Added TierConstraint and MeteredConstraint
Change-Id: Iadc50c98dc0ba7092313f880df8055ab0e401c29
diff --git a/core/api/src/main/java/org/onosproject/net/intent/constraint/MeteredConstraint.java b/core/api/src/main/java/org/onosproject/net/intent/constraint/MeteredConstraint.java
new file mode 100644
index 0000000..584cd99
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/intent/constraint/MeteredConstraint.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2014-present Open Networking Foundation
+ *
+ * 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.onosproject.net.intent.constraint;
+
+import com.google.common.annotations.Beta;
+import org.onosproject.net.AnnotationKeys;
+import org.onosproject.net.Link;
+import org.onosproject.net.intent.ResourceContext;
+
+import java.util.Objects;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+/**
+ * Constraint that evaluates links based on the metered flag.
+ */
+@Beta
+public class MeteredConstraint extends BooleanConstraint {
+
+ private final boolean useMetered;
+
+ /**
+ * Creates a new constraint for requesting connectivity using or avoiding
+ * the metered links.
+ *
+ * @param metered indicates whether a metered link can be used.
+ */
+ public MeteredConstraint(boolean metered) {
+ this.useMetered = metered;
+ }
+
+ // Constructor for serialization
+ private MeteredConstraint() {
+ this.useMetered = false;
+ }
+
+ // doesn't use LinkResourceService
+ @Override
+ public boolean isValid(Link link, ResourceContext context) {
+ // explicitly call a method not depending on LinkResourceService
+ return isValid(link);
+ }
+
+ private boolean isValid(Link link) {
+ return !isMeteredLink(link) || useMetered;
+ }
+
+ private boolean isMeteredLink(Link link) {
+ return link.annotations().keys().contains(AnnotationKeys.METERED)
+ && Boolean.valueOf(link.annotations().value(AnnotationKeys.METERED));
+ }
+
+ /**
+ * Indicates if the constraint is metered or not.
+ *
+ * @return true if metered
+ */
+ public boolean isUseMetered() {
+ return useMetered;
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(useMetered);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj == null || getClass() != obj.getClass()) {
+ return false;
+ }
+ final MeteredConstraint other = (MeteredConstraint) obj;
+ return Objects.equals(this.useMetered, other.useMetered);
+ }
+
+ @Override
+ public String toString() {
+ return toStringHelper(this)
+ .add("metered", useMetered)
+ .toString();
+ }
+}