mirna implements common interface for mirna, chemicals and drugs

annotation/src/main/java/lcsb/mapviewer/annotation/data/MiRNA.java

@@ -2,10 +2,13 @@ package lcsb.mapviewer.annotation.data;
 
 import java.io.Serializable;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
 
 import javax.xml.bind.annotation.XmlRootElement;
 
+import lcsb.mapviewer.model.map.MiriamData;
+
 /**
  * Object representing element obtained from Toxigenomic database.
  * 
@@ -13,7 +16,7 @@ import javax.xml.bind.annotation.XmlRootElement;
  * 
  */
 @XmlRootElement
-public class MiRNA implements Serializable {
+public class MiRNA implements Serializable, TargettingStructure {
 
 	/**
 	 * 
@@ -100,4 +103,9 @@ public class MiRNA implements Serializable {
 		this.targets.add(target);
 	}
 
+	@Override
+	public Collection<MiriamData> getSources() {
+		return new ArrayList<>();
+	}
+
 }