package org.jbpm.compiler.xml.processes;
import java.util.HashSet;
import org.drools.process.core.TypeObject;
import org.drools.process.core.datatype.DataType;
import org.drools.process.core.datatype.impl.type.ObjectDataType;
import org.drools.xml.BaseAbstractHandler;
import org.drools.xml.ExtensibleXmlParser;
import org.drools.xml.Handler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
public class TypeHandler extends BaseAbstractHandler
implements
Handler {
public TypeHandler() {
if ( (this.validParents == null) && (this.validPeers == null) ) {
this.validParents = new HashSet<Class<?>>();
this.validParents.add( TypeObject.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 );
TypeObject typeable = (TypeObject) parser.getParent();
String name = attrs.getValue("name");
emptyAttributeCheck(localName, "name", name, parser);
DataType dataType = null;
try {
dataType = (DataType) Class.forName(name).newInstance();
// TODO make this pluggable so datatypes can read in other properties as well
if (dataType instanceof ObjectDataType) {
String className = attrs.getValue("className");
if (className == null) {
className = "java.lang.Object";
}
((ObjectDataType) dataType).setClassName(className);
}
} catch (ClassNotFoundException e) {
throw new SAXParseException(
"Could not find datatype " + name, parser.getLocator());
} catch (InstantiationException e) {
throw new SAXParseException(
"Could not instantiate datatype " + name, parser.getLocator());
} catch (IllegalAccessException e) {
throw new SAXParseException(
"Could not access datatype " + name, parser.getLocator());
}
typeable.setType(dataType);
return dataType;
}
public Object end(final String uri,
final String localName,
final ExtensibleXmlParser parser) throws SAXException {
parser.endElementBuilder();
return null;
}
public Class<?> generateNodeFor() {
return DataType.class;
}
}