core/bootstrap/src/main/java/org/apache/polygene/bootstrap/AssemblyReportException.java

/*
 *  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.
 *
 *
 */
package org.apache.polygene.bootstrap;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * Thrown when one or more assembly problems has occurred.
 */
public class AssemblyReportException extends AssemblyException
{
    private Set<Throwable> problems;
    private String modelReport;

    public AssemblyReportException( Set<Throwable> problems )
    {
        this.problems = problems;
    }

    @Override
    public String getMessage()
    {
        String message;
        if( modelReport == null )
        {
            message = "\nComposition Problems Report:\n";
        }
        else
        {
            message = modelReport;
        }
        return message + problems.stream()
                                 .map( this::composeMessage )
                                 .map( m -> m + "\n--\n" )
                                 .collect( Collectors.joining() );
    }

    public void attacheModelReport( String modelReport )
    {
        this.modelReport = modelReport;
    }

    private String composeMessage( Throwable exception )
    {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        PrintStream ps = new PrintStream( baos );
        if( Boolean.getBoolean( "polygene.report.exceptions" ) )
        {
            exception.printStackTrace( ps );
        }
        else
        {
            StringBuilder indent = new StringBuilder();
            while( exception != null )
            {
                indent = indent.append( "  " );
                ps.println( indent.toString() + exception.getMessage() );
                ps.println( "---" );
                exception = exception.getCause();
            }
        }
        return baos.toString();
    }
}