Java tutorial
/* * 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.hyracks.maven.license; import java.io.File; import java.io.IOException; import java.util.Collection; import java.util.Collections; import java.util.List; import java.util.Random; import org.apache.commons.io.FileUtils; import org.apache.hyracks.maven.license.project.LicensedProjects; import org.apache.hyracks.maven.license.project.Project; import org.apache.maven.artifact.Artifact; import org.apache.maven.artifact.DefaultArtifact; import org.apache.maven.artifact.metadata.ArtifactMetadata; import org.apache.maven.artifact.repository.ArtifactRepository; import org.apache.maven.artifact.repository.ArtifactRepositoryPolicy; import org.apache.maven.artifact.repository.Authentication; import org.apache.maven.artifact.repository.DefaultRepositoryRequest; import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout; import org.apache.maven.artifact.repository.layout.DefaultRepositoryLayout; import org.apache.maven.artifact.resolver.ArtifactResolutionRequest; import org.apache.maven.artifact.resolver.ArtifactResolutionResult; import org.apache.maven.project.MavenProject; import org.apache.maven.project.ProjectBuildingException; import org.apache.maven.repository.Proxy; public class SourcePointerResolver { private final GenerateFileMojo mojo; private SourcePointerResolver(GenerateFileMojo mojo) { this.mojo = mojo; } public static void execute(GenerateFileMojo mojo) throws ProjectBuildingException, IOException { SourcePointerResolver instance = new SourcePointerResolver(mojo); instance.collectSourcePointers(); } private ArtifactRepository getCentralRepository() { for (ArtifactRepository repo : mojo.getSession().getRequest().getRemoteRepositories()) { if ("central".equals(repo.getId())) { return repo; } } throw new IllegalStateException("Unable to find 'central' remote repository!"); } private void collectSourcePointers() throws ProjectBuildingException, IOException { try (StubArtifactRepository stubRepo = new StubArtifactRepository()) { DefaultRepositoryRequest rr = new DefaultRepositoryRequest(); rr.setLocalRepository(stubRepo); ArtifactRepository central = getCentralRepository(); rr.setRemoteRepositories(Collections.singletonList(central)); ArtifactResolutionRequest request = new ArtifactResolutionRequest(rr); for (LicensedProjects lp : mojo.getLicenseMap().values()) { if (lp.getLicense().getDisplayName() != null && lp.getLicense().getDisplayName().toLowerCase().contains("cddl")) { ensureCDDLSourcesPointer(lp.getProjects(), central, request); } } } } private void ensureCDDLSourcesPointer(Collection<Project> projects, ArtifactRepository central, ArtifactResolutionRequest request) throws ProjectBuildingException, IOException { for (Project p : projects) { if (p.getSourcePointer() != null) { continue; } mojo.getLog().debug("finding sources for artifact: " + p); Artifact sourcesArtifact = new DefaultArtifact(p.getGroupId(), p.getArtifactId(), p.getVersion(), Artifact.SCOPE_COMPILE, "jar", "sources", null); MavenProject mavenProject = mojo.resolveDependency(sourcesArtifact); sourcesArtifact.setArtifactHandler(mavenProject.getArtifact().getArtifactHandler()); final ArtifactRepository localRepo = mojo.getSession().getLocalRepository(); final File marker = new File(localRepo.getBasedir(), localRepo.pathOf(sourcesArtifact) + ".oncentral"); final File antimarker = new File(localRepo.getBasedir(), localRepo.pathOf(sourcesArtifact) + ".nocentral"); boolean onCentral; if (marker.exists() || antimarker.exists()) { onCentral = marker.exists(); } else { request.setArtifact(sourcesArtifact); ArtifactResolutionResult result = mojo.getArtifactResolver().resolve(request); mojo.getLog().debug("result: " + result); onCentral = result.isSuccess(); if (onCentral) { FileUtils.touch(marker); } else { FileUtils.touch(antimarker); } } StringBuilder noticeBuilder = new StringBuilder("You may obtain "); noticeBuilder.append(p.getName()).append(" in Source Code form code here:\n"); if (onCentral) { noticeBuilder.append(central.getUrl()).append("/").append(central.pathOf(sourcesArtifact)); } else { mojo.getLog().warn("Unable to find sources in 'central' for " + p + ", falling back to project url: " + p.getUrl()); noticeBuilder.append(p.getUrl() != null ? p.getUrl() : "MISSING SOURCE POINTER"); } p.setSourcePointer(noticeBuilder.toString()); } } private static class StubArtifactRepository implements ArtifactRepository, AutoCloseable { private static final Random random = new Random(); private final File tempDir; private final ArtifactRepositoryLayout layout; public StubArtifactRepository() { String tmpDir = System.getProperty("java.io.tmpdir", "/tmp"); this.tempDir = new File(tmpDir, "repo" + random.nextInt()); this.layout = new DefaultRepositoryLayout(); } @java.lang.Override public ArtifactRepositoryLayout getLayout() { return layout; } @java.lang.Override public String pathOf(Artifact artifact) { return this.layout.pathOf(artifact); } @java.lang.Override public String getBasedir() { return tempDir.toString(); } @java.lang.Override public void close() throws IOException { FileUtils.deleteDirectory(tempDir); } @java.lang.Override public String pathOfRemoteRepositoryMetadata(ArtifactMetadata artifactMetadata) { return null; } @java.lang.Override public String pathOfLocalRepositoryMetadata(ArtifactMetadata artifactMetadata, ArtifactRepository artifactRepository) { return null; } @java.lang.Override public String getUrl() { return null; } @java.lang.Override public void setUrl(String s) { // unused } @java.lang.Override public String getProtocol() { return null; } @java.lang.Override public String getId() { return "stub"; } @java.lang.Override public void setId(String s) { // unused } @java.lang.Override public ArtifactRepositoryPolicy getSnapshots() { return null; } @java.lang.Override public void setSnapshotUpdatePolicy(ArtifactRepositoryPolicy artifactRepositoryPolicy) { // unused } @java.lang.Override public ArtifactRepositoryPolicy getReleases() { return null; } @java.lang.Override public void setReleaseUpdatePolicy(ArtifactRepositoryPolicy artifactRepositoryPolicy) { // unused } @java.lang.Override public void setLayout(ArtifactRepositoryLayout artifactRepositoryLayout) { // unused } @java.lang.Override public String getKey() { return null; } @java.lang.Override public boolean isUniqueVersion() { return false; } @java.lang.Override public boolean isBlacklisted() { return false; } @java.lang.Override public void setBlacklisted(boolean b) { // unused } @java.lang.Override public Artifact find(Artifact artifact) { return null; } @java.lang.Override public List<String> findVersions(Artifact artifact) { return Collections.emptyList(); } @java.lang.Override public boolean isProjectAware() { return false; } @java.lang.Override public void setAuthentication(Authentication authentication) { // unused } @java.lang.Override public Authentication getAuthentication() { return null; } @java.lang.Override public void setProxy(Proxy proxy) { // unused } @java.lang.Override public Proxy getProxy() { return null; } } }