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package org.apache.maven.settings.building;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
/**
* Signals one ore more errors during settings building. The settings builder tries to collect as many problems as
* possible before eventually failing to provide callers with rich error information. Use {@link #getProblems()} to
* query the details of the failure.
*
* @author Benjamin Bentmann
*/
public class SettingsBuildingException
extends Exception
{
private final List<SettingsProblem> problems;
/**
* Creates a new exception with the specified problems.
*
* @param problems The problems that causes this exception, may be {@code null}.
*/
public SettingsBuildingException( List<SettingsProblem> problems )
{
super( toMessage( problems ) );
this.problems = new ArrayList<SettingsProblem>();
if ( problems != null )
{
this.problems.addAll( problems );
}
}
/**
* Gets the problems that caused this exception.
*
* @return The problems that caused this exception, never {@code null}.
*/
public List<SettingsProblem> getProblems()
{
return problems;
}
private static String toMessage( List<SettingsProblem> problems )
{
StringWriter buffer = new StringWriter( 1024 );
PrintWriter writer = new PrintWriter( buffer );
writer.print( problems.size() );
writer.print( ( problems.size() == 1 ) ? " problem was " : " problems were " );
writer.print( "encountered while building the effective settings" );
writer.println();
for ( SettingsProblem problem : problems )
{
writer.print( "[" );
writer.print( problem.getSeverity() );
writer.print( "] " );
writer.print( problem.getMessage() );
writer.print( " @ " );
writer.println( problem.getLocation() );
}
return buffer.toString();
}
}
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