Splitting configuration module. Adding mapper interface.

archiva-modules/archiva-base/archiva-common/src/main/java/org/apache/archiva/common/ModelMapper.java

@@ -0,0 +1,78 @@
+package org.apache.archiva.common;
+/*
+ * 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.
+ */
+
+/**
+ * Generic interface for mapping DTOs
+ *
+ * @author Martin Schreier <martin_s@apache.org>
+ */
+public interface ModelMapper<S,T>
+{
+    /**
+     * Converts the source instance to a new instance of the target type.
+     * @param source the source instance
+     * @return a new instance of the target type
+     */
+    T map(S source);
+
+    /**
+     * Updates the target instance based on the source instance
+     * @param source the source instance
+     * @param target the target instance
+     */
+    void update( S source, T target );
+
+
+    /**
+     * Converts the target instance back to the source type
+     * @param target the target instance
+     * @return a new instance of the source type
+     */
+    S reverseMap(T target);
+
+    /**
+     * Updates the source instance based on the target instance