001package org.eclipse.aether.internal.impl; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022import java.util.ArrayList; 023import java.util.Collection; 024import java.util.List; 025import static java.util.Objects.requireNonNull; 026import java.util.Set; 027 028import javax.inject.Inject; 029import javax.inject.Named; 030 031import org.eclipse.aether.RepositorySystemSession; 032import org.eclipse.aether.repository.RemoteRepository; 033import org.eclipse.aether.spi.connector.layout.RepositoryLayout; 034import org.eclipse.aether.spi.connector.layout.RepositoryLayoutFactory; 035import org.eclipse.aether.spi.connector.layout.RepositoryLayoutProvider; 036import org.eclipse.aether.spi.locator.Service; 037import org.eclipse.aether.spi.locator.ServiceLocator; 038import org.eclipse.aether.transfer.NoRepositoryLayoutException; 039import org.slf4j.Logger; 040import org.slf4j.LoggerFactory; 041 042/** 043 */ 044@Named 045public final class DefaultRepositoryLayoutProvider 046 implements RepositoryLayoutProvider, Service 047{ 048 049 private static final Logger LOGGER = LoggerFactory.getLogger( DefaultRepositoryLayoutProvider.class ); 050 051 private Collection<RepositoryLayoutFactory> factories = new ArrayList<>(); 052 053 public DefaultRepositoryLayoutProvider() 054 { 055 // enables default constructor 056 } 057 058 @Inject 059 DefaultRepositoryLayoutProvider( Set<RepositoryLayoutFactory> layoutFactories ) 060 { 061 setRepositoryLayoutFactories( layoutFactories ); 062 } 063 064 public void initService( ServiceLocator locator ) 065 { 066 setRepositoryLayoutFactories( locator.getServices( RepositoryLayoutFactory.class ) ); 067 } 068 069 public DefaultRepositoryLayoutProvider addRepositoryLayoutFactory( RepositoryLayoutFactory factory ) 070 { 071 factories.add( requireNonNull( factory, "layout factory cannot be null" ) ); 072 return this; 073 } 074 075 public DefaultRepositoryLayoutProvider setRepositoryLayoutFactories( Collection<RepositoryLayoutFactory> factories ) 076 { 077 if ( factories == null ) 078 { 079 this.factories = new ArrayList<>(); 080 } 081 else 082 { 083 this.factories = factories; 084 } 085 return this; 086 } 087 088 public RepositoryLayout newRepositoryLayout( RepositorySystemSession session, RemoteRepository repository ) 089 throws NoRepositoryLayoutException 090 { 091 requireNonNull( repository, "remote repository cannot be null" ); 092 093 PrioritizedComponents<RepositoryLayoutFactory> factories = new PrioritizedComponents<>( session ); 094 for ( RepositoryLayoutFactory factory : this.factories ) 095 { 096 factories.add( factory, factory.getPriority() ); 097 } 098 099 List<NoRepositoryLayoutException> errors = new ArrayList<>(); 100 for ( PrioritizedComponent<RepositoryLayoutFactory> factory : factories.getEnabled() ) 101 { 102 try 103 { 104 return factory.getComponent().newInstance( session, repository ); 105 } 106 catch ( NoRepositoryLayoutException e ) 107 { 108 // continue and try next factory 109 errors.add( e ); 110 } 111 } 112 if ( LOGGER.isDebugEnabled() && errors.size() > 1 ) 113 { 114 for ( Exception e : errors ) 115 { 116 LOGGER.debug( "Could not obtain layout factory for {}", repository, e ); 117 } 118 } 119 120 StringBuilder buffer = new StringBuilder( 256 ); 121 if ( factories.isEmpty() ) 122 { 123 buffer.append( "No layout factories registered" ); 124 } 125 else 126 { 127 buffer.append( "Cannot access " ).append( repository.getUrl() ); 128 buffer.append( " with type " ).append( repository.getContentType() ); 129 buffer.append( " using the available layout factories: " ); 130 factories.list( buffer ); 131 } 132 133 throw new NoRepositoryLayoutException( repository, buffer.toString(), errors.size() == 1 ? errors.get( 0 ) 134 : null ); 135 } 136 137}