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.integration.gauss;
18
19 import org.hipparchus.FieldElement;
20 import org.hipparchus.exception.MathIllegalArgumentException;
21 import org.hipparchus.util.Pair;
22
23 /** Interface for rules that determines the integration nodes and their weights.
24 * @param <T> Type of the number used to represent the points and weights of
25 * the quadrature rules.
26 * @since 2.0
27 */
28 public interface FieldRuleFactory<T extends FieldElement<T>> {
29
30 /**
31 * Gets a copy of the quadrature rule with the given number of integration
32 * points.
33 * The number of points is arbitrarily limited to 1000. It prevents resources
34 * exhaustion. In practice the number of points is often much lower.
35 *
36 * @param numberOfPoints Number of integration points.
37 * @return a copy of the integration rule.
38 * @throws MathIllegalArgumentException if {@code numberOfPoints < 1}.
39 * @throws MathIllegalArgumentException if {@code numberOfPoints > 1000}.
40 * @throws MathIllegalArgumentException if the elements of the rule pair do not
41 * have the same length.
42 */
43 Pair<T[], T[]> getRule(int numberOfPoints) throws MathIllegalArgumentException;
44
45 }