/jboss/tools/flow/jpdl4/editor/JpdlDeserializer.java =================================================================== --- trunk/jbpm/plugins/org.jboss.tools.flow.jpdl4/src/org/jboss/tools/flow/jpdl4/editor/JpdlDeserializer.java (rev 0) +++ trunk/jbpm/plugins/org.jboss.tools.flow.jpdl4/src/org/jboss/tools/flow/jpdl4/editor/JpdlDeserializer.java 2008-11-12 12:45:56 UTC (rev 11703) @@ -0,0 +1,107 @@ +package org.jboss.tools.flow.jpdl4.editor; + +import java.io.InputStream; + +import javax.xml.parsers.DocumentBuilderFactory; + +import org.eclipse.draw2d.geometry.Rectangle; +import org.jboss.tools.flow.common.model.Flow; +import org.jboss.tools.flow.common.registry.ElementRegistry; +import org.jboss.tools.flow.common.wrapper.FlowWrapper; +import org.jboss.tools.flow.common.wrapper.NodeWrapper; +import org.jboss.tools.flow.common.wrapper.Wrapper; +import org.jboss.tools.flow.jpdl4.Logger; +import org.w3c.dom.Document; +import org.w3c.dom.Element; +import org.w3c.dom.Node; +import org.w3c.dom.NodeList; + +public class JpdlDeserializer { + + private static DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance(); + + public static Wrapper deserialize(InputStream is) { + Wrapper result = null; + try { + Document document = documentBuilderFactory.newDocumentBuilder().parse(is); + Element element = document.getDocumentElement(); + result = createFlowWrapper(element); + } catch (Exception e) { + Logger.logError("An error occurred while creating the diagram", e); + } + return result; + } + + private static Wrapper createFlowWrapper(Element element) { + FlowWrapper result = null; + if ("process".equals(element.getNodeName())) { + result = createProcessWrapper(element); + } + return result; + } + + private static FlowWrapper createProcessWrapper(Element element) { + FlowWrapper result = (FlowWrapper)ElementRegistry.createWrapper("org.jboss.tools.flow.jpdl4.process"); + if (result != null) { + addName(result, element); + addChildren(result, element); + } + return result; + } + + private static void addName(Wrapper wrapper, Element element) { + String name = element.getAttribute("name"); + if (name == null) return; + if (wrapper instanceof FlowWrapper) { + ((Flow)((FlowWrapper)wrapper).getElement()).setName(name); + } else if (wrapper instanceof NodeWrapper){ + ((NodeWrapper)wrapper).setName(name); + } + } + + private static void addChildren(FlowWrapper wrapper, Element element) { + NodeList nodeList = element.getChildNodes(); + for (int i = 0; i < nodeList.getLength(); i++) { + Node child = nodeList.item(i); + if ("start-state".equals(child.getNodeName())) { + wrapper.addElement(createStartStateWrapper((Element)child)); + } + } + } + + private static NodeWrapper createStartStateWrapper(Element element) { + NodeWrapper result = (NodeWrapper)ElementRegistry.createWrapper("org.jboss.tools.flow.jpdl4.startState"); + if (result != null) { + addName(result, element); + addLocation(result, element); + } + return result; + } + + private static void addLocation(NodeWrapper wrapper, Element element) { + NodeList nodelist = element.getElementsByTagName("location"); + Rectangle constraint = new Rectangle(0, 0, 80, 40); + if (nodelist.getLength() >= 1) { + Element location = (Element)nodelist.item(0); + constraint.x = convertAttributeToInt(location, "x"); + constraint.y = convertAttributeToInt(location, "y"); + constraint.height = convertAttributeToInt(location, "h"); + constraint.width = convertAttributeToInt(location, "w"); + } + wrapper.setConstraint(constraint); + } + + private static int convertAttributeToInt(Element element, String attributeName) { + int result = 0; + String str = element.getAttribute(attributeName); + if (str != null) { + try { + result = new Integer(str).intValue(); + } catch (NumberFormatException e) { + Logger.logError(attributeName + " is not correctly formatted.", e); + } + } + return result; + } + +}