Extend copy signature for Number subclasses.

Author: mp911de

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

@@ -48,7 +48,7 @@ static Vector copy(double[] v) {
 	/**
 	 * Copy the given numeric values and wrap within a Vector.
 	 */
-	static Vector copy(Collection<Number> v) {
+	static Vector copy(Collection<? extends Number> v) {
 
 		double[] copy = new double[v.size()];
 		int i = 0;

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

@@ -48,7 +48,7 @@ static Vector copy(float[] v) {
 	/**
 	 * Copy the given numeric values and wrap within a Vector.
 	 */
-	static Vector copy(Collection<Number> v) {
+	static Vector copy(Collection<? extends Number> v) {
 
 		float[] copy = new float[v.size()];
 		int i = 0;

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

@@ -48,7 +48,7 @@ static Vector copy(Number[] v) {
 	/**
 	 * Copy the given {@link Number} and wrap it within a Vector.
 	 */
-	static Vector copy(Collection<Number> numbers) {
+	static Vector copy(Collection<? extends Number> numbers) {
 
 		Number[] copy = new Number[numbers.size()];
 

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

@@ -72,7 +72,7 @@ static Vector of(double... values) {
 	 * @param values number vector values.
 	 * @return the {@link Vector} for the given vector values.
 	 */
-	static Vector of(Collection<Number> values) {
+	static Vector of(Collection<? extends Number> values) {
 
 		Assert.notNull(values, "Vector values must not be null");