org.jbpm.bpmn2.xml.AssociationHandler Maven / Gradle / Ivy
/**
* Copyright 2010 Intalio 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.
*/
package org.jbpm.bpmn2.xml;
import static org.jbpm.bpmn2.xml.ProcessHandler.ASSOCIATIONS;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import org.drools.core.xml.BaseAbstractHandler;
import org.drools.core.xml.ExtensibleXmlParser;
import org.drools.core.xml.Handler;
import org.jbpm.bpmn2.core.Association;
import org.jbpm.bpmn2.core.Definitions;
import org.jbpm.bpmn2.core.Lane;
import org.jbpm.bpmn2.core.SequenceFlow;
import org.jbpm.process.core.context.variable.Variable;
import org.jbpm.ruleflow.core.RuleFlowProcess;
import org.jbpm.workflow.core.Node;
import org.jbpm.workflow.core.NodeContainer;
import org.jbpm.workflow.core.node.CompositeContextNode;
import org.jbpm.workflow.core.node.CompositeNode;
import org.kie.api.definition.process.Process;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
/**
* @author Antoine Toulme
*
*/
public class AssociationHandler extends BaseAbstractHandler implements Handler {
public AssociationHandler() {
if ((this.validParents == null) && (this.validPeers == null)) {
this.validParents = new HashSet>();
this.validParents.add(Process.class);
this.validParents.add(CompositeContextNode.class); // for SubProcesses
this.validPeers = new HashSet>();
this.validPeers.add(null);
this.validPeers.add(Lane.class);
this.validPeers.add(Variable.class);
this.validPeers.add(Node.class);
this.validPeers.add(SequenceFlow.class);
this.validPeers.add(Lane.class);
this.validPeers.add(Association.class);
this.allowNesting = false;
}
}
public Object start(final String uri, final String localName,
final Attributes attrs, final ExtensibleXmlParser parser)
throws SAXException {
parser.startElementBuilder(localName, attrs);
Association association = new Association();
association.setId(attrs.getValue("id"));
association.setSourceRef(attrs.getValue("sourceRef"));
association.setTargetRef(attrs.getValue("targetRef"));
String direction = attrs.getValue("associationDirection");
if( direction != null ) {
boolean acceptableDirection = false;
direction = direction.toLowerCase();
String [] possibleDirections = { "none", "one", "both" };
for( String acceptable : possibleDirections ) {
if( acceptable.equals(direction) ) {
acceptableDirection = true;
break;
}
}
if( ! acceptableDirection ) {
throw new IllegalArgumentException("Unknown direction '" + direction + "' used in Association " + association.getId());
}
}
association.setDirection(direction);
/**
* BPMN2 spec, p. 66:
* "At this point, BPMN provides three standard Artifacts: Associations,
* Groups, and Text Annotations.
* ...
* When an Artifact is defined it is contained within a Collaboration
* or a FlowElementsContainer (a Process or Choreography)."
*
* (In other words: associations must be defined within a process, not outside)
*/
List associations = null;
NodeContainer nodeContainer = (NodeContainer) parser.getParent();
if( nodeContainer instanceof Process ) {
RuleFlowProcess process = (RuleFlowProcess) nodeContainer;
associations = (List) process.getMetaData(ASSOCIATIONS);
if (associations == null) {
associations = new ArrayList();
process.setMetaData(ASSOCIATIONS, associations);
}
} else if( nodeContainer instanceof CompositeNode ) {
CompositeContextNode compositeNode = (CompositeContextNode) nodeContainer;
associations = (List) compositeNode.getMetaData(ASSOCIATIONS);
if (associations == null) {
associations = new ArrayList();
compositeNode.setMetaData(ProcessHandler.ASSOCIATIONS, associations);
}
}
associations.add(association);
return association;
}
public Object end(final String uri, final String localName,
final ExtensibleXmlParser parser) throws SAXException {
parser.endElementBuilder();
return parser.getCurrent();
}
public Class generateNodeFor() {
return Association.class;
}
}