PCEP modificaton to support PCEP-LS

Change-Id: Ic829dd17b0398ad76ec412b4e8293de564b5b56b
diff --git a/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/LinkProtectionTypeSubTlv.java b/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/LinkProtectionTypeSubTlv.java
new file mode 100644
index 0000000..2fe60a3
--- /dev/null
+++ b/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/LinkProtectionTypeSubTlv.java
@@ -0,0 +1,142 @@
+/*
+ * 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.pcepio.types;
+
+import java.util.Objects;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.onosproject.pcepio.protocol.PcepVersion;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * Provide Link Protection Type.
+ */
+
+public class LinkProtectionTypeSubTlv implements PcepValueType {
+
+    /* Reference  :[RFC5307]/1.2
+     * 0                   1                   2                   3
+      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     |              Type=[TDB38]      |             Length=2         |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     |Protection Cap | Reserved      |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     */
+    protected static final Logger log = LoggerFactory.getLogger(LinkProtectionTypeSubTlv.class);
+
+    public static final short TYPE = 27;
+    public static final short LENGTH = 2;
+    private final byte protectionCap;
+    private final byte reserved;
+
+    /**
+     * Constructor to initialize protectionCap.
+     *
+     * @param protectionCap Protection Cap
+     */
+    public LinkProtectionTypeSubTlv(byte protectionCap) {
+        this.protectionCap = protectionCap;
+        this.reserved = 0;
+    }
+
+    /**
+     * Constructor to initialize protectionCap, reserved.
+     *
+     * @param protectionCap Protection Cap
+     * @param reserved Reserved value
+     */
+    public LinkProtectionTypeSubTlv(byte protectionCap, byte reserved) {
+        this.protectionCap = protectionCap;
+        this.reserved = reserved;
+    }
+
+    /**
+     * Returns Protection Cap.
+     *
+     * @return protectionCap Protection Cap
+     */
+    public byte getProtectionCap() {
+        return protectionCap;
+    }
+
+    @Override
+    public PcepVersion getVersion() {
+        return PcepVersion.PCEP_1;
+    }
+
+    @Override
+    public short getType() {
+        return TYPE;
+    }
+
+    @Override
+    public short getLength() {
+        return LENGTH;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(protectionCap, reserved);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof LinkProtectionTypeSubTlv) {
+            LinkProtectionTypeSubTlv other = (LinkProtectionTypeSubTlv) obj;
+            return Objects.equals(protectionCap, other.protectionCap) && Objects.equals(reserved, other.reserved);
+        }
+
+        return false;
+    }
+
+    @Override
+    public int write(ChannelBuffer c) {
+        int iLenStartIndex = c.writerIndex();
+        c.writeShort(TYPE);
+        c.writeShort(LENGTH);
+        c.writeByte(protectionCap);
+        c.writeByte(reserved);
+        return c.writerIndex() - iLenStartIndex;
+    }
+
+    /**
+     * Reads the channel buffer and returns object of LinkProtectionTypeTlv.
+     *
+     * @param c input channel buffer
+     * @return object of LinkProtectionTypeTlv
+     */
+    public static PcepValueType read(ChannelBuffer c) {
+        byte protectionCap = c.readByte();
+        byte reserved = c.readByte();
+        return new LinkProtectionTypeSubTlv(protectionCap, reserved);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("Type", TYPE)
+                .add("Length", LENGTH)
+                .add("ProtectionCap", protectionCap)
+                .toString();
+    }
+}