/**
* Copyright 2010 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.
*/
package org.jbpm.bpmn2.xml;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import org.drools.xml.BaseAbstractHandler;
import org.drools.xml.ExtensibleXmlParser;
import org.drools.xml.Handler;
import org.jbpm.bpmn2.core.Association;
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.CompositeNode;
import org.w3c.dom.Element;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
public class SequenceFlowHandler extends BaseAbstractHandler implements Handler {
public SequenceFlowHandler() {
initValidParents();
initValidPeers();
this.allowNesting = false;
}
protected void initValidParents() {
this.validParents = new HashSet<Class<?>>();
this.validParents.add(NodeContainer.class);
}
protected void initValidPeers() {
this.validPeers = new HashSet<Class<?>>();
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);
}
@SuppressWarnings("unchecked")
public Object start(final String uri, final String localName,
final Attributes attrs, final ExtensibleXmlParser parser)
throws SAXException {
parser.startElementBuilder(localName, attrs);
final String id = attrs.getValue("id");
final String sourceRef = attrs.getValue("sourceRef");
final String targetRef = attrs.getValue("targetRef");
final String bendpoints = attrs.getValue("g:bendpoints");
final String name = attrs.getValue("name");
final String priority = attrs.getValue("http://www.jboss.org/drools", "priority");
NodeContainer nodeContainer = (NodeContainer) parser.getParent();
List<SequenceFlow> connections = null;
if (nodeContainer instanceof RuleFlowProcess) {
connections = (List<SequenceFlow>)
((RuleFlowProcess) nodeContainer).getMetaData(ProcessHandler.CONNECTIONS);
if (connections == null) {
connections = new ArrayList<SequenceFlow>();
((RuleFlowProcess) nodeContainer).setMetaData(ProcessHandler.CONNECTIONS, connections);
}
} else if (nodeContainer instanceof CompositeNode) {
connections = (List<SequenceFlow>)
((CompositeNode) nodeContainer).getMetaData(ProcessHandler.CONNECTIONS);
if (connections == null) {
connections = new ArrayList<SequenceFlow>();
((CompositeNode) nodeContainer).setMetaData(ProcessHandler.CONNECTIONS, connections);
}
}
SequenceFlow connection = new SequenceFlow(id, sourceRef, targetRef);
connection.setBendpoints(bendpoints);
connection.setName(name);
if (priority != null) {
connection.setPriority(Integer.parseInt(priority));
}
connections.add(connection);
return connection;
}
public Object end(final String uri, final String localName,
final ExtensibleXmlParser parser) throws SAXException {
final Element element = parser.endElementBuilder();
SequenceFlow sequenceFlow = (SequenceFlow) parser.getCurrent();
org.w3c.dom.Node xmlNode = element.getFirstChild();
while (xmlNode != null) {
String nodeName = xmlNode.getNodeName();
if ("conditionExpression".equals(nodeName)) {
String expression = xmlNode.getTextContent();
org.w3c.dom.Node languageNode = xmlNode.getAttributes().getNamedItem("language");
if (languageNode != null) {
String language = languageNode.getNodeValue();
if (XmlBPMNProcessDumper.JAVA_LANGUAGE.equals(language)) {
sequenceFlow.setLanguage("java");
} else if (XmlBPMNProcessDumper.RULE_LANGUAGE.equals(language)) {
sequenceFlow.setType("rule");
} else if (XmlBPMNProcessDumper.XPATH_LANGUAGE.equals(language)) {
sequenceFlow.setLanguage("XPath");
} else {
throw new IllegalArgumentException("Unknown language " + language);
}
}
sequenceFlow.setExpression(expression);
}
xmlNode = xmlNode.getNextSibling();
}
return sequenceFlow;
}
public Class<?> generateNodeFor() {
return SequenceFlow.class;
}
}