GIPS algos: adds a check to ensure given vnets are exclusively available in the model

vne.algorithms/src/algorithms/gips/VneGipsAlgorithm.java

@@ -69,6 +69,8 @@ public class VneGipsAlgorithm extends AbstractAlgorithm {
 			throw new IllegalArgumentException("Provided set of virtual networks was empty.");
 		}
 
+		VneGipsAlgorithmUtils.checkGivenVnets(vNets);
+
 		if (instance == null) {
 			instance = new VneGipsAlgorithm(sNet, vNets);
 		}

vne.algorithms/src/algorithms/gips/VneGipsAlgorithmUtils.java

@@ -0,0 +1,45 @@
+package algorithms.gips;
+
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+
+import facade.ModelFacade;
+import model.Network;
+import model.VirtualNetwork;
+
+public class VneGipsAlgorithmUtils {
+
+	/**
+	 * Checks if the given set of virtual networks exactly match the non-embedded
+	 * virtual networks within the model.
+	 * 
+	 * @param vNets Set of virtual networks to check for.
+	 */
+	protected static void checkGivenVnets(final Set<VirtualNetwork> vNets) {
+		if (vNets == null) {
+			throw new IllegalArgumentException("Virtual network set was null.");
+		}
+
+		final Collection<Network> modelNets = ModelFacade.getInstance().getAllNetworks();
+		final Set<VirtualNetwork> modelVnets = new HashSet<VirtualNetwork>();
+		for (final Network n : modelNets) {
+			if (n instanceof VirtualNetwork vnet) {
+				if (vnet.getHost() == null && vnet.getHostServer() == null) {
+					modelVnets.add(vnet);
+				}
+			}
+		}
+
+		if (vNets.size() != modelVnets.size()) {
+			throw new IllegalStateException("Number of given virtual networks does not match the number of "
+					+ "non-embedded virtual networks existing in the model.");
+		}
+
+		if (!vNets.containsAll(modelVnets) || !modelVnets.containsAll(vNets)) {
+			throw new IllegalStateException("Given set of virtual network does not match the set of non-embedded"
+					+ " virtual networks existing in the model.");
+		}
+	}
+
+}

vne.algorithms/src/algorithms/gips/VneGipsMigrationAlgorithm.java

@@ -84,6 +84,8 @@ public class VneGipsMigrationAlgorithm extends AbstractAlgorithm {
 			throw new IllegalArgumentException("Provided set of virtual networks was empty.");
 		}
 
+		VneGipsAlgorithmUtils.checkGivenVnets(vNets);
+
 		if (instance == null) {
 			instance = new VneGipsMigrationAlgorithm(sNet, vNets);
 		}

vne.algorithms/src/algorithms/gips/VneGipsSeqAlgorithm.java

@@ -69,6 +69,8 @@ public class VneGipsSeqAlgorithm extends AbstractAlgorithm {
 			throw new IllegalArgumentException("Provided set of virtual networks was empty.");
 		}
 
+		VneGipsAlgorithmUtils.checkGivenVnets(vNets);
+
 		if (instance == null) {
 			instance = new VneGipsSeqAlgorithm(sNet, vNets);
 		}