/*
 * Copyright 2014 - 2017 Blazebit.
 *
 * 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 com.blazebit.persistence.view.impl.spring;

import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.core.env.Environment;
import org.springframework.core.io.ResourceLoader;
import org.springframework.core.type.filter.TypeFilter;

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

/**
 * @author Moritz Becker (moritz.becker@gmx.at)
 * @since 1.2
 */
public abstract class AbstractEntityViewConfigurationSource {

    private final Environment environment;

    public AbstractEntityViewConfigurationSource(Environment environment) {
        this.environment = environment;
    }

    public abstract Iterable<String> getBasePackages();

    protected abstract Iterable<TypeFilter> getExcludeFilters();

    protected abstract Iterable<TypeFilter> getIncludeFilters();

    public Collection<BeanDefinition> getCandidates(ResourceLoader resourceLoader) {
        EntityViewComponentProvider scanner = new EntityViewComponentProvider(getIncludeFilters());
//        scanner.setConsiderNestedRepositoryInterfaces(shouldConsiderNestedRepositories());
        scanner.setResourceLoader(resourceLoader);
        scanner.setEnvironment(environment);

        for (TypeFilter filter : getExcludeFilters()) {
            scanner.addExcludeFilter(filter);
        }

        Set<BeanDefinition> result = new HashSet<BeanDefinition>();

        for (String basePackage : getBasePackages()) {
            Set<BeanDefinition> candidate = scanner.findCandidateComponents(basePackage);
            result.addAll(candidate);
        }

        return result;
    }
}