package org.jbpm.compiler.xml.processes;
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.process.core.ContextContainer;
import org.jbpm.process.core.context.variable.Variable;
import org.jbpm.process.core.context.variable.VariableScope;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
public class VariableHandler extends BaseAbstractHandler
implements
Handler {
public VariableHandler() {
if ( (this.validParents == null) && (this.validPeers == null) ) {
this.validParents = new HashSet<Class<?>>();
this.validParents.add( ContextContainer.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 );
ContextContainer contextContainer = (ContextContainer) parser.getParent();
final String name = attrs.getValue("name");
emptyAttributeCheck(localName, "name", name, parser);
VariableScope variableScope = (VariableScope)
contextContainer.getDefaultContext(VariableScope.VARIABLE_SCOPE);
Variable variable = new Variable();
if (variableScope != null) {
variable.setName(name);
List<Variable> variables = variableScope.getVariables();
if (variables == null) {
variables = new ArrayList<Variable>();
variableScope.setVariables(variables);
}
variables.add(variable);
} else {
throw new SAXParseException(
"Could not find default variable scope.", parser.getLocator());
}
return variable;
}
public Object end(final String uri,
final String localName,
final ExtensibleXmlParser parser) throws SAXException {
parser.endElementBuilder();
return null;
}
public Class<?> generateNodeFor() {
return Variable.class;
}
}