1 files changed, 94 insertions, 0 deletions
diff --git a/components/slice-analysis-ms/src/main/java/org/onap/slice/analysis/ms/service/AverageCalculator.java b/components/slice-analysis-ms/src/main/java/org/onap/slice/analysis/ms/service/AverageCalculator.java
new file mode 100644
index 00000000..a003e9c0
--- /dev/null
+++ b/components/slice-analysis-ms/src/main/java/org/onap/slice/analysis/ms/service/AverageCalculator.java
@@ -0,0 +1,94 @@
+/*******************************************************************************
+ *  ============LICENSE_START=======================================================
+ *  slice-analysis-ms
+ *  ================================================================================
+ *   Copyright (C) 2020 Wipro Limited.
+ *   ==============================================================================
+ *     Licensed under the Apache License, Version 2.0 (the "License");
+ *     you may not use this file except in compliance with the License.
+ *     You may obtain a copy of the License at
+ *
+ *          http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *     Unless required by applicable law or agreed to in writing, software
+ *     distributed under the License is distributed on an "AS IS" BASIS,
+ *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *     See the License for the specific language governing permissions and
+ *     limitations under the License.
+ *     ============LICENSE_END=========================================================
+ *
+ *******************************************************************************/
+
+package org.onap.slice.analysis.ms.service;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.annotation.PostConstruct;
+
+import org.onap.slice.analysis.ms.models.MeasurementObject;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+
+/** 
+ * This class has utility methods for calculating the average of samples
+ */
+@Component
+public class AverageCalculator {
+	private static Logger log = LoggerFactory.getLogger(AverageCalculator.class);
+	private List<String> pmNames;
+
+	@PostConstruct
+	public void init() {
+		pmNames = new ArrayList<>();
+		pmNames.add("PrbUsedDl");
+		pmNames.add("PrbUsedUl");
+	}
+
+	/**
+	 * Find average of samples
+	 */
+	public List<MeasurementObject> findAverageOfSamples(List<List<MeasurementObject>> samples) {
+		int numOfSamples = samples.size();
+		List<MeasurementObject> result = new ArrayList<>();
+		samples.forEach(sample -> 
+		sample.forEach(cellMeasObj -> {
+			int index = result.indexOf(cellMeasObj);
+			if(index != -1) {
+				result.set(index, findSum(result.get(index), cellMeasObj));
+			}
+			else { 
+				result.add(cellMeasObj);
+			}
+		})
+				);
+		return findAvg(result, numOfSamples);
+	}
+
+	/**
+	 * Calculate the sum
+	 */
+	public MeasurementObject findSum(MeasurementObject existing, MeasurementObject current) {
+		pmNames.forEach(pmName -> {
+			int newValue = current.getPmData().get(pmName) + existing.getPmData().get(pmName);
+			existing.getPmData().put(pmName, newValue);
+		});
+		return existing;
+	}
+
+	/**
+	 * Calculate the average
+	 */
+	public List<MeasurementObject> findAvg(List<MeasurementObject> result, int numOfSamples) {
+		result.forEach(cellMeasObj ->
+		pmNames.forEach(pmName -> {
+			int value = (cellMeasObj.getPmData().get(pmName))/numOfSamples;
+			cellMeasObj.getPmData().put(pmName, value);
+		})
+				);
+		log.debug("Average of measurement data samples {}",result);
+		return result;
+	}
+}
+