Java tutorial
package org.apache.maven.project; /* * 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 org.apache.maven.model.building.ModelProblem; import org.apache.maven.model.building.ModelProblemUtils; import java.io.File; import java.io.PrintWriter; import java.io.StringWriter; import java.util.List; /** * @author Jason van Zyl */ public class ProjectBuildingException extends Exception { private final String projectId; private File pomFile; private List<ProjectBuildingResult> results; public ProjectBuildingException(String projectId, String message, Throwable cause) { super(createMessage(message, projectId, null), cause); this.projectId = projectId; } /** * @param projectId * @param message * @param pomFile pom file location */ public ProjectBuildingException(String projectId, String message, File pomFile) { super(createMessage(message, projectId, pomFile)); this.projectId = projectId; this.pomFile = pomFile; } /** * @param projectId * @param message * @param pomFile pom file location * @param cause */ protected ProjectBuildingException(String projectId, String message, File pomFile, Throwable cause) { super(createMessage(message, projectId, pomFile), cause); this.projectId = projectId; this.pomFile = pomFile; } public ProjectBuildingException(List<ProjectBuildingResult> results) { super(createMessage(results)); this.projectId = ""; this.results = results; } public File getPomFile() { return pomFile; } /** * @deprecated use {@link #getPomFile()} */ public String getPomLocation() { if (getPomFile() != null) { return getPomFile().getAbsolutePath(); } else { return "null"; } } public String getProjectId() { return projectId; } public List<ProjectBuildingResult> getResults() { return results; } private static String createMessage(String message, String projectId, File pomFile) { StringBuilder buffer = new StringBuilder(256); buffer.append(message); buffer.append(" for project ").append(projectId); if (pomFile != null) { buffer.append(" at ").append(pomFile.getAbsolutePath()); } return buffer.toString(); } private static String createMessage(List<ProjectBuildingResult> results) { StringWriter buffer = new StringWriter(1024); PrintWriter writer = new PrintWriter(buffer); writer.println("Some problems were encountered while processing the POMs:"); try { for (ProjectBuildingResult result : results) { for (ModelProblem problem : result.getProblems()) { writer.print("["); writer.print(problem.getSeverity()); writer.print("] "); writer.print(problem.getMessage()); writer.print(" @ "); writer.println(ModelProblemUtils.formatLocation(problem, result.getProjectId())); } } } finally { writer.close(); } return buffer.toString(); } }