public static MethodComponentContext parse()

in src/main/java/org/opensearch/knn/index/MethodComponentContext.java [74:124]
42 lines of code
9 McCabe index (conditional complexity)

    public static MethodComponentContext parse(Object in) {
        if (!(in instanceof Map<?, ?>)) {
            throw new MapperParsingException("Unable to parse MethodComponent");
        }

        @SuppressWarnings("unchecked")
        Map<String, Object> methodMap = (Map<String, Object>) in;
        String name = "";
        Map<String, Object> parameters = new HashMap<>();

        String key;
        Object value;

        for (Map.Entry<String, Object> methodEntry : methodMap.entrySet()) {
            key = methodEntry.getKey();
            value = methodEntry.getValue();

            if (NAME.equals(key)) {
                if (!(value instanceof String)) {
                    throw new MapperParsingException("Component name should be a string");
                }
                name = (String) value;
            } else if (PARAMETERS.equals(key)) {
                if (!(value instanceof Map)) {
                    throw new MapperParsingException("Unable to parse parameters for  method component");
                }

                // Check to interpret map parameters as sub-methodComponentContexts
                @SuppressWarnings("unchecked")
                Map<String, Object> parameters1 = ((Map<String, Object>) value).entrySet().stream().collect(Collectors.toMap(
                        Map.Entry::getKey, e -> {
                            Object v = e.getValue();
                            if (v instanceof Map) {
                                return MethodComponentContext.parse(v);
                            }
                            return v;
                        }
                ));

                parameters = parameters1;
            } else {
                throw new MapperParsingException("Invalid parameter for MethodComponentContext: " + key);
            }
        }

        if (name.isEmpty()) {
            throw new MapperParsingException(NAME + " needs to be set");
        }

        return new MethodComponentContext(name, parameters);
    }