Implementation of PcInitate and PcUpdate messages

Change-Id: I746a5860a8b4a8022d747a02075ed3237741c53a
diff --git a/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/PcepRsvpSpecObjHeader.java b/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/PcepRsvpSpecObjHeader.java
new file mode 100644
index 0000000..b39bfde
--- /dev/null
+++ b/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/PcepRsvpSpecObjHeader.java
@@ -0,0 +1,165 @@
+/*
+ * 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 org.jboss.netty.buffer.ChannelBuffer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * Provides PcepRsvpObjectHeader.
+ */
+public class PcepRsvpSpecObjHeader {
+
+    /*
+    0             1              2             3
+    +-------------+-------------+-------------+-------------+
+    |       Length (bytes)      |  Class-Num  |   C-Type    |
+    +-------------+-------------+-------------+-------------+
+    |                                                       |
+    //                  (Object contents)                   //
+    |                                                       |
+    +-------------+-------------+-------------+-------------+
+
+              ERROR_SPEC object Header
+     */
+
+    protected static final Logger log = LoggerFactory.getLogger(PcepRsvpSpecObjHeader.class);
+
+    private short objLen;
+    private byte objClassNum;
+    private byte objClassType;
+
+    /**
+     * Constructor to initialize length, class num and type.
+     *
+     * @param objLen object length
+     * @param objClassNum pcep rsvp error spec object class num
+     * @param objClassType pcep rsvp error spec object class type
+     */
+    public PcepRsvpSpecObjHeader(short objLen, byte objClassNum, byte objClassType) {
+        this.objLen = objLen;
+        this.objClassNum = objClassNum;
+        this.objClassType = objClassType;
+    }
+
+    /**
+     * Sets the Class num.
+     *
+     * @param value pcep rsvp error spec object class num
+     */
+    public void setObjClassNum(byte value) {
+        this.objClassNum = value;
+    }
+
+    /**
+     * Sets the Class type.
+     *
+     * @param value pcep rsvp error spec object class type
+     */
+    public void setObjClassType(byte value) {
+        this.objClassType = value;
+    }
+
+    /**
+     * Sets the Class Length.
+     *
+     * @param value pcep rsvp error spec object length
+     */
+    public void setObjLen(short value) {
+        this.objLen = value;
+    }
+
+    /**
+     * Returns Object Length.
+     *
+     * @return objLen pcep rsvp error spec object length
+     */
+    public short getObjLen() {
+        return this.objLen;
+    }
+
+    /**
+     * Returns Object num.
+     *
+     * @return objClassNum pcep rsvp error spec object class num
+     */
+    public byte getObjClassNum() {
+        return this.objClassNum;
+    }
+
+    /**
+     * Returns Object type.
+     *
+     * @return objClassType pcep rsvp error spec object class type
+     */
+    public byte getObjClassType() {
+        return this.objClassType;
+    }
+
+    /**
+     * Writes the byte stream of PcepRsvpObjectHeader to channel buffer.
+     *
+     * @param bb of type channel buffer
+     * @return object length index
+     */
+    public int write(ChannelBuffer bb) {
+        int objLenIndex = bb.writerIndex();
+        bb.writeShort(objLen);
+        bb.writeByte(objClassNum);
+        bb.writeByte(objClassType);
+        return bb.writerIndex() - objLenIndex;
+    }
+
+    /**
+     * Reads the PcepRsvpObjectHeader.
+     *
+     * @param bb of type channel buffer
+     * @return PcepRsvpObjectHeader
+     */
+    public static PcepRsvpSpecObjHeader read(ChannelBuffer bb) {
+        byte objClassNum;
+        byte objClassType;
+        short objLen;
+        objLen = bb.readShort();
+        objClassNum = bb.readByte();
+        objClassType = bb.readByte();
+
+        return new PcepRsvpSpecObjHeader(objLen, objClassNum, objClassType);
+    }
+
+    /**
+     * Prints the attribute of PcepRsvpObjectHeader.
+     */
+    public void print() {
+
+        log.debug("PcepObjectHeader");
+        log.debug("Object Class-Num: " + objClassNum);
+        log.debug("Object C-Type: " + objClassType);
+        log.debug("Object Length: " + objLen);
+    }
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("Object Class-Num: " , objClassNum)
+                .add("Object C-Type: " , objClassType)
+                .add("Object Length: " , objLen)
+                .toString();
+    }
+}