MapConfigurationPropertySource Class — spring-boot Architecture

Source Code

core/spring-boot/src/main/java/org/springframework/boot/context/properties/source/MapConfigurationPropertySource.java lines 38–114

public class MapConfigurationPropertySource implements IterableConfigurationPropertySource {

	private static final PropertyMapper[] DEFAULT_MAPPERS = { DefaultPropertyMapper.INSTANCE };

	private final Map<String, Object> source;

	private final IterableConfigurationPropertySource delegate;

	/**
	 * Create a new empty {@link MapConfigurationPropertySource} instance.
	 */
	public MapConfigurationPropertySource() {
		this(Collections.emptyMap());
	}

	/**
	 * Create a new {@link MapConfigurationPropertySource} instance with entries copies
	 * from the specified map.
	 * @param map the source map
	 */
	public MapConfigurationPropertySource(Map<?, ?> map) {
		this.source = new LinkedHashMap<>();
		MapPropertySource mapPropertySource = new MapPropertySource("source", this.source);
		this.delegate = new SpringIterableConfigurationPropertySource(mapPropertySource, false, DEFAULT_MAPPERS);
		putAll(map);
	}

	/**
	 * Add all entries from the specified map.
	 * @param map the source map
	 */
	public void putAll(Map<?, ?> map) {
		Assert.notNull(map, "'map' must not be null");
		assertNotReadOnlySystemAttributesMap(map);
		map.forEach(this::put);
	}

	/**
	 * Add an individual entry.
	 * @param name the name
	 * @param value the value
	 */
	public void put(Object name, Object value) {
		Assert.notNull(name, "'name' must not be null");
		this.source.put(name.toString(), value);
	}

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

	@Override
	public @Nullable ConfigurationProperty getConfigurationProperty(ConfigurationPropertyName name) {
		return this.delegate.getConfigurationProperty(name);
	}

	@Override
	public Iterator<ConfigurationPropertyName> iterator() {
		return this.delegate.iterator();
	}

	@Override
	public Stream<ConfigurationPropertyName> stream() {
		return this.delegate.stream();
	}

	private void assertNotReadOnlySystemAttributesMap(Map<?, ?> map) {
		try {
			map.size();
		}
		catch (UnsupportedOperationException ex) {
			throw new IllegalArgumentException("Security restricted maps are not supported", ex);
		}
	}

}