SimpleMethodResolver.java 文件源码

/**
 * 判断某个方法是否可以暴露为服务，这里的判断条件是满足以下
 * <ul>
 * <li>1)参数只有一个</li>
 * <li>2)参数必须是protoc自动生成的GeneratedMessage类型的子类</li>
 * <li>3)返回不能为void</li>
 * <li>4)返回必须是protoc自动生成的GeneratedMessage类型的子类</li>
 * </ul>
 * 
 * @see com.baidu.beidou.navi.pbrpc.server.core.MethodResolver#isSupport(java.lang.reflect.Method)
 */
@Override
public boolean isSupport(Method m) {
    Class<?>[] paramTypes = m.getParameterTypes();
    Class<?> returnType = m.getReturnType();
    if (paramTypes.length != 1) {
        LOG.warn("Pbrpc only supports one parameter, skip " + m.getName());
        return false;
    }
    if (paramTypes[0].isAssignableFrom(GeneratedMessage.class)) {
        LOG.warn("Method argument type is not GeneratedMessage, skip " + m.getName());
        return false;
    }
    if (ReflectionUtil.isVoid(returnType)) {
        LOG.warn("Method return type should not be void, skip " + m.getName());
        return false;
    }
    if (returnType.isAssignableFrom(GeneratedMessage.class)) {
        LOG.warn("Method return type is not GeneratedMessage, skip " + m.getName());
        return false;
    }

    return true;
}