--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/access/FixAnalysisAccess.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,103 @@
+package org.dive4elements.river.artifacts.access;
+
+import org.dive4elements.artifactdatabase.data.StateData;
+import org.dive4elements.artifacts.CallContext;
+
+import org.dive4elements.river.artifacts.FLYSArtifact;
+
+import org.dive4elements.river.artifacts.model.DateRange;
+
+import java.util.Arrays;
+import java.util.Date;
+
+import org.apache.log4j.Logger;
+
+public class FixAnalysisAccess
+extends      FixAccess
+{
+    private static Logger log = Logger.getLogger(FixAnalysisAccess.class);
+
+    protected DateRange    referencePeriod;
+    protected DateRange [] analysisPeriods;
+
+    protected double [] qs;
+
+    public FixAnalysisAccess(FLYSArtifact artifact, CallContext context) {
+        super(artifact, context);
+    }
+
+    public DateRange getReferencePeriod() {
+        if (referencePeriod == null) {
+            StateData refStart = artifact.getData("ref_start");
+            StateData refEnd   = artifact.getData("ref_end");
+
+            if (refStart == null || refEnd == null) {
+                log.warn("missing 'ref_start' or 'ref_start' value");
+                return null;
+            }
+
+            try {
+                long rs = Long.parseLong((String)refStart.getValue());
+                long re = Long.parseLong((String)refEnd  .getValue());
+
+                if (rs > re) { long t = rs; rs = re; re = t; }
+
+                Date from = new Date(rs);
+                Date to   = new Date(re);
+                referencePeriod = new DateRange(from, to);
+            }
+            catch (NumberFormatException nfe) {
+                log.warn("ref_start or ref_end is not an integer.");
+            }
+        }
+
+        return referencePeriod;
+    }
+
+    public DateRange [] getAnalysisPeriods() {
+        if (analysisPeriods == null) {
+            analysisPeriods = getDateRange("ana_data");
+        }
+
+        return analysisPeriods;
+    }
+
+    /**
+     * @return DateRange object ranging from eldest to youngest date
+     * of analysis and reference periods.
+     */
+    public DateRange getDateRange() {
+        DateRange refP = getReferencePeriod();
+
+        if (refP == null) {
+            return null;
+        }
+
+        Date from = refP.getFrom();
+        Date to   = refP.getTo();
+
+        DateRange[] rs = getAnalysisPeriods();
+        for (DateRange r: rs) {
+            if (r.getFrom().before(from)) {
+                from = r.getFrom();
+            }
+            if (r.getTo().after(to)) {
+                to = r.getTo();
+            }
+        }
+
+        return new DateRange(from, to);
+    }
+
+    public double [] getQs() {
+        if (qs == null) {
+            qs = getDoubleArray("qs");
+        }
+
+        if (log.isDebugEnabled() && qs != null) {
+            log.debug("qs: " + Arrays.toString(qs));
+        }
+        return qs;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :