Range Class — spring-boot Architecture

Source Code

core/spring-boot/src/main/java/org/springframework/boot/env/RandomValuePropertySource.java lines 178–218

	static final class Range<T extends Number> {

		private final String value;

		private final T min;

		private final T max;

		private Range(String value, T min, T max) {
			this.value = value;
			this.min = min;
			this.max = max;
		}

		T getMin() {
			return this.min;
		}

		T getMax() {
			return this.max;
		}

		@Override
		public String toString() {
			return this.value;
		}

		static <T extends Number & Comparable<T>> Range<T> of(String value, Function<String, T> parse) {
			T zero = parse.apply("0");
			String[] tokens = StringUtils.commaDelimitedListToStringArray(value);
			T min = parse.apply(tokens[0]);
			if (tokens.length == 1) {
				Assert.state(min.compareTo(zero) > 0, "Bound must be positive.");
				return new Range<>(value, zero, min);
			}
			T max = parse.apply(tokens[1]);
			Assert.state(min.compareTo(max) < 0, "Lower bound must be less than upper bound.");
			return new Range<>(value, min, max);
		}

	}