/*
 * Copyright 2005-2011 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.wamblee.xmlrouter.listener;

import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.print.attribute.standard.Destination;
import javax.xml.transform.dom.DOMSource;

import org.wamblee.xml.XMLDocument;
import org.wamblee.xmlrouter.common.Id;
import org.wamblee.xmlrouter.config.Transformation;

/**
 * Event logger that simply logs to java.util logging.
 * 
 * @author Erik Brakkee
 * 
 */
public class LoggingEventListener implements EventListener {
    private static final Logger LOGGER = Logger
        .getLogger(LoggingEventListener.class.getName());

    private Level level;

    public LoggingEventListener(Level aLevel) {
        level = aLevel;
    }

    @Override
    public void delivered(String aDocType, Id<DOMSource> aEventId,
        DOMSource aEvent, List<Transformation> aSequence,
        Id<Destination> aDestination, String aDestinationName,
        boolean aSuccessFlag) {
        if (LOGGER.isLoggable(level)) {
            LOGGER.log(level, "event delivered: document type '" + aDocType +
                "', eventId " + aEventId + ", event '" +
                new XMLDocument(aEvent).print(true) + "', sequence '" +
                getSequenceString(aSequence) + "', destionationId " +
                aDestination + ", destinationName '" + aDestinationName + "'");
        }
    }

    private String getSequenceString(List<Transformation> aSequence) {
        StringBuffer buf = new StringBuffer();
        for (Transformation transformation : aSequence) {
            buf.append(transformation.getName());
            buf.append("(");
            buf.append(transformation.getFromType());
            buf.append("->");
            buf.append(transformation.getToType());
            buf.append(")");
        }
        return buf.toString();
    }

    @Override
    public void notDelivered(String aDocumentType, Id<DOMSource> aEventId,
        DOMSource aEvent) {
        if (LOGGER.isLoggable(level)) {
            LOGGER.log(level, "event not delivered: document type '" +
                aDocumentType + "', eventId " + aEventId + ", event '" +
                new XMLDocument(aEvent).print(true) + "'");
        }
    }
}