Implement IntentMap and IntentOperation
Change-Id: I8ef5ddb37ae2694a984c190465e86026fa643e7b
diff --git a/src/main/java/net/onrc/onos/intent/IntentMap.java b/src/main/java/net/onrc/onos/intent/IntentMap.java
new file mode 100644
index 0000000..f9d8b9f
--- /dev/null
+++ b/src/main/java/net/onrc/onos/intent/IntentMap.java
@@ -0,0 +1,109 @@
+package net.onrc.onos.intent;
+
+import java.util.Collection;
+import java.util.EventListener;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map.Entry;
+
+import net.onrc.onos.intent.Intent.IntentState;
+
+/**
+ * @author Toshio Koide (t-koide@onlab.us)
+ */
+public class IntentMap {
+ public enum ChangedEventType {
+ /**
+ * Added new intent.
+ */
+ ADDED,
+
+ /**
+ * Removed existing intent.
+ * The specified intent is an instance of Intent class (not a child class)
+ * Only id and state are valid.
+ */
+ REMOVED,
+
+ /**
+ * Changed state of existing intent.
+ * The specified intent is an instance of Intent class (not a child class)
+ * Only id and state are valid.
+ */
+ STATE_CHANGED,
+ }
+
+ public class ChangedEvent {
+ public ChangedEvent(ChangedEventType eventType, Intent intent) {
+ this.eventType = eventType;
+ this.intent = intent;
+ }
+ public ChangedEventType eventType;
+ public Intent intent;
+ }
+
+ public interface ChangedListener extends EventListener {
+ void intentsChange(LinkedList<ChangedEvent> events);
+ }
+
+ private HashSet<ChangedListener> listeners = new HashSet<>();
+ protected HashMap<String, Intent> intents = new HashMap<>();
+
+ public void executeOperations(List<IntentOperation> operations) {
+ LinkedList<ChangedEvent> events = new LinkedList<>();
+ for (IntentOperation operation: operations) {
+ switch (operation.operator) {
+ case ADD:
+ intents.put(operation.intent.getId(), operation.intent);
+ events.add(new ChangedEvent(ChangedEventType.ADDED, operation.intent));
+ break;
+ case REMOVE:
+ Intent intent = intents.get(operation.intent.getId());
+ if (intent == null) {
+ // TODO throw exception
+ }
+ else {
+ intent.setState(Intent.IntentState.DEL_REQ);
+ events.add(new ChangedEvent(ChangedEventType.STATE_CHANGED,
+ new Intent(intent.getId(), Intent.IntentState.DEL_REQ)));
+ }
+ break;
+ }
+ }
+ for (ChangedListener listener: listeners) {
+ listener.intentsChange(events);
+ }
+ }
+
+ public void purge() {
+ Iterator<Entry<String, Intent>> i = intents.entrySet().iterator();
+ while (i.hasNext()) {
+ Entry<String, Intent> entry = i.next();
+ Intent intent = entry.getValue();
+ if (intent.getState() == IntentState.DEL_ACK
+ || intent.getState() == IntentState.INST_NACK) {
+ i.remove();
+ }
+ }
+ }
+
+ public Collection<Intent> getAllIntents() {
+ return intents.values();
+ }
+
+ public Intent getIntent(String key) {
+ return intents.get(key);
+ }
+
+
+ public void addChangeListener(ChangedListener listener) {
+ listeners.add(listener);
+ }
+
+ public void removeChangedListener(ChangedListener listener) {
+ listeners.remove(listener);
+ }
+}