1 /*
2 * Copyright (C) 2023 Alberto Irurueta Carro (alberto@irurueta.com)
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package com.irurueta.numerical.integration;
17
18 import com.irurueta.numerical.EvaluationException;
19
20 /**
21 * Abstract base class for elementary quadrature algorithms used for function integration.
22 */
23 public abstract class Quadrature {
24 /**
25 * Current level of refinement.
26 */
27 protected int n;
28
29 /**
30 * Gets current level of refinement.
31 *
32 * @return current level of refinement.
33 */
34 public int getN() {
35 return n;
36 }
37
38 /**
39 * Returns the value of the integral at the nth stage of refinement.
40 *
41 * @return the value of the integral at the nth stage of refinement.
42 * @throws EvaluationException Raised if something failed during the evaluation.
43 */
44 public abstract double next() throws EvaluationException;
45
46 /**
47 * Gets type of quadrature.
48 *
49 * @return type of quadrature.
50 */
51 public abstract QuadratureType getType();
52 }