org.onosproject.pcepio.protocol.ver1.PcepInterLayerObjectVer1 Maven / Gradle / Ivy
/*
* Copyright 2015-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.pcepio.protocol.ver1;
import org.jboss.netty.buffer.ChannelBuffer;
import org.onosproject.pcepio.exceptions.PcepParseException;
import org.onosproject.pcepio.protocol.PcepInterLayerObject;
import org.onosproject.pcepio.types.PcepObjectHeader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.MoreObjects;
/**
* Provides PCEP inter layer object.
*/
public class PcepInterLayerObjectVer1 implements PcepInterLayerObject {
/*
* 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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reserved |N|I|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
private static final Logger log = LoggerFactory.getLogger(PcepInterLayerObjectVer1.class);
public static final byte INTER_LAYER_OBJ_TYPE = 1;
public static final byte INTER_LAYER_OBJ_CLASS = 18;
public static final byte INTER_LAYER_OBJECT_VERSION = 1;
public static final short INTER_LAYER_OBJ_MINIMUM_LENGTH = 8;
public static final boolean DEFAULT_IFLAG = false;
public static final boolean DEFAULT_NFLAG = false;
public static final int OBJECT_HEADER_LENGTH = 4;
public static final int NFLAG_SHIFT_VALUE = 0x02;
public static final int IFLAG_SHIFT_VALUE = 0x01;
static final PcepObjectHeader DEFAULT_INTER_LAYER_OBJECT_HEADER = new PcepObjectHeader(INTER_LAYER_OBJ_CLASS,
INTER_LAYER_OBJ_TYPE, PcepObjectHeader.REQ_OBJ_OPTIONAL_PROCESS, PcepObjectHeader.RSP_OBJ_PROCESSED,
INTER_LAYER_OBJ_MINIMUM_LENGTH);
private PcepObjectHeader interLayerObjHeader;
private boolean bNFlag;
private boolean bIFlag;
/**
* Constructor to initialize all parameters for Pcep Inter Layer Object.
*
* @param interLayerObjHeader inter layer object header
* @param bNFlag N flag
* @param bIFlag I flag
*/
public PcepInterLayerObjectVer1(PcepObjectHeader interLayerObjHeader, boolean bNFlag, boolean bIFlag) {
this.interLayerObjHeader = interLayerObjHeader;
this.bNFlag = bNFlag;
this.bIFlag = bIFlag;
}
/**
* Sets Object Header.
*
* @param obj object header
*/
public void setInterLayerObjHeader(PcepObjectHeader obj) {
this.interLayerObjHeader = obj;
}
@Override
public void setbNFlag(boolean bNFlag) {
this.bNFlag = bNFlag;
}
@Override
public void setbIFlag(boolean bIFlag) {
this.bIFlag = bIFlag;
}
/**
* Returns object header.
*
* @return inter Layer Object Header
*/
public PcepObjectHeader getInterLayerObjHeader() {
return this.interLayerObjHeader;
}
@Override
public boolean getbNFlag() {
return this.bNFlag;
}
@Override
public boolean getbIFlag() {
return this.bIFlag;
}
/**
* Reads channel buffer and returns object of PcepInterLayerObject.
*
* @param cb of type channel buffer
* @return object of PcepInterLayerObject
* @throws PcepParseException when fails to read from channel buffer
*/
public static PcepInterLayerObject read(ChannelBuffer cb) throws PcepParseException {
PcepObjectHeader interLayerObjHeader;
boolean bNFlag;
boolean bIFlag;
interLayerObjHeader = PcepObjectHeader.read(cb);
//take only InterLayerObject buffer.
ChannelBuffer tempCb = cb.readBytes(interLayerObjHeader.getObjLen() - OBJECT_HEADER_LENGTH);
int iTemp = tempCb.readInt();
bIFlag = ((iTemp & (byte) IFLAG_SHIFT_VALUE) == IFLAG_SHIFT_VALUE);
bNFlag = ((iTemp & (byte) NFLAG_SHIFT_VALUE) == NFLAG_SHIFT_VALUE);
return new PcepInterLayerObjectVer1(interLayerObjHeader, bNFlag, bIFlag);
}
@Override
public int write(ChannelBuffer cb) throws PcepParseException {
//write Object header
int objStartIndex = cb.writerIndex();
int objLenIndex = interLayerObjHeader.write(cb);
if (objLenIndex <= 0) {
throw new PcepParseException(" ObjectLength Index is " + objLenIndex);
}
int iTemp = 0;
if (bIFlag) {
iTemp = iTemp | (byte) IFLAG_SHIFT_VALUE;
}
if (bNFlag) {
iTemp = iTemp | (byte) NFLAG_SHIFT_VALUE;
}
cb.writeInt(iTemp);
//Update object length now
int length = cb.writerIndex() - objStartIndex;
//will be helpful during print().
interLayerObjHeader.setObjLen((short) length);
cb.setShort(objLenIndex, (short) length);
objLenIndex = cb.writerIndex();
return objLenIndex;
}
/**
* Builder class for PCEP inter layer object.
*/
public static class Builder implements PcepInterLayerObject.Builder {
private boolean bIsHeaderSet = false;
private boolean bIsNFlagset = false;
private boolean bIsIFlagset = false;
private PcepObjectHeader interLayerObjHeader;
private boolean bNFlag;
private boolean bIFlag;
private boolean bIsPFlagSet = false;
private boolean bPFalg;
private boolean bIsIFlagSet = false;
private boolean iFlag;
@Override
public PcepInterLayerObject build() {
PcepObjectHeader interLayerObjHeader = this.bIsHeaderSet ? this.interLayerObjHeader
: DEFAULT_INTER_LAYER_OBJECT_HEADER;
boolean bNFlag = this.bIsNFlagset ? this.bNFlag : DEFAULT_NFLAG;
boolean bIFlag = this.bIsIFlagset ? this.bIFlag : DEFAULT_IFLAG;
if (bIsPFlagSet) {
interLayerObjHeader.setPFlag(bPFalg);
}
if (bIsIFlagSet) {
interLayerObjHeader.setIFlag(iFlag);
}
return new PcepInterLayerObjectVer1(interLayerObjHeader, bNFlag, bIFlag);
}
@Override
public PcepObjectHeader getInterLayerObjHeader() {
return this.interLayerObjHeader;
}
@Override
public Builder setInterLayerObjHeader(PcepObjectHeader obj) {
this.interLayerObjHeader = obj;
this.bIsHeaderSet = true;
return this;
}
@Override
public boolean getbNFlag() {
return this.bNFlag;
}
@Override
public Builder setbNFlag(boolean value) {
this.bNFlag = value;
this.bIsNFlagset = true;
return this;
}
@Override
public boolean getbIFlag() {
return this.bIFlag;
}
@Override
public Builder setbIFlag(boolean value) {
this.bIFlag = value;
this.bIsIFlagset = true;
return this;
}
@Override
public Builder setPFlag(boolean value) {
this.bPFalg = value;
this.bIsPFlagSet = true;
return this;
}
@Override
public Builder setIFlag(boolean value) {
this.iFlag = value;
this.bIsIFlagSet = true;
return this;
}
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("IFlag", bIFlag)
.add("NFlag", bNFlag).toString();
}
}
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