/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jbpm.graph.node;
import org.jbpm.JbpmException;
import org.jbpm.graph.def.Node;
import org.jbpm.graph.def.ProcessDefinition;
import org.jbpm.graph.def.Transition;
public class ProcessFactory {
public static ProcessDefinition createProcessDefinition(String[] nodes, String[] transitions) {
ProcessDefinition pd = new ProcessDefinition();
addNodesAndTransitions(pd, nodes, transitions);
return pd;
}
public static void addNodesAndTransitions(ProcessDefinition pd, String[] nodes, String[] transitions) {
for ( int i = 0; i < nodes.length; i++ ) {
pd.addNode( createNode( nodes[i] ) );
}
for ( int i = 0; i < transitions.length; i++ ) {
String[] parsedTransition = cutTransitionText( transitions[i] );
Node from = pd.getNode( parsedTransition[0] );
Node to = pd.getNode( parsedTransition[2] );
Transition t = new Transition( parsedTransition[1] );
from.addLeavingTransition(t);
to.addArrivingTransition(t);
}
}
public static String getTypeName(Node node) {
if (node==null) return null;
return NodeTypes.getNodeName(node.getClass());
}
/**
* @throws JbpmException if text is null.
*/
public static Node createNode(String text) {
if (text==null) throw new JbpmException("text is null");
Node node = null;
String typeName;
String name;
text = text.trim();
int spaceIndex = text.indexOf(' ');
if (spaceIndex!=-1) {
typeName = text.substring(0, spaceIndex);
name = text.substring(spaceIndex + 1);
} else {
typeName = text;
name = null;
}
Class<? extends Node> nodeType = NodeTypes.getNodeType(typeName);
if ( nodeType==null ) throw new IllegalArgumentException("unknown node type name '" + typeName + "'");
try {
node = nodeType.newInstance();
node.setName(name);
} catch (Exception e) {
throw new JbpmException("couldn't instantiate nodehandler for type '" + typeName + "'");
}
return node;
}
public static String[] cutTransitionText(String transitionText) {
String[] parts = new String[3];
if ( transitionText == null ) {
throw new JbpmException( "transitionText is null" );
}
int start = transitionText.indexOf( "--" );
if ( start == -1 ) {
throw new JbpmException( "incorrect transition format exception : nodefrom --transitionname--> nodeto" );
}
parts[0] = transitionText.substring(0,start).trim();
int end = transitionText.indexOf( "-->", start );
if ( start < end ) {
parts[1] = transitionText.substring(start+2,end).trim();
} else {
parts[1] = null;
}
parts[2] = transitionText.substring(end+3).trim();
return parts;
}
}