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*
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* Lesser General Public License for more details.
*
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* License along with this software; if not, write to the Free
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*/
package org.jbpm.jpdl.patterns;
import junit.framework.TestCase;
import org.jbpm.context.def.ContextDefinition;
import org.jbpm.context.exe.ContextInstance;
import org.jbpm.graph.def.ProcessDefinition;
import org.jbpm.graph.exe.ProcessInstance;
import org.jbpm.graph.exe.Token;
/**
* http://is.tm.tue.nl/research/patterns/download/swf/pat_4.swf
*
* <p>we make a distinction in the api between process and client based
* decisions. the first tests show the situations as described in the
* pattern. after that a demonstration of client based decision is
* added.
* </p>
*
* <p>process based
* decisions makes use of a decision node. the node has a piece of
* programming logic associated that calculates the leaving transition
* name. the programming logic is executed within the calculation of
* the next state of the process instance.
* </p>
*
* <p>client based decisions allow clients to select on of the multiple
* transitions that leave the current state.
* </p>
*/
public class Wfp04ExclusiveChoiceTest extends TestCase {
static ProcessDefinition exclusiveChoiceProcessDefinition = ProcessDefinition.parseXmlString(
"<process-definition>" +
" <start-state name='start'>" +
" <transition to='a' />" +
" </start-state>" +
" <state name='a'>" +
" <transition to='xor' />" +
" </state>" +
" <decision name='xor'>" +
" <transition name='forget about it' to='d'/>" +
" <transition name='urgent' to='b'>" +
" <condition>#{scenario==1}</condition>" +
" </transition>" +
" <transition name='dont care' to='c'>" +
" <condition>#{scenario==2}</condition>" +
" </transition>" +
" </decision>" +
" <state name='b' />" +
" <state name='c' />" +
" <state name='d' />" +
"</process-definition>" );
static {
exclusiveChoiceProcessDefinition.addDefinition( new ContextDefinition() );
}
/**
* situation 1
*/
public void testExclusiveChoiceSituation1() {
ProcessDefinition pd = exclusiveChoiceProcessDefinition;
ProcessInstance pi = new ProcessInstance( pd );
ContextInstance ci = (ContextInstance) pi.getInstance( ContextInstance.class );
pi.signal();
Token root = pi.getRootToken();
assertSame( pd.getNode("a"), root.getNode() );
ci.setVariable( "scenario", new Integer(1) );
root.signal();
assertSame( pd.getNode("b"), root.getNode() );
}
/**
* situation 2
*/
public void testExclusiveChoiceSituation2() {
ProcessDefinition pd = exclusiveChoiceProcessDefinition;
ProcessInstance pi = new ProcessInstance( pd );
ContextInstance ci = (ContextInstance) pi.getInstance( ContextInstance.class );
pi.signal();
Token root = pi.getRootToken();
assertSame( pd.getNode("a"), root.getNode() );
ci.setVariable( "scenario", new Integer(2) );
root.signal();
assertSame( pd.getNode("c"), root.getNode() );
}
}