public void customize()

in initializer-generator/src/main/java/io/spring/start/site/project/JavaVersionProjectDescriptionCustomizer.java [65:155]
76 lines of code
30 McCabe index (conditional complexity)

	public void customize(MutableProjectDescription description) {
		String javaVersion = description.getLanguage().jvmVersion();
		if (UNSUPPORTED_VERSIONS.contains(javaVersion)) {
			updateTo(description, "1.8");
			return;
		}
		springNativeHandler().accept(description);
		Integer javaGeneration = determineJavaGeneration(javaVersion);
		if (javaGeneration == null) {
			return;
		}
		Version platformVersion = description.getPlatformVersion();
		// Spring Boot 3 requires Java 17
		if (javaGeneration < 17 && SPRING_BOOT_3_0_0_OR_LATER.match(platformVersion)) {
			updateTo(description, "17");
			return;
		}

		// 13 support only as of Gradle 6
		if (javaGeneration == 13 && description.getBuildSystem() instanceof GradleBuildSystem
				&& !GRADLE_6.match(platformVersion)) {
			updateTo(description, "11");
		}
		// 15 support only as of 2.2.11
		if (javaGeneration == 15 && !SPRING_BOOT_2_3_0_OR_LATER.match(platformVersion)) {
			updateTo(description, "11");
		}
		if (javaGeneration == 16) {
			// Full Support as of Spring Boot 2.5 only.
			// 16 support as of Kotlin 1.5
			if (description.getLanguage() instanceof KotlinLanguage
					&& !SPRING_BOOT_2_5_0_OR_LATER.match(platformVersion)) {
				updateTo(description, "11");
			}
			// 16 support as of Gradle 7
			if (description.getBuildSystem() instanceof GradleBuildSystem
					&& !SPRING_BOOT_2_5_0_OR_LATER.match(platformVersion)) {
				updateTo(description, "11");
			}
			// Groovy 3 only available as of 2.5
			if (description.getLanguage() instanceof GroovyLanguage
					&& !SPRING_BOOT_2_5_0_OR_LATER.match(platformVersion)) {
				updateTo(description, "11");
			}
			// 16 support only as of 2.4.4
			if (!SPRING_BOOT_2_4_4_OR_LATER.match(platformVersion)) {
				updateTo(description, "11");
			}
		}
		if (javaGeneration == 17) {
			// Java 17 support as of Spring Boot 2.5.5
			if (!SPRING_BOOT_2_5_5_OR_LATER.match(platformVersion)) {
				updateTo(description, "11");
			}
			// Kotlin 1.6 only
			if (description.getLanguage() instanceof KotlinLanguage
					&& !SPRING_BOOT_2_6_0_OR_LATER.match(platformVersion)) {
				updateTo(description, "11");
			}
		}
		if (javaGeneration == 18) {
			// Java 17 support as of Spring Boot 2.5.11
			if (!SPRING_BOOT_2_5_11_OR_LATER.match(platformVersion)) {
				updateTo(description, "17");
			}
			// Kotlin support to be determined
			if (description.getLanguage() instanceof KotlinLanguage) {
				if (!SPRING_BOOT_2_6_0_OR_LATER.match(platformVersion)) {
					updateTo(description, "11");
				}
				else {
					updateTo(description, "17");
				}
			}
		}
		if (javaGeneration == 19) {
			// Java 18 support as of Spring Boot 2.6.12
			if (!SPRING_BOOT_2_6_12_OR_LATER.match(platformVersion)) {
				updateTo(description, "17");
			}
			// Kotlin support to be determined
			if (description.getLanguage() instanceof KotlinLanguage) {
				if (!SPRING_BOOT_2_6_0_OR_LATER.match(platformVersion)) {
					updateTo(description, "11");
				}
				else {
					updateTo(description, "17");
				}
			}
		}
	}