diff --git a/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepEroObjectVer1.java b/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepEroObjectVer1.java
index 86f13bb..131d657 100644
--- a/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepEroObjectVer1.java
+++ b/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepEroObjectVer1.java
@@ -1,406 +1,406 @@
-/*
- * 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.protocol.ver1;
-
-import java.util.LinkedList;
-import java.util.ListIterator;
-
-import org.jboss.netty.buffer.ChannelBuffer;
-import org.onosproject.pcepio.exceptions.PcepParseException;
-import org.onosproject.pcepio.protocol.PcepEroObject;
-import org.onosproject.pcepio.types.AutonomousSystemTlv;
-import org.onosproject.pcepio.types.IPv4SubObject;
-import org.onosproject.pcepio.types.IPv6SubObject;
-import org.onosproject.pcepio.types.PathKeySubObject;
-import org.onosproject.pcepio.types.PcepErrorDetailInfo;
-import org.onosproject.pcepio.types.PcepObjectHeader;
-import org.onosproject.pcepio.types.PcepValueType;
-import org.onosproject.pcepio.types.SrEroSubObject;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import com.google.common.base.MoreObjects;
-
-/**
- * Provides PCEP Ero Object.
- */
-public class PcepEroObjectVer1 implements PcepEroObject {
-    /*
-     * rfc3209
-      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
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     | Object-Class  |   OT  |Res|P|I|   Object Length (bytes)       |
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     |                                                               |
-     //                        (Subobjects)                          //
-     |                                                               |
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-     If a Path message contains multiple EXPLICIT_ROUTE objects, only the
-     first object is meaningful.  Subsequent EXPLICIT_ROUTE objects MAY be
-     ignored and SHOULD NOT be propagated.
-
-     In current implementation, only strict hops are supported. So,
-     empty ERO with no sub-objects is considered illegal.
-
-     Subobjects:
-      0                   1
-      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------------//----------------+
-     |L|    Type     |     Length    | (Subobject contents)          |
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------------//----------------+
-
-      L
-
-         The L bit is an attribute of the subobject.  The L bit is set
-         if the subobject represents a loose hop in the explicit route.
-         If the bit is not set, the subobject represents a strict hop in
-         the explicit route.
-
-      Type
-
-         The Type indicates the type of contents of the subobject.
-
-
-      Subobject 1: IPv4 address
-
-      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
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     |L|    Type     |     Length    | IPv4 address (4 bytes)        |
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     | IPv4 address (continued)      | Prefix Length |      Resvd    |
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-     Subobject 2:  IPv6 Prefix
-
-      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
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     |L|    Type     |     Length    | IPv6 address (16 bytes)       |
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     | IPv6 address (continued)                                      |
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     | IPv6 address (continued)                                      |
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     | IPv6 address (continued)                                      |
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     | IPv6 address (continued)      | Prefix Length |      Resvd    |
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-     Subobject 3:  Autonomous System Number
-
-     The contents of an Autonomous System (AS) number subobject are a 2-
-     octet AS number.  The abstract node represented by this subobject is
-     the set of nodes belonging to the autonomous system.
-
-     The length of the AS number subobject is 4 octets.
-
-     Subobject 4: PATH_KEY_32_BIT_SUB_OBJ_TYPE:
-
-      Pathkey subobject(RFC 5520):
-      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
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     |L|    Type     |     Length    |           Path-Key            |
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     |                         PCE ID (4 bytes)                      |
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-     Subobject 5: SR_ERO_SUB_OBJ_TYPE:
-
-       SR-ERO subobject: (draft-ietf-pce-segment-routing-00)
-      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
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     |L|    Type     |     Length    |  ST   |     Flags     |F|S|C|M|
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     |                              SID                              |
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     //                        NAI (variable)                       //
-     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-     */
-
-    protected static final Logger log = LoggerFactory.getLogger(PcepEroObjectVer1.class);
-
-    public static final byte ERO_OBJ_TYPE = 1;
-    public static final byte ERO_OBJ_CLASS = 7;
-    public static final byte ERO_OBJECT_VERSION = 1;
-    public static final short ERO_OBJ_MINIMUM_LENGTH = 12;
-    public static final byte IPV4_TYPE = 1;
-    public static final byte PATH_KEY_32_BIT_SUB_OBJ_TYPE = 64;
-    public static final int LABEL_SUB_OBJ_TYPE = 3;
-    public static final int SR_ERO_SUB_OBJ_TYPE = 96;
-    public static final int OBJECT_HEADER_LENGTH = 4;
-    public static final int YTYPE_SHIFT_VALUE = 0x7F;
-
-    static final PcepObjectHeader DEFAULT_ERO_OBJECT_HEADER = new PcepObjectHeader(ERO_OBJ_CLASS, ERO_OBJ_TYPE,
-            PcepObjectHeader.REQ_OBJ_OPTIONAL_PROCESS, PcepObjectHeader.RSP_OBJ_PROCESSED, ERO_OBJ_MINIMUM_LENGTH);
-
-    private PcepObjectHeader eroObjHeader;
-    private LinkedList<PcepValueType> llSubObjects = new LinkedList<PcepValueType>();
-
-    /**
-     * reset variables.
-     */
-    public PcepEroObjectVer1() {
-        this.eroObjHeader = null;
-        this.llSubObjects = null;
-    }
-
-    /**
-     * Constructor to initialize parameters of ERO object.
-     *
-     * @param eroObjHeader ERO object header
-     * @param llSubObjects list of sub objects.
-     */
-    public PcepEroObjectVer1(PcepObjectHeader eroObjHeader, LinkedList<PcepValueType> llSubObjects) {
-
-        this.eroObjHeader = eroObjHeader;
-        this.llSubObjects = llSubObjects;
-    }
-
-    /**
-     * Returns ERO object header.
-     *
-     * @return eroObjHeader ERO object header
-     */
-    public PcepObjectHeader getEroObjHeader() {
-        return this.eroObjHeader;
-    }
-
-    /**
-     * Sets Object Header.
-     *
-     * @param obj ERO object header
-     */
-    public void setEroObjHeader(PcepObjectHeader obj) {
-        this.eroObjHeader = obj;
-    }
-
-    @Override
-    public LinkedList<PcepValueType> getSubObjects() {
-        return this.llSubObjects;
-    }
-
-    @Override
-    public void setSubObjects(LinkedList<PcepValueType> llSubObjects) {
-        this.llSubObjects = llSubObjects;
-    }
-
-    /**
-     * Reads from channel buffer and returns object of PcepEroObject.
-     *
-     * @param cb channel buffer.
-     * @return  object of PcepEroObject
-     * @throws PcepParseException when ERO object is not present in channel buffer
-     */
-    public static PcepEroObject read(ChannelBuffer cb) throws PcepParseException {
-
-        PcepObjectHeader eroObjHeader;
-        LinkedList<PcepValueType> llSubObjects = new LinkedList<PcepValueType>();
-
-        eroObjHeader = PcepObjectHeader.read(cb);
-
-        if (eroObjHeader.getObjClass() != PcepEroObjectVer1.ERO_OBJ_CLASS) {
-            log.debug("ErrorType:" + PcepErrorDetailInfo.ERROR_TYPE_6 + " ErrorValue:"
-                    + PcepErrorDetailInfo.ERROR_VALUE_9);
-            throw new PcepParseException(PcepErrorDetailInfo.ERROR_TYPE_6, PcepErrorDetailInfo.ERROR_VALUE_9);
-        }
-
-        if (eroObjHeader.getObjLen() > OBJECT_HEADER_LENGTH) {
-            ChannelBuffer tempCb = cb.readBytes(eroObjHeader.getObjLen() - OBJECT_HEADER_LENGTH);
-            llSubObjects = parseSubObjects(tempCb);
-        }
-        return new PcepEroObjectVer1(eroObjHeader, llSubObjects);
-    }
-
-    /**
-     * Parse list of Sub Objects.
-     *
-     * @param cb channel buffer
-     * @return list of Sub Objects
-     * @throws PcepParseException when fails to parse sub object list
-     */
-    protected static LinkedList<PcepValueType> parseSubObjects(ChannelBuffer cb) throws PcepParseException {
-
-        LinkedList<PcepValueType> llSubObjects = new LinkedList<PcepValueType>();
-
-        while (0 < cb.readableBytes()) {
-
-            //check the Type of the TLV
-            byte yType = cb.readByte();
-            yType = (byte) (yType & (YTYPE_SHIFT_VALUE));
-            byte hLength = cb.readByte();
-
-            PcepValueType subObj;
-
-            switch (yType) {
-
-            case IPv4SubObject.TYPE:
-                subObj = IPv4SubObject.read(cb);
-                break;
-            case IPv6SubObject.TYPE:
-                byte[] ipv6Value = new byte[IPv6SubObject.VALUE_LENGTH];
-                cb.readBytes(ipv6Value, 0, IPv6SubObject.VALUE_LENGTH);
-                subObj = new IPv6SubObject(ipv6Value);
-                break;
-            case AutonomousSystemTlv.TYPE:
-                subObj = AutonomousSystemTlv.read(cb);
-                break;
-            case PathKeySubObject.TYPE:
-                subObj = PathKeySubObject.read(cb);
-                break;
-            case SrEroSubObject.TYPE:
-                subObj = SrEroSubObject.read(cb);
-                break;
-            default:
-                throw new PcepParseException("Unexpected sub object. Type: " + (int) yType);
-            }
-            // Check for the padding
-            int pad = hLength % 4;
-            if (0 < pad) {
-                pad = 4 - pad;
-                if (pad <= cb.readableBytes()) {
-                    cb.skipBytes(pad);
-                }
-            }
-
-            llSubObjects.add(subObj);
-        }
-        if (0 < cb.readableBytes()) {
-            throw new PcepParseException("Subobject parsing error. Extra bytes received.");
-        }
-        return llSubObjects;
-    }
-
-    @Override
-    public int write(ChannelBuffer cb) throws PcepParseException {
-
-        //write Object header
-        int objStartIndex = cb.writerIndex();
-
-        int objLenIndex = eroObjHeader.write(cb);
-
-        if (objLenIndex <= 0) {
-            throw new PcepParseException("Failed to write ERO object header. Index " + objLenIndex);
-        }
-
-        ListIterator<PcepValueType> listIterator = llSubObjects.listIterator();
-
-        while (listIterator.hasNext()) {
-            listIterator.next().write(cb);
-        }
-
-        //Update object length now
-        int length = cb.writerIndex() - objStartIndex;
-        cb.setShort(objLenIndex, (short) length);
-        //will be helpful during print().
-        eroObjHeader.setObjLen((short) length);
-
-        //As per RFC the length of object should be multiples of 4
-        int pad = length % 4;
-
-        if (pad != 0) {
-            pad = 4 - pad;
-            for (int i = 0; i < pad; i++) {
-                cb.writeByte((byte) 0);
-            }
-            length = length + pad;
-        }
-
-        objLenIndex = cb.writerIndex();
-        return objLenIndex;
-    }
-
-    /**
-     * Builder class for PCEP ERO object.
-     */
-    public static class Builder implements PcepEroObject.Builder {
-
-        private boolean bIsHeaderSet = false;
-
-        private boolean bIsPFlagSet = false;
-        private boolean bPFlag;
-
-        private boolean bIsIFlagSet = false;
-        private boolean bIFlag;
-
-        private PcepObjectHeader eroObjHeader;
-        LinkedList<PcepValueType> llSubObjects = new LinkedList<PcepValueType>();
-
-        @Override
-        public PcepEroObject build() {
-
-            PcepObjectHeader eroObjHeader = this.bIsHeaderSet ? this.eroObjHeader : DEFAULT_ERO_OBJECT_HEADER;
-
-            if (bIsPFlagSet) {
-                eroObjHeader.setPFlag(bPFlag);
-            }
-
-            if (bIsIFlagSet) {
-                eroObjHeader.setIFlag(bIFlag);
-            }
-
-            return new PcepEroObjectVer1(eroObjHeader, this.llSubObjects);
-        }
-
-        @Override
-        public PcepObjectHeader getEroObjHeader() {
-            return this.eroObjHeader;
-        }
-
-        @Override
-        public Builder setEroObjHeader(PcepObjectHeader obj) {
-            this.eroObjHeader = obj;
-            this.bIsHeaderSet = true;
-            return this;
-        }
-
-        @Override
-        public LinkedList<PcepValueType> getSubObjects() {
-            return this.llSubObjects;
-        }
-
-        @Override
-        public Builder setSubObjects(LinkedList<PcepValueType> llSubObjects) {
-            this.llSubObjects = llSubObjects;
-            return this;
-        }
-
-        @Override
-        public Builder setPFlag(boolean value) {
-            this.bPFlag = value;
-            this.bIsPFlagSet = true;
-            return this;
-        }
-
-        @Override
-        public Builder setIFlag(boolean value) {
-            this.bIFlag = value;
-            this.bIsIFlagSet = true;
-            return this;
-        }
-    }
-
-    @Override
-    public String toString() {
-        return MoreObjects.toStringHelper(getClass()).add("EroObjHeader", eroObjHeader).add("SubObjects", llSubObjects)
-                .toString();
-    }
-}
+/*
+ * 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.protocol.ver1;
+
+import java.util.LinkedList;
+import java.util.ListIterator;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.onosproject.pcepio.exceptions.PcepParseException;
+import org.onosproject.pcepio.protocol.PcepEroObject;
+import org.onosproject.pcepio.types.AutonomousSystemTlv;
+import org.onosproject.pcepio.types.IPv4SubObject;
+import org.onosproject.pcepio.types.IPv6SubObject;
+import org.onosproject.pcepio.types.PathKeySubObject;
+import org.onosproject.pcepio.types.PcepErrorDetailInfo;
+import org.onosproject.pcepio.types.PcepObjectHeader;
+import org.onosproject.pcepio.types.PcepValueType;
+import org.onosproject.pcepio.types.SrEroSubObject;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * Provides PCEP Ero Object.
+ */
+public class PcepEroObjectVer1 implements PcepEroObject {
+    /*
+     * rfc3209
+      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
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     | Object-Class  |   OT  |Res|P|I|   Object Length (bytes)       |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     |                                                               |
+     //                        (Subobjects)                          //
+     |                                                               |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+     If a Path message contains multiple EXPLICIT_ROUTE objects, only the
+     first object is meaningful.  Subsequent EXPLICIT_ROUTE objects MAY be
+     ignored and SHOULD NOT be propagated.
+
+     In current implementation, only strict hops are supported. So,
+     empty ERO with no sub-objects is considered illegal.
+
+     Subobjects:
+      0                   1
+      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------------//----------------+
+     |L|    Type     |     Length    | (Subobject contents)          |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------------//----------------+
+
+      L
+
+         The L bit is an attribute of the subobject.  The L bit is set
+         if the subobject represents a loose hop in the explicit route.
+         If the bit is not set, the subobject represents a strict hop in
+         the explicit route.
+
+      Type
+
+         The Type indicates the type of contents of the subobject.
+
+
+      Subobject 1: IPv4 address
+
+      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
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     |L|    Type     |     Length    | IPv4 address (4 bytes)        |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     | IPv4 address (continued)      | Prefix Length |      Resvd    |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+     Subobject 2:  IPv6 Prefix
+
+      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
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     |L|    Type     |     Length    | IPv6 address (16 bytes)       |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     | IPv6 address (continued)                                      |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     | IPv6 address (continued)                                      |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     | IPv6 address (continued)                                      |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     | IPv6 address (continued)      | Prefix Length |      Resvd    |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+     Subobject 3:  Autonomous System Number
+
+     The contents of an Autonomous System (AS) number subobject are a 2-
+     octet AS number.  The abstract node represented by this subobject is
+     the set of nodes belonging to the autonomous system.
+
+     The length of the AS number subobject is 4 octets.
+
+     Subobject 4: PATH_KEY_32_BIT_SUB_OBJ_TYPE:
+
+      Pathkey subobject(RFC 5520):
+      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
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     |L|    Type     |     Length    |           Path-Key            |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     |                         PCE ID (4 bytes)                      |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+     Subobject 5: SR_ERO_SUB_OBJ_TYPE:
+
+       SR-ERO subobject: (draft-ietf-pce-segment-routing-00)
+      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
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     |L|    Type     |     Length    |  ST   |     Flags     |F|S|C|M|
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     |                              SID                              |
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     //                        NAI (variable)                       //
+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     */
+
+    protected static final Logger log = LoggerFactory.getLogger(PcepEroObjectVer1.class);
+
+    public static final byte ERO_OBJ_TYPE = 1;
+    public static final byte ERO_OBJ_CLASS = 7;
+    public static final byte ERO_OBJECT_VERSION = 1;
+    public static final short ERO_OBJ_MINIMUM_LENGTH = 12;
+    public static final byte IPV4_TYPE = 1;
+    public static final byte PATH_KEY_32_BIT_SUB_OBJ_TYPE = 64;
+    public static final int LABEL_SUB_OBJ_TYPE = 3;
+    public static final int SR_ERO_SUB_OBJ_TYPE = 96;
+    public static final int OBJECT_HEADER_LENGTH = 4;
+    public static final int YTYPE_SHIFT_VALUE = 0x7F;
+
+    static final PcepObjectHeader DEFAULT_ERO_OBJECT_HEADER = new PcepObjectHeader(ERO_OBJ_CLASS, ERO_OBJ_TYPE,
+            PcepObjectHeader.REQ_OBJ_OPTIONAL_PROCESS, PcepObjectHeader.RSP_OBJ_PROCESSED, ERO_OBJ_MINIMUM_LENGTH);
+
+    private PcepObjectHeader eroObjHeader;
+    private LinkedList<PcepValueType> llSubObjects = new LinkedList<PcepValueType>();
+
+    /**
+     * reset variables.
+     */
+    public PcepEroObjectVer1() {
+        this.eroObjHeader = null;
+        this.llSubObjects = null;
+    }
+
+    /**
+     * Constructor to initialize parameters of ERO object.
+     *
+     * @param eroObjHeader ERO object header
+     * @param llSubObjects list of sub objects.
+     */
+    public PcepEroObjectVer1(PcepObjectHeader eroObjHeader, LinkedList<PcepValueType> llSubObjects) {
+
+        this.eroObjHeader = eroObjHeader;
+        this.llSubObjects = llSubObjects;
+    }
+
+    /**
+     * Returns ERO object header.
+     *
+     * @return eroObjHeader ERO object header
+     */
+    public PcepObjectHeader getEroObjHeader() {
+        return this.eroObjHeader;
+    }
+
+    /**
+     * Sets Object Header.
+     *
+     * @param obj ERO object header
+     */
+    public void setEroObjHeader(PcepObjectHeader obj) {
+        this.eroObjHeader = obj;
+    }
+
+    @Override
+    public LinkedList<PcepValueType> getSubObjects() {
+        return this.llSubObjects;
+    }
+
+    @Override
+    public void setSubObjects(LinkedList<PcepValueType> llSubObjects) {
+        this.llSubObjects = llSubObjects;
+    }
+
+    /**
+     * Reads from channel buffer and returns object of PcepEroObject.
+     *
+     * @param cb channel buffer.
+     * @return  object of PcepEroObject
+     * @throws PcepParseException when ERO object is not present in channel buffer
+     */
+    public static PcepEroObject read(ChannelBuffer cb) throws PcepParseException {
+
+        PcepObjectHeader eroObjHeader;
+        LinkedList<PcepValueType> llSubObjects = new LinkedList<PcepValueType>();
+
+        eroObjHeader = PcepObjectHeader.read(cb);
+
+        if (eroObjHeader.getObjClass() != PcepEroObjectVer1.ERO_OBJ_CLASS) {
+            log.debug("ErrorType:" + PcepErrorDetailInfo.ERROR_TYPE_6 + " ErrorValue:"
+                    + PcepErrorDetailInfo.ERROR_VALUE_9);
+            throw new PcepParseException(PcepErrorDetailInfo.ERROR_TYPE_6, PcepErrorDetailInfo.ERROR_VALUE_9);
+        }
+
+        if (eroObjHeader.getObjLen() > OBJECT_HEADER_LENGTH) {
+            ChannelBuffer tempCb = cb.readBytes(eroObjHeader.getObjLen() - OBJECT_HEADER_LENGTH);
+            llSubObjects = parseSubObjects(tempCb);
+        }
+        return new PcepEroObjectVer1(eroObjHeader, llSubObjects);
+    }
+
+    /**
+     * Parse list of Sub Objects.
+     *
+     * @param cb channel buffer
+     * @return list of Sub Objects
+     * @throws PcepParseException when fails to parse sub object list
+     */
+    protected static LinkedList<PcepValueType> parseSubObjects(ChannelBuffer cb) throws PcepParseException {
+
+        LinkedList<PcepValueType> llSubObjects = new LinkedList<PcepValueType>();
+
+        while (0 < cb.readableBytes()) {
+
+            //check the Type of the TLV
+            byte yType = cb.readByte();
+            yType = (byte) (yType & (YTYPE_SHIFT_VALUE));
+            byte hLength = cb.readByte();
+
+            PcepValueType subObj;
+
+            switch (yType) {
+
+            case IPv4SubObject.TYPE:
+                subObj = IPv4SubObject.read(cb);
+                break;
+            case IPv6SubObject.TYPE:
+                byte[] ipv6Value = new byte[IPv6SubObject.VALUE_LENGTH];
+                cb.readBytes(ipv6Value, 0, IPv6SubObject.VALUE_LENGTH);
+                subObj = new IPv6SubObject(ipv6Value);
+                break;
+            case AutonomousSystemTlv.TYPE:
+                subObj = AutonomousSystemTlv.read(cb);
+                break;
+            case PathKeySubObject.TYPE:
+                subObj = PathKeySubObject.read(cb);
+                break;
+            case SrEroSubObject.TYPE:
+                subObj = SrEroSubObject.read(cb);
+                break;
+            default:
+                throw new PcepParseException("Unexpected sub object. Type: " + (int) yType);
+            }
+            // Check for the padding
+            int pad = hLength % 4;
+            if (0 < pad) {
+                pad = 4 - pad;
+                if (pad <= cb.readableBytes()) {
+                    cb.skipBytes(pad);
+                }
+            }
+
+            llSubObjects.add(subObj);
+        }
+        if (0 < cb.readableBytes()) {
+            throw new PcepParseException("Subobject parsing error. Extra bytes received.");
+        }
+        return llSubObjects;
+    }
+
+    @Override
+    public int write(ChannelBuffer cb) throws PcepParseException {
+
+        //write Object header
+        int objStartIndex = cb.writerIndex();
+
+        int objLenIndex = eroObjHeader.write(cb);
+
+        if (objLenIndex <= 0) {
+            throw new PcepParseException("Failed to write ERO object header. Index " + objLenIndex);
+        }
+
+        ListIterator<PcepValueType> listIterator = llSubObjects.listIterator();
+
+        while (listIterator.hasNext()) {
+            listIterator.next().write(cb);
+        }
+
+        //Update object length now
+        int length = cb.writerIndex() - objStartIndex;
+        cb.setShort(objLenIndex, (short) length);
+        //will be helpful during print().
+        eroObjHeader.setObjLen((short) length);
+
+        //As per RFC the length of object should be multiples of 4
+        int pad = length % 4;
+
+        if (pad != 0) {
+            pad = 4 - pad;
+            for (int i = 0; i < pad; i++) {
+                cb.writeByte((byte) 0);
+            }
+            length = length + pad;
+        }
+
+        objLenIndex = cb.writerIndex();
+        return objLenIndex;
+    }
+
+    /**
+     * Builder class for PCEP ERO object.
+     */
+    public static class Builder implements PcepEroObject.Builder {
+
+        private boolean bIsHeaderSet = false;
+
+        private boolean bIsPFlagSet = false;
+        private boolean bPFlag;
+
+        private boolean bIsIFlagSet = false;
+        private boolean bIFlag;
+
+        private PcepObjectHeader eroObjHeader;
+        LinkedList<PcepValueType> llSubObjects = new LinkedList<PcepValueType>();
+
+        @Override
+        public PcepEroObject build() {
+
+            PcepObjectHeader eroObjHeader = this.bIsHeaderSet ? this.eroObjHeader : DEFAULT_ERO_OBJECT_HEADER;
+
+            if (bIsPFlagSet) {
+                eroObjHeader.setPFlag(bPFlag);
+            }
+
+            if (bIsIFlagSet) {
+                eroObjHeader.setIFlag(bIFlag);
+            }
+
+            return new PcepEroObjectVer1(eroObjHeader, this.llSubObjects);
+        }
+
+        @Override
+        public PcepObjectHeader getEroObjHeader() {
+            return this.eroObjHeader;
+        }
+
+        @Override
+        public Builder setEroObjHeader(PcepObjectHeader obj) {
+            this.eroObjHeader = obj;
+            this.bIsHeaderSet = true;
+            return this;
+        }
+
+        @Override
+        public LinkedList<PcepValueType> getSubObjects() {
+            return this.llSubObjects;
+        }
+
+        @Override
+        public Builder setSubObjects(LinkedList<PcepValueType> llSubObjects) {
+            this.llSubObjects = llSubObjects;
+            return this;
+        }
+
+        @Override
+        public Builder setPFlag(boolean value) {
+            this.bPFlag = value;
+            this.bIsPFlagSet = true;
+            return this;
+        }
+
+        @Override
+        public Builder setIFlag(boolean value) {
+            this.bIFlag = value;
+            this.bIsIFlagSet = true;
+            return this;
+        }
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass()).add("EroObjHeader", eroObjHeader).add("SubObjects", llSubObjects)
+                .toString();
+    }
+}