Java tutorial
package org.apache.maven.exception; /* * 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.util.Collections; import java.util.List; /** * Provide a summary of the exception, containing:<ul> * <li>the exception itself,</li> * <li>useful end-user message,</li> * <li>useful reference to a solution, or set of solutions: this is usually a wiki page url in * <a href="http://cwiki.apache.org/confluence/display/MAVEN/">http://cwiki.apache.org/confluence/display/MAVEN/</a>, * </li> * <li>child exception summaries.</li> * </ul> */ public class ExceptionSummary { private Throwable exception; private String message; private String reference; private List<ExceptionSummary> children; public ExceptionSummary(Throwable exception, String message, String reference) { this(exception, message, reference, null); } public ExceptionSummary(Throwable exception, String message, String reference, List<ExceptionSummary> children) { this.exception = exception; this.message = (message != null) ? message : ""; this.reference = (reference != null) ? reference : ""; this.children = (children != null) ? Collections.unmodifiableList(children) : Collections.<ExceptionSummary>emptyList(); } public Throwable getException() { return exception; } public String getMessage() { return message; } public String getReference() { return reference; } public List<ExceptionSummary> getChildren() { return children; } }