Add some FunctionalInterface tags (#448)

Serrof · web-flow · commit 0c8dd87918ea · 2026-01-25T15:29:31.000+01:00
diff --git a/hipparchus-core/src/changes/changes.xml b/hipparchus-core/src/changes/changes.xml
@@ -50,6 +50,12 @@ If the output is not quite correct, check for invisible trailing spaces!
   </properties>
   <body>
     <release version="4.1" date="TBD" description="TBD">
+      <action dev="serrof" type="update">
+        Add some FunctionalInterface tag.
+      </action>
+      <action dev="serrof" type="add" issue="issues/446">
+        Add convergence checker provider for Fielded scalar.
+      </action>
       <action dev="axkr" type="add" issue="issues/442">
         Added Complex Schur transformer
       </action>
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/BivariateFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/BivariateFunction.java
@@ -26,6 +26,7 @@
  * An interface representing a bivariate real function.
  *
  */
+@FunctionalInterface
 public interface BivariateFunction {
     /**
      * Compute the value for the function.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldBivariateFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldBivariateFunction.java
@@ -23,6 +23,7 @@
  * @param <T> type of the field elements
  * @since 1.5
  */
+@FunctionalInterface
 public interface CalculusFieldBivariateFunction<T extends CalculusFieldElement<T>> {
 
     /**
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldMultivariateFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldMultivariateFunction.java
@@ -24,6 +24,7 @@
  * @see MultivariateFunction
  * @since 2.2
  */
+@FunctionalInterface
 public interface CalculusFieldMultivariateFunction<T extends CalculusFieldElement<T>> {
     /**
      * Compute the value of the function.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldMultivariateMatrixFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldMultivariateMatrixFunction.java
@@ -24,6 +24,7 @@
  * @see MultivariateMatrixFunction
  * @since 2.2
  */
+@FunctionalInterface
 public interface CalculusFieldMultivariateMatrixFunction<T extends CalculusFieldElement<T>> {
     /**
      * Compute the value of the function.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldMultivariateVectorFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldMultivariateVectorFunction.java
@@ -24,6 +24,7 @@
  * @see MultivariateVectorFunction
  * @since 2.2
  */
+@FunctionalInterface
 public interface CalculusFieldMultivariateVectorFunction<T extends CalculusFieldElement<T>> {
     /**
      * Compute the value of the function.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldUnivariateFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldUnivariateFunction.java
@@ -74,6 +74,7 @@
  * @see UnivariateFunction
  * @see FieldUnivariateFunction
  */
+@FunctionalInterface
 public interface CalculusFieldUnivariateFunction<T extends CalculusFieldElement<T>> {
     /**
      * Compute the value of the function.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldUnivariateMatrixFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldUnivariateMatrixFunction.java
@@ -24,6 +24,7 @@
  * @param <T> the type of the field elements
  * @since 1.3
  */
+@FunctionalInterface
 public interface CalculusFieldUnivariateMatrixFunction<T extends CalculusFieldElement<T>> {
 
     /**
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldUnivariateVectorFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/CalculusFieldUnivariateVectorFunction.java
@@ -24,6 +24,7 @@
      * @param <T> the type of the field elements
  * @since 1.3
  */
+@FunctionalInterface
 public interface CalculusFieldUnivariateVectorFunction<T extends CalculusFieldElement<T>>  {
 
     /**
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldBivariateFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldBivariateFunction.java
@@ -23,6 +23,7 @@
  * An interface representing a bivariate field function.
  * @since 1.5
  */
+@FunctionalInterface
 public interface FieldBivariateFunction {
 
     /** Convert to a {@link CalculusFieldBivariateFunction} with a specific type.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldMultivariateFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldMultivariateFunction.java
@@ -24,6 +24,7 @@
  * @see MultivariateFunction
  * @since 2.2
  */
+@FunctionalInterface
 public interface FieldMultivariateFunction {
 
     /** Convert to a {@link CalculusFieldMultivariateFunction} with a specific type.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldMultivariateMatrixFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldMultivariateMatrixFunction.java
@@ -24,6 +24,7 @@
  * @see MultivariateMatrixFunction
  * @since 2.2
  */
+@FunctionalInterface
 public interface FieldMultivariateMatrixFunction {
 
     /** Convert to a {@link CalculusFieldMultivariateMatrixFunction} with a specific type.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldMultivariateVectorFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldMultivariateVectorFunction.java
@@ -24,6 +24,7 @@
  * @see MultivariateVectorFunction
  * @since 2.2
  */
+@FunctionalInterface
 public interface FieldMultivariateVectorFunction {
 
     /** Convert to a {@link CalculusFieldMultivariateVectorFunction} with a specific type.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldUnivariateFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldUnivariateFunction.java
@@ -29,6 +29,7 @@
  * @see CalculusFieldUnivariateFunction
  * @since 1.3
  */
+@FunctionalInterface
 public interface FieldUnivariateFunction {
 
     /** Convert to a {@link CalculusFieldUnivariateFunction} with a specific type.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldUnivariateMatrixFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldUnivariateMatrixFunction.java
@@ -24,6 +24,7 @@
  *
  * @since 1.3
  */
+@FunctionalInterface
 public interface FieldUnivariateMatrixFunction {
 
     /** Convert to a {@link CalculusFieldUnivariateMatrixFunction} with a specific type.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldUnivariateVectorFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/FieldUnivariateVectorFunction.java
@@ -24,6 +24,7 @@
  *
  * @since 1.3
  */
+@FunctionalInterface
 public interface FieldUnivariateVectorFunction {
 
     /** Convert to a {@link CalculusFieldUnivariateVectorFunction} with a specific type.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/MultivariateFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/MultivariateFunction.java
@@ -26,6 +26,7 @@
  * An interface representing a multivariate real function.
  *
  */
+@FunctionalInterface
 public interface MultivariateFunction {
 
     /**
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/MultivariateMatrixFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/MultivariateMatrixFunction.java
@@ -25,6 +25,7 @@
 /**
  * An interface representing a multivariate matrix function.
  */
+@FunctionalInterface
 public interface MultivariateMatrixFunction {
 
     /**
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/MultivariateVectorFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/MultivariateVectorFunction.java
@@ -25,6 +25,7 @@
 /**
  * An interface representing a multivariate vectorial function.
  */
+@FunctionalInterface
 public interface MultivariateVectorFunction {
 
     /**
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/TrivariateFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/TrivariateFunction.java
@@ -26,6 +26,7 @@
  * An interface representing a trivariate real function.
  *
  */
+@FunctionalInterface
 public interface TrivariateFunction {
     /**
      * Compute the value for the function.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/UnivariateFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/UnivariateFunction.java
@@ -69,6 +69,7 @@
  * that Hipparchus will not catch it.
  *
  */
+@FunctionalInterface
 public interface UnivariateFunction {
     /**
      * Compute the value of the function.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/UnivariateMatrixFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/UnivariateMatrixFunction.java
@@ -25,6 +25,7 @@
  * An interface representing a univariate matrix function.
  *
  */
+@FunctionalInterface
 public interface UnivariateMatrixFunction {
 
     /**
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/UnivariateVectorFunction.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/UnivariateVectorFunction.java
@@ -25,6 +25,7 @@
  * An interface representing a univariate vectorial function.
  *
  */
+@FunctionalInterface
 public interface UnivariateVectorFunction {
 
     /**
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/integration/gauss/RuleFactory.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/integration/gauss/RuleFactory.java
@@ -22,6 +22,7 @@
 /** Interface for rules that determines the integration nodes and their weights.
  * @since 2.0
  */
+@FunctionalInterface
 public interface RuleFactory {
 
     /**
diff --git a/hipparchus-core/src/main/java/org/hipparchus/analysis/interpolation/MultivariateInterpolator.java b/hipparchus-core/src/main/java/org/hipparchus/analysis/interpolation/MultivariateInterpolator.java
@@ -29,6 +29,7 @@
  * Interface representing a univariate real interpolating function.
  *
  */
+@FunctionalInterface
 public interface MultivariateInterpolator {
 
     /**
diff --git a/hipparchus-core/src/main/java/org/hipparchus/linear/MatrixDecomposer.java b/hipparchus-core/src/main/java/org/hipparchus/linear/MatrixDecomposer.java
@@ -22,6 +22,7 @@
 /** Interface for all algorithms providing matrix decomposition.
  * @since 1.3
  */
+@FunctionalInterface
 public interface MatrixDecomposer {
 
     /**
diff --git a/hipparchus-core/src/main/java/org/hipparchus/random/RandomVectorGenerator.java b/hipparchus-core/src/main/java/org/hipparchus/random/RandomVectorGenerator.java
@@ -26,6 +26,7 @@
 /**
  * This interface represents a random generator for whole vectors.
  */
+@FunctionalInterface
 public interface RandomVectorGenerator {
 
     /** Generate a random vector.
diff --git a/hipparchus-core/src/main/java/org/hipparchus/util/Blendable.java b/hipparchus-core/src/main/java/org/hipparchus/util/Blendable.java
@@ -25,6 +25,7 @@
  *
  * @param <B> blendable class
  */
+@FunctionalInterface
 public interface Blendable<B> {
 
     /**
diff --git a/hipparchus-core/src/main/java/org/hipparchus/util/FieldBlendable.java b/hipparchus-core/src/main/java/org/hipparchus/util/FieldBlendable.java
@@ -27,6 +27,7 @@
  * @param <B> blendable class
  * @param <T> type of the field element
  */
+@FunctionalInterface
 public interface FieldBlendable<B, T extends FieldElement<T>> {
 
     /**
diff --git a/hipparchus-core/src/main/java/org/hipparchus/util/Incrementor.java b/hipparchus-core/src/main/java/org/hipparchus/util/Incrementor.java
@@ -52,6 +52,7 @@ public class Incrementor {
      * Defines a method to be called at counter exhaustion.
      * The {@link #trigger(int) trigger} method should usually throw an exception.
      */
+    @FunctionalInterface
     public interface MaxCountExceededCallback {
         /**
          * Function called when the maximal count has been reached.
diff --git a/hipparchus-optim/src/main/java/org/hipparchus/optim/FieldScalarConvergenceCheckerProvider.java b/hipparchus-optim/src/main/java/org/hipparchus/optim/FieldScalarConvergenceCheckerProvider.java
@@ -15,11 +15,6 @@
  * limitations under the License.
  */
 
-/*
- * This is not the original file distributed by the Apache Software Foundation
- * It has been modified by the Hipparchus project
- */
-
 package org.hipparchus.optim;
 
 import org.hipparchus.CalculusFieldElement;
@@ -31,12 +26,14 @@
  * @see ConvergenceChecker
  * @since 4.1
  */
+@FunctionalInterface
 public interface FieldScalarConvergenceCheckerProvider {
 
     /**
      * Method returning a checker for given field.
      *
      * @param field calculus field
+     * @param <T> field type
      * @return convergence checker for input field
      */
     <T extends CalculusFieldElement<T>> ConvergenceChecker<T> getChecker(Field<T> field);
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
@@ -50,12 +50,18 @@ If the output is not quite correct, check for invisible trailing spaces!
   </properties>
   <body>
     <release version="4.1" date="TBD" description="TBD">
-      <action dev="serror" type="add" issue="issues/446">
+      <action dev="serrof" type="update">
+        Add some FunctionalInterface tag.
+      </action>
+      <action dev="serrof" type="add" issue="issues/446">
         Add convergence checker provider for Fielded scalar.
       </action>
       <action dev="axkr" type="add" issue="issues/442">
         Added Complex Schur transformer
       </action>
+      <action dev="krys06" type="add" issue="issues/437">
+        Added trilinear interpolation
+      </action>
       <action dev="luc" type="add" issue="issues/439">
         Added Field.isSmall to help convergence checks in Field iterative algorithms.
       </action>

Original file line number	Diff line number	Diff line change
`@@ -26,6 +26,7 @@`
`26`	`26`	`* An interface representing a bivariate real function.`
`27`	`27`	`*`
`28`	`28`	`*/`
	`29`	`+@FunctionalInterface`
`29`	`30`	`public interface BivariateFunction {`
`30`	`31`	`/**`
`31`	`32`	`* Compute the value for the function.`