1 /*
2 * Licensed to the Hipparchus project under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The Hipparchus project licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * https://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.hipparchus.analysis;
18
19 import org.hipparchus.Field;
20 import org.hipparchus.CalculusFieldElement;
21
22 /**
23 * An interface representing a bivariate field function.
24 * @since 1.5
25 */
26 public interface FieldBivariateFunction {
27
28 /** Convert to a {@link CalculusFieldBivariateFunction} with a specific type.
29 * @param <T> the type of the field elements
30 * @param field field for the argument and value
31 * @return converted function
32 */
33 default <T extends CalculusFieldElement<T>> CalculusFieldBivariateFunction<T> toCalculusFieldBivariateFunction(Field<T> field) {
34 return this::value;
35 }
36
37 /**
38 * Compute the value for the function.
39 *
40 * @param x Abscissa for which the function value should be computed.
41 * @param y Ordinate for which the function value should be computed.
42 * @param <T> type of the field elements
43 * @return the value.
44 */
45 <T extends CalculusFieldElement<T>> T value(T x, T y);
46
47 }