AbstractCloudantEventListener.java

/*
 *
 *  * Copyright 2010-2012 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.springframework.data.cloudant.core.mapping.event;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationListener;
import org.springframework.core.GenericTypeResolver;
import com.cloudant.client.api.model.Document;


public class AbstractCloudantEventListener<E> implements ApplicationListener<CloudantMappingEvent<?>> {
    private static final Logger LOG = LoggerFactory.getLogger(AbstractCloudantEventListener.class);
    private final Class<?> domainClass;

    public AbstractCloudantEventListener() {
        Class<?> typeArgument = GenericTypeResolver.resolveTypeArgument(getClass(), AbstractCloudantEventListener.class);
        domainClass = typeArgument == null ? Object.class : typeArgument;
    }

    @SuppressWarnings("rawtypes")
    public void onApplicationEvent(CloudantMappingEvent<?> event) {

        E source = (E) event.getSource();
        // Check for matching domain type and invoke callbacks
        if (source != null && !domainClass.isAssignableFrom(source.getClass())) {
            return;
        }

        if (event instanceof BeforeDeleteEvent) {
            onBeforeDelete(event.getSource(), event.getDocument());
            return;
        } else if (event instanceof AfterDeleteEvent) {
            onAfterDelete(event.getSource(), event.getDocument());
            return;
        }

        if (event instanceof BeforeConvertEvent) {
            onBeforeConvert(source);
        } else if (event instanceof BeforeSaveEvent) {
            onBeforeSave(source, event.getDocument());
        } else if (event instanceof AfterSaveEvent) {
            onAfterSave(source, event.getDocument());
        }
    }

    public void onBeforeConvert(E source) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("onBeforeConvert({})", source);
        }
    }

    public void onBeforeSave(E source, Document doc) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("onBeforeSave({}, {})", source, doc);
        }
    }

    public void onAfterSave(E source, Document doc) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("onAfterSave({}, {})", source, doc);
        }
    }

    public void onAfterDelete(Object source, Document doc) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("onAfterConvert({})", doc);
        }
    }

    public void onBeforeDelete(Object source, Document doc) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("onAfterConvert({})", doc);
        }
    }

}