org.springsource.restbucks.training.order.web.OrderControllerEventListener.java Source code

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Here is the source code for org.springsource.restbucks.training.order.web.OrderControllerEventListener.java

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/*
 * Copyright 2012-2013 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.springsource.restbucks.training.order.web;

import org.springframework.data.rest.core.event.AbstractRepositoryEventListener;
import org.springsource.restbucks.training.order.Order;

/**
 * Event listener to reject {@code DELETE} requests to Spring Data REST.
 * 
 * @author Oliver Gierke
 */
// TODO-05.00: ---- Spring Data REST event listeners ----
// TODO-05.01: Enable event listener
// @Component
@SuppressWarnings("rawtypes")
class OrderControllerEventListener extends AbstractRepositoryEventListener {

    /* 
     * (non-Javadoc)
     * @see org.springframework.data.rest.repository.context.AbstractRepositoryEventListener#onBeforeDelete(java.lang.Object)
     */
    @Override
    protected void onBeforeDelete(Object entity) {

        if (entity instanceof Order) {

            Order order = (Order) entity;

            if (order.isPaid()) {
                throw new OrderAlreadyPaidException();
            }
        }
    }
}