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/*******************************************************************************
* ============LICENSE_START=======================================================
* son-handler
* ================================================================================
* Copyright (C) 2019 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.dcaegen2.services.sonhms.child;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.onap.dcaegen2.services.sonhms.model.CellNeighbourList;
import org.onap.dcaegen2.services.sonhms.model.CellPciPair;
import org.slf4j.Logger;
public class Graph {
private static final Logger log = org.slf4j.LoggerFactory.getLogger(Graph.class);
// symbol table: key = string vertex, value = set of neighboring vertices
private Map<CellPciPair, ArrayList<CellPciPair>> cellPciNeighbourMap;
private UUID graphId;
/**
* Parameterized constructor.
*/
public Graph(String clusterInfo) {
JSONArray cells = new JSONArray(clusterInfo);
Map<CellPciPair, ArrayList<CellPciPair>> cellMap = new HashMap<>();
for (int i = 0; i < cells.length(); i++) {
JSONObject cell = (JSONObject) cells.get(i);
CellPciPair cellPciPair = new CellPciPair(cell.getString("cellId"), cell.getInt("physicalCellId"));
ObjectMapper mapper = new ObjectMapper();
ArrayList<CellPciPair> neighbours = new ArrayList<>();
try {
neighbours = mapper.readValue(cell.getString("neighbours"),
new TypeReference<ArrayList<CellPciPair>>() { });
} catch (JSONException | IOException e) {
log.debug("Error parsing json: {}", e);
}
cellMap.put(cellPciPair, neighbours);
}
this.cellPciNeighbourMap = cellMap;
}
public UUID getGraphId() {
return graphId;
}
public void setGraphId(UUID graphId) {
this.graphId = graphId;
}
public Map<CellPciPair, ArrayList<CellPciPair>> getCellPciNeighbourMap() {
return cellPciNeighbourMap;
}
public void setCellPciNeighbourMap(Map<CellPciPair, ArrayList<CellPciPair>> cellPciNeighbourMap) {
this.cellPciNeighbourMap = cellPciNeighbourMap;
}
/**
* Initializes an empty graph with no vertices or edges.
*/
public Graph() {
this.cellPciNeighbourMap = new ConcurrentHashMap<>();
}
// throw an exception if v is not a vertex
private void validateVertex(CellPciPair start) {
if (!hasVertex(start)) {
throw new IllegalArgumentException(start + " is not a vertex");
}
}
/**
* Adds the edge v-w to this graph (if it is not already an edge).
*/
public void addEdge(CellPciPair start, CellPciPair end) {
if (!hasVertex(start)) {
addVertex(start);
}
if (!hasVertex(end)) {
addVertex(end);
}
if (!hasEdge(start, end)) {
this.cellPciNeighbourMap.get(start).add(end);
}
}
/**
* Adds vertex v to this graph (if it is not already a vertex).
*/
public void addVertex(CellPciPair start) {
if (!hasVertex(start)) {
this.cellPciNeighbourMap.put(start, new ArrayList<CellPciPair>());
}
}
/**
* Returns true if v is a vertex in this graph.
*/
public boolean hasVertex(CellPciPair start) {
return this.cellPciNeighbourMap.containsKey(start);
}
/**
* Returns true if v-w is an edge in this graph.
*/
public boolean hasEdge(CellPciPair start, CellPciPair end) {
validateVertex(start);
validateVertex(end);
return this.cellPciNeighbourMap.get(start).contains(end);
}
/**
* Updates Vertex.
*/
public void updateVertex(CellPciPair oldPair, CellPciPair newPair) {
int oldPci = oldPair.getPhysicalCellId();
int newPci = newPair.getPhysicalCellId();
if (oldPci != newPci) {
this.cellPciNeighbourMap.put(newPair, this.cellPciNeighbourMap.get(oldPair));
this.cellPciNeighbourMap.remove(oldPair);
}
for (Map.Entry<CellPciPair, ArrayList<CellPciPair>> entry : this.cellPciNeighbourMap.entrySet()) {
ArrayList<CellPciPair> al = entry.getValue();
for (int i = 0; i < al.size(); i++) {
int pci = al.get(i).getPhysicalCellId();
if ((pci != newPci) && al.contains(oldPair)) {
al.remove(oldPair);
al.add(newPair);
}
}
}
log.debug("Final Map {}", cellPciNeighbourMap);
}
@Override
public String toString() {
return "Graph [cellPciNeighbourMap=" + cellPciNeighbourMap + ", graphId=" + graphId + "]";
}
/**
* Convert Graph into a json.
*/
public String getPciNeighbourJson() {
List<CellNeighbourList> cells = new ArrayList<>();
for (Entry<CellPciPair, ArrayList<CellPciPair>> entry : cellPciNeighbourMap.entrySet()) {
CellPciPair key = entry.getKey();
JSONArray neighbours = new JSONArray(cellPciNeighbourMap.get(key));
CellNeighbourList cell = new CellNeighbourList(key.getCellId(), key.getPhysicalCellId(),
neighbours.toString());
cells.add(cell);
}
ObjectMapper mapper = new ObjectMapper();
String pciNeighbourJson = "";
try {
pciNeighbourJson = mapper.writeValueAsString(cells);
} catch (JsonProcessingException e) {
log.debug("Error while processing json: {}", e);
}
return pciNeighbourJson;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((cellPciNeighbourMap == null) ? 0 : cellPciNeighbourMap.hashCode());
result = prime * result + ((graphId == null) ? 0 : graphId.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
Graph other = (Graph) obj;
if (cellPciNeighbourMap == null) {
if (other.cellPciNeighbourMap != null) {
return false;
}
} else if (!cellPciNeighbourMap.equals(other.cellPciNeighbourMap)) {
return false;
}
if (graphId == null) {
if (other.graphId != null) {
return false;
}
} else if (!graphId.equals(other.graphId)) {
return false;
}
return true;
}
}
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