1 /*
2 * Licensed to the Apache Software Foundation (ASF) 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 ASF 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 * http://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.apache.commons.nabla.automatic.analysis;
18
19 import org.apache.commons.nabla.core.DifferentiationException;
20
21 /** Class used for delayed error reporting.
22 */
23 public class ErrorReporter {
24
25 /** Error report. */
26 private DifferentiationException reportedError;
27
28 /** Register an exception to be reported later.
29 * @param exception exception to be reported
30 */
31 public void register(final DifferentiationException exception) {
32 reportedError = exception;
33 }
34
35 /** Check if an error has already been registered.
36 * @return true if an error has already been registered
37 */
38 public boolean hasError() {
39 return reportedError != null;
40 }
41
42 /** Report the error if any.
43 * <p>If not error has been reported (i.e. if {@link #hasError()} returns
44 * <code>false</code>), this method does nothing. Otherwise, it rethrows
45 * the original exception.</p>
46 * @exception DifferentiationException if some error occurred
47 * during differentiation
48 */
49 public void reportErrors() throws DifferentiationException {
50 if (reportedError != null) {
51 throw reportedError;
52 }
53 }
54
55 }