--- a/geo-backend/src/main/java/de/intevation/gnv/geobackend/base/query/QueryExecutor.java	Sun Apr 18 09:22:38 2010 +0000
+++ b/geo-backend/src/main/java/de/intevation/gnv/geobackend/base/query/QueryExecutor.java	Tue Apr 20 12:42:17 2010 +0000
@@ -1,11 +1,10 @@
 package de.intevation.gnv.geobackend.base.query;
 
+import java.util.Collection;
+
 import de.intevation.gnv.geobackend.base.Result;
-
 import de.intevation.gnv.geobackend.base.query.exception.QueryException;
 
-import java.util.Collection;
-
 /**
  * This Interface provides the Method to execute Queries
  * against a Datastore eg. Databases
@@ -23,9 +22,27 @@
      * @return the fetched Values
      * @throws QueryException
      */
-    Collection<Result> executeQuery(String queryID, String[] filter) throws QueryException;
+    Collection<Result> executeQuery(String queryID, 
+                                    String[] filter) 
+                                    throws QueryException;
 
+    /**
+     * Returns the cached results to a given Query.
+     * @param query the Query that should identify the Result
+     * @return the Cached results or null if no results are cached.
+     */
     Collection<Result> cachedResults(String query);
 
+    /**
+     * Writes the Result into the Cache
+     * @param query the Query that will be used as Identifier.
+     * @param results The Results that should be cached.
+     */
     void cacheResults(String query, Collection<Result> results);
+
+    /**
+     * Clears the Cache using the Names of the Database-Tables
+     * @param tableNames the Tablenames that should be used to Clear the Cache.
+     */
+    void clearCache(String[] tableNames);
 }