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.spi.log.Logger; 039import org.eclipse.aether.spi.log.LoggerFactory; 040import org.eclipse.aether.spi.log.NullLoggerFactory; 041import org.eclipse.aether.transfer.NoRepositoryLayoutException; 042 043/** 044 */ 045@Named 046public final class DefaultRepositoryLayoutProvider 047 implements RepositoryLayoutProvider, Service 048{ 049 050 private Logger logger = NullLoggerFactory.LOGGER; 051 052 private Collection<RepositoryLayoutFactory> factories = new ArrayList<RepositoryLayoutFactory>(); 053 054 public DefaultRepositoryLayoutProvider() 055 { 056 // enables default constructor 057 } 058 059 @Inject 060 DefaultRepositoryLayoutProvider( Set<RepositoryLayoutFactory> layoutFactories, LoggerFactory loggerFactory ) 061 { 062 setLoggerFactory( loggerFactory ); 063 setRepositoryLayoutFactories( layoutFactories ); 064 } 065 066 public void initService( ServiceLocator locator ) 067 { 068 setLoggerFactory( locator.getService( LoggerFactory.class ) ); 069 setRepositoryLayoutFactories( locator.getServices( RepositoryLayoutFactory.class ) ); 070 } 071 072 public DefaultRepositoryLayoutProvider setLoggerFactory( LoggerFactory loggerFactory ) 073 { 074 this.logger = NullLoggerFactory.getSafeLogger( loggerFactory, getClass() ); 075 return this; 076 } 077 078 public DefaultRepositoryLayoutProvider addRepositoryLayoutFactory( RepositoryLayoutFactory factory ) 079 { 080 factories.add( requireNonNull( factory, "layout factory cannot be null" ) ); 081 return this; 082 } 083 084 public DefaultRepositoryLayoutProvider setRepositoryLayoutFactories( Collection<RepositoryLayoutFactory> factories ) 085 { 086 if ( factories == null ) 087 { 088 this.factories = new ArrayList<RepositoryLayoutFactory>(); 089 } 090 else 091 { 092 this.factories = factories; 093 } 094 return this; 095 } 096 097 public RepositoryLayout newRepositoryLayout( RepositorySystemSession session, RemoteRepository repository ) 098 throws NoRepositoryLayoutException 099 { 100 requireNonNull( repository, "remote repository cannot be null" ); 101 102 PrioritizedComponents<RepositoryLayoutFactory> factories = 103 new PrioritizedComponents<RepositoryLayoutFactory>( session ); 104 for ( RepositoryLayoutFactory factory : this.factories ) 105 { 106 factories.add( factory, factory.getPriority() ); 107 } 108 109 List<NoRepositoryLayoutException> errors = new ArrayList<NoRepositoryLayoutException>(); 110 for ( PrioritizedComponent<RepositoryLayoutFactory> factory : factories.getEnabled() ) 111 { 112 try 113 { 114 RepositoryLayout layout = factory.getComponent().newInstance( session, repository ); 115 return layout; 116 } 117 catch ( NoRepositoryLayoutException e ) 118 { 119 // continue and try next factory 120 errors.add( e ); 121 } 122 } 123 if ( logger.isDebugEnabled() && errors.size() > 1 ) 124 { 125 String msg = "Could not obtain layout factory for " + repository; 126 for ( Exception e : errors ) 127 { 128 logger.debug( msg, e ); 129 } 130 } 131 132 StringBuilder buffer = new StringBuilder( 256 ); 133 if ( factories.isEmpty() ) 134 { 135 buffer.append( "No layout factories registered" ); 136 } 137 else 138 { 139 buffer.append( "Cannot access " ).append( repository.getUrl() ); 140 buffer.append( " with type " ).append( repository.getContentType() ); 141 buffer.append( " using the available layout factories: " ); 142 factories.list( buffer ); 143 } 144 145 throw new NoRepositoryLayoutException( repository, buffer.toString(), errors.size() == 1 ? errors.get( 0 ) 146 : null ); 147 } 148 149}