Package org.jbpm.compiler.xml.processes

Source Code of org.jbpm.compiler.xml.processes.ExceptionHandlerHandler

package org.jbpm.compiler.xml.processes;

import java.util.HashSet;

import org.drools.definition.process.Process;
import org.drools.xml.BaseAbstractHandler;
import org.drools.xml.ExtensibleXmlParser;
import org.drools.xml.Handler;
import org.jbpm.process.core.ContextContainer;
import org.jbpm.process.core.context.exception.ActionExceptionHandler;
import org.jbpm.process.core.context.exception.ExceptionHandler;
import org.jbpm.process.core.context.exception.ExceptionScope;
import org.jbpm.workflow.core.DroolsAction;
import org.w3c.dom.Element;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

public class ExceptionHandlerHandler extends BaseAbstractHandler implements Handler {
 
  public ExceptionHandlerHandler() {
    if ((this.validParents == null) && (this.validPeers == null)) {
      this.validParents = new HashSet<Class<?>>();
      this.validParents.add(Process.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();
    ContextContainer contextContainer = (ContextContainer) parser.getParent();

    final String type = element.getAttribute("type");
    emptyAttributeCheck(localName, "type", type, parser);

    final String faultName = element.getAttribute("faultName");
    emptyAttributeCheck(localName, "faultName", type, parser);
   
    final String faultVariable = element.getAttribute("faultVariable");
   
    ExceptionHandler exceptionHandler = null;
    if ("action".equals(type)) {
      exceptionHandler = new ActionExceptionHandler();
      org.w3c.dom.Node xmlNode = element.getFirstChild();
          if (xmlNode instanceof Element) {
          Element actionXml = (Element) xmlNode;
          DroolsAction action = ActionNodeHandler.extractAction(actionXml);
          ((ActionExceptionHandler) exceptionHandler).setAction(action);
          }
    } else {
      throw new SAXParseException("Unknown exception handler type " + type, parser.getLocator());
    }
   
    if (faultVariable != null && faultVariable.length() > 0) {
      exceptionHandler.setFaultVariable(faultVariable);
    }
   
    ExceptionScope exceptionScope = (ExceptionScope)
      contextContainer.getDefaultContext(ExceptionScope.EXCEPTION_SCOPE);
    if (exceptionScope == null) {
      exceptionScope = new ExceptionScope();
          contextContainer.addContext(exceptionScope);
          contextContainer.setDefaultContext(exceptionScope);
    }
   
    exceptionScope.setExceptionHandler(faultName, exceptionHandler);

    return null;
  }

  public Class<?> generateNodeFor() {
    return null;
  }

}
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