AliasedConfigurationPropertySource Class — spring-boot Architecture

Source Code

core/spring-boot/src/main/java/org/springframework/boot/context/properties/source/AliasedConfigurationPropertySource.java lines 29–91

class AliasedConfigurationPropertySource implements ConfigurationPropertySource {

	private final ConfigurationPropertySource source;

	private final ConfigurationPropertyNameAliases aliases;

	AliasedConfigurationPropertySource(ConfigurationPropertySource source, ConfigurationPropertyNameAliases aliases) {
		Assert.notNull(source, "'source' must not be null");
		Assert.notNull(aliases, "'aliases' must not be null");
		this.source = source;
		this.aliases = aliases;
	}

	@Override
	public @Nullable ConfigurationProperty getConfigurationProperty(ConfigurationPropertyName name) {
		Assert.notNull(name, "'name' must not be null");
		ConfigurationProperty result = getSource().getConfigurationProperty(name);
		if (result == null) {
			ConfigurationPropertyName aliasedName = getAliases().getNameForAlias(name);
			result = (aliasedName != null) ? getSource().getConfigurationProperty(aliasedName) : null;
		}
		return result;
	}

	@Override
	public ConfigurationPropertyState containsDescendantOf(ConfigurationPropertyName name) {
		Assert.notNull(name, "'name' must not be null");
		ConfigurationPropertyState result = this.source.containsDescendantOf(name);
		if (result != ConfigurationPropertyState.ABSENT) {
			return result;
		}
		for (ConfigurationPropertyName alias : getAliases().getAliases(name)) {
			ConfigurationPropertyState aliasResult = this.source.containsDescendantOf(alias);
			if (aliasResult != ConfigurationPropertyState.ABSENT) {
				return aliasResult;
			}
		}
		for (ConfigurationPropertyName from : getAliases()) {
			for (ConfigurationPropertyName alias : getAliases().getAliases(from)) {
				if (name.isAncestorOf(alias)) {
					if (this.source.getConfigurationProperty(from) != null) {
						return ConfigurationPropertyState.PRESENT;
					}
				}
			}
		}
		return ConfigurationPropertyState.ABSENT;
	}

	@Override
	public @Nullable Object getUnderlyingSource() {
		return this.source.getUnderlyingSource();
	}

	protected ConfigurationPropertySource getSource() {
		return this.source;
	}

	protected ConfigurationPropertyNameAliases getAliases() {
		return this.aliases;
	}

}