1 package org.apache.maven.toolchain.building;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.io.PrintWriter;
23 import java.io.StringWriter;
24 import java.util.ArrayList;
25 import java.util.List;
26
27 import org.apache.maven.building.Problem;
28
29 /**
30 * @author Robert Scholte
31 * @since 3.3.0
32 */
33 public class ToolchainsBuildingException
34 extends Exception
35 {
36
37 private final List<Problem> problems;
38
39 /**
40 * Creates a new exception with the specified problems.
41 *
42 * @param problems The problems that causes this exception, must not be {@code null}.
43 */
44 public ToolchainsBuildingException( List<Problem> problems )
45 {
46 super( toMessage( problems ) );
47
48 this.problems = new ArrayList<>();
49 if ( problems != null )
50 {
51 this.problems.addAll( problems );
52 }
53 }
54
55 /**
56 * Gets the problems that caused this exception.
57 *
58 * @return The problems that caused this exception, never {@code null}.
59 */
60 public List<Problem> getProblems()
61 {
62 return problems;
63 }
64
65 private static String toMessage( List<Problem> problems )
66 {
67 StringWriter buffer = new StringWriter( 1024 );
68
69 PrintWriter writer = new PrintWriter( buffer );
70
71 writer.print( problems.size() );
72 writer.print( ( problems.size() == 1 ) ? " problem was " : " problems were " );
73 writer.print( "encountered while building the effective toolchains" );
74 writer.println();
75
76 for ( Problem problem : problems )
77 {
78 writer.print( "[" );
79 writer.print( problem.getSeverity() );
80 writer.print( "] " );
81 writer.print( problem.getMessage() );
82 String location = problem.getLocation();
83 if ( !location.isEmpty() )
84 {
85 writer.print( " @ " );
86 writer.print( location );
87 }
88 writer.println();
89 }
90
91 return buffer.toString();
92 }
93 }