Renamed ExtendedFieldElement into RealFieldElement.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1454903 13f79535-47bb-0310-9956-ffa450edef68

src/changes/changes.xml

@@ -81,10 +81,10 @@ This is a minor release: It combines bug fixes and new features.
         behave across events in ODE events detection.
       </action>
       <action dev="luc" type="add" >
-        Added Hermite interpolator for ExtendFieldElement instances.
+        Added Hermite interpolator for RealFieldElement instances.
       </action>
       <action dev="luc" type="add" >
-        Added ExtendFieldElement interface to represent anything that is
+        Added RealFieldElement interface to represent anything that is
         real number like, implemented by both Decimal64, Dfp and DerivativeStructure.  
       </action>
       <action dev="luc" type="add" >

src/main/java/org/apache/commons/math3/RealFieldElement.java

@@ -29,7 +29,7 @@ import org.apache.commons.math3.exception.DimensionMismatchException;
  * @version $Id$
  * @since 3.2
  */
-public interface ExtendedFieldElement<T> extends FieldElement<T> {
+public interface RealFieldElement<T> extends FieldElement<T> {
 
     /** Get the real value of the number.
      * @return real value

src/main/java/org/apache/commons/math3/analysis/differentiation/DerivativeStructure.java

@@ -18,7 +18,7 @@ package org.apache.commons.math3.analysis.differentiation;
 
 import java.io.Serializable;
 
-import org.apache.commons.math3.ExtendedFieldElement;
+import org.apache.commons.math3.RealFieldElement;
 import org.apache.commons.math3.Field;
 import org.apache.commons.math3.FieldElement;
 import org.apache.commons.math3.exception.DimensionMismatchException;
@@ -58,7 +58,7 @@ import org.apache.commons.math3.util.MathUtils;
  * @version $Id$
  * @since 3.1
  */
-public class DerivativeStructure implements ExtendedFieldElement<DerivativeStructure>, Serializable {
+public class DerivativeStructure implements RealFieldElement<DerivativeStructure>, Serializable {
 
     /** Serializable UID. */
     private static final long serialVersionUID = 20120730L;

src/main/java/org/apache/commons/math3/dfp/Dfp.java

@@ -19,7 +19,7 @@ package org.apache.commons.math3.dfp;
 
 import java.util.Arrays;
 
-import org.apache.commons.math3.ExtendedFieldElement;
+import org.apache.commons.math3.RealFieldElement;
 import org.apache.commons.math3.exception.DimensionMismatchException;
 import org.apache.commons.math3.util.FastMath;
 
@@ -95,7 +95,7 @@ import org.apache.commons.math3.util.FastMath;
  * @version $Id$
  * @since 2.2
  */
-public class Dfp implements ExtendedFieldElement<Dfp> {
+public class Dfp implements RealFieldElement<Dfp> {
 
     /** The radix, or base of this system.  Set to 10000 */
     public static final int RADIX = 10000;

src/main/java/org/apache/commons/math3/geometry/euclidean/threed/FieldRotation.java

@@ -19,7 +19,7 @@ package org.apache.commons.math3.geometry.euclidean.threed;
 
 import java.io.Serializable;
 
-import org.apache.commons.math3.ExtendedFieldElement;
+import org.apache.commons.math3.RealFieldElement;
 import org.apache.commons.math3.Field;
 import org.apache.commons.math3.exception.MathArithmeticException;
 import org.apache.commons.math3.exception.MathIllegalArgumentException;
@@ -28,7 +28,7 @@ import org.apache.commons.math3.util.FastMath;
 import org.apache.commons.math3.util.MathArrays;
 
 /**
- * This class is a re-implementation of {@link Rotation} using {@link ExtendedFieldElement}.
+ * This class is a re-implementation of {@link Rotation} using {@link RealFieldElement}.
  * <p>Instance of this class are guaranteed to be immutable.</p>
  *
  * @param <T> the type of the field elements
@@ -38,7 +38,7 @@ import org.apache.commons.math3.util.MathArrays;
  * @since 3.2
  */
 
-public class FieldRotation<T extends ExtendedFieldElement<T>> implements Serializable {
+public class FieldRotation<T extends RealFieldElement<T>> implements Serializable {
 
     /** Serializable version identifier */
     private static final long serialVersionUID = 20130224l;
@@ -425,7 +425,7 @@ public class FieldRotation<T extends ExtendedFieldElement<T>> implements Seriali
 
     /** Get the normalized axis of the rotation.
      * @return normalized axis of the rotation
-     * @see #FieldRotation(FieldVector3D, ExtendedFieldElement)
+     * @see #FieldRotation(FieldVector3D, RealFieldElement)
      */
     public FieldVector3D<T> getAxis() {
         final T squaredSine = q1.multiply(q1).add(q2.multiply(q2)).add(q3.multiply(q3));
@@ -442,7 +442,7 @@ public class FieldRotation<T extends ExtendedFieldElement<T>> implements Seriali
 
     /** Get the angle of the rotation.
      * @return angle of the rotation (between 0 and &pi;)
-     * @see #FieldRotation(FieldVector3D, ExtendedFieldElement)
+     * @see #FieldRotation(FieldVector3D, RealFieldElement)
      */
     public T getAngle() {
         if ((q0.getReal() < -0.1) || (q0.getReal() > 0.1)) {
@@ -834,7 +834,7 @@ public class FieldRotation<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return a new vector which is the image of u by the rotation
      */
-    public static <T extends ExtendedFieldElement<T>> FieldVector3D<T> applyTo(final Rotation r, final FieldVector3D<T> u) {
+    public static <T extends RealFieldElement<T>> FieldVector3D<T> applyTo(final Rotation r, final FieldVector3D<T> u) {
 
         final T x = u.getX();
         final T y = u.getY();
@@ -931,7 +931,7 @@ public class FieldRotation<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return a new vector which such that u is its image by the rotation
      */
-    public static <T extends ExtendedFieldElement<T>> FieldVector3D<T> applyInverseTo(final Rotation r, final FieldVector3D<T> u) {
+    public static <T extends RealFieldElement<T>> FieldVector3D<T> applyInverseTo(final Rotation r, final FieldVector3D<T> u) {
 
         final T x = u.getX();
         final T y = u.getY();
@@ -991,7 +991,7 @@ public class FieldRotation<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return a new rotation which is the composition of r by the instance
      */
-    public static <T extends ExtendedFieldElement<T>> FieldRotation<T> applyTo(final Rotation r1, final FieldRotation<T> rInner) {
+    public static <T extends RealFieldElement<T>> FieldRotation<T> applyTo(final Rotation r1, final FieldRotation<T> rInner) {
         return new FieldRotation<T>(rInner.q0.multiply(r1.getQ0()).subtract(rInner.q1.multiply(r1.getQ1()).add(rInner.q2.multiply(r1.getQ2())).add(rInner.q3.multiply(r1.getQ3()))),
                                     rInner.q1.multiply(r1.getQ0()).add(rInner.q0.multiply(r1.getQ1())).add(rInner.q2.multiply(r1.getQ3()).subtract(rInner.q3.multiply(r1.getQ2()))),
                                     rInner.q2.multiply(r1.getQ0()).add(rInner.q0.multiply(r1.getQ2())).add(rInner.q3.multiply(r1.getQ1()).subtract(rInner.q1.multiply(r1.getQ3()))),
@@ -1050,7 +1050,7 @@ public class FieldRotation<T extends ExtendedFieldElement<T>> implements Seriali
      * @return a new rotation which is the composition of r by the inverse
      * of the instance
      */
-    public static <T extends ExtendedFieldElement<T>> FieldRotation<T> applyInverseTo(final Rotation rOuter, final FieldRotation<T> rInner) {
+    public static <T extends RealFieldElement<T>> FieldRotation<T> applyInverseTo(final Rotation rOuter, final FieldRotation<T> rInner) {
         return new FieldRotation<T>(rInner.q0.multiply(rOuter.getQ0()).add(rInner.q1.multiply(rOuter.getQ1()).add(rInner.q2.multiply(rOuter.getQ2())).add(rInner.q3.multiply(rOuter.getQ3()))).negate(),
                                     rInner.q0.multiply(rOuter.getQ1()).add(rInner.q2.multiply(rOuter.getQ3()).subtract(rInner.q3.multiply(rOuter.getQ2()))).subtract(rInner.q1.multiply(rOuter.getQ0())),
                                     rInner.q0.multiply(rOuter.getQ2()).add(rInner.q3.multiply(rOuter.getQ1()).subtract(rInner.q1.multiply(rOuter.getQ3()))).subtract(rInner.q2.multiply(rOuter.getQ0())),
@@ -1177,7 +1177,7 @@ public class FieldRotation<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return <i>distance</i> between r1 and r2
      */
-    public static <T extends ExtendedFieldElement<T>> T distance(final FieldRotation<T> r1, final FieldRotation<T> r2) {
+    public static <T extends RealFieldElement<T>> T distance(final FieldRotation<T> r1, final FieldRotation<T> r2) {
         return r1.applyInverseTo(r2).getAngle();
     }
 

src/main/java/org/apache/commons/math3/geometry/euclidean/threed/FieldVector3D.java

@@ -20,7 +20,7 @@ package org.apache.commons.math3.geometry.euclidean.threed;
 import java.io.Serializable;
 import java.text.NumberFormat;
 
-import org.apache.commons.math3.ExtendedFieldElement;
+import org.apache.commons.math3.RealFieldElement;
 import org.apache.commons.math3.exception.DimensionMismatchException;
 import org.apache.commons.math3.exception.MathArithmeticException;
 import org.apache.commons.math3.exception.util.LocalizedFormats;
@@ -28,13 +28,13 @@ import org.apache.commons.math3.util.FastMath;
 import org.apache.commons.math3.util.MathArrays;
 
 /**
- * This class is a re-implementation of {@link Vector3D} using {@link ExtendedFieldElement}.
+ * This class is a re-implementation of {@link Vector3D} using {@link RealFieldElement}.
  * <p>Instance of this class are guaranteed to be immutable.</p>
  * @param <T> the type of the field elements
  * @version $Id$
  * @since 3.2
  */
-public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Serializable {
+public class FieldVector3D<T extends RealFieldElement<T>> implements Serializable {
 
     /** Serializable version identifier. */
     private static final long serialVersionUID = 20130224L;
@@ -302,7 +302,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
 
     /** Get the abscissa of the vector.
      * @return abscissa of the vector
-     * @see #FieldVector3D(ExtendedFieldElement, ExtendedFieldElement, ExtendedFieldElement)
+     * @see #FieldVector3D(RealFieldElement, RealFieldElement, RealFieldElement)
      */
     public T getX() {
         return x;
@@ -310,7 +310,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
 
     /** Get the ordinate of the vector.
      * @return ordinate of the vector
-     * @see #FieldVector3D(ExtendedFieldElement, ExtendedFieldElement, ExtendedFieldElement)
+     * @see #FieldVector3D(RealFieldElement, RealFieldElement, RealFieldElement)
      */
     public T getY() {
         return y;
@@ -318,7 +318,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
 
     /** Get the height of the vector.
      * @return height of the vector
-     * @see #FieldVector3D(ExtendedFieldElement, ExtendedFieldElement, ExtendedFieldElement)
+     * @see #FieldVector3D(RealFieldElement, RealFieldElement, RealFieldElement)
      */
     public T getZ() {
         return z;
@@ -326,7 +326,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
 
     /** Get the vector coordinates as a dimension 3 array.
      * @return vector coordinates
-     * @see #FieldVector3D(ExtendedFieldElement[])
+     * @see #FieldVector3D(RealFieldElement[])
      */
     public T[] toArray() {
         final T[] array = MathArrays.buildArray(x.getField(), 3);
@@ -390,7 +390,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
 
     /** Get the azimuth of the vector.
      * @return azimuth (&alpha;) of the vector, between -&pi; and +&pi;
-     * @see #FieldVector3D(ExtendedFieldElement, ExtendedFieldElement)
+     * @see #FieldVector3D(RealFieldElement, RealFieldElement)
      */
     public T getAlpha() {
         return y.atan2(x);
@@ -398,7 +398,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
 
     /** Get the elevation of the vector.
      * @return elevation (&delta;) of the vector, between -&pi;/2 and +&pi;/2
-     * @see #FieldVector3D(ExtendedFieldElement, ExtendedFieldElement)
+     * @see #FieldVector3D(RealFieldElement, RealFieldElement)
      */
     public T getDelta() {
         return z.divide(getNorm()).asin();
@@ -575,7 +575,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @return angular separation between v1 and v2
      * @exception MathArithmeticException if either vector has a null norm
      */
-    public static <T extends ExtendedFieldElement<T>> T angle(final FieldVector3D<T> v1, final FieldVector3D<T> v2)
+    public static <T extends RealFieldElement<T>> T angle(final FieldVector3D<T> v1, final FieldVector3D<T> v2)
         throws MathArithmeticException {
 
         final T normProduct = v1.getNorm().multiply(v2.getNorm());
@@ -611,7 +611,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @return angular separation between v1 and v2
      * @exception MathArithmeticException if either vector has a null norm
      */
-    public static <T extends ExtendedFieldElement<T>> T angle(final FieldVector3D<T> v1, final Vector3D v2)
+    public static <T extends RealFieldElement<T>> T angle(final FieldVector3D<T> v1, final Vector3D v2)
         throws MathArithmeticException {
 
         final T normProduct = v1.getNorm().multiply(v2.getNorm());
@@ -647,7 +647,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @return angular separation between v1 and v2
      * @exception MathArithmeticException if either vector has a null norm
      */
-    public static <T extends ExtendedFieldElement<T>> T angle(final Vector3D v1, final FieldVector3D<T> v2)
+    public static <T extends RealFieldElement<T>> T angle(final Vector3D v1, final FieldVector3D<T> v2)
         throws MathArithmeticException {
         return angle(v2, v1);
     }
@@ -697,7 +697,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * Test for the equality of two 3D vectors.
      * <p>
      * If all coordinates of two 3D vectors are exactly the same, and none of their
-     * {@link ExtendedFieldElement#getReal() real part} are <code>NaN</code>, the
+     * {@link RealFieldElement#getReal() real part} are <code>NaN</code>, the
      * two 3D vectors are considered to be equal.
      * </p>
      * <p>
@@ -937,7 +937,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the dot product v1.v2
      */
-    public static <T extends ExtendedFieldElement<T>> T dotProduct(final FieldVector3D<T> v1,
+    public static <T extends RealFieldElement<T>> T dotProduct(final FieldVector3D<T> v1,
                                                                    final FieldVector3D<T> v2) {
         return v1.dotProduct(v2);
     }
@@ -948,7 +948,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the dot product v1.v2
      */
-    public static <T extends ExtendedFieldElement<T>> T dotProduct(final FieldVector3D<T> v1,
+    public static <T extends RealFieldElement<T>> T dotProduct(final FieldVector3D<T> v1,
                                                                    final Vector3D v2) {
         return v1.dotProduct(v2);
     }
@@ -959,7 +959,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the dot product v1.v2
      */
-    public static <T extends ExtendedFieldElement<T>> T dotProduct(final Vector3D v1,
+    public static <T extends RealFieldElement<T>> T dotProduct(final Vector3D v1,
                                                                    final FieldVector3D<T> v2) {
         return v2.dotProduct(v1);
     }
@@ -970,7 +970,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the cross product v1 ^ v2 as a new Vector
      */
-    public static <T extends ExtendedFieldElement<T>> FieldVector3D<T> crossProduct(final FieldVector3D<T> v1,
+    public static <T extends RealFieldElement<T>> FieldVector3D<T> crossProduct(final FieldVector3D<T> v1,
                                                                                     final FieldVector3D<T> v2) {
         return v1.crossProduct(v2);
     }
@@ -981,7 +981,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the cross product v1 ^ v2 as a new Vector
      */
-    public static <T extends ExtendedFieldElement<T>> FieldVector3D<T> crossProduct(final FieldVector3D<T> v1,
+    public static <T extends RealFieldElement<T>> FieldVector3D<T> crossProduct(final FieldVector3D<T> v1,
                                                                                     final Vector3D v2) {
         return v1.crossProduct(v2);
     }
@@ -992,7 +992,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the cross product v1 ^ v2 as a new Vector
      */
-    public static <T extends ExtendedFieldElement<T>> FieldVector3D<T> crossProduct(final Vector3D v1,
+    public static <T extends RealFieldElement<T>> FieldVector3D<T> crossProduct(final Vector3D v1,
                                                                                     final FieldVector3D<T> v2) {
         return new FieldVector3D<T>(v2.x.linearCombination(v1.getY(), v2.z, -v1.getZ(), v2.y),
                                     v2.y.linearCombination(v1.getZ(), v2.x, -v1.getX(), v2.z),
@@ -1008,7 +1008,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the distance between v1 and v2 according to the L<sub>1</sub> norm
      */
-    public static <T extends ExtendedFieldElement<T>> T distance1(final FieldVector3D<T> v1,
+    public static <T extends RealFieldElement<T>> T distance1(final FieldVector3D<T> v1,
                                                                   final FieldVector3D<T> v2) {
         return v1.distance1(v2);
     }
@@ -1022,7 +1022,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the distance between v1 and v2 according to the L<sub>1</sub> norm
      */
-    public static <T extends ExtendedFieldElement<T>> T distance1(final FieldVector3D<T> v1,
+    public static <T extends RealFieldElement<T>> T distance1(final FieldVector3D<T> v1,
                                                                   final Vector3D v2) {
         return v1.distance1(v2);
     }
@@ -1036,7 +1036,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the distance between v1 and v2 according to the L<sub>1</sub> norm
      */
-    public static <T extends ExtendedFieldElement<T>> T distance1(final Vector3D v1,
+    public static <T extends RealFieldElement<T>> T distance1(final Vector3D v1,
                                                                   final FieldVector3D<T> v2) {
         return v2.distance1(v1);
     }
@@ -1050,7 +1050,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the distance between v1 and v2 according to the L<sub>2</sub> norm
      */
-    public static <T extends ExtendedFieldElement<T>> T distance(final FieldVector3D<T> v1,
+    public static <T extends RealFieldElement<T>> T distance(final FieldVector3D<T> v1,
                                                                  final FieldVector3D<T> v2) {
         return v1.distance(v2);
     }
@@ -1064,7 +1064,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the distance between v1 and v2 according to the L<sub>2</sub> norm
      */
-    public static <T extends ExtendedFieldElement<T>> T distance(final FieldVector3D<T> v1,
+    public static <T extends RealFieldElement<T>> T distance(final FieldVector3D<T> v1,
                                                                  final Vector3D v2) {
         return v1.distance(v2);
     }
@@ -1078,7 +1078,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the distance between v1 and v2 according to the L<sub>2</sub> norm
      */
-    public static <T extends ExtendedFieldElement<T>> T distance(final Vector3D v1,
+    public static <T extends RealFieldElement<T>> T distance(final Vector3D v1,
                                                                  final FieldVector3D<T> v2) {
         return v2.distance(v1);
     }
@@ -1092,7 +1092,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the distance between v1 and v2 according to the L<sub>&infin;</sub> norm
      */
-    public static <T extends ExtendedFieldElement<T>> T distanceInf(final FieldVector3D<T> v1,
+    public static <T extends RealFieldElement<T>> T distanceInf(final FieldVector3D<T> v1,
                                                                     final FieldVector3D<T> v2) {
         return v1.distanceInf(v2);
     }
@@ -1106,7 +1106,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the distance between v1 and v2 according to the L<sub>&infin;</sub> norm
      */
-    public static <T extends ExtendedFieldElement<T>> T distanceInf(final FieldVector3D<T> v1,
+    public static <T extends RealFieldElement<T>> T distanceInf(final FieldVector3D<T> v1,
                                                                     final Vector3D v2) {
         return v1.distanceInf(v2);
     }
@@ -1120,7 +1120,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the distance between v1 and v2 according to the L<sub>&infin;</sub> norm
      */
-    public static <T extends ExtendedFieldElement<T>> T distanceInf(final Vector3D v1,
+    public static <T extends RealFieldElement<T>> T distanceInf(final Vector3D v1,
                                                                     final FieldVector3D<T> v2) {
         return v2.distanceInf(v1);
     }
@@ -1134,7 +1134,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the square of the distance between v1 and v2
      */
-    public static <T extends ExtendedFieldElement<T>> T distanceSq(final FieldVector3D<T> v1,
+    public static <T extends RealFieldElement<T>> T distanceSq(final FieldVector3D<T> v1,
                                                                    final FieldVector3D<T> v2) {
         return v1.distanceSq(v2);
     }
@@ -1148,7 +1148,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the square of the distance between v1 and v2
      */
-    public static <T extends ExtendedFieldElement<T>> T distanceSq(final FieldVector3D<T> v1,
+    public static <T extends RealFieldElement<T>> T distanceSq(final FieldVector3D<T> v1,
                                                                    final Vector3D v2) {
         return v1.distanceSq(v2);
     }
@@ -1162,7 +1162,7 @@ public class FieldVector3D<T extends ExtendedFieldElement<T>> implements Seriali
      * @param <T> the type of the field elements
      * @return the square of the distance between v1 and v2
      */
-    public static <T extends ExtendedFieldElement<T>> T distanceSq(final Vector3D v1,
+    public static <T extends RealFieldElement<T>> T distanceSq(final Vector3D v1,
                                                                    final FieldVector3D<T> v2) {
         return v2.distanceSq(v1);
     }

src/main/java/org/apache/commons/math3/util/Decimal64.java

@@ -16,20 +16,20 @@
  */
 package org.apache.commons.math3.util;
 
-import org.apache.commons.math3.ExtendedFieldElement;
+import org.apache.commons.math3.RealFieldElement;
 import org.apache.commons.math3.Field;
 import org.apache.commons.math3.exception.DimensionMismatchException;
 
 /**
  * This class wraps a {@code double} value in an object. It is similar to the
  * standard class {@link Double}, while also implementing the
- * {@link ExtendedFieldElement} interface.
+ * {@link RealFieldElement} interface.
  *
  * @since 3.1
  * @version $Id$
  */
 public class Decimal64 extends Number
-                       implements ExtendedFieldElement<Decimal64>, Comparable<Decimal64> {
+                       implements RealFieldElement<Decimal64>, Comparable<Decimal64> {
 
     /** The constant value of {@code 0d} as a {@code Decimal64}. */
     public static final Decimal64 ZERO;

src/test/java/org/apache/commons/math3/ExtendedFieldElementAbstractTest.java

@@ -23,7 +23,7 @@ import org.apache.commons.math3.util.MathArrays;
 import org.junit.Assert;
 import org.junit.Test;
 
-public abstract class ExtendedFieldElementAbstractTest<T extends ExtendedFieldElement<T>> {
+public abstract class ExtendedFieldElementAbstractTest<T extends RealFieldElement<T>> {
 
     protected abstract T build(double x);