/** * Copyright (c) Codice Foundation * <p> * This is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser * General Public License as published by the Free Software Foundation, either version 3 of the * License, or any later version. * <p> * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. A copy of the GNU Lesser General Public License * is distributed along with this program and can be found at * <http://www.gnu.org/licenses/lgpl.html>. */ package ddf.catalog.util.impl; import org.osgi.service.blueprint.container.Converter; import org.osgi.service.blueprint.container.ReifiedType; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * This converter is used to allow {@link DescribableServiceMap} objects to pass through for * {@link java.util.Map} implementations. Without this converter, blueprint will copy the map and lose the reference. */ public class MapConverter implements Converter { private static final Logger LOGGER = LoggerFactory.getLogger(MapConverter.class); /** * @param sourceObject object considering to be converted * @param targetType The target type {@code T}. * @return true if sourceObject is an instance of DescribableServiceMap; false otherwise */ @Override public boolean canConvert(Object sourceObject, ReifiedType targetType) { LOGGER.trace("Deciphering if canConvert "); if (targetType != null) { LOGGER.debug("ReifiedType: {}", targetType.getRawClass()); } return (sourceObject instanceof DescribableServiceMap); } /** * Converts (casts) the sourceObject to a DescribableServiceMap. * * @param sourceObject object being converted * @param targetType The target type {@code T}. * @return sourceObject cast to a DescribableServiceMap */ @Override public Object convert(Object sourceObject, ReifiedType targetType) throws Exception { LOGGER.trace("Converting {}", sourceObject); return ((DescribableServiceMap) sourceObject); } }