Added filter and filter criteria

java/com.sap.sailing.datamining/src/com/sap/sailing/datamining/Filter.java

@@ -0,0 +1,9 @@
+package com.sap.sailing.datamining;
+
+import java.util.Collection;
+
+public interface Filter<DataType> {
+    
+    public Collection<DataType> filter(Collection<DataType> data);
+
+}

java/com.sap.sailing.datamining/src/com/sap/sailing/datamining/FilterCriteria.java

@@ -0,0 +1,7 @@
+package com.sap.sailing.datamining;
+
+public interface FilterCriteria<DataType> {
+    
+    public boolean matches(DataType data);
+
+}

java/com.sap.sailing.datamining/src/com/sap/sailing/datamining/GPSFixFilter.java

@@ -0,0 +1,5 @@
+package com.sap.sailing.datamining;
+
+public interface GPSFixFilter extends Filter<GPSFixWithContext> {
+
+}

java/com.sap.sailing.datamining/src/com/sap/sailing/datamining/GPSFixFilterCriteria.java

@@ -0,0 +1,5 @@
+package com.sap.sailing.datamining;
+
+public interface GPSFixFilterCriteria extends FilterCriteria<GPSFixWithContext> {
+
+}

java/com.sap.sailing.datamining/src/com/sap/sailing/datamining/impl/FilterByCriteriaImpl.java

@@ -0,0 +1,28 @@
+package com.sap.sailing.datamining.impl;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+import com.sap.sailing.datamining.Filter;
+import com.sap.sailing.datamining.FilterCriteria;
+
+public class FilterByCriteriaImpl<DataType> implements Filter<DataType> {
+    
+    private FilterCriteria<DataType> criteria;
+
+    public FilterByCriteriaImpl(FilterCriteria<DataType> criteria) {
+        this.criteria = criteria;
+    }
+
+    @Override
+    public Collection<DataType> filter(Collection<DataType> data) {
+        Collection<DataType> filteredData = new ArrayList<DataType>();
+        for (DataType dataEntry : data) {
+            if (criteria.matches(dataEntry)) {
+                filteredData.add(dataEntry);
+            }
+        }
+        return filteredData;
+    }
+
+}