PropertyMapper Type — spring-boot Architecture

Source Code

core/spring-boot/src/main/java/org/springframework/boot/context/properties/source/PropertyMapper.java lines 41–73

interface PropertyMapper {

	/**
	 * The default ancestor of check.
	 */
	BiPredicate<ConfigurationPropertyName, ConfigurationPropertyName> DEFAULT_ANCESTOR_OF_CHECK = ConfigurationPropertyName::isAncestorOf;

	/**
	 * Provide mappings from a {@link ConfigurationPropertySource}
	 * {@link ConfigurationPropertyName}.
	 * @param configurationPropertyName the name to map
	 * @return the mapped names or an empty list
	 */
	List<String> map(ConfigurationPropertyName configurationPropertyName);

	/**
	 * Provide mappings from a {@link PropertySource} property name.
	 * @param propertySourceName the name to map
	 * @return the mapped configuration property name or
	 * {@link ConfigurationPropertyName#EMPTY}
	 */
	ConfigurationPropertyName map(String propertySourceName);

	/**
	 * Returns a {@link BiPredicate} that can be used to check if one name is an ancestor
	 * of another when considering the mapping rules.
	 * @return a predicate that can be used to check if one name is an ancestor of another
	 */
	default BiPredicate<ConfigurationPropertyName, ConfigurationPropertyName> getAncestorOfCheck() {
		return DEFAULT_ANCESTOR_OF_CHECK;
	}

}