package org.jbpm.compiler.xml.processes;
import java.util.HashSet;
import org.drools.process.core.datatype.DataType;
import org.drools.xml.BaseAbstractHandler;
import org.drools.xml.ExtensibleXmlParser;
import org.drools.xml.Handler;
import org.jbpm.process.core.ValueObject;
import org.w3c.dom.Element;
import org.w3c.dom.Text;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
public class ValueHandler extends BaseAbstractHandler implements Handler {
public ValueHandler() {
if ( (this.validParents == null) && (this.validPeers == null) ) {
this.validParents = new HashSet<Class<?>>();
this.validParents.add( ValueObject.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();
ValueObject valueObject = (ValueObject) parser.getParent();
String text = ((Text)element.getChildNodes().item( 0 )).getWholeText();
if (text != null) {
text.trim();
if ("".equals(text)) {
text = null;
}
}
Object value = restoreValue(text, valueObject.getType(), parser);
valueObject.setValue(value);
return null;
}
private Object restoreValue(String text, DataType dataType, ExtensibleXmlParser parser) throws SAXException {
if (text == null || "".equals(text)) {
return null;
}
if (dataType == null) {
throw new SAXParseException(
"Null datatype", parser.getLocator());
}
return dataType.readValue(text);
}
public Class<?> generateNodeFor() {
return null;
}
}