MessagePackRegistrar.java

/*
 * Copyright 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.springframework.obm.messagepack.support;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.msgpack.MessagePack;
import org.msgpack.Template;
import org.msgpack.template.builder.BeansTemplateBuilder;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.obm.messagepack.util.ReflectionUtils;

import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

/**
 * the registrar can crawl classes (and their interfaces, which in turn might depend on other classes)
 * and register all of then with MessagePack.
 *
 * @author Josh Long
 */
public class MessagePackRegistrar implements InitializingBean {
    private BeansTemplateBuilder beansTemplateBuilder = new BeansTemplateBuilder();

    private boolean serializeJavaBeanProperties = true;

    private Set<Class> classes = new HashSet<Class>();

    private Log log = LogFactory.getLog(getClass());

    public void setSerializeJavaBeanProperties(boolean serializeJavaBeanProperties) {
        this.serializeJavaBeanProperties = serializeJavaBeanProperties;
    }

    public void registerClasses(Collection<Class> clzz) {
        classes.addAll(clzz);
    }

    public void registerClasses(Class... clazz) {
        Collections.addAll(classes, clazz);
    }

    public void discoverClasses(Class clazzInterface) {
        ReflectionUtils.crawlJavaBeanObjectGraph(clazzInterface, new ReflectionUtils.ClassTraversalCallback() {
            @Override
            public void doWithClass(Class<?> foundClass) {
                if (log.isDebugEnabled()) {
                    log.debug("found " + foundClass.getName() + ".");
                }

                if (ReflectionUtils.isUninterestingClass(foundClass)) {
                    return;
                }
                if (!classes.contains(foundClass)) {
                    classes.add(foundClass);
                }

            }
        });
    }

    protected void register() {
        for (Class foundClass : this.classes) {
            if (serializeJavaBeanProperties) {
                Template template = beansTemplateBuilder.buildTemplate(foundClass);
                MessagePack.register(foundClass, template);
            } else {
                MessagePack.register(foundClass);
            }
        }
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        register();
    }
}