Import Floodlight v0.90
diff --git a/src/ext/floodlight/src/main/java/net/floodlightcontroller/util/MultiIterator.java b/src/ext/floodlight/src/main/java/net/floodlightcontroller/util/MultiIterator.java
new file mode 100644
index 0000000..bcbc916
--- /dev/null
+++ b/src/ext/floodlight/src/main/java/net/floodlightcontroller/util/MultiIterator.java
@@ -0,0 +1,66 @@
+/**
+* Copyright 2012 Big Switch Networks, Inc.
+* Originally created by David Erickson, Stanford University
+*
+* 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.
+**/
+
+package net.floodlightcontroller.util;
+
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+
+/**
+ * Iterator over all values in an iterator of iterators
+ *
+ * @param <T> the type of elements returned by this iterator
+ */
+public class MultiIterator<T> implements Iterator<T> {
+ Iterator<Iterator<T>> subIterator;
+ Iterator<T> current = null;
+
+ public MultiIterator(Iterator<Iterator<T>> subIterator) {
+ super();
+ this.subIterator = subIterator;
+ }
+
+ @Override
+ public boolean hasNext() {
+ if (current == null) {
+ if (subIterator.hasNext()) {
+ current = subIterator.next();
+ } else {
+ return false;
+ }
+ }
+ while (!current.hasNext() && subIterator.hasNext()) {
+ current = subIterator.next();
+ }
+
+ return current.hasNext();
+ }
+
+ @Override
+ public T next() {
+ if (hasNext())
+ return current.next();
+ throw new NoSuchElementException();
+ }
+
+ @Override
+ public void remove() {
+ if (hasNext())
+ current.remove();
+ throw new NoSuchElementException();
+ }
+}