package org.jbpm.compiler.xml.processes;
import java.util.HashSet;
import org.drools.xml.BaseAbstractHandler;
import org.drools.xml.ExtensibleXmlParser;
import org.drools.xml.Handler;
import org.jbpm.workflow.core.Constraint;
import org.jbpm.workflow.core.impl.ConnectionRef;
import org.jbpm.workflow.core.impl.ConstraintImpl;
import org.jbpm.workflow.core.impl.NodeImpl;
import org.jbpm.workflow.core.node.Constrainable;
import org.w3c.dom.Element;
import org.w3c.dom.Text;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
public class ConstraintHandler extends BaseAbstractHandler implements Handler {
public ConstraintHandler() {
if ((this.validParents == null) && (this.validPeers == null)) {
this.validParents = new HashSet<Class<?>>();
this.validParents.add(Constrainable.class);
this.validPeers = new HashSet<Class<?>>();
this.validPeers.add(null);
this.allowNesting = false;
}
}
public Object start(final String uri,
final String localName,
final Attributes attrs,
final ExtensibleXmlParser parser) throws SAXException {
parser.startElementBuilder( localName,
attrs );
return null;
}
public Object end(final String uri,
final String localName,
final ExtensibleXmlParser parser) throws SAXException {
final Element element = parser.endElementBuilder();
Constrainable parent = (Constrainable) parser.getParent();
Constraint constraint = new ConstraintImpl();
final String toNodeIdString = element.getAttribute("toNodeId");
String toType = element.getAttribute("toType");
ConnectionRef connectionRef = null;
if (toNodeIdString != null && toNodeIdString.trim().length() > 0) {
int toNodeId = new Integer(toNodeIdString);
if (toType == null || toType.trim().length() == 0) {
toType = NodeImpl.CONNECTION_DEFAULT_TYPE;
}
connectionRef = new ConnectionRef(toNodeId, toType);
}
final String name = element.getAttribute("name");
constraint.setName(name);
final String priority = element.getAttribute("priority");
if (priority != null && priority.length() != 0) {
constraint.setPriority(new Integer(priority));
}
final String type = element.getAttribute("type");
constraint.setType(type);
final String dialect = element.getAttribute("dialect");
constraint.setDialect(dialect);
String text = ((Text)element.getChildNodes().item( 0 )).getWholeText();
if (text != null) {
text = text.trim();
if ("".equals(text)) {
text = null;
}
}
constraint.setConstraint(text);
parent.addConstraint(connectionRef, constraint);
return null;
}
@SuppressWarnings("unchecked")
public Class generateNodeFor() {
return Constraint.class;
}
}