-added missing ArtifactClassifierMapping which got left out from yesterday's commit

git-svn-id: https://svn.apache.org/repos/asf/maven/archiva/trunk@596922 13f79535-47bb-0310-9956-ffa450edef68

archiva-base/archiva-repository-layer/src/main/java/org/apache/maven/archiva/repository/content/ArtifactClassifierMapping.java

@@ -0,0 +1,57 @@
+package org.apache.maven.archiva.repository.content;
+
+/*
+ * 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 org.apache.commons.lang.StringUtils;
+
+import java.io.File;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Pattern;
+
+/**
+ * ArtifactExtensionMapping
+ *
+ */
+public class ArtifactClassifierMapping
+{
+    private static final Map<String, String> typeToClassifierMap;
+
+    static
+    {
+        typeToClassifierMap = new HashMap<String, String>();
+        typeToClassifierMap.put( "java-source", "sources" );
+        typeToClassifierMap.put( "javadoc.jar", "javadoc" );
+        typeToClassifierMap.put( "javadoc", "javadoc" );
+    }
+
+    public static String getClassifier( String type )
+    {
+        // Try specialized types first.
+        if ( typeToClassifierMap.containsKey( type ) )
+        {
+            return (String) typeToClassifierMap.get( type );
+        }
+
+        // No classifier
+        return null;
+    }
+}
+