WIP: align Solr JSON records to the explore portal requirements

src/main/java/eu/dnetlib/dhp/schema/solr/Measure.java

@@ -1,10 +1,36 @@
 package eu.dnetlib.dhp.schema.solr;
 
 import java.io.Serializable;
+import java.util.List;
 
 public class Measure implements Serializable {
 
     private static final long serialVersionUID = 57939927121851504L;
 
-    //TODO define me!
+    private String id;
+
+    private List<CodeLabel> unit;
+
+    public static Measure newInstance(String id, List<CodeLabel> unit) {
+        Measure m = new Measure();
+        m.setId(id);
+        m.setUnit(unit);
+        return m;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public List<CodeLabel> getUnit() {
+        return unit;
+    }
+
+    public void setUnit(List<CodeLabel> unit) {
+        this.unit = unit;
+    }
 }