[jboss-svn-commits] JBL Code SVN: r21197 - labs/jbossrules/trunk/drools-core/src/main/java/org/drools/workflow/instance/node.

[jboss-svn-commits at lists.jboss.org]

Author: KrisVerlaenen
Date: 2008-07-23 11:59:57 -0400 (Wed, 23 Jul 2008)
New Revision: 21197

Added:
   labs/jbossrules/trunk/drools-core/src/main/java/org/drools/workflow/instance/node/EventNodeInstance.java
Log:
JBRULES-1691: Event Node
 - added basic event node

Added: labs/jbossrules/trunk/drools-core/src/main/java/org/drools/workflow/instance/node/EventNodeInstance.java
===================================================================
--- labs/jbossrules/trunk/drools-core/src/main/java/org/drools/workflow/instance/node/EventNodeInstance.java	                        (rev 0)
+++ labs/jbossrules/trunk/drools-core/src/main/java/org/drools/workflow/instance/node/EventNodeInstance.java	2008-07-23 15:59:57 UTC (rev 21197)
@@ -0,0 +1,68 @@
+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.instance.context.variable.VariableScopeInstance;
+import org.drools.workflow.core.Node;
+import org.drools.workflow.core.node.EventNode;
+import org.drools.workflow.instance.NodeInstance;
+import org.drools.workflow.instance.impl.NodeInstanceImpl;
+
+/**
+ * Runtime counterpart of an event node.
+ * 
+ * @author <a href="mailto:kris_verlaenen at hotmail.com">Kris Verlaenen</a>
+ */
+public class EventNodeInstance extends NodeInstanceImpl {
+
+    private static final long serialVersionUID = 400L;
+
+    public void setEvent(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);
+    		}
+    		variableScopeInstance.setVariable(variableName, event);
+    	}
+    }
+    
+    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(Node.CONNECTION_DEFAULT_TYPE, true);
+    }
+    
+}