io.micronaut.starter.cli.MicronautFactory Maven / Gradle / Ivy

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/*
 * Copyright 2017-2022 original 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
 *
 * https://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 io.micronaut.starter.cli;

import io.micronaut.context.ApplicationContext;
import io.micronaut.context.BeanContext;
import io.micronaut.core.annotation.TypeHint;
import picocli.CommandLine;

import java.util.Optional;

import static io.micronaut.core.annotation.TypeHint.AccessType.ALL_DECLARED_CONSTRUCTORS;
import static io.micronaut.core.annotation.TypeHint.AccessType.ALL_DECLARED_FIELDS;

/**
 * Picocli factory implementation that uses a Micronaut BeanContext to obtain bean instances.
 */
@TypeHint(typeNames = {
    "picocli.CommandLine$AutoHelpMixin",
    "picocli.CommandLine$Model$CommandSpec"
}, accessType = {ALL_DECLARED_CONSTRUCTORS, ALL_DECLARED_FIELDS})
public class MicronautFactory implements CommandLine.IFactory {

    private final CommandLine.IFactory defaultFactory = CommandLine.defaultFactory();
    private final BeanContext beanContext;

    public MicronautFactory() {
        this(ApplicationContext.run());
    }

    public MicronautFactory(BeanContext beanContext) {
        this.beanContext = beanContext;
    }

    @Override
    public  K create(Class cls) throws Exception {
        Optional bean = beanContext.findOrInstantiateBean(cls);
        return bean.isPresent() ? bean.get() : defaultFactory.create(cls);
    }
}