Readers, writers and factories for subscription and transport updates.

components/net/sf/briar/protocol/SubscriptionReader.java

@@ -0,0 +1,38 @@
+package net.sf.briar.protocol;
+
+import java.io.IOException;
+import java.util.Collection;
+
+import net.sf.briar.api.protocol.Group;
+import net.sf.briar.api.protocol.Subscriptions;
+import net.sf.briar.api.protocol.Tags;
+import net.sf.briar.api.serial.ObjectReader;
+import net.sf.briar.api.serial.Reader;
+
+class SubscriptionReader implements ObjectReader<Subscriptions> {
+
+	private final ObjectReader<Group> groupReader;
+	private final SubscriptionFactory subscriptionFactory;
+
+	SubscriptionReader(ObjectReader<Group> groupReader,
+			SubscriptionFactory subscriptionFactory) {
+		this.groupReader = groupReader;
+		this.subscriptionFactory = subscriptionFactory;
+	}
+
+	public Subscriptions readObject(Reader r) throws IOException {
+		// Initialise the consumer
+		CountingConsumer counting =
+			new CountingConsumer(Subscriptions.MAX_SIZE);
+		// Read the data
+		r.addConsumer(counting);
+		r.readUserDefinedTag(Tags.SUBSCRIPTIONS);
+		r.addObjectReader(Tags.GROUP, groupReader);
+		Collection<Group> subs = r.readList(Group.class);
+		r.removeObjectReader(Tags.GROUP);
+		long timestamp = r.readInt64();
+		r.removeConsumer(counting);
+		// Build and return the subscriptions update
+		return subscriptionFactory.createSubscriptions(subs, timestamp);
+	}
+}