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95 lines
2.2 KiB
Java
95 lines
2.2 KiB
Java
package component;
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import encoding.*;
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/*
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* @Author: Wang Feng
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* @Description: 表示一个内容的新鲜期 TLV 组件
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* @Version: 1.0.0
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* @Date: 16:10 2021/3/9
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* @Copyright: MIN-Group;国家重大科技基础设施——未来网络北大实验室;深圳市信息论与未来网络重点实验室
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*/
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public class FreshnessPeriod implements TlvComponentBase,InitialAble, IEncodingAble {
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// 成员变量
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private long freshnessPeriod;
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// 函数
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public long getFreshnessPeriod() {
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return this.freshnessPeriod;
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}
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public void setFreshnessPeriod(long freshnessPeriod) {
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this.freshnessPeriod = freshnessPeriod;
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this.doInitial();
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}
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// 接口实现-变量区
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private boolean initial=false;
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// 接口实现-方法区
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@Override
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public void doInitial() {
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initial=true;
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}
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@Override
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public boolean isInitial() {
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return initial;
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}
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/**
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* 将 FreshnessPeriod 线速编码为一个 TLV
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* @param encoder
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* @return
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*/
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@Override
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public int wireEncode(Encoder encoder) {
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int totalLength=0;
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// 编码 TLV-VALUE
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int tmplen=encoder.prependNonNegativeInteger(this.freshnessPeriod);
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if(tmplen==0){
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return 0;
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}
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totalLength+=tmplen;
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// 编码 TLV-LENGTH
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tmplen+=encoder.prependVarNumber(new VlInt(totalLength));
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if(tmplen==0){
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return 0;
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}
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totalLength+=tmplen;
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// 编码 TLV-TYPE
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tmplen+=encoder.prependVarNumber(new VlInt(TLV.TlvFreshnessPeriod));
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if(tmplen==0){
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return 0;
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}
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totalLength+=tmplen;
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return totalLength;
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}
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/**
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* 从 TLV Block 中解码出一个 FreshnessPeriod
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* @param block
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* @return
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*/
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@Override
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public boolean wireDecode(Block block) {
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// 检查 Type 是否正确
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if(!TLV.expectType(block.getTlvType(),new VlInt(TLV.TlvFreshnessPeriod))){
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return false;
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}
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// 读取 value
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long value=TLV.readNonNegativeInteger(block.getValue(),0,block.getLength().getVlIntValue2Int());
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if(value<0){
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return false;
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}
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this.setFreshnessPeriod(value);
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return true;
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}
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}
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