Implement compact serialization for a set of discrete resources
This is for ONOS-4281.
Change-Id: I08a9fc4fd334c499c7a09d2960145743a798094e
diff --git a/utils/misc/src/main/java/org/onlab/util/ClosedOpenRange.java b/utils/misc/src/main/java/org/onlab/util/ClosedOpenRange.java
new file mode 100644
index 0000000..81dd07c
--- /dev/null
+++ b/utils/misc/src/main/java/org/onlab/util/ClosedOpenRange.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * 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 org.onlab.util;
+
+import com.google.common.annotations.Beta;
+import com.google.common.collect.DiscreteDomain;
+import com.google.common.collect.Range;
+
+import java.util.Objects;
+
+/**
+ * Represent a closed-open range.
+ * The primary user of this class is the ResourceService implementation.
+ */
+@Beta
+public final class ClosedOpenRange {
+ private final int lowerBound; // inclusive
+ private final int upperBound; // exclusive
+
+ /**
+ * Creates a range from a Guava's range.
+ *
+ * @param range Guava's range
+ * @return this range
+ */
+ public static ClosedOpenRange of(Range<Integer> range) {
+ return new ClosedOpenRange(
+ range.canonical(DiscreteDomain.integers()).lowerEndpoint(),
+ range.canonical(DiscreteDomain.integers()).upperEndpoint());
+ }
+
+ /**
+ * Create a range with a lower bound and an upper bound.
+ *
+ * @param lowerBound lower bound (inclusive)
+ * @param upperBound upper bound (exclusive)
+ * @return this range
+ */
+ public static ClosedOpenRange of(int lowerBound, int upperBound) {
+ return new ClosedOpenRange(lowerBound, upperBound);
+ }
+
+ private ClosedOpenRange(int lowerBound, int upperBound) {
+ this.lowerBound = lowerBound;
+ this.upperBound = upperBound;
+ }
+
+ /**
+ * Returns the lower bound.
+ *
+ * @return the lower bound
+ */
+ public int lowerBound() {
+ return lowerBound;
+ }
+
+ /**
+ * Returns the upper bound.
+ *
+ * @return the upper bound
+ */
+ public int upperBound() {
+ return upperBound;
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(lowerBound, upperBound);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+
+ if (!(obj instanceof ClosedOpenRange)) {
+ return false;
+ }
+
+ final ClosedOpenRange other = (ClosedOpenRange) obj;
+ return Objects.equals(this.lowerBound, other.lowerBound)
+ && Objects.equals(this.upperBound, other.upperBound);
+ }
+
+ @Override
+ public String toString() {
+ return "[" + lowerBound + ".." + upperBound + ")";
+ }
+}