1 package org.eclipse.aether.internal.impl;
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22 import java.util.ArrayList;
23 import java.util.Collection;
24 import java.util.List;
25 import static java.util.Objects.requireNonNull;
26 import java.util.Set;
27
28 import javax.inject.Inject;
29 import javax.inject.Named;
30
31 import org.eclipse.aether.RepositorySystemSession;
32 import org.eclipse.aether.repository.RemoteRepository;
33 import org.eclipse.aether.spi.connector.layout.RepositoryLayout;
34 import org.eclipse.aether.spi.connector.layout.RepositoryLayoutFactory;
35 import org.eclipse.aether.spi.connector.layout.RepositoryLayoutProvider;
36 import org.eclipse.aether.spi.locator.Service;
37 import org.eclipse.aether.spi.locator.ServiceLocator;
38 import org.eclipse.aether.transfer.NoRepositoryLayoutException;
39 import org.slf4j.Logger;
40 import org.slf4j.LoggerFactory;
41
42
43
44 @Named
45 public final class DefaultRepositoryLayoutProvider
46 implements RepositoryLayoutProvider, Service
47 {
48
49 private static final Logger LOGGER = LoggerFactory.getLogger( DefaultRepositoryLayoutProvider.class );
50
51 private Collection<RepositoryLayoutFactory> factories = new ArrayList<>();
52
53 public DefaultRepositoryLayoutProvider()
54 {
55
56 }
57
58 @Inject
59 DefaultRepositoryLayoutProvider( Set<RepositoryLayoutFactory> layoutFactories )
60 {
61 setRepositoryLayoutFactories( layoutFactories );
62 }
63
64 public void initService( ServiceLocator locator )
65 {
66 setRepositoryLayoutFactories( locator.getServices( RepositoryLayoutFactory.class ) );
67 }
68
69 public DefaultRepositoryLayoutProvider addRepositoryLayoutFactory( RepositoryLayoutFactory factory )
70 {
71 factories.add( requireNonNull( factory, "layout factory cannot be null" ) );
72 return this;
73 }
74
75 public DefaultRepositoryLayoutProvider setRepositoryLayoutFactories( Collection<RepositoryLayoutFactory> factories )
76 {
77 if ( factories == null )
78 {
79 this.factories = new ArrayList<>();
80 }
81 else
82 {
83 this.factories = factories;
84 }
85 return this;
86 }
87
88 public RepositoryLayout newRepositoryLayout( RepositorySystemSession session, RemoteRepository repository )
89 throws NoRepositoryLayoutException
90 {
91 requireNonNull( repository, "remote repository cannot be null" );
92
93 PrioritizedComponents<RepositoryLayoutFactory> factories = new PrioritizedComponents<>( session );
94 for ( RepositoryLayoutFactory factory : this.factories )
95 {
96 factories.add( factory, factory.getPriority() );
97 }
98
99 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
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 }