1 files changed, 142 insertions, 0 deletions
diff --git a/framework/src/maven/apache-maven-3.3.3/maven-settings-builder/src/main/java/org/apache/maven/settings/merge/MavenSettingsMerger.java b/framework/src/maven/apache-maven-3.3.3/maven-settings-builder/src/main/java/org/apache/maven/settings/merge/MavenSettingsMerger.java
new file mode 100644
index 00000000..fd419fb2
--- /dev/null
+++ b/framework/src/maven/apache-maven-3.3.3/maven-settings-builder/src/main/java/org/apache/maven/settings/merge/MavenSettingsMerger.java
@@ -0,0 +1,142 @@
+package org.apache.maven.settings.merge;
+
+/*
+ * 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.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.maven.settings.IdentifiableBase;
+import org.apache.maven.settings.Settings;
+import org.codehaus.plexus.util.StringUtils;
+
+/**
+ * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>
+ * @author Benjamin Bentmann
+ */
+public class MavenSettingsMerger
+{
+
+    /**
+     * @param dominant
+     * @param recessive
+     * @param recessiveSourceLevel
+     */
+    public void merge( Settings dominant, Settings recessive, String recessiveSourceLevel )
+    {
+        if ( dominant == null || recessive == null )
+        {
+            return;
+        }
+
+        recessive.setSourceLevel( recessiveSourceLevel );
+
+        List<String> dominantActiveProfiles = dominant.getActiveProfiles();
+        List<String> recessiveActiveProfiles = recessive.getActiveProfiles();
+
+        if ( recessiveActiveProfiles != null )
+        {
+            if ( dominantActiveProfiles == null )
+            {
+                dominantActiveProfiles = new ArrayList<String>();
+                dominant.setActiveProfiles( dominantActiveProfiles );
+            }
+
+            for ( String profileId : recessiveActiveProfiles )
+            {
+                if ( !dominantActiveProfiles.contains( profileId ) )
+                {
+                    dominantActiveProfiles.add( profileId );
+                }
+            }
+        }
+
+        List<String> dominantPluginGroupIds = dominant.getPluginGroups();
+
+        List<String> recessivePluginGroupIds = recessive.getPluginGroups();
+
+        if ( recessivePluginGroupIds != null )
+        {
+            if ( dominantPluginGroupIds == null )
+            {
+                dominantPluginGroupIds = new ArrayList<String>();
+                dominant.setPluginGroups( dominantPluginGroupIds );
+            }
+
+            for ( String pluginGroupId : recessivePluginGroupIds )
+            {
+                if ( !dominantPluginGroupIds.contains( pluginGroupId ) )
+                {
+                    dominantPluginGroupIds.add( pluginGroupId );
+                }
+            }
+        }
+
+        if ( StringUtils.isEmpty( dominant.getLocalRepository() ) )
+        {
+            dominant.setLocalRepository( recessive.getLocalRepository() );
+        }
+
+        shallowMergeById( dominant.getMirrors(), recessive.getMirrors(), recessiveSourceLevel );
+        shallowMergeById( dominant.getServers(), recessive.getServers(), recessiveSourceLevel );
+        shallowMergeById( dominant.getProxies(), recessive.getProxies(), recessiveSourceLevel );
+        shallowMergeById( dominant.getProfiles(), recessive.getProfiles(), recessiveSourceLevel );
+
+    }
+
+    /**
+     * @param dominant
+     * @param recessive
+     * @param recessiveSourceLevel
+     */
+    private static <T extends IdentifiableBase> void shallowMergeById( List<T> dominant, List<T> recessive,
+                                                                       String recessiveSourceLevel )
+    {
+        Map<String, T> dominantById = mapById( dominant );
+
+        for ( T identifiable : recessive )
+        {
+            if ( !dominantById.containsKey( identifiable.getId() ) )
+            {
+                identifiable.setSourceLevel( recessiveSourceLevel );
+
+                dominant.add( identifiable );
+            }
+        }
+    }
+
+    /**
+     * @param identifiables
+     * @return a map
+     */
+    private static <T extends IdentifiableBase> Map<String, T> mapById( List<T> identifiables )
+    {
+        Map<String, T> byId = new HashMap<String, T>();
+
+        for ( T identifiable : identifiables )
+        {
+            byId.put( identifiable.getId(), identifiable );
+        }
+
+        return byId;
+    }
+
+}