*/
package org.onap.aai.modelloader.entity.model;
-import jline.internal.Log;
-
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import jline.internal.Log;
import org.onap.aai.modelloader.entity.Artifact;
/**
- * Utility class to sort the given Models according to their dependencies.
- * Example: Given a list of Models [A, B, C] where B depends on A, and A depends
- * on C, the sorted result will be [C, A, B]
+ * Utility class to sort the given Models according to their dependencies.<br>
+ * Example: Given a list of Models [A, B, C] <br>
+ * where B depends on A, and A depends on C, the sorted result will be [C, A, B]
*/
public class ModelSorter {
- /**
- * Wraps a Model object to form dependencies other Models using Edges.
- */
- static class Node {
- private final AbstractModelArtifact model;
- private final HashSet<Edge> inEdges;
- private final HashSet<Edge> outEdges;
-
- public Node(AbstractModelArtifact model) {
- this.model = model;
- inEdges = new HashSet<Edge>();
- outEdges = new HashSet<Edge>();
- }
+ /**
+ * Wraps a Model object to form dependencies other Models using Edges.
+ */
+ static class Node {
- public Node addEdge(Node node) {
- Edge edge = new Edge(this, node);
- outEdges.add(edge);
- node.inEdges.add(edge);
- return this;
- }
+ private final AbstractModelArtifact model;
+ private final HashSet<Edge> inEdges;
+ private final HashSet<Edge> outEdges;
- @Override
- public String toString() {
- return model.getUniqueIdentifier();
- }
+ public Node(AbstractModelArtifact model) {
+ this.model = model;
+ inEdges = new HashSet<>();
+ outEdges = new HashSet<>();
+ }
- @Override
- public boolean equals(Object other) {
- AbstractModelArtifact otherModel = ((Node) other).model;
- return this.model.getUniqueIdentifier().equals(otherModel.getUniqueIdentifier());
- }
+ public Node addEdge(Node node) {
+ Edge edge = new Edge(this, node);
+ outEdges.add(edge);
+ node.inEdges.add(edge);
+ return this;
+ }
- @Override
- public int hashCode() {
- return this.model.getUniqueIdentifier().hashCode();
- }
- }
-
- /**
- * Represents a dependency between two Nodes.
- */
- static class Edge {
- public final Node from;
- public final Node to;
-
- public Edge(Node from, Node to) {
- this.from = from;
- this.to = to;
- }
+ @Override
+ public String toString() {
+ return model.getUniqueIdentifier();
+ }
- @Override
- public boolean equals(Object obj) {
- Edge edge = (Edge) obj;
- return edge.from == from && edge.to == to;
- }
- }
-
- /**
- * Returns the list of models sorted by order of dependency.
- *
- * @param originalList
- * the list that needs to be sorted
- * @return a list of sorted models
- */
- public List<Artifact> sort(List<Artifact> originalList) {
-
- if (originalList.size() <= 1) {
- return originalList;
- }
+ @Override
+ public boolean equals(Object other) {
+ if (other == null || this.getClass() != other.getClass()) {
+ return false;
+ }
+ AbstractModelArtifact otherModel = ((Node) other).model;
+ return this.model.getUniqueIdentifier().equals(otherModel.getUniqueIdentifier());
+ }
- Collection<Node> nodes = createNodes(originalList);
- Collection<Node> sortedNodes = sortNodes(nodes);
-
- List<Artifact> sortedModelsList = new ArrayList<Artifact>(sortedNodes.size());
- for (Node node : sortedNodes) {
- sortedModelsList.add(node.model);
+ @Override
+ public int hashCode() {
+ return this.model.getUniqueIdentifier().hashCode();
+ }
}
- return sortedModelsList;
- }
-
- /**
- * Create nodes from the list of models and their dependencies.
- *
- * @param models
- * what the nodes creation is based upon
- * @return Collection of Node objects
- */
- private Collection<Node> createNodes(Collection<Artifact> models) {
-
- // load list of models into a map, so we can later replace referenceIds with
- // real Models
- HashMap<String, AbstractModelArtifact> versionIdToModelMap = new HashMap<>();
- for (Artifact art : models) {
- AbstractModelArtifact ma = (AbstractModelArtifact) art;
- versionIdToModelMap.put(ma.getUniqueIdentifier(), ma);
- }
+ /**
+ * Represents a dependency between two Nodes.
+ */
+ static class Edge {
- HashMap<String, Node> nodes = new HashMap<String, Node>();
- // create a node for each model and its referenced models
- for (Artifact art : models) {
-
- AbstractModelArtifact model = (AbstractModelArtifact) art;
-
- // node might have been created by another model referencing it
- Node node = nodes.get(model.getUniqueIdentifier());
-
- if (null == node) {
- node = new Node(model);
- nodes.put(model.getUniqueIdentifier(), node);
- }
-
- for (String referencedModelId : model.getDependentModelIds()) {
- // node might have been created by another model referencing it
- Node referencedNode = nodes.get(referencedModelId);
-
- if (null == referencedNode) {
- // create node
- AbstractModelArtifact referencedModel = versionIdToModelMap.get(referencedModelId);
- if (referencedModel == null) {
- Log.debug("ignoring " + referencedModelId);
- continue; // referenced model not supplied, no need to sort it
- }
- referencedNode = new Node(referencedModel);
- nodes.put(referencedModelId, referencedNode);
- }
- referencedNode.addEdge(node);
- }
- }
+ public final Node from;
+ public final Node to;
- return nodes.values();
- }
-
- /**
- * Sorts the given Nodes by order of dependency.
- *
- * @param originalList
- * the collection of nodes to be sorted
- * @return a sorted collection of the given nodes
- */
- private Collection<Node> sortNodes(Collection<Node> unsortedNodes) {
- // L <- Empty list that will contain the sorted elements
- ArrayList<Node> nodeList = new ArrayList<Node>();
-
- // S <- Set of all nodes with no incoming edges
- HashSet<Node> nodeSet = new HashSet<Node>();
- for (Node unsortedNode : unsortedNodes) {
- if (unsortedNode.inEdges.size() == 0) {
- nodeSet.add(unsortedNode);
- }
+ public Edge(Node from, Node to) {
+ this.from = from;
+ this.to = to;
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (obj == null || this.getClass() != obj.getClass()) {
+ return false;
+ }
+ Edge edge = (Edge) obj;
+ return edge.from == from && edge.to == to;
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(this.from, this.to);
+ }
}
- // while S is non-empty do
- while (!nodeSet.isEmpty()) {
- // remove a node n from S
- Node node = nodeSet.iterator().next();
- nodeSet.remove(node);
+ /**
+ * Returns the list of models sorted by order of dependency.
+ *
+ * @param originalList the list that needs to be sorted
+ * @return a list of sorted models
+ */
+ public List<Artifact> sort(List<Artifact> originalList) {
- // insert n into L
- nodeList.add(node);
+ if (originalList.size() <= 1) {
+ return originalList;
+ }
- // for each node m with an edge e from n to m do
- for (Iterator<Edge> it = node.outEdges.iterator(); it.hasNext();) {
- // remove edge e from the graph
- Edge edge = it.next();
- Node to = edge.to;
- it.remove();// Remove edge from n
- to.inEdges.remove(edge);// Remove edge from m
+ Collection<Node> nodes = createNodes(originalList);
+ Collection<Node> sortedNodes = sortNodes(nodes);
- // if m has no other incoming edges then insert m into S
- if (to.inEdges.isEmpty()) {
- nodeSet.add(to);
+ List<Artifact> sortedModelsList = new ArrayList<>(sortedNodes.size());
+ for (Node node : sortedNodes) {
+ sortedModelsList.add(node.model);
}
- }
- }
- // Check to see if all edges are removed
- boolean cycle = false;
- for (Node node : unsortedNodes) {
- if (!node.inEdges.isEmpty()) {
- cycle = true;
- break;
- }
+
+ return sortedModelsList;
}
- if (cycle) {
- throw new RuntimeException(
- "Circular dependency present between models, topological sort not possible");
+
+ /**
+ * Create nodes from the list of models and their dependencies.
+ *
+ * @param models what the nodes creation is based upon
+ * @return Collection of Node objects
+ */
+ private Collection<Node> createNodes(Collection<Artifact> models) {
+
+ // load list of models into a map, so we can later replace referenceIds with real Models
+ Map<String, AbstractModelArtifact> versionIdToModelMap = new HashMap<>();
+ for (Artifact art : models) {
+ AbstractModelArtifact ma = (AbstractModelArtifact) art;
+ versionIdToModelMap.put(ma.getUniqueIdentifier(), ma);
+ }
+
+ Map<String, Node> nodes = new HashMap<>();
+ // create a node for each model and its referenced models
+ for (Artifact art : models) {
+
+ AbstractModelArtifact model = (AbstractModelArtifact) art;
+
+ // node might have been created by another model referencing it
+ Node node = nodes.get(model.getUniqueIdentifier());
+
+ if (null == node) {
+ node = new Node(model);
+ nodes.put(model.getUniqueIdentifier(), node);
+ }
+
+ for (String referencedModelId : model.getDependentModelIds()) {
+ // node might have been created by another model referencing it
+ Node referencedNode = nodes.get(referencedModelId);
+
+ if (null == referencedNode) {
+ // create node
+ AbstractModelArtifact referencedModel = versionIdToModelMap.get(referencedModelId);
+ if (referencedModel == null) {
+ Log.debug("ignoring " + referencedModelId);
+ continue; // referenced model not supplied, no need to sort it
+ }
+ referencedNode = new Node(referencedModel);
+ nodes.put(referencedModelId, referencedNode);
+ }
+ referencedNode.addEdge(node);
+ }
+ }
+
+ return nodes.values();
}
- return nodeList;
- }
+ /**
+ * Sorts the given Nodes by order of dependency.
+ *
+ * @param unsortedNodes the collection of nodes to be sorted
+ * @return a sorted collection of the given nodes
+ */
+ private Collection<Node> sortNodes(Collection<Node> unsortedNodes) {
+ // L <- Empty list that will contain the sorted elements
+ List<Node> nodeList = new ArrayList<>();
+
+ // S <- Set of all nodes with no incoming edges
+ Set<Node> nodeSet = new HashSet<>();
+ for (Node unsortedNode : unsortedNodes) {
+ if (unsortedNode.inEdges.isEmpty()) {
+ nodeSet.add(unsortedNode);
+ }
+ }
+ // while S is non-empty do
+ while (!nodeSet.isEmpty()) {
+ // remove a node n from S
+ Node node = nodeSet.iterator().next();
+ nodeSet.remove(node);
+
+ // insert n into L
+ nodeList.add(node);
+
+ // for each node m with an edge e from n to m do
+ for (Iterator<Edge> it = node.outEdges.iterator(); it.hasNext();) {
+ // remove edge e from the graph
+ Edge edge = it.next();
+ Node to = edge.to;
+ it.remove();// Remove edge from n
+ to.inEdges.remove(edge);// Remove edge from m
+
+ // if m has no other incoming edges then insert m into S
+ if (to.inEdges.isEmpty()) {
+ nodeSet.add(to);
+ }
+ }
+ }
+ // Check to see if all edges are removed
+ boolean cycle = false;
+ for (Node node : unsortedNodes) {
+ if (!node.inEdges.isEmpty()) {
+ cycle = true;
+ break;
+ }
+ }
+ if (cycle) {
+ throw new RuntimeException("Circular dependency present between models, topological sort not possible");
+ }
+
+ return nodeList;
+ }
}
Code Review / aai / model-loader.git / blobdiff