package org.drools.jpdl.instance.node;
import java.util.Collection;
import java.util.Map;
import org.drools.jpdl.core.node.Fork;
import org.drools.runtime.process.NodeInstance;
import org.jbpm.JbpmException;
import org.jbpm.graph.action.Script;
public class ForkInstance extends JpdlNodeInstance {
private static final long serialVersionUID = 1L;
public Fork getFork() {
return (Fork) getNode();
}
public void execute(NodeInstance from, String type) {
Collection<String> transitionNames = null;
Script script = getFork().getScript();
if (script == null) {
transitionNames = getNode().getOutgoingConnections().keySet();
} else {
Map<String, Object> outputMap = null;
try {
outputMap = script.eval(new JpdlExecutionContext());
} catch (Exception e) {
this.raiseException(e);
}
if (outputMap.size() == 1) {
Object result = outputMap.values().iterator().next();
if (result instanceof Collection) {
transitionNames = (Collection<String>) result;
}
}
if (transitionNames == null) {
throw new JbpmException(
"script for fork '" + getNode().getName() +
"' should produce one collection (in one writable variable): " +
transitionNames);
}
}
for (String transitionName: transitionNames) {
leave(transitionName);
}
}
}