package org.wamblee.xmlrouter.impl; import java.util.logging.Level; import java.util.logging.Logger; import javax.xml.transform.dom.DOMSource; import org.wamblee.xml.XMLDocument; import org.wamblee.xmlrouter.common.Id; import org.wamblee.xmlrouter.config.Transformation; public class RobustTransformation implements Transformation { private static final Logger LOGGER = Logger .getLogger(RobustTransformation.class.getName()); private Id id; private Transformation transformation; public RobustTransformation(Id aId, Transformation aTransformation) { id = aId; transformation = aTransformation; } @Override public String getFromType() { try { String from = transformation.getFromType(); if (from == null) { logTypeReturnedNull("from"); return Constants.UNKNOWN_DOCUMENT_TYPE.toString(); } return from; } catch (Exception e) { logTypeThrewException("from", e); return Constants.UNKNOWN_DOCUMENT_TYPE.toString(); } } @Override public String getToType() { try { String to = transformation.getToType(); if (to == null) { logTypeReturnedNull("to"); return Constants.UNKNOWN_DOCUMENT_TYPE.toString(); } return to; } catch (Exception e) { logTypeThrewException("to", e); return Constants.UNKNOWN_DOCUMENT_TYPE.toString(); } } @Override public DOMSource transform(DOMSource aDocument) { try { DOMSource res = transformation.transform(aDocument); if (res == null) { logTransformationReturnedNull(aDocument); return null; } return res; } catch (Exception e) { logTranformationThrewException(aDocument, e); return null; } } private void logTypeThrewException(String aFromTo, Exception aE) { LOGGER.log(Level.WARNING, "get" + aFromTo + " threw exception, returning default value " + Constants.UNKNOWN_DOCUMENT_TYPE, aE); } private void logTypeReturnedNull(String aFromTo) { LOGGER.log(Level.WARNING, "get" + aFromTo + " returned null, returning default value " + Constants.UNKNOWN_DOCUMENT_TYPE); } private void logTranformationThrewException(DOMSource aEvent, Exception aE) { LOGGER.log(Level.WARNING, "transformation " + id + " threw exception for event " + new XMLDocument(aEvent).print(true), aE); } private void logTransformationReturnedNull(DOMSource aEvent) { LOGGER.log(Level.WARNING, "transformation " + id + " returned null for event " + new XMLDocument(aEvent).print(true)); } }