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1 package org.jbpm.graph.node;
2
3 import org.jbpm.graph.def.*;
4
5 public class ProcessFactory {
6
7 public static ProcessDefinition createProcessDefinition(String  [] nodes, String [] transitions) {
8 ProcessDefinition pd = new ProcessDefinition();
9 addNodesAndTransitions(pd, nodes, transitions);
10 return pd;
11 }
12
13 public static void addNodesAndTransitions(ProcessDefinition pd, String [] nodes, String [] transitions) {
14 for ( int i = 0; i < nodes.length; i++ ) {
15 pd.addNode( createNode( nodes[i] ) );
16 }
17
18 for ( int i = 0; i < transitions.length; i++ ) {
19 String [] parsedTransition = cutTransitionText( transitions[i] );
20 Node from = pd.getNode( parsedTransition[0] );
21 Node to = pd.getNode( parsedTransition[2] );
22 Transition t = new Transition( parsedTransition[1] );
23 from.addLeavingTransition(t);
24 to.addArrivingTransition(t);
25 }
26 }
27
28 public static String getTypeName(Node node) {
29 if (node==null) return null;
30 return NodeTypes.getNodeName(node.getClass());
31 }
32
33
36 public static Node createNode(String text) {
37 Node node = null;
38
39 String typeName = null;
40 String name = null;
41
42 text = text.trim();
43 int spaceIndex = text.indexOf(' ');
44 if (spaceIndex!=-1) {
45 typeName = text.substring(0, spaceIndex);
46 name = text.substring(spaceIndex + 1);
47 } else {
48 typeName = text;
49 name = null;
50 }
51
52 Class nodeType = NodeTypes.getNodeType(typeName);
53 if ( nodeType==null ) throw new IllegalArgumentException ("unknown node type name '" + typeName + "'");
54 try {
55 node = (Node) nodeType.newInstance();
56 node.setName(name);
57 } catch (Exception e) {
58 throw new RuntimeException ("couldn't instantiate nodehandler for type '" + typeName + "'");
59 }
60 return node;
61 }
62
63 public static String [] cutTransitionText(String transitionText) {
64 String [] parts = new String [3];
65 if ( transitionText == null ) {
66 throw new NullPointerException ( "transitionText is null" );
67 }
68 int start = transitionText.indexOf( "--" );
69 if ( start == -1 ) {
70 throw new IllegalArgumentException ( "incorrect transition format exception : nodefrom --transitionname--> nodeto" );
71 }
72 parts[0] = transitionText.substring(0,start).trim();
73
74 int end = transitionText.indexOf( "-->", start );
75 if ( start < end ) {
76 parts[1] = transitionText.substring(start+2,end).trim();
77 } else {
78 parts[1] = null;
79 }
80 parts[2] = transitionText.substring(end+3).trim();
81 return parts;
82 }
83 }
84 |
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