YamlPropertySourceLoader Class — spring-boot Architecture

Source Code

core/spring-boot/src/main/java/org/springframework/boot/env/YamlPropertySourceLoader.java lines 37–63

public class YamlPropertySourceLoader implements PropertySourceLoader {

	@Override
	public String[] getFileExtensions() {
		return new String[] { "yml", "yaml" };
	}

	@Override
	public List<PropertySource<?>> load(String name, Resource resource) throws IOException {
		if (!ClassUtils.isPresent("org.yaml.snakeyaml.Yaml", getClass().getClassLoader())) {
			throw new IllegalStateException(
					"Attempted to load " + name + " but snakeyaml was not found on the classpath");
		}
		List<Map<String, Object>> loaded = new OriginTrackedYamlLoader(resource).load();
		if (loaded.isEmpty()) {
			return Collections.emptyList();
		}
		List<PropertySource<?>> propertySources = new ArrayList<>(loaded.size());
		for (int i = 0; i < loaded.size(); i++) {
			String documentNumber = (loaded.size() != 1) ? " (document #" + i + ")" : "";
			propertySources.add(new OriginTrackedMapPropertySource(name + documentNumber,
					Collections.unmodifiableMap(loaded.get(i)), true));
		}
		return propertySources;
	}

}