diff --git a/common/source/java/ch/systemsx/cisd/common/action/IMapper.java b/common/source/java/ch/systemsx/cisd/common/action/IMapper.java
new file mode 100644
index 0000000000000000000000000000000000000000..40127dd7ebf156f34b6115b24cf7da91cf9c0bcc
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+++ b/common/source/java/ch/systemsx/cisd/common/action/IMapper.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2012 ETH Zuerich, CISD
+ *
+ * Licensed 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.
+ */
+
+package ch.systemsx.cisd.common.action;
+
+/**
+ * The interface for the map action - convert item of one type into another.
+ * 
+ * @author Jakub Straszewski
+ */
+public interface IMapper<T, V>
+{
+    V map(T item);
+}