hi,
i am trying to show the graph of the current task in the process instance that
i pass by the taskInstanceId parameter.
today i can see the general graph of the process , not of the
instance of the process .
the error in on :
gpdBytes = fileDefinition.getBytes("gpd.xml");
because the fileDefinition comes out null.
should i insert a file definition to the processdefinition.xml ?
and if so - how ?
| final long serialVersionUID = 1L;
| long taskInstanceId = -1;
| long tokenInstanceId = -1;
|
| byte[] gpdBytes = null;
| byte[] imageBytes = null;
| Token currentToken = null;
| ProcessDefinition processDefinition = null;
|
| String currentTokenColor = "red";
| String childTokenColor = "blue";
| String tokenNameColor = "blue";
|
| ProcessImageJbpm PIJ = new ProcessImageJbpm();
|
| String tempInsId = DBDate.nullstring(request
| .getParameter("TaskInstanceId"));
|
| if (tempInsId.equals(""))
| tempInsId = "0";
|
| long TaskInstanceId = Long.parseLong(tempInsId);
|
| try {
|
| JbpmConfiguration jbpmConfiguration =
JbpmConfiguration.getInstance();
| JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();
|
| TaskInstance taskInstance =
jbpmContext.getTaskMgmtSession().loadTaskInstance(TaskInstanceId);
|
| currentToken = taskInstance.getToken();
|
| processDefinition =
currentToken.getProcessInstance().getProcessDefinition();
|
| PIJ.setCurrentToken(currentToken);
|
|
| FileDefinition fileDefinition =
processDefinition.getFileDefinition();
| if(fileDefinition!=null)
| {
| gpdBytes = fileDefinition.getBytes("gpd.xml");
| imageBytes =
fileDefinition.getBytes("processimage.jpg");
|
| if (gpdBytes != null && imageBytes != null) {
| int borderWidth = 4;
| Element rootDiagramElement =
DocumentHelper.parseText(
| new String(gpdBytes)).getRootElement();
| int[] boxConstraint;
| int[] imageDimension = PIJ
| .extractImageDimension(rootDiagramElement);
| String imageLink = "processimage?definitionId="
| + processDefinition.getId();
|
| if (tokenInstanceId > 0) {
|
| List allTokens = new ArrayList();
| allTokens = PIJ.walkTokens(currentToken, allTokens);
|
| out.println("<div style='position:relative;
background-image:url("
| + imageLink
| + "); width: "
| + imageDimension[0]
| + "px; height: "
| + imageDimension[1] + "px;'>");
|
| for (int i = 0; i < allTokens.size(); i++) {
| Token token = (Token) allTokens.get(i);
|
| //check how many tokens are on teh same level
(= having the same parent)
| int offset = i;
| if (i > 0) {
| while (offset > 0&& ((Token)
allTokens.get(offset - 1)).getParent().equals(token.getParent())) {
| offset--;
| }
| }
| boxConstraint =
PIJ.extractBoxConstraint(rootDiagramElement, token);
|
| //Adjust for borders
| boxConstraint[2] -= borderWidth * 2;
| boxConstraint[3] -= borderWidth * 2;
|
| out.println("<div style='position:absolute;
left: "
| + boxConstraint[0] + "px; top: "
| + boxConstraint[1] + "px; ");
|
| if (i == (allTokens.size() - 1)) {
| out.println("border: " +
currentTokenColor);
| } else {
| out.println("border: " +
childTokenColor);
| }
|
| out.println(" " + borderWidth + "px groove; "
| + "width: " + boxConstraint[2]
| + "px; height: " + boxConstraint[3]
| + "px;'>");
|
| if (token.getName() != null) {
| out.println("<span style='color:"
| + tokenNameColor
| +
";font-style:italic;position:absolute;left:"
| + (boxConstraint[2] + 10)
| + "px;top:"
| + ((i - offset) * 20)
| + ";'> " + token.getName()
| + "</span>");
| }
|
| out.println("</div>");
| }
| out.println("</div>");
| } else {
| boxConstraint =
PIJ.extractBoxConstraint(rootDiagramElement);
|
| out.println("<table border=0 cellspacing=0
cellpadding=0 width="
| + imageDimension[0]
| + " height="
| + imageDimension[1] + ">");
| out.println(" <tr>");
| out.println(" <td width=" + imageDimension[0]
| + " height=" + imageDimension[1]
| + " style=\"background-image:url(" +
imageLink
| + ")\" valign=top>");
| out.println(" <table border=0 cellspacing=0
cellpadding=0>");
| out.println(" <tr>");
| out.println(" <td width="
| + (boxConstraint[0] - borderWidth)
| + " height="
| + (boxConstraint[1] - borderWidth)
| + "
style=\"background-color:transparent;\"></td>");
| out.println(" </tr>");
| out.println(" <tr>");
| out.println(" <td
style=\"background-color:transparent;\"></td>");
| out.println(" <td style=\"border-color:"
| + currentTokenColor
| + "; border-width:"
| + borderWidth
| + "px; border-style:groove;
background-color:transparent;\" width="
| + boxConstraint[2]
| + " height="
| + (boxConstraint[3] + (2 * borderWidth))
| + "> </td>");
| out.println(" </tr>");
| out.println(" </table>");
| out.println(" </td>");
| out.println(" </tr>");
| out.println("</table>");
| }
| out.flush();
| }
| }
| }
| catch (IOException e) {
| e.printStackTrace();
| //throw new JspException("table couldn't be displayed", e);
| }
| catch (DocumentException e)
| {
| e.printStackTrace();
| }
| //throw new JspException("table couldn't be displayed", e);
| catch (Exception e) {
| e.printStackTrace();
| }
|
| taskInstanceId = -1;
| gpdBytes = null;
| imageBytes = null;
| currentToken = null;
|
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