001package org.apache.maven.toolchain.building; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022import java.io.PrintWriter; 023import java.io.StringWriter; 024import java.util.ArrayList; 025import java.util.List; 026 027import org.apache.maven.building.Problem; 028 029/** 030 * @author Robert Scholte 031 * @since 3.3.0 032 */ 033public class ToolchainsBuildingException 034 extends Exception 035{ 036 037 private final List<Problem> problems; 038 039 /** 040 * Creates a new exception with the specified problems. 041 * 042 * @param problems The problems that causes this exception, must not be {@code null}. 043 */ 044 public ToolchainsBuildingException( List<Problem> problems ) 045 { 046 super( toMessage( problems ) ); 047 048 this.problems = new ArrayList<Problem>(); 049 if ( problems != null ) 050 { 051 this.problems.addAll( problems ); 052 } 053 } 054 055 /** 056 * Gets the problems that caused this exception. 057 * 058 * @return The problems that caused this exception, never {@code null}. 059 */ 060 public List<Problem> getProblems() 061 { 062 return problems; 063 } 064 065 private static String toMessage( List<Problem> problems ) 066 { 067 StringWriter buffer = new StringWriter( 1024 ); 068 069 PrintWriter writer = new PrintWriter( buffer ); 070 071 writer.print( problems.size() ); 072 writer.print( ( problems.size() == 1 ) ? " problem was " : " problems were " ); 073 writer.print( "encountered while building the effective toolchains" ); 074 writer.println(); 075 076 for ( Problem problem : problems ) 077 { 078 writer.print( "[" ); 079 writer.print( problem.getSeverity() ); 080 writer.print( "] " ); 081 writer.print( problem.getMessage() ); 082 String location = problem.getLocation(); 083 if ( !location.isEmpty() ) 084 { 085 writer.print( " @ " ); 086 writer.print( location ); 087 } 088 writer.println(); 089 } 090 091 return buffer.toString(); 092 } 093}