how can i show a graph of the instance that i specify ?
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;
