content: /*
   * Copyright 2012-2019 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
   *
   *      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.spring.start.site.extension.code.kotlin;
  
  import java.util.function.Function;
  
  import io.spring.initializr.generator.project.ProjectDescription;
  import io.spring.initializr.generator.spring.code.kotlin.KotlinVersionResolver;
  import io.spring.initializr.versionresolver.DependencyManagementVersionResolver;
  
  /**
   * {@link KotlinVersionResolver} that determines the Kotlin version using the dependency
   * management from the project description's platform version.
   *
   * @author Andy Wilkinson
   * @author Stephane Nicoll
   */
  public class ManagedDependenciesKotlinVersionResolver implements KotlinVersionResolver {
  
  	private final DependencyManagementVersionResolver resolver;
  
  	private final Function<ProjectDescription, String> fallback;
  
  	public ManagedDependenciesKotlinVersionResolver(DependencyManagementVersionResolver resolver,
  			Function<ProjectDescription, String> fallback) {
  		this.resolver = resolver;
  		this.fallback = fallback;
  	}
  
  	@Override
  	public String resolveKotlinVersion(ProjectDescription description) {
  		String kotlinVersion = this.resolver.resolve("org.springframework.boot", "spring-boot-dependencies",
  				description.getPlatformVersion().toString()).get("org.jetbrains.kotlin:kotlin-reflect");
  		return (kotlinVersion != null) ? kotlinVersion : this.fallback.apply(description);
  	}
  
  }
  