| package org.eclipse.aether.util.repository; |
| |
| /* |
| * 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.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.eclipse.aether.repository.MirrorSelector; |
| import org.eclipse.aether.repository.RemoteRepository; |
| |
| /** |
| * A simple mirror selector that selects mirrors based on repository identifiers. |
| */ |
| public final class DefaultMirrorSelector |
| implements MirrorSelector |
| { |
| |
| private static final String WILDCARD = "*"; |
| |
| private static final String EXTERNAL_WILDCARD = "external:*"; |
| |
| private final List<MirrorDef> mirrors = new ArrayList<>(); |
| |
| /** |
| * Adds the specified mirror to this selector. |
| * |
| * @param id The identifier of the mirror, must not be {@code null}. |
| * @param url The URL of the mirror, must not be {@code null}. |
| * @param type The content type of the mirror, must not be {@code null}. |
| * @param repositoryManager A flag whether the mirror is a repository manager or a simple server. |
| * @param mirrorOfIds The identifier(s) of remote repositories to mirror, must not be {@code null}. Multiple |
| * identifiers can be separated by comma and additionally the wildcards "*" and "external:*" can be used |
| * to match all (external) repositories, prefixing a repo id with an exclamation mark allows to express |
| * an exclusion. For example "external:*,!central". |
| * @param mirrorOfTypes The content type(s) of remote repositories to mirror, may be {@code null} or empty to match |
| * any content type. Similar to the repo id specification, multiple types can be comma-separated, the |
| * wildcard "*" and the "!" negation syntax are supported. For example "*,!p2". |
| * @return This selector for chaining, never {@code null}. |
| */ |
| public DefaultMirrorSelector add( String id, String url, String type, boolean repositoryManager, |
| String mirrorOfIds, String mirrorOfTypes ) |
| { |
| mirrors.add( new MirrorDef( id, url, type, repositoryManager, mirrorOfIds, mirrorOfTypes ) ); |
| |
| return this; |
| } |
| |
| public RemoteRepository getMirror( RemoteRepository repository ) |
| { |
| MirrorDef mirror = findMirror( repository ); |
| |
| if ( mirror == null ) |
| { |
| return null; |
| } |
| |
| RemoteRepository.Builder builder = |
| new RemoteRepository.Builder( mirror.id, repository.getContentType(), mirror.url ); |
| |
| builder.setRepositoryManager( mirror.repositoryManager ); |
| |
| if ( mirror.type != null && mirror.type.length() > 0 ) |
| { |
| builder.setContentType( mirror.type ); |
| } |
| |
| builder.setSnapshotPolicy( repository.getPolicy( true ) ); |
| builder.setReleasePolicy( repository.getPolicy( false ) ); |
| |
| builder.setMirroredRepositories( Collections.singletonList( repository ) ); |
| |
| return builder.build(); |
| } |
| |
| private MirrorDef findMirror( RemoteRepository repository ) |
| { |
| String repoId = repository.getId(); |
| |
| if ( repoId != null && !mirrors.isEmpty() ) |
| { |
| for ( MirrorDef mirror : mirrors ) |
| { |
| if ( repoId.equals( mirror.mirrorOfIds ) && matchesType( repository.getContentType(), |
| mirror.mirrorOfTypes ) ) |
| { |
| return mirror; |
| } |
| } |
| |
| for ( MirrorDef mirror : mirrors ) |
| { |
| if ( matchPattern( repository, mirror.mirrorOfIds ) && matchesType( repository.getContentType(), |
| mirror.mirrorOfTypes ) ) |
| { |
| return mirror; |
| } |
| } |
| } |
| |
| return null; |
| } |
| |
| /** |
| * This method checks if the pattern matches the originalRepository. Valid patterns: * = everything external:* = |
| * everything not on the localhost and not file based. repo,repo1 = repo or repo1 *,!repo1 = everything except repo1 |
| * |
| * @param repository to compare for a match. |
| * @param pattern used for match. Currently only '*' is supported. |
| * @return true if the repository is a match to this pattern. |
| */ |
| static boolean matchPattern( RemoteRepository repository, String pattern ) |
| { |
| boolean result = false; |
| String originalId = repository.getId(); |
| |
| // simple checks first to short circuit processing below. |
| if ( WILDCARD.equals( pattern ) || pattern.equals( originalId ) ) |
| { |
| result = true; |
| } |
| else |
| { |
| // process the list |
| String[] repos = pattern.split( "," ); |
| for ( String repo : repos ) |
| { |
| // see if this is a negative match |
| if ( repo.length() > 1 && repo.startsWith( "!" ) ) |
| { |
| if ( repo.substring( 1 ).equals( originalId ) ) |
| { |
| // explicitly exclude. Set result and stop processing. |
| result = false; |
| break; |
| } |
| } |
| // check for exact match |
| else if ( repo.equals( originalId ) ) |
| { |
| result = true; |
| break; |
| } |
| // check for external:* |
| else if ( EXTERNAL_WILDCARD.equals( repo ) && isExternalRepo( repository ) ) |
| { |
| result = true; |
| // don't stop processing in case a future segment explicitly excludes this repo |
| } |
| else if ( WILDCARD.equals( repo ) ) |
| { |
| result = true; |
| // don't stop processing in case a future segment explicitly excludes this repo |
| } |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * Checks the URL to see if this repository refers to an external repository. |
| * |
| * @param repository The repository to check, must not be {@code null}. |
| * @return {@code true} if external, {@code false} otherwise. |
| */ |
| static boolean isExternalRepo( RemoteRepository repository ) |
| { |
| boolean local = |
| "localhost".equals( repository.getHost() ) || "127.0.0.1".equals( repository.getHost() ) |
| || "file".equalsIgnoreCase( repository.getProtocol() ); |
| return !local; |
| } |
| |
| /** |
| * Checks whether the types configured for a mirror match with the type of the repository. |
| * |
| * @param repoType The type of the repository, may be {@code null}. |
| * @param mirrorType The types supported by the mirror, may be {@code null}. |
| * @return {@code true} if the types associated with the mirror match the type of the original repository, |
| * {@code false} otherwise. |
| */ |
| static boolean matchesType( String repoType, String mirrorType ) |
| { |
| boolean result = false; |
| |
| // simple checks first to short circuit processing below. |
| if ( mirrorType == null || mirrorType.length() <= 0 || WILDCARD.equals( mirrorType ) ) |
| { |
| result = true; |
| } |
| else if ( mirrorType.equals( repoType ) ) |
| { |
| result = true; |
| } |
| else |
| { |
| // process the list |
| String[] layouts = mirrorType.split( "," ); |
| for ( String layout : layouts ) |
| { |
| // see if this is a negative match |
| if ( layout.length() > 1 && layout.startsWith( "!" ) ) |
| { |
| if ( layout.substring( 1 ).equals( repoType ) ) |
| { |
| // explicitly exclude. Set result and stop processing. |
| result = false; |
| break; |
| } |
| } |
| // check for exact match |
| else if ( layout.equals( repoType ) ) |
| { |
| result = true; |
| break; |
| } |
| else if ( WILDCARD.equals( layout ) ) |
| { |
| result = true; |
| // don't stop processing in case a future segment explicitly excludes this repo |
| } |
| } |
| } |
| |
| return result; |
| } |
| |
| static class MirrorDef |
| { |
| |
| final String id; |
| |
| final String url; |
| |
| final String type; |
| |
| final boolean repositoryManager; |
| |
| final String mirrorOfIds; |
| |
| final String mirrorOfTypes; |
| |
| MirrorDef( String id, String url, String type, boolean repositoryManager, String mirrorOfIds, |
| String mirrorOfTypes ) |
| { |
| this.id = id; |
| this.url = url; |
| this.type = type; |
| this.repositoryManager = repositoryManager; |
| this.mirrorOfIds = mirrorOfIds; |
| this.mirrorOfTypes = mirrorOfTypes; |
| } |
| |
| } |
| |
| } |
