package org.drools.workflow.instance.node;
/*
* Copyright 2005 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import org.drools.process.core.context.variable.VariableScope;
import org.drools.process.core.event.EventTransformer;
import org.drools.process.instance.context.variable.VariableScopeInstance;
import org.drools.runtime.process.NodeInstance;
import org.drools.workflow.core.node.EventNode;
import org.drools.workflow.instance.impl.NodeInstanceImpl;
/**
* Runtime counterpart of an event node.
*
* @author <a href="mailto:kris_verlaenen@hotmail.com">Kris Verlaenen</a>
*/
public class EventNodeInstance extends NodeInstanceImpl implements EventNodeInstanceInterface {
private static final long serialVersionUID = 400L;
public void signalEvent(String type, Object event) {
String variableName = getEventNode().getVariableName();
if (variableName != null) {
VariableScopeInstance variableScopeInstance = (VariableScopeInstance)
resolveContextInstance(VariableScope.VARIABLE_SCOPE, variableName);
if (variableScopeInstance == null) {
throw new IllegalArgumentException(
"Could not find variable for event node: " + variableName);
}
EventTransformer transformer = getEventNode().getEventTransformer();
if (transformer != null) {
event = transformer.transformEvent(event);
}
variableScopeInstance.setVariable(variableName, event);
}
trigger(null, null);
}
public void internalTrigger(final NodeInstance from, String type) {
if (type != null) {
throw new IllegalArgumentException(
"An event node does not accept incoming connections!");
}
if (from != null) {
throw new IllegalArgumentException(
"An event can only be triggered by its parent!");
}
triggerCompleted();
}
public EventNode getEventNode() {
return (EventNode) getNode();
}
public void triggerCompleted() {
triggerCompleted(org.drools.workflow.core.Node.CONNECTION_DEFAULT_TYPE, true);
}
}