DATACMNS-1499 - Added new convenience factory methods on Range.

Author: odrotbohm

src/main/java/org/springframework/data/domain/Range.java

@@ -58,6 +58,84 @@ public static <T extends Comparable<T>> Range<T> unbounded() {
 		return (Range<T>) UNBOUNDED;
 	}
 
+	/**
+	 * Creates a new {@link Range} with inclusive bounds for both values.
+	 *
+	 * @param <T>
+	 * @param from must not be {@literal null}.
+	 * @param to must not be {@literal null}.
+	 * @return
+	 * @since 2.2
+	 */
+	public static <T extends Comparable<T>> Range<T> closed(T from, T to) {
+		return new Range<>(Bound.inclusive(from), Bound.inclusive(to));
+	}
+
+	/**
+	 * Creates a new {@link Range} with inclusive bounds for both values.
+	 *
+	 * @param <T>
+	 * @param from must not be {@literal null}.
+	 * @param to must not be {@literal null}.
+	 * @return
+	 * @since 2.2
+	 */
+	public static <T extends Comparable<T>> Range<T> open(T from, T to) {
+		return new Range<>(Bound.exclusive(from), Bound.exclusive(to));
+	}
+
+	/**
+	 * Creates a new left-open {@link Range}, i.e. left exclusive, right inclusive.
+	 *
+	 * @param <T>
+	 * @param from must not be {@literal null}.
+	 * @param to must not be {@literal null}.
+	 * @return
+	 * @since 2.2
+	 */
+	public static <T extends Comparable<T>> Range<T> leftOpen(T from, T to) {
+		return new Range<>(Bound.exclusive(from), Bound.inclusive(to));
+	}
+
+	/**
+	 * Creates a new right-open {@link Range}, i.e. left inclusive, right exclusive.
+	 *
+	 * @param <T>
+	 * @param from must not be {@literal null}.
+	 * @param to must not be {@literal null}.
+	 * @return
+	 * @since 2.2
+	 */
+	public static <T extends Comparable<T>> Range<T> rightOpen(T from, T to) {
+		return new Range<>(Bound.inclusive(from), Bound.exclusive(to));
+	}
+
+	/**
+	 * Creates a left-unbounded {@link Range} (the left bound set to {@link Bound#unbounded()}) with the given right
+	 * bound.
+	 *
+	 * @param <T>
+	 * @param to the right {@link Bound}, must not be {@literal null}.
+	 * @return
+	 * @since 2.2
+	 */
+	public static <T extends Comparable<T>> Range<T> leftUnbounded(Bound<T> to) {
+		return new Range<>(Bound.unbounded(), to);
+	}
+
+	/**
+	 * Creates a right-unbounded {@link Range} (the right bound set to {@link Bound#unbounded()}) with the given left
+	 * bound.
+	 *
+	 * @param <T>
+	 * @param to the left {@link Bound}, must not be {@literal null}.
+	 * @return
+	 * @since 2.2
+	 */
+	public static <T extends Comparable<T>> Range<T> rightUnbounded(Bound<T> from) {
+		return new Range<>(from, Bound.unbounded());
+	}
+
 	/**
 	 * Create a {@link RangeBuilder} given the lower {@link Bound}.
 	 *
@@ -72,16 +150,29 @@ public static <T extends Comparable<T>> RangeBuilder<T> from(Bound<T> lower) {
 	}
 
 	/**
-	 * Creates a new {@link Range} with the given lower and upper bound.
+	 * Creates a new {@link Range} with the given lower and upper bound. Prefer {@link #from(Bound)} for a more builder
+	 * style API.
 	 *
 	 * @param lowerBound must not be {@literal null}.
 	 * @param upperBound must not be {@literal null}.
 	 * @since 2.0
+	 * @see #from(Bound)
 	 */
 	public static <T extends Comparable<T>> Range<T> of(Bound<T> lowerBound, Bound<T> upperBound) {
 		return new Range<>(lowerBound, upperBound);
 	}
 
+	/**
+	 * Creates a new Range with the given value as sole member.
+	 *
+	 * @param <T>
+	 * @param value must not be {@literal null}.
+	 * @return
+	 */
+	public static <T extends Comparable<T>> Range<T> just(T value) {
+		return Range.closed(value, value);
+	}
+
 	/**
 	 * Returns whether the {@link Range} contains the given value.
 	 *

src/test/java/org/springframework/data/domain/RangeUnitTests.java

@@ -156,4 +156,55 @@ public void createsUnboundedRange() {
 		assertThat(range.getLowerBound().getValue()).isEmpty();
 		assertThat(range.getUpperBound().getValue()).isEmpty();
 	}
+
+	@Test // DATACMNS-1499
+	public void createsOpenRange() {
+
+		Range<Long> range = Range.open(5L, 10L);
+
+		assertThat(range.contains(5L)).isFalse();
+		assertThat(range.contains(10L)).isFalse();
+	}
+
+	@Test // DATACMNS-1499
+	public void createsClosedRange() {
+
+		Range<Long> range = Range.closed(5L, 10L);
+
+		assertThat(range.contains(5L)).isTrue();
+		assertThat(range.contains(10L)).isTrue();
+	}
+
+	@Test // DATACMNS-1499
+	public void createsLeftOpenRange() {
+
+		Range<Long> range = Range.leftOpen(5L, 10L);
+
+		assertThat(range.contains(5L)).isFalse();
+		assertThat(range.contains(10L)).isTrue();
+	}
+
+	@Test // DATACMNS-1499
+	public void createsRightOpenRange() {
+
+		Range<Long> range = Range.rightOpen(5L, 10L);
+
+		assertThat(range.contains(5L)).isTrue();
+		assertThat(range.contains(10L)).isFalse();
+	}
+
+	@Test // DATACMNS-1499
+	public void createsLeftUnboundedRange() {
+		assertThat(Range.leftUnbounded(Bound.inclusive(10L)).contains(-10000L)).isTrue();
+	}
+
+	@Test // DATACMNS-1499
+	public void createsRightUnboundedRange() {
+		assertThat(Range.rightUnbounded(Bound.inclusive(10L)).contains(10000L)).isTrue();
+	}
+
+	@Test // DATACMNS-1499
+	public void createsSingleValueRange() {
+		assertThat(Range.just(10L).contains(10L)).isTrue();
+	}
 }