Fixed compatibility issues.

src/main/java/org/orekit/propagation/numerical/PartialDerivativesEquations.java

@@ -27,6 +27,7 @@ import org.orekit.forces.ForceModel;
 import org.orekit.propagation.FieldSpacecraftState;
 import org.orekit.propagation.SpacecraftState;
 import org.orekit.propagation.integration.AdditionalDerivativesProvider;
+import org.orekit.time.AbsoluteDate;
 import org.orekit.utils.ParameterDriver;
 import org.orekit.utils.ParameterDriversList;
 
@@ -61,7 +62,10 @@ import org.orekit.utils.ParameterDriversList;
  * @author Véronique Pommier-Maurussane
  * @author Luc Maisonobe
  */
-public class PartialDerivativesEquations implements AdditionalDerivativesProvider {
+@SuppressWarnings("deprecation")
+public class PartialDerivativesEquations
+    implements AdditionalDerivativesProvider,
+               org.orekit.propagation.integration.AdditionalEquations {
 
     /** Propagator computing state evolution. */
     private final NumericalPropagator propagator;
@@ -253,6 +257,19 @@ public class PartialDerivativesEquations implements AdditionalDerivativesProvide
                                    propagator.getPositionAngleType());
     }
 
+    /** {@inheritDoc} */
+    public void init(final SpacecraftState initialState, final AbsoluteDate target) {
+        // FIXME: remove in 12.0 when AdditionalEquations is removed
+        AdditionalDerivativesProvider.super.init(initialState, target);
+    }
+
+    /** {@inheritDoc} */
+    public double[] computeDerivatives(final SpacecraftState s, final double[] pDot) {
+        // FIXME: remove in 12.0 when AdditionalEquations is removed
+        System.arraycopy(derivatives(s), 0, pDot, 0, pDot.length);
+        return null;
+    }
+
     /** {@inheritDoc} */
     public double[] derivatives(final SpacecraftState s) {
 

src/main/java/org/orekit/propagation/semianalytical/dsst/DSSTPartialDerivativesEquations.java

@@ -28,6 +28,7 @@ import org.orekit.propagation.SpacecraftState;
 import org.orekit.propagation.integration.AdditionalDerivativesProvider;
 import org.orekit.propagation.semianalytical.dsst.forces.DSSTForceModel;
 import org.orekit.propagation.semianalytical.dsst.utilities.FieldAuxiliaryElements;
+import org.orekit.time.AbsoluteDate;
 import org.orekit.utils.ParameterDriver;
 import org.orekit.utils.ParameterDriversList;
 
@@ -51,7 +52,10 @@ import org.orekit.utils.ParameterDriversList;
  * @author Bryan Cazabonne
  * @since 10.0
  */
-public class DSSTPartialDerivativesEquations implements AdditionalDerivativesProvider {
+@SuppressWarnings("deprecation")
+public class DSSTPartialDerivativesEquations
+    implements AdditionalDerivativesProvider,
+               org.orekit.propagation.integration.AdditionalEquations {
 
     /** Retrograde factor I.
      *  <p>
@@ -246,6 +250,19 @@ public class DSSTPartialDerivativesEquations implements AdditionalDerivativesPro
         return new DSSTJacobiansMapper(name, selected, propagator, map, propagationType);
     }
 
+    /** {@inheritDoc} */
+    public void init(final SpacecraftState initialState, final AbsoluteDate target) {
+        // FIXME: remove in 12.0 when AdditionalEquations is removed
+        AdditionalDerivativesProvider.super.init(initialState, target);
+    }
+
+    /** {@inheritDoc} */
+    public double[] computeDerivatives(final SpacecraftState s, final double[] pDot) {
+        // FIXME: remove in 12.0 when AdditionalEquations is removed
+        System.arraycopy(derivatives(s), 0, pDot, 0, pDot.length);
+        return null;
+    }
+
     /** {@inheritDoc} */
     public double[] derivatives(final SpacecraftState s) {