1 package org.apache.maven.shared.transfer.project;
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22 import org.codehaus.plexus.classworlds.realm.ClassRealm;
23 import org.slf4j.Logger;
24 import org.slf4j.LoggerFactory;
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33 public class MavenAetherUtils
34 {
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36 private static final Logger LOGGER = LoggerFactory.getLogger( MavenAetherUtils.class );
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38 private static final String NO_SUCH_REALM_EXCEPTION = "org.codehaus.plexus.classworlds.realm.NoSuchRealmException";
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43 public static void importAetherLibrary()
44 {
45 ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
46 if ( isClassRealm( classLoader ) )
47 {
48 importAether( classLoader );
49 }
50 }
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60 private static void importAether( ClassLoader classLoader )
61 {
62 ClassRealm classRealm = (ClassRealm) classLoader;
63 try
64 {
65 classRealm.importFrom( "plexus.core", "org.eclipse.aether.util" );
66 }
67 catch ( Exception e )
68 {
69 if ( NO_SUCH_REALM_EXCEPTION.equals( e.getClass().getCanonicalName() ) )
70 {
71 LOGGER.info( "'plexus.core' ClassRealm could not be found. "
72 + "Ignore this message if you are using the library outside of a Maven execution.", e );
73 }
74 else
75 {
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77 LOGGER.error( "Unexpected exception when importing Aether library to the '{}' ClassRealm", classLoader,
78 e );
79 }
80 }
81 }
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89 private static boolean isClassRealm( ClassLoader classLoader )
90 {
91 for ( Class<?> clazz = classLoader.getClass(); clazz != null; clazz = clazz.getSuperclass() )
92 {
93 if ( "org.codehaus.plexus.classworlds.realm.ClassRealm".equals( clazz.getCanonicalName() ) )
94 {
95 return true;
96 }
97 }
98 return false;
99 }
100 }