1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.maven.toolchain.building;
20
21 import java.io.PrintWriter;
22 import java.io.StringWriter;
23 import java.util.ArrayList;
24 import java.util.List;
25
26 import org.apache.maven.building.Problem;
27
28 /**
29 * @since 3.3.0
30 */
31 public class ToolchainsBuildingException extends Exception {
32
33 private final List<Problem> problems;
34
35 /**
36 * Creates a new exception with the specified problems.
37 *
38 * @param problems The problems that cause this exception, must not be {@code null}.
39 */
40 public ToolchainsBuildingException(List<Problem> problems) {
41 super(toMessage(problems));
42
43 this.problems = new ArrayList<>();
44 if (problems != null) {
45 this.problems.addAll(problems);
46 }
47 }
48
49 /**
50 * Gets the problems that caused this exception.
51 *
52 * @return The problems that caused this exception, never {@code null}.
53 */
54 public List<Problem> getProblems() {
55 return problems;
56 }
57
58 private static String toMessage(List<Problem> problems) {
59 StringWriter buffer = new StringWriter(1024);
60
61 PrintWriter writer = new PrintWriter(buffer);
62
63 writer.print(problems.size());
64 writer.print((problems.size() == 1) ? " problem was " : " problems were ");
65 writer.print("encountered while building the effective toolchains");
66 writer.println();
67
68 for (Problem problem : problems) {
69 writer.print("[");
70 writer.print(problem.getSeverity());
71 writer.print("] ");
72 writer.print(problem.getMessage());
73 String location = problem.getLocation();
74 if (!location.isEmpty()) {
75 writer.print(" @ ");
76 writer.print(location);
77 }
78 writer.println();
79 }
80
81 return buffer.toString();
82 }
83 }