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commit 55e7cf0a51378a99e4cf6894b80e47f81f91e312
Author: Gilles Sadowski <gillese...@gmail.com>
AuthorDate: Mon May 31 02:42:34 2021 +0200
MATH-1596: Remove dependency on "RandomVectorGenerator".
---
.../commons/math4/legacy/random/HaltonSequenceGenerator.java | 12 +++++++-----
.../commons/math4/legacy/random/SobolSequenceGenerator.java | 12 ++++++------
.../math4/legacy/random/HaltonSequenceGeneratorTest.java | 6 +++---
.../math4/legacy/random/SobolSequenceGeneratorTest.java | 4 ++--
4 files changed, 18 insertions(+), 16 deletions(-)
diff --git
a/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/random/HaltonSequenceGenerator.java
b/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/random/HaltonSequenceGenerator.java
index 63dda90..ff620b9 100644
---
a/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/random/HaltonSequenceGenerator.java
+++
b/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/random/HaltonSequenceGenerator.java
@@ -16,6 +16,8 @@
*/
package org.apache.commons.math4.legacy.random;
+import java.util.function.Supplier;
+
import org.apache.commons.math4.legacy.exception.DimensionMismatchException;
import org.apache.commons.math4.legacy.exception.NotPositiveException;
import org.apache.commons.math4.legacy.exception.NullArgumentException;
@@ -41,7 +43,7 @@ import
org.apache.commons.math4.legacy.exception.OutOfRangeException;
* <p>
* The generator supports two modes:
* <ul>
- * <li>sequential generation of points: {@link #nextVector()}</li>
+ * <li>sequential generation of points: {@link #get()}</li>
* <li>random access to the i-th point in the sequence: {@link
#skipTo(int)}</li>
* </ul>
*
@@ -50,7 +52,7 @@ import
org.apache.commons.math4.legacy.exception.OutOfRangeException;
* On the Halton sequence and its scramblings</a>
* @since 3.3
*/
-public class HaltonSequenceGenerator implements RandomVectorGenerator {
+public class HaltonSequenceGenerator implements Supplier<double[]> {
/** The first 40 primes. */
private static final int[] PRIMES = new int[] {
@@ -119,7 +121,7 @@ public class HaltonSequenceGenerator implements
RandomVectorGenerator {
/** {@inheritDoc} */
@Override
- public double[] nextVector() {
+ public double[] get() {
final double[] v = new double[dimension];
for (int i = 0; i < dimension; i++) {
int index = count;
@@ -165,12 +167,12 @@ public class HaltonSequenceGenerator implements
RandomVectorGenerator {
*/
public double[] skipTo(final int index) {
count = index;
- return nextVector();
+ return get();
}
/**
* Returns the index i of the next point in the Halton sequence that will
be returned
- * by calling {@link #nextVector()}.
+ * by calling {@link #get()}.
*
* @return the index of the next point
*/
diff --git
a/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/random/SobolSequenceGenerator.java
b/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/random/SobolSequenceGenerator.java
index c43b4f1..3bcb8ce 100644
---
a/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/random/SobolSequenceGenerator.java
+++
b/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/random/SobolSequenceGenerator.java
@@ -24,6 +24,7 @@ import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.NoSuchElementException;
import java.util.StringTokenizer;
+import java.util.function.Supplier;
import org.apache.commons.math4.legacy.exception.MathInternalError;
import org.apache.commons.math4.legacy.exception.MathParseException;
@@ -44,7 +45,7 @@ import org.apache.commons.math4.legacy.util.FastMath;
* <p>
* The generator supports two modes:
* <ul>
- * <li>sequential generation of points: {@link #nextVector()}</li>
+ * <li>sequential generation of points: {@link #get()}</li>
* <li>random access to the i-th point in the sequence: {@link
#skipTo(int)}</li>
* </ul>
*
@@ -53,8 +54,7 @@ import org.apache.commons.math4.legacy.util.FastMath;
*
* @since 3.3
*/
-public class SobolSequenceGenerator implements RandomVectorGenerator {
-
+public class SobolSequenceGenerator implements Supplier<double[]> {
/** The number of bits to use. */
private static final int BITS = 52;
@@ -253,7 +253,7 @@ public class SobolSequenceGenerator implements
RandomVectorGenerator {
/** {@inheritDoc} */
@Override
- public double[] nextVector() {
+ public double[] get() {
final double[] v = new double[dimension];
if (count == 0) {
count++;
@@ -308,12 +308,12 @@ public class SobolSequenceGenerator implements
RandomVectorGenerator {
}
}
count = index;
- return nextVector();
+ return get();
}
/**
* Returns the index i of the next point in the Sobol sequence that will
be returned
- * by calling {@link #nextVector()}.
+ * by calling {@link #get()}.
*
* @return the index of the next point
*/
diff --git
a/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/random/HaltonSequenceGeneratorTest.java
b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/random/HaltonSequenceGeneratorTest.java
index a756b30..4dd800b 100644
---
a/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/random/HaltonSequenceGeneratorTest.java
+++
b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/random/HaltonSequenceGeneratorTest.java
@@ -61,7 +61,7 @@ public class HaltonSequenceGeneratorTest {
@Test
public void test3DReference() {
for (int i = 0; i < referenceValues.length; i++) {
- double[] result = generator.nextVector();
+ double[] result = generator.get();
Assert.assertArrayEquals(referenceValues[i], result, 1e-3);
Assert.assertEquals(i + 1, generator.getNextIndex());
}
@@ -71,7 +71,7 @@ public class HaltonSequenceGeneratorTest {
public void test2DUnscrambledReference() {
generator = new HaltonSequenceGenerator(2, new int[] {2, 3}, null);
for (int i = 0; i < referenceValuesUnscrambled.length; i++) {
- double[] result = generator.nextVector();
+ double[] result = generator.get();
Assert.assertArrayEquals(referenceValuesUnscrambled[i], result,
1e-3);
Assert.assertEquals(i + 1, generator.getNextIndex());
}
@@ -125,7 +125,7 @@ public class HaltonSequenceGeneratorTest {
Assert.assertEquals(6, generator.getNextIndex());
for (int i = 6; i < referenceValues.length; i++) {
- result = generator.nextVector();
+ result = generator.get();
Assert.assertArrayEquals(referenceValues[i], result, 1e-3);
Assert.assertEquals(i + 1, generator.getNextIndex());
}
diff --git
a/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/random/SobolSequenceGeneratorTest.java
b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/random/SobolSequenceGeneratorTest.java
index d77894c..11c45a3 100644
---
a/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/random/SobolSequenceGeneratorTest.java
+++
b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/random/SobolSequenceGeneratorTest.java
@@ -50,7 +50,7 @@ public class SobolSequenceGeneratorTest {
@Test
public void test3DReference() {
for (int i = 0; i < referenceValues.length; i++) {
- double[] result = generator.nextVector();
+ double[] result = generator.get();
Assert.assertArrayEquals(referenceValues[i], result, 1e-6);
Assert.assertEquals(i + 1, generator.getNextIndex());
}
@@ -98,7 +98,7 @@ public class SobolSequenceGeneratorTest {
Assert.assertEquals(6, generator.getNextIndex());
for (int i = 6; i < referenceValues.length; i++) {
- result = generator.nextVector();
+ result = generator.get();
Assert.assertArrayEquals(referenceValues[i], result, 1e-6);
Assert.assertEquals(i + 1, generator.getNextIndex());
}
