[Emu][onos-2603] - Implement LinkState Link attributes-Prefix Attribute
Change-Id: I87884b14b22495bb4e8f716765d4bb634f5cb270
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/attr/BgpPrefixAttrMetric.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/attr/BgpPrefixAttrMetric.java
new file mode 100755
index 0000000..0678b81
--- /dev/null
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/attr/BgpPrefixAttrMetric.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2015 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.onosproject.bgpio.types.attr;
+
+import java.util.Objects;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.onosproject.bgpio.exceptions.BGPParseException;
+import org.onosproject.bgpio.types.BGPErrorType;
+import org.onosproject.bgpio.types.BGPValueType;
+import org.onosproject.bgpio.util.Validation;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * Implements BGP prefix metric attribute.
+ */
+public class BgpPrefixAttrMetric implements BGPValueType {
+
+ protected static final Logger log = LoggerFactory
+ .getLogger(BgpPrefixAttrMetric.class);
+
+ public static final int ATTR_PREFIX_METRIC = 1155;
+ public static final int ATTR_PREFIX_LEN = 4;
+
+ /* TE Default Metric */
+ private final int linkPfxMetric;
+
+ /**
+ * Constructor to initialize value.
+ *
+ * @param linkPfxMetric Prefix Metric
+ */
+ public BgpPrefixAttrMetric(int linkPfxMetric) {
+ this.linkPfxMetric = linkPfxMetric;
+ }
+
+ /**
+ * Returns object of this class with specified values.
+ *
+ * @param linkPfxMetric Prefix Metric
+ * @return object of BgpPrefixAttrMetric
+ */
+ public static BgpPrefixAttrMetric of(final int linkPfxMetric) {
+ return new BgpPrefixAttrMetric(linkPfxMetric);
+ }
+
+ /**
+ * Reads the Prefix Metric.
+ *
+ * @param cb ChannelBuffer
+ * @return object of BgpPrefixAttrMetric
+ * @throws BGPParseException while parsing BgpPrefixAttrMetric
+ */
+ public static BgpPrefixAttrMetric read(ChannelBuffer cb)
+ throws BGPParseException {
+ int linkPfxMetric;
+
+ short lsAttrLength = cb.readShort(); // 4 Bytes
+
+ if ((lsAttrLength != ATTR_PREFIX_LEN)
+ || (cb.readableBytes() < lsAttrLength)) {
+ Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR,
+ BGPErrorType.ATTRIBUTE_LENGTH_ERROR,
+ lsAttrLength);
+ }
+
+ linkPfxMetric = cb.readInt();
+
+ return BgpPrefixAttrMetric.of(linkPfxMetric);
+ }
+
+ /**
+ * Returns the Prefix Metric.
+ *
+ * @return Prefix Metric
+ */
+ public int attrPfxMetric() {
+ return linkPfxMetric;
+ }
+
+ @Override
+ public short getType() {
+ return ATTR_PREFIX_METRIC;
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(linkPfxMetric);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+
+ if (obj instanceof BgpPrefixAttrMetric) {
+ BgpPrefixAttrMetric other = (BgpPrefixAttrMetric) obj;
+ return Objects.equals(linkPfxMetric, other.linkPfxMetric);
+ }
+ return false;
+ }
+
+ @Override
+ public int write(ChannelBuffer cb) {
+ // TODO This will be implemented in the next version
+ return 0;
+ }
+
+ @Override
+ public String toString() {
+ return MoreObjects.toStringHelper(getClass())
+ .add("linkPfxMetric", linkPfxMetric).toString();
+ }
+}