001 package org.apache.maven.settings.merge;
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
022 import java.util.ArrayList;
023 import java.util.HashMap;
024 import java.util.List;
025 import java.util.Map;
026
027 import org.apache.maven.settings.IdentifiableBase;
028 import org.apache.maven.settings.Settings;
029 import org.codehaus.plexus.util.StringUtils;
030
031 /**
032 * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>
033 * @author Benjamin Bentmann
034 */
035 public class MavenSettingsMerger
036 {
037
038 /**
039 * @param dominant
040 * @param recessive
041 * @param recessiveSourceLevel
042 */
043 public void merge( Settings dominant, Settings recessive, String recessiveSourceLevel )
044 {
045 if ( dominant == null || recessive == null )
046 {
047 return;
048 }
049
050 recessive.setSourceLevel( recessiveSourceLevel );
051
052 List<String> dominantActiveProfiles = dominant.getActiveProfiles();
053 List<String> recessiveActiveProfiles = recessive.getActiveProfiles();
054
055 if ( recessiveActiveProfiles != null )
056 {
057 if ( dominantActiveProfiles == null )
058 {
059 dominantActiveProfiles = new ArrayList<String>();
060 dominant.setActiveProfiles( dominantActiveProfiles );
061 }
062
063 for ( String profileId : recessiveActiveProfiles )
064 {
065 if ( !dominantActiveProfiles.contains( profileId ) )
066 {
067 dominantActiveProfiles.add( profileId );
068 }
069 }
070 }
071
072 List<String> dominantPluginGroupIds = dominant.getPluginGroups();
073
074 List<String> recessivePluginGroupIds = recessive.getPluginGroups();
075
076 if ( recessivePluginGroupIds != null )
077 {
078 if ( dominantPluginGroupIds == null )
079 {
080 dominantPluginGroupIds = new ArrayList<String>();
081 dominant.setPluginGroups( dominantPluginGroupIds );
082 }
083
084 for ( String pluginGroupId : recessivePluginGroupIds )
085 {
086 if ( !dominantPluginGroupIds.contains( pluginGroupId ) )
087 {
088 dominantPluginGroupIds.add( pluginGroupId );
089 }
090 }
091 }
092
093 if ( StringUtils.isEmpty( dominant.getLocalRepository() ) )
094 {
095 dominant.setLocalRepository( recessive.getLocalRepository() );
096 }
097
098 shallowMergeById( dominant.getMirrors(), recessive.getMirrors(), recessiveSourceLevel );
099 shallowMergeById( dominant.getServers(), recessive.getServers(), recessiveSourceLevel );
100 shallowMergeById( dominant.getProxies(), recessive.getProxies(), recessiveSourceLevel );
101 shallowMergeById( dominant.getProfiles(), recessive.getProfiles(), recessiveSourceLevel );
102
103 }
104
105 /**
106 * @param dominant
107 * @param recessive
108 * @param recessiveSourceLevel
109 */
110 private static <T extends IdentifiableBase> void shallowMergeById( List<T> dominant, List<T> recessive,
111 String recessiveSourceLevel )
112 {
113 Map<String, T> dominantById = mapById( dominant );
114
115 for ( T identifiable : recessive )
116 {
117 if ( !dominantById.containsKey( identifiable.getId() ) )
118 {
119 identifiable.setSourceLevel( recessiveSourceLevel );
120
121 dominant.add( identifiable );
122 }
123 }
124 }
125
126 /**
127 * @param identifiables
128 * @return a map
129 */
130 private static <T extends IdentifiableBase> Map<String, T> mapById( List<T> identifiables )
131 {
132 Map<String, T> byId = new HashMap<String, T>();
133
134 for ( T identifiable : identifiables )
135 {
136 byId.put( identifiable.getId(), identifiable );
137 }
138
139 return byId;
140 }
141
142 }