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/*
 * Copyright 2014 Red Hat, Inc. and/or its affiliates.
 *
 * 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.kie.spring.annotations;

import org.kie.api.builder.ReleaseId;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanDefinitionHolder;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.RootBeanDefinition;

import java.util.LinkedHashSet;
import java.util.Set;

public class AnnotationsUtil {

    private static final String KIE_ANNOTATION_PROCESSOR_CLASS_NAME =
            "org.kie.spring.annotations.AnnotationsPostProcessor";


    /**
     * Register all relevant annotation post processors in the given registry.
     * @param registry the registry to operate on
     */
    public static void registerAnnotationConfigProcessors(BeanDefinitionRegistry registry, ReleaseId releaseId) {
        registerAnnotationConfigProcessors(registry, null, releaseId);
    }

    /**
     * Register all relevant annotation post processors in the given registry.
     * @param registry the registry to operate on
     * @param source the configuration source element (already extracted)
     * that this registration was triggered from. May be null.
     * @return a Set of BeanDefinitionHolders, containing all bean definitions
     * that have actually been registered by this call
     */
    public static Set registerAnnotationConfigProcessors(
            BeanDefinitionRegistry registry, Object source, ReleaseId releaseId) {

        Set beanDefs = new LinkedHashSet(1);

        if (!registry.containsBeanDefinition(KIE_ANNOTATION_PROCESSOR_CLASS_NAME)) {
            RootBeanDefinition def = new RootBeanDefinition(AnnotationsPostProcessor.class);
            def.setSource(source);
            def.getPropertyValues().add("releaseId", releaseId);
            beanDefs.add(registerPostProcessor(registry, def, KIE_ANNOTATION_PROCESSOR_CLASS_NAME));
        }

        return beanDefs;
    }

    private static BeanDefinitionHolder registerPostProcessor(
            BeanDefinitionRegistry registry, RootBeanDefinition definition, String beanName) {

        definition.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
        registry.registerBeanDefinition(beanName, definition);
        return new BeanDefinitionHolder(definition, beanName);
    }
}