org.seasar.doma.boot.autoconfigure.TryLookupEntityListenerProvider.java Source code

Introduction

Here is the source code for org.seasar.doma.boot.autoconfigure.TryLookupEntityListenerProvider.java

Source

/*
 * Copyright (C) 2004-2016 the Seasar Foundation and the Others.
 *
 * 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.seasar.doma.boot.autoconfigure;

import java.util.Map;
import java.util.function.Supplier;

import org.seasar.doma.jdbc.EntityListenerProvider;
import org.seasar.doma.jdbc.entity.EntityListener;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * {@link EntityListenerProvider} implementation that {@link EntityListener} managed by
 * Spring Framework, or else created by Doma.
 * 
 * @author backpaper0
 *
 */
class TryLookupEntityListenerProvider implements EntityListenerProvider, ApplicationContextAware {

    private ApplicationContext context;

    @Override
    public <ENTITY, LISTENER extends EntityListener<ENTITY>> LISTENER get(Class<LISTENER> listenerClass,
            Supplier<LISTENER> listenerSupplier) {
        Map<String, LISTENER> beans = context.getBeansOfType(listenerClass);
        if (beans.size() > 1) {
            throw new IllegalStateException("Bean type of " + listenerClass + " bean must be unique!");
        }
        return beans.values().stream().findAny().orElseGet(listenerSupplier);
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.context = applicationContext;
    }
}