OriginTrackingConstructor Class — spring-boot Architecture

Source Code

core/spring-boot/src/main/java/org/springframework/boot/env/OriginTrackedYamlLoader.java lines 92–147

	private class OriginTrackingConstructor extends SafeConstructor {

		OriginTrackingConstructor(LoaderOptions loadingConfig) {
			super(loadingConfig);
		}

		@Override
		public @Nullable Object getData() throws NoSuchElementException {
			Object data = super.getData();
			if (data instanceof CharSequence charSequence && charSequence.isEmpty()) {
				return null;
			}
			return data;
		}

		@Override
		protected Object constructObject(Node node) {
			if (node instanceof SequenceNode sequenceNode && sequenceNode.getValue().isEmpty()) {
				return constructTrackedObject(node, "");
			}
			if (node instanceof ScalarNode) {
				if (!(node instanceof KeyScalarNode)) {
					return constructTrackedObject(node, super.constructObject(node));
				}
			}
			if (node instanceof MappingNode mappingNode) {
				replaceMappingNodeKeys(mappingNode);
			}
			return super.constructObject(node);
		}

		private void replaceMappingNodeKeys(MappingNode node) {
			List<NodeTuple> value = node.getValue();
			List<NodeTuple> newValue = new ArrayList<>(value.size());
			for (NodeTuple tuple : value) {
				newValue.add(KeyScalarNode.get(tuple));
			}
			node.setValue(newValue);
		}

		private Object constructTrackedObject(Node node, Object value) {
			Origin origin = getOrigin(node);
			return OriginTrackedValue.of(getValue(value), origin);
		}

		private Object getValue(@Nullable Object value) {
			return (value != null) ? value : "";
		}

		private Origin getOrigin(Node node) {
			Mark mark = node.getStartMark();
			Location location = new Location(mark.getLine(), mark.getColumn());
			return new TextResourceOrigin(OriginTrackedYamlLoader.this.resource, location);
		}

	}