1 files changed, 170 insertions, 0 deletions
diff --git a/framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/plugin/DefaultExtensionRealmCache.java b/framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/plugin/DefaultExtensionRealmCache.java
new file mode 100644
index 00000000..c9df92c6
--- /dev/null
+++ b/framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/plugin/DefaultExtensionRealmCache.java
@@ -0,0 +1,170 @@
+package org.apache.maven.plugin;
+
+/*
+ * 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.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.apache.maven.artifact.Artifact;
+import org.apache.maven.project.ExtensionDescriptor;
+import org.apache.maven.project.MavenProject;
+import org.codehaus.plexus.classworlds.realm.ClassRealm;
+import org.codehaus.plexus.classworlds.realm.NoSuchRealmException;
+import org.codehaus.plexus.component.annotations.Component;
+import org.codehaus.plexus.personality.plexus.lifecycle.phase.Disposable;
+
+/**
+ * Default extension realm cache implementation. Assumes cached data does not change.
+ */
+@Component( role = ExtensionRealmCache.class )
+public class DefaultExtensionRealmCache
+    implements ExtensionRealmCache, Disposable
+{
+
+    protected static class CacheKey
+        implements Key
+    {
+
+        private final List<File> files;
+
+        private final List<Long> timestamps;
+
+        private final List<Long> sizes;
+
+        private final List<String> ids;
+
+        private final int hashCode;
+
+        public CacheKey( List<Artifact> extensionArtifacts )
+        {
+            this.files = new ArrayList<File>( extensionArtifacts.size() );
+            this.timestamps = new ArrayList<Long>( extensionArtifacts.size() );
+            this.sizes = new ArrayList<Long>( extensionArtifacts.size() );
+            this.ids = new ArrayList<String>( extensionArtifacts.size() );
+
+            for ( Artifact artifact : extensionArtifacts )
+            {
+                File file = artifact.getFile();
+                files.add( file );
+                timestamps.add( ( file != null ) ? Long.valueOf( file.lastModified() ) : Long.valueOf( 0 ) );
+                sizes.add( ( file != null ) ? Long.valueOf( file.length() ) : Long.valueOf( 0 ) );
+                ids.add( artifact.getVersion() );
+            }
+
+            this.hashCode =
+                31 * files.hashCode() + 31 * ids.hashCode() + 31 * timestamps.hashCode() + 31 * sizes.hashCode();
+        }
+
+        @Override
+        public int hashCode()
+        {
+            return hashCode;
+        }
+
+        @Override
+        public boolean equals( Object o )
+        {
+            if ( o == this )
+            {
+                return true;
+            }
+
+            if ( !( o instanceof CacheKey ) )
+            {
+                return false;
+            }
+
+            CacheKey other = (CacheKey) o;
+
+            return ids.equals( other.ids ) && files.equals( other.files ) && timestamps.equals( other.timestamps )
+                && sizes.equals( other.sizes );
+        }
+
+        @Override
+        public String toString()
+        {
+            return files.toString();
+        }
+    }
+
+    protected final Map<Key, CacheRecord> cache = new ConcurrentHashMap<Key, CacheRecord>();
+
+    @Override
+    public Key createKey( List<Artifact> extensionArtifacts )
+    {
+        return new CacheKey( extensionArtifacts );
+    }
+
+    public CacheRecord get( Key key )
+    {
+        return cache.get( key );
+    }
+
+    public CacheRecord put( Key key, ClassRealm extensionRealm, ExtensionDescriptor extensionDescriptor,
+                            List<Artifact> artifacts )
+    {
+        if ( extensionRealm == null )
+        {
+            throw new NullPointerException();
+        }
+
+        if ( cache.containsKey( key ) )
+        {
+            throw new IllegalStateException( "Duplicate extension realm for extension " + key );
+        }
+
+        CacheRecord record = new CacheRecord( extensionRealm, extensionDescriptor, artifacts );
+
+        cache.put( key, record );
+
+        return record;
+    }
+
+    public void flush()
+    {
+        for ( CacheRecord record : cache.values() )
+        {
+            ClassRealm realm = record.realm;
+            try
+            {
+                realm.getWorld().disposeRealm( realm.getId() );
+            }
+            catch ( NoSuchRealmException e )
+            {
+                // ignore
+            }
+        }
+        cache.clear();
+    }
+
+    public void register( MavenProject project, Key key, CacheRecord record )
+    {
+        // default cache does not track extension usage
+    }
+
+    public void dispose()
+    {
+        flush();
+    }
+
+}