# HG changeset patch
# User Felix Wolfsteller <felix.wolfsteller@intevation.de>
# Date 1318941842 0
# Node ID fb4fb1c67c35827050f0ac6cddbb8e070664ac03
# Parent  eb35570df0e8daa41ac678464df6e9ac4dc68d0b
Added WKmsFactory.

flys-artifacts/trunk@3004 c6561f87-3c4e-4783-a992-168aeb5c3f6f

diff -r eb35570df0e8 -r fb4fb1c67c35 flys-artifacts/ChangeLog
--- a/flys-artifacts/ChangeLog	Tue Oct 18 12:31:36 2011 +0000
+++ b/flys-artifacts/ChangeLog	Tue Oct 18 12:44:02 2011 +0000
@@ -1,3 +1,16 @@
+2011-10-18	Felix Wolfsteller	<felix.wolfsteller@intevation.de>
+
+	Add WKMsFactory to access 'static' wst-data.
+
+	* src/main/java/de/intevation/flys/artifacts/model/StaticWKmsCacheKey.java:
+	  Cache Key for the static WKms data.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WKmsFactory.java:
+	  New, creates WKms from wst-id and column. Does not yet fetch the
+	  name.
+
+	* doc/conf/cache.xml: Added cache configuration for static wkms data.
+
 2011-10-18	Felix Wolfsteller	<felix.wolfsteller@intevation.de>
 
 	Cosmetics, docs.
diff -r eb35570df0e8 -r fb4fb1c67c35 flys-artifacts/doc/conf/cache.xml
--- a/flys-artifacts/doc/conf/cache.xml	Tue Oct 18 12:31:36 2011 +0000
+++ b/flys-artifacts/doc/conf/cache.xml	Tue Oct 18 12:44:02 2011 +0000
@@ -56,6 +56,16 @@
            memoryStoreEvictionPolicy="LRU"
            />
 
+    <!-- This one is used to cache the non-computed wst-values.-->
+    <cache name="wst-value-table-static"
+           maxElementsInMemory="200"
+           eternal="false"
+           timeToLiveSeconds="172800"
+           overflowToDisk="true"
+           diskPersistent="true"
+           memoryStoreEvictionPolicy="LRU"
+           />
+
     <!-- This one is used for the SQL statements used by the static datacage -->
     <cache name="datacage.db"
            maxElementsInMemory="2000"
diff -r eb35570df0e8 -r fb4fb1c67c35 flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/StaticWKmsCacheKey.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/StaticWKmsCacheKey.java	Tue Oct 18 12:44:02 2011 +0000
@@ -0,0 +1,33 @@
+package de.intevation.flys.artifacts.model;
+
+import java.io.Serializable;
+
+/**
+ * Caching-Key object for 'static' wst- data.
+ */
+public final class StaticWKmsCacheKey
+implements         Serializable
+{
+    public static final String CACHE_NAME = "wst-value-table-static";
+
+    private int column;
+    private int wst_id;
+
+    public StaticWKmsCacheKey(int column, int wst_id) {
+        this.wst_id  = wst_id;
+        this.column  = column;
+    }
+
+    public int hashCode() {
+        return (wst_id << 8) | column;
+    }
+
+    public boolean equals(Object other) {
+        if (!(other instanceof StaticWKmsCacheKey)) {
+            return false;
+        }
+        StaticWKmsCacheKey o = (StaticWKmsCacheKey) other;
+        return wst_id == o.wst_id && this.column == o.column;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
diff -r eb35570df0e8 -r fb4fb1c67c35 flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WKmsFactory.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WKmsFactory.java	Tue Oct 18 12:44:02 2011 +0000
@@ -0,0 +1,116 @@
+package de.intevation.flys.artifacts.model;
+
+import java.util.List;
+
+import net.sf.ehcache.Cache;
+import net.sf.ehcache.Element;
+
+import org.apache.log4j.Logger;
+
+import org.hibernate.Session;
+
+import org.hibernate.SQLQuery;
+import org.hibernate.type.StandardBasicTypes;
+
+import de.intevation.flys.artifacts.model.WKms;
+import de.intevation.flys.artifacts.model.WKmsImpl;
+
+import de.intevation.flys.artifacts.cache.CacheFactory;
+
+import de.intevation.flys.backend.SessionHolder;
+
+/**
+ * Factory to access ready-made WKms for other (than computed) 'kinds' of 
+ * WST-data.
+ */
+public class WKmsFactory
+{
+    private static Logger log = Logger.getLogger(WKmsFactory.class);
+
+    /**
+     *  Value for wsts 'kind' typically used for "additional
+     *  longitudinal sections.
+     */
+    public static final int KIND_ZUS = 1;
+
+    /**
+     * Value for wsts 'kind' typically used for flood protection measures
+     * (e.g. dikes).
+     */
+    public static final int KIND_PROTECTION = 5;
+
+    /** Query to get km and ws for wst_id and column_pos. */
+    public static final String SQL_SELECT_WS =
+        "SELECT km, w FROM wst_w_values " +
+        "WHERE wst_id = :wst_id AND column_pos = :column_pos";
+
+
+    private WKmsFactory() {
+    }
+
+
+    /**
+     * Get WKms for given column and wst_id, caring about the cache.
+     */
+    public static WKms getWKms(int kind, int column, int wst_id) {
+        log.debug("WKmsFactory.getWKms");
+        Cache cache = CacheFactory.getCache(StaticWKmsCacheKey.CACHE_NAME);
+
+        StaticWKmsCacheKey cacheKey;
+
+        if (cache != null) {
+            cacheKey = new StaticWKmsCacheKey(wst_id, column);
+            Element element = cache.get(cacheKey);
+            if (element != null) {
+                log.debug("Got static wst values from cache");
+                return (WKms)element.getValue();
+            }
+        }
+        else {
+            cacheKey = null;
+        }
+
+        WKms values = getWKmsUncached(kind, column, wst_id);
+
+        if (values != null && cacheKey != null) {
+            log.debug("Store static wst values in cache.");
+            Element element = new Element(cacheKey, values);
+            cache.put(element);
+        }
+        return values;
+    }
+
+
+    /**
+     * Get WKms from db.
+     */
+    public static WKms getWKmsUncached(int kind, int column, int wst_id) {
+        log.debug("WKmsFactory.getWKmsUncached c/" + column + ", wst_id/" + wst_id);
+        Session session = SessionHolder.HOLDER.get();
+
+        SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_WS)
+            .addScalar("km", StandardBasicTypes.DOUBLE)
+            .addScalar("w",  StandardBasicTypes.DOUBLE);
+        sqlQuery.setInteger("wst_id",     wst_id);
+        sqlQuery.setInteger("column_pos", column);
+
+        List<Object []> results = sqlQuery.list();
+
+        // TODO Fetch name in a separate query.
+        String name = "todo";
+
+        WKmsImpl wkms = new WKmsImpl(name);
+        double kms [] = new double[results.size()];
+        double ws  [] = new double[results.size()];
+
+        int lastColumn = Integer.MAX_VALUE;
+
+        for (int i = 0; i < results.size(); i++) {
+            Object[] row = results.get(i);
+            wkms.add((Double) row[0], (Double) row[1]);
+        }
+
+        return wkms;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :